Informix Drivers

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- Previous
  - 1
    - SQLTransaction IsolationLevel questions Hello, Sorry for posting this in more than one place, I meant to put it in this newsgroup, not m.p.d.f.aspnet... I have a VB.NET subroutine similar to the following: Private Sub RunUpdateTransaction(ByVal UpdateSQL As String, ByVal UpdateConn As SqlConnection) Dim trnDedupe As SqlTransaction = UpdateConn.BeginTransaction(IsolationLevel.ReadCommitted, "Dedupe") Dim cmdDedupe As New SqlCommand(UpdateSQL, UpdateConn, trnDedupe) Try Dim iUpdated As Integer iUpdated = cmdDedupe.ExecuteNonQuery trnDedupe.Rollback() Catch ex As Exception Throw ex Finally If Not cmdDedupe Is Nothing Then cmdDedupe.Dispose() End Try End Sub UpdateSQL looks like: INSERT INTO MyTable1(Field1, Field2)(SELECT Field1, Field2 FROM MyTable1 WHERE MyId1 = 123); UPDATE MyTable2 SET MyID1 = (SELECT MAX(MyID1) FROM MyTable1) WHERE MyID1 = 123 AND MyID2 = 456; I have a breakpoint on trnDedupe.Rollback(). I then switched to Query Analyzer and tried to run a query SELECT * FROM MyTable1 WHERE MyID1 = (SELECT MAX(MyID1) FROM MyTable1) I started this query before I stepped away from my desk and it's been running for 2-1/2 hours. Should I try another type of IsolationLevel other than ReadCommitted. It looks like ReadCommitted might be good to prevent someone else from inserting a record into MyTable1 in between my INSERT and UPDATE. From the documentation: -------------------------------------------------------------------------------------- ReadUncommitted: Shared locks are held while the data is being read to avoid dirty reads, but the data can be changed before the end of the transaction, resulting in non-repeatable reads or phantom data. ReadUncommitted: A dirty read is possible, meaning that no shared locks are issued and no exclusive locks are honored. RepeatableRead: Locks are placed on all data that is used in a query, preventing other users from updating the data. Prevents non-repeatable reads but phantom rows are still possible. -------------------------------------------------------------------------------------- If I'm reading the documentation correctly, it looks like I might want to use ReadUncommitted for my testing and ReadUncommitted when I'm using the application in production to prevent inserts between my INSERT and UPDATE. Would any of the other IsolationLevels be useful? Thanks, Eric Tag: Informix Drivers Tag: 129592
  - 2
    - Need help with Case-sensitive queries in SQLServer 2000 I need to retrieve records just as they are and enforce case-sensitivy. For example, my query return 'E1234' in place of 'e1234'. I want to return exactly what is in the table. How do I do that? Thnaks mo Tag: Informix Drivers Tag: 129590
  - 3
    - Bindingsource c# Hi there, are there any good reference examples for using a bindingsource object ? I new to ado.net and trying to create a simple maintenance app on an sql mobile database. I created a datasource and then dragged a table onto my form (Detail mode). Where to go from there ? thanx in advance. Tag: Informix Drivers Tag: 129587
  - 4
    - New to ASP.Net, Cascading DropDown List in Detail View...Please help A) Destination Table with 4 Fields. 1) Last Name 2) First Name 3) State 4) Zip Code. B) Look up table State/Zip Code with 2 Fields 1) State 2) Zip Code. I created a DetailView Form in Asp.net to Insert/Update Destination Table. Destination Table's State and Zip Code Fields are converted from Bound Column to Item/Edit/Insert Template, Created 2 Drop Down Lists, DDLState and DDLZIP. I am using '<%# Bind(...)%>' for both of them. Also, I do have 2 SQLDatasource for DDL's (i.e. SqlState for DDLState and SqlZip for DDLZIP). My Intention is very simple: When user select State Name from DDLState DropDownList List (example: NJ), in DDLZIP Dropdown list it must show only Zip Codes from that State. In order to Change the Value of DDLZIP, users must Change the Value of DDLState. Basically DDLZIP is Child/Dependant of DDLState. I did correctly setup proper reference to DDLState in SelectedParameters, Control Parameters, PropertyName in SqlZip (SqlDataSource for DDLZIP). This Cascading dropdown logic does work Fine in a Form without a DetailView. I tested it. But I am having hard time to implement this within Detail View. Any Complete Example (i.e. Form with Subs) will be highly appreciated. I will be glad if this example is based on NorthWind Database. Thanks a lot for your time and efforts. - Sam Tag: Informix Drivers Tag: 129584
  - 5
    - Validating Data using Typed Dataset Hi! All, How can i validate data filling into a typed dataset? e.g. Say I am importing data from a flat file into a typed dataset. I want to validate that each data entering into the dataset are in match with the dataset Schema and if any error i want to log the same row and move to execute the next row. How do I do this?? Regards, Baren Tag: Informix Drivers Tag: 129583
  - 6
    - Datasets fundamental Hi there! I'm very new to dot net envirnoment and have little bit understanding. Due to some reason, I need to work straight forward on datasets and webservices and xml. I don't have much hold on the same but would appreciate if someone put lights on the given questions: a) How datasets which has passed by value can be retreived from cache? b) How would one know whether datasets is containing any records or not? Is there any way to test the same? Please let me know via coding. c) How long datasets will store in server memory? d) How to create a dataset and publish it in cache? Beside this, I do have other questions which will not fall into this group like : 1) How to map datasets records to update a MYSQL Server? Please help me out. With Thanks! Shyam Tag: Informix Drivers Tag: 129581
  - 7
    - PLEASE tell me how to handle RowUpdated with/against a typed dataset I have searched and searched and searched and sear.. anyway, you get the idea. I am trying desperately to figure out how, in "C++/CLI" (Managed C++/2005) to handle the RowUpdated event in my code but can not find an answer that works. I either get the always fun "error C3767: 'FrameWorks::eclipseDataSetTableAdapters::RepairDataTableAdapter::Adapter::get': candidate function(s) not accessible" error, or other various errors. Apparently, my strongly typed RepairDataTableAdapter does NOT expose anything that even looks like RowUpdated. So, given that, I thought ok, I'll do it the hard way, and try to deal with this with untyped .. objects. So I've tried to create an adapter that would expose RowUpdated, but then I wanted to get the existing insert, update, ... commands from my typed adapter so that I wouldn't completely redo all my database code. Well, that didn't work either because those objects are also not exposed. Not even read-only! This is what led to the error above. Is there SOMEONE, ANYONE out there who can tell me how the frell to handle RowUpdated with a typed adapter? I'm begging here. Thanks, Scott "Cmdr. Beavis" F. Tag: Informix Drivers Tag: 129574
  - 8
    - Open DataReader associated with this Command which must be closed first. Hello, I'm getting the a "There is already an open DataReader associated with this Command which must be closed first" error message in the following scenario. The message seems misleading, since the command isn't associated with the datareader, but the connection is. Is there any way to get this work work without closing my DataReader? Thanks, Eric ------- Dim conn As SqlConnection Dim cmd As SqlCommand Dim drTests As SqlDataReader strTestQuery = BuildTestSQL() cmd = New SqlCommand(strTestQuery, conn) drTests = cmd.ExecuteReader Dim iDataRowCounter As Integer = 0 Do While drTests.Read Dim strTest2SQL As String strTest2SQL = BuildTest2SQL() RunUpdateTransaction(strTest2SQL, conn) Loop Private Sub RunUpdateTransaction(ByVal UpdateSQL As String, ByVal conn As SqlConnection) Dim cmdTest As New SqlCommand(UpdateSQL, conn) Try Dim trnTestTest As SqlTransaction trnTestTest = conn.BeginTransaction(IsolationLevel.ReadCommitted, "TestTest") Dim iUpdated As Integer iUpdated = cmdTest.ExecuteNonQuery 'TODO:Change rollback tran to Commit trnTestTest.Rollback() 'trnTestTest.Commit() Catch ex As Exception Throw ex Finally If Not cmdTest Is Nothing Then cmdTest.Dispose() End Try End Sub Tag: Informix Drivers Tag: 129564
  - 9
    - Generating a collection from a data set table Hi, I have a strongly typed dataset with 2 tables: Orders and OrdersDetails, that have a parent-child relationship by OrderId. I want to be able to work sequentually on each row in Orders and in OrderDetails in the following manner: foreach (TableRow HeadRow in Orders.Rows) { ... foreach(TableRow DetRow in OrdersDetails.Rows) { ..... } } My question is how can I make sure the inner foreach works only on the Rows that have the same OrderId (the OrderId from the outter foreach) Thanks Tag: Informix Drivers Tag: 129563
  - 10
    - Good way to do lookups I want to have a a set of "records" (i.e. would have used a Recordset in the VB6 world) that contains a list of say 500 short string values to lookup and then 500 short strings to replace them with when found. What I'm going to use this record set for is to lookup the parts of a street address and replace them with standard abbreviations. What I could use guidance with is the best object to use for this record set which will be used for lookups. Tag: Informix Drivers Tag: 129562
  - 11
    - merge not working I'm trying to handle concurrency updating errors in my app - vb.net 2003, ado.net 1.1. I have a datatable with the data the user pulled and then changed ("dtMain") and another that I filled after the updates failed, with the most current data in the database ("dtConflict"). I am allowing the user to decide on a row-by-row basis how to handle the update. When I try to merge a particular row's current values (from "dtConflict") into the main table ("dtMain") nothing is happening. Here is the code (I added dtMain to a dataset "dsBig" in order to access the Merge method, which is still unavailable to me on a datatable as I'm in ado.net 1.1): Dim row As DataRow = CType(objCurrencyManager.Current, DataRowView).Row Dim rowConflict As DataRow = dtConflicts.Rows.Find(row(0)) if blnPreserve = True then dsBig.Merge(New DataRow() {rowConflict}, True, MissingSchemaAction.Ignore) else dsBig.Merge(New DataRow() {rowConflict}) end if row.ClearErrors() The merge does not throw an exception but neither does it get the new values. This code is basically taken from David Sceppa's Microsoft ADO.NET (Core Reference). Tag: Informix Drivers Tag: 129561
  - 12
    - AutoIncrement and MultiStep OLE DB Hello this error starts to really go o nmy nerves. I Searched the i net but found no solution for it. Maybe you can help. My problem is, that i want to convert an Access-DB into a SQL-Server DB (i cant use the tools, because this should work also on systems which only have the MSDE and no access). The error ocurres when the "AutoIncrement" Property is set to true and i try to add the Table to the SQL-Server-DB (e.g. Catalog). The only solution i found for a similar problem, is that the catalog has to be set prior to the properties are manipulated. I do this, but still it doesnt work. I use MDAC 2.8, SQL-Server 2000 What am i missing??? Thanks Matthias This is the code (C#): protected void CloneColumn(ADOX.Table refTable, ref ADOX.Table destTable, string refColumnName, string destColumnName, ref ADOX.Catalog catDest) { ADOX.Column newColumn = new ADOX.ColumnClass(); newColumn.ParentCatalog = catDest; newColumn.Name = destColumnName; newColumn.Type = refTable.Columns[refColumnName].Type; if (newColumn.Type==ADOX.DataTypeEnum.adDate) newColumn.Type= ADOX.DataTypeEnum.adDBTimeStamp; newColumn.DefinedSize = refTable.Columns[refColumnName].DefinedSize; UpdateColumnProperties(refTable.Columns[refColumnName], ref catDest, ref newColumn, Common.Constant.listOfSupportedProperties, "created"); destTable.Columns.Append( newColumn, newColumn.Type,newColumn.DefinedSize); } protected void UpdateColumnProperties( ADOX.Column referenceColumn, ref ADOX.Catalog catDest, ref ADOX.Column targetColumn, string[] listOfSupportedProperties, string actionMsgString) { Array listOfSupportedPropertiesArray = (Array)listOfSupportedProperties; System.Collections.ArrayList listOfSupportedPropertiesArrayList = new System.Collections.ArrayList (listOfSupportedPropertiesArray); System.Collections.IEnumerator propertyEnumerator = null; propertyEnumerator = referenceColumn.Properties.GetEnumerator(); propertyEnumerator.Reset(); string propertyName = ""; while (propertyEnumerator.MoveNext()==true) { try { for(int i=0;adoConnDest.Errors.Count>0;i++) { string errorStr=adoConnDest.Errors[i].Description; } propertyName = ((ADOX.Property)propertyEnumerator.Current).Name; if(listOfSupportedPropertiesArrayList.Contains(propertyName)) // check the property name with the allowed properties { try { Object oldObj = targetColumn.Properties[propertyName].Value; Object newObj = referenceColumn.Properties[propertyName].Value; if(newObj!=null) { if( newObj.Equals(oldObj)==false ) // check if an update is neccessary { if (newObj.ToString().StartsWith("\"")) { newObj=newObj.ToString().Replace("\"","'"); } targetColumn.Properties[propertyName].Value = newObj; Object changedObj = targetColumn.Properties[propertyName].Value; // for debugging if(oldObj!=null) Common.MessageLogger.getInstance().WriteLogMessageToFile("\tColumn property '" + propertyName + "' ("+oldObj.ToString()+"<>"+newObj.ToString()+") "+actionMsgString+"."); else Common.MessageLogger.getInstance().WriteLogMessageToFile("\tColumn property '" + propertyName + "' (null<>"+newObj.ToString()+") "+actionMsgString+"."); } } } catch(Exception error) { Common.MessageLogger.getInstance().WriteLogMessageToFile("Exception catched during updating property '" +propertyName+"':"+ error.Message); } } for(int i=0;adoConnDest.Errors.Count>0;i++) { string errorStr=adoConnDest.Errors[i].Description; } } catch(Exception error) { Common.MessageLogger.getInstance().WriteLogMessageToFile("Exception catched during updating property '" +propertyName+"':"+ error.Message); } Control.GenericEpxUpdateTool.getInstance().GetMainForm().IncreaseProgressBar(); } } Tag: Informix Drivers Tag: 129559
  - 13
    - Migration from ADO to ADO.Net with SqlClient I am trying to get to terms with the use of updating through a data adaptor in VS 2005. The application allows the user to create forms and add fields and tables to the database and so the code has to be generic. In ADO, one can read the record,change the value and simply update: RecordSet.Fields(FieldName)=SomeValue RecordSet.Update I can update a DataSet in a similar way, but how do I get the chages back to the database? The data adaptor needs an UpdateCommand, but I cant find any information about what this should be like. Any help would be welcome. -- John Austin Tag: Informix Drivers Tag: 129558
  - 14
    - Oracle- and ODBC Provider missing in Visual Studio Express 2005 Hello, I have Visual C# Express 2005 and Oracle 10g installed. After some problems with different versions of Oracle including a restoring of a system restore-point I now have the following problem: When I try to add a data source to my project I can only select Access-File via OLEDB or Local MSSQL Server file via .NET provider. As far as I know there should also be an Oracle and an ODBC Provider available, but they are missing. I tried to install everything new including the NET-2.0-framework, but still the same problem. Somewhere I read, that in the machine.config file the available providers are listed, but there are all 4 present. Does anyone know what to do? Thanks in advance Sascha Tag: Informix Drivers Tag: 129548
  - 15
    - SQL Migration - Varchar 8000 in SQL 2005 Hello, We have migrated a sql server 2000 database to sql server 2005, this was done through scripts (table, stored procedures and data). To access this database we are using an ASP.Net 2.0 application which uses the sqlhelper Aplication Block to connect to the database. Everything works fine except one Stored Procedure which has an OUT varchar(8000) parameter. We use the following .Net Code to execute the stored procedure this stored procedure: aParams[2] = sSerDatos.GetParameter("@DominiosMenu", DbType.String, 8000); aParams[2].Direction = ParameterDirection.Output; sSerDatos.ExecuteNonQuery("VM_SDominiosMenu", aParams) When we invoque the sqlcommand we get this sqlexception: The incoming tabular data stream (TDS) remote procedure call (RPC) protocol stream is incorrect. Parameter 3 ("@DominiosMenu"): Data type 0xE7 has an invalid data length or metadata length. If we change the DbType.String Size to 4000 in the .Net code everything works, this same procedure works correctly in SQL Server 2000 with the same .Net code. Any help would be appreciated. Thanks, Sam Tag: Informix Drivers Tag: 129542
  - 16
    - How to change encoding for XML Column I am updating an xml column in SQLServer 2005, but it always gives me an error "XML parsing: line 1, character 38, unable to switch the encoding" my csharp is like the following cmd.Parameters.Add("@xml", SqlDbType.Xml); cmd.Parameters["@xml"].Value =xmldata; My xml have the following line "<?xml version="1.0" encoding="UTF-8"?>..." If I remove this line, everything is OK, looks like the SQLParameter is set to UTF-16 and my xml data is set to UTF-8, how do I make SQLParameter take UTF-8? I did not see any properties under SQLParameter to change the encode. Please advice. Thanks in advance. John Tag: Informix Drivers Tag: 129540
  - 17
    - Connection Pool Time Out Hi all, I have the following scenario: App1: Asp.Net Application that shows reports from some SQL DB App2: Asp.Net WebService with two services exposed for clients, and a single â??Checkerâ?? in the Application object that checks every some time (normally 2 or 3 minutes) for conditions in the same DB, and insert some values in it using a transaction. When the time spans completes, the checker retrieves via a SqlDataReader the ready items and make the insertions as shown: SqlDataReader reader = GetReadies(); try { // do something // initialize the transaction â??transâ?? and the connection â??conâ?? try { // insert using the transaction trans.Commit(); } catch(Exception ex) { trans.Rollback(); throw ex; } finally { trans.Dispose(); con.Close(); } } finally { reader.Close(); } In the web application I have few pages that get information from the DB, and after a few retrievals, I got this error: â??Timeout expired. The timeout period elapsed prior to obtaining a connection from the pool. This may have occurred because all pooled connections were in use and max pool size was reached.â?? So I review all code searching for unclosed datareaders or connections, for nothing. I use SQLHelper in the web application and I always retrieve datasets, anyway, I checked that all connections were closed. Then I review the code in the webservice app, I think it is correct, isnâ??t it? Even though I didnâ??t found unclosed connections, I started to watch the .Net CLR Data performance object with the object Current # pooled connections. The graph never goes over 7 connections; it oscillates between 5 and 8. I also started a new trace in the SQLProfile to see if it audits logout events occurs. And still, after a while browsing in the asp.net application, I receive the same error. Note: the max pool size is set to 100 explicitly. Any idea of the cause? Thank you very much. Tag: Informix Drivers Tag: 129539
  - 18
    - txn isolation level Hi, Should the transaction isolation level persist across the reuse of a connection from the connection pool? From my experiment it does persist and I was not expecting it. I was under the impression that "sp_reset_connection" will tear down all the connection level settings and go back to the defaults. I am using the sql .net provder with the 1.1 framework and connecting to a sql 200 server. Just wondering if this is a bug or by design ... -- Vikram Vamshi Database Engineer Eclipsys Corporation Tag: Informix Drivers Tag: 129538
  - 19
    - VB.NET and SQL Server 2005 - Data locked when they should be. LOOK Hi, I have 2 ways of selecting data from my table "Membre". 1- By permit number (memNoPermis) 2- By lastname, firstname (memNom AND memPrenom) SAMPLE DATA: memNoPermis: 1 memNom: Walter memPrenom: Gregory memNoPermis: 2 memNom: Wick memPrenom: Timothee memNoPermis: 3 memNom: Williams memPrenom: Simon He is my weird scenario. FIRST- I run this query. SELECT M.memNoPermis, M.memNom, M.memPrenom FROM Membre M WITH (UPDLOCK, NOWAIT) WHERE M.memNoPermis = 2 It reads & locks the record ! FINE. ----- After, if I run this query : SELECT M.memNoPermis, M.memNom, M.memPrenom FROM Membre M WITH (UPDLOCK, NOWAIT) WHERE M.memNom = 'Williams' AND M.memPrenom = 'Simon' It tells me its lock ... but that is false. Only record id 2 should be locked. The query above should return unlocked record id 3. BUT If I run the following query instead.. which ask for the same record. SELECT M.memNoPermis, M.memNom, M.memPrenom FROM Membre M WITH (UPDLOCK, NOWAIT) WHERE M.memNoPermis = 3 In this case the record can be selected as if it wasn't locked (which is the case). Can anyone help me on this? memNoPermis is my table PrimaryKey field. Could my problem be related to that? I made many tests. If I only read records with "memNoPermis" in my WHERE clause, everything works perfectly. BUT. More explanation: If I read record id 3 with memNom+memPrenom and no row it locked ! GREAT. READS & LOCKS. While record id 3 is locked: If I read record id 2 (which is before 3 in the table) with memNom+memPrenom ... GREAT. READS & LOCKS. BUT Instead if I read record id 4 (which is after 3 in the table) .. it acts as if I was locked already...which is wrong. Pretty strange. When reading with (memNom+memPrenom) in my WHERE clause, If the record I need is after a locked record in my table, it acts as if it was locked already. When reading with (memNoPermis <-- PK field) in my WHERE clause, In all cases it always works great !! Thanks for helping me resolving this problem. I tried putting memNoPermis+memNom+memPrenom in a UniqueKey. But it didn't help. Tag: Informix Drivers Tag: 129537
  - 20
    - DBTransaction question Hi, I have some code like this : DBTransaction = DBConnection.BeginTransaction() Assuming I don't book keep the return from this call , How do I 1) determine if there is a DBTransaction pending on this DBConnection and 2 ) if there is , what is the DBTransaction . thanks -chaz Tag: Informix Drivers Tag: 129536
  - 21
    - How To Use Keyword DataDirectory For Database In Same Folder As Executable Hello, With a fairly complete and detailed example, how do I use the DataDirectory keyword? What I ultimately want to do is place my database in the same folder as the executable and have my application find it there. Thank you, Christopher Lusardi Tag: Informix Drivers Tag: 129535
  - 22
    - ExecuteNonQuery with error checking (or continue on error equiv) First off I'll explain why I need something similar to ContinueUpdateOnError feature that a data adapter has, and why I can't just use a data adapter. Basically I'm updating a Large amount of data using BCP to copy the data to a temp table in order to quickly move the mass amount of data from a flat file to my database. I Then run updates on the temp table I just loaded that insert AND update the data from the temp table to the production table. The reason i do this is because my data (unfortunately) contains both inserts and updates. The most efficient way I've found to do this involves using BCP to move the data, then running SQL Statements I have generated to process the updates and inserts from the temp table to the production table in the database. I'm using something 'similar' to the BCP code from the PDC 05 Demo's ( http://blogs.msdn.com/dataaccess/archive/2006/01/09/510083.aspx ) Well it appears that when using try/catch if I have errors that yes it will catch the error, however I have no control over it. The entire Update command will then hault not updating any records. Is there some way to have the ability to continue on with my SQL statement if it happens to hit a record that doesn't have a corresponding foreign key or something similar? Thanks -- Matt www.Fiddelke.org Tag: Informix Drivers Tag: 129528
  - 23
    - Tabeladapter with row_number() over... Hi Friends, I have created a tableadapter (using wizard of VS2005) with some SQL query statement. But I want to write SQL query such a way that it returns table with one more fields, i.e. Row number. I have tried this SQL query in SQL server 2005: select ordernumber, row_number() over( order by ordernumber) sno from orderhead It's working in SQL server 2005 but not in table adapter (It gives SQL syntax error in 'Add Query' wizard). Please help me to add such a column in SQL. And why should tableadapter give any error? This query is working with dataadapter!! I mean, this code is working Dim ds As New DataSet Dim da As New SqlClient.SqlDataAdapter("select ordernumber, row_number() over( order by ordernumber) sno from orderhead" _ , conStr) da.Fill(ds, "TAB1") Thanks in Advanced, -Yogee Tag: Informix Drivers Tag: 129520
  - 24
    - Binding to object datasource I have created a project that contains a typed dataset. I have extended this dataset through partial classes an daab 2.0. I have created a datasource out of this project through the datasources wizard in a new winforms project , I have a dropped a binding source component on the form . When I try to bind the bindingsource to the object datasouce , I get an invalid property error. If i try and expand the node containing this object datasource in the data sources window , the i.d.e shuts down with out warning. Using vs 2005 proefessional vb.net Any help whatsoever would be greatly appreciated Tag: Informix Drivers Tag: 129519
  - 25
    - OleDbCommand.Parameters.Add and 'IN' Comparator and MSAccess I am using Visual Studio with a MS Access Database I just can not work out how to create my parameter for the following Select Fld1, Fld2 from myTable where Fld1 in (?) The value I wish to add to the parameter collection for Fld1 is '2, 3, 17, 9, 235' to add a single Parameter I would do the following cmd.parameters.add("",oledbtype.integer).value = 1 There does not seem to be an OleDbType for an integer array But I don't have a single value and I do not know how many values, there will be in the 'IN' query I also have other parameters in the Selection (not shown) and as OleDbParameters, seem to be positional, with no way of changing that, I can't just enter many '?' into the 'IN' part and only enter as many as I need. In any case what would happen if I had multiple 'IN' comparators. Any ideas or suggestions, welcomed Tag: Informix Drivers Tag: 129514
- Next
  - 1
    - About Load-on-Demand ADO.NET skill. I want to improve my C# ADO.NET skills. I want to study how to handle Load-On-Demand and Paging Skills in C#. Is there any information to study? Tag: Informix Drivers Tag: 129511
  - 2
    - Two DataViews of the Same database Table but different columns Hi, I'm new to ADO.Net and I want to DataViews containing different columns of the same database table. Is it possible without creating 2 dataadpaters? Thank you, Scott Tag: Informix Drivers Tag: 129509
  - 3
    - sql server 2005 crashes by sqlbulkcopy when the column size does not match dear all, i am having this strange problem. What i have done is i load a datatable to the sql server 2005 using the sqlbulkcopy. when the column size of the destination table is less than the value of the mapped column of the datatable instead of throwing exception the sql server 2005 instead crashes. the only exception that gets caught is the transport level error( TCP Provider, error: 0 .......) what is happening ???? i am so confused. here is the part of the code: ......... SqlConnection oSQLConn = new SqlConnection(); oSQLConn.ConnectionString = Config.GetConnectionString(); oSQLConn.Open(); try{ System.Data.SqlClient.SqlBulkCopy bc= new System.Data.SqlClient.SqlBulkCopy(oSQLConn, SqlBulkCopyOptions.TableLock, null); .......................... ............................// other part of the code the initializes the // DataTable with name dataTable bc.BatchSize = 500; bc.DestinationTableName = "desttable"; bc.WriteToServer(dataTable); bc.close(); } catch(Exception exe){} ..... if anyone knows what is wrong.. or what is going wrong then it would be a great help to me. this is causing a lot of headache.... regards, kamal Tag: Informix Drivers Tag: 129504
  - 4
    - How to udpate and alter procedure at once. I want to use SqlCommand.ExecuteNonQuery to execute a Sql which is read from a text file. I want to sql to update a record in myTable, and alter a procedure. The text file is like: -------------------------------------------------------------------------------- UPDATE myTable set Col1='text' ALTER procedure [dbo].[EmptyData] as Delete from Acc; Delete from BodyMind; Delete from Checks; Delete from CheckTemp; -------------------------------------------------------------------------------- when I execute the ExecuteNonQuery, it result into an error: The Alter command must in the first line. But if I put the Update command at last line, it become a part of the ALTER procedure. How can I udpate and alter procedure at once. Tag: Informix Drivers Tag: 129491
  - 5
    - Loading data into an Access Table from CSV or XML I have lots of old data files, which I am adding to an Access Database. I read somewhere, that you can select directly on a CSV file or XML by changing the Connection String - Extended Property - or I could have been dreaming. So to save a lot of coding and before I break everything, is it possible to do something like the following COPY CSV into an Access Table INSERT INTO TABLE1 (Fld1, fld2, fld3, fld4) SELECT fld1, fld2, fld3, fld4 from mycsv.csv COPY XML into an Access Table INSERT INTO TABLE1 (Fld1, fld2, fld3, fld4) SELECT fld1, fld2, fld3, fld4 from myxml.xml Using OleDbCommand.executeNonQuery If it is possible, some sample code would be very helpful Thanks for any help - Richard Tag: Informix Drivers Tag: 129490
  - 6
    - create *.cub file from DataSet Hi, The environment is .NET 1.1, VS2003. (can also be .NET 2.0 +VS2005) Suppose I have downloaded a DataSet from the server to the client machine. Now I want to create a *.cub file from this DataSet and save it to disk. I tried using ADOMD.NET but dodn't know how to connect to a DataSet. Is it at all doable? Thanks GM P.S. I have already asked this question on sqlserver.olap group, but still didn't get any response. Tag: Informix Drivers Tag: 129489
  - 7
    - HELP!!! Error installing SQL Express 2005.... I have VS 2005 Pro installed, but I tried to install SQL Express (as I did not know if the "developer" edition that installs with 2005 Pro was the same as my customers would be using). I have got to the "SQL Server Database Services" line in the setup progress screen, and I get "SQL Server Setup has encountered the following problem: [Microsoft][SQL Native Client]Communication link failure. To continue, correct the problem, and then run SQL Server Setup again." I'd be happy to "Correct the problem..." if the error msg actually told me what it was or how to fix it. When I copied the text I also got this link (which basically says "we don;t know")... "For help, click: http://go.microsoft.com/fwlink?LinkID=20476&ProdName=Microsoft+SQL+Server&ProdVer=9.00.2047.00&EvtSrc=setup.rll&EvtID=60009&EvtType=lib%5codbc_statement.h%40sqlStatement%40OdbcStatement%3a%3aexecute_batch%40HotfixDBEINST%4013%40xea69 " I am leaving everything right where it is (and, yes, I backed up my system before embarking upon this little adventure). Anybody seen this one? Tag: Informix Drivers Tag: 129488
  - 8
    - Send Recieve data to insert into tables using Socket Hi, I have to develop a Client Server application. What I want is that the server will listen on a specific port and client will connect to the server and then send a request to retrieve/insert some data from/into the database. Database is placed on server side. What is the best way to send and retrive a large amount of data from a database over the sockets? Thanks in anticipation. Regards, Ahmad Jalil Qarshi Tag: Informix Drivers Tag: 129487
  - 9
    - how to set the value of the parameter for the SelectCommand? Hi, The gridview linked to this datasource shows nothing. The problem is the value of the variable 'a' which is not passed, i'm afraid ... The code-behind contains the value to be passed: public a As String Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load a = "phil" End Sub the aspx contains: <asp:SqlDataSource ID="SqlDataSource1" runat="server" ConnectionString="Provider=....." ProviderName="System.Data.OleDb" SelectCommand="SELECT [name],[city] FROM [mytable] where [name]= @name"> <SelectParameters> <asp:Parameter Name="name" DefaultValue=a /> </SelectParameters> </asp:SqlDataSource> Thanks Phil Tag: Informix Drivers Tag: 129486
  - 10
    - SQL Connection still working after KILL the process in SQL I would like to know why is this happening: We do have a multithreading windows application in C#. Each thread establish its own SQL connection to an SQL 2003 server,. Those are worker threads for remote proccess, and each one needs to mantain its own SQL connection and have connection pooling turned off due to company rules. There is also an SQL job in the database, which look for idle connections and KILL them (KILL spid). However, some times the remote "idle" process wasn't "idle", and tries to access again the database. The connection then fails with an expected "General Network Error". However, the conection does *STILL* working, at least from a code perspective: Still doing queries, still getting data, etc, just that error the *first time* it is used since its process ID was KILL in the database. We did some review, and found that a new connection is made each time we use the connection, and immediately disconnected upon completition... The new connection does have the same connection string that the killed one, and connection pooling is disabled ( pooling=false; ) for all the connections . Why is this happening? Is there a way to avoid it ? ************************************************ Here's part of the code. It is not the whole code, nor working, just to show how i am using the connection. All of this is inside a worker thread ---------------------- string scad = ""; scad = string.Format("server={0:s};database={1:s};user id={2:s};pwd={3:s};", gv.SVRTerm, gv.BDTerm, cve_usuario, password); scad += string.Format("pooling=false;"); ------------------------- oConn = new SqlConnection(scad); oConn.Open(); ----------------------- while (true == bActivo){ ----------------- try{ // sql is the process to realize in the server // it's taken from an string array with predefied queries using(SqlCommand ocmd = new SqlCommand(sql, oConn)){ ocmd.CommandType = CommandType.Text; using(SqlDataAdapter oda = new SqlDataAdapter()){ oda.SelectCommand = ocmd; oda.Fill(oDS); oda.Dispose();// } ocmd.Dispose(); } ----------------------- }catch(SQLException ex){ log(ex); } ---------------- } The connection it's established once at the thread start, an closed at thread end. The thread must not crash nor hang over no one circumpstance (and it has not hung nor crash AFAIK ) . In the worst case will log and send a message to the remote server, for that one kill the client process of this thread, and shutdown itself. Tag: Informix Drivers Tag: 129480
  - 11
    - InvalidCastException in DataRow Hello, This is a compactframework windows app. Iam trying read from a DataRow. myTextBox.Text=myDataRow("MyColumn") If there is a value for the myDataRow("MyColumn") then the statement executes. But if the column is empty I get invalidCastException, When casting from number etc.. I have tried CTYPE() or even check for "Is Nothing", just accesing the column gives me the exception. How can I prevent the exception from occuring. Underlying DataField is nvarchar(250) from SQLCE databse. Thanks jay Tag: Informix Drivers Tag: 129477
  - 12
    - ANN: C# Online.NET Open Soure List FOR IMMEDIATE RELEASE The Open Source Movement has yet to play as critical a role in the development of C# systems as it has in the development of Java systems. Perhaps, it never will. But, for those who cannot afford Microsoft licensing fees or who cannot wait for Microsoft to address a particular domain, open source is a viable alternative. C# Resources - Open Source is a new list of C# open source projects which are both free and open source. The recent sale of the JBoss Application Server to Red Hat for $350 million illustrates vividly that there is a difference. C# Resources - Open Source is here: http://www.csharp-online.net/csow/index.php?title=CSharp_Resources_-_Open_Source If you know of a C# open source project which is not yet listed, please add it under the appropriate category. Visit C# Online.NET for the best online C# resource. C# Online.NET A wiki-based C# and .NET resource featuring articles, code snippets, forums, study guides, and tutorials. http://wiki.csharp-online.net/ http://blog.csharp-online.net/ http://forum.csharp-online.net/ [ ANN: C# Online.NET Open Soure List ] Tag: Informix Drivers Tag: 129476
  - 13
    - multiple types of queries and stored procedures I'm using MySql and ADO.net I find myself in a situation where I need to execute many different types of queries. Basically they are all getting the same type of data, but with different WHERE clauses and different levels of required data. For example, one query "GetAllTest" will return ALL the test records in a table and all of the fields. Another query might be "GetRecentTests" which should only get the results from the last 10 days and I don't need to get all the fields, just a subset. I'm using a DataReader for performance reasons and my Dal layer is populating business entities with the results from the DataReader. My questions are: 1) What is the best practice for executing different types of queries with different filter criteria? My Sprocs are pretty long and to make a handful of them that vary only slightly (IE: WHERE _type LIKE 'Single', WHERE type LIKE 'Single' AND ID > 100, etc) and all share the same joins and selects seems like an incredible amount of redundancy. I've thought about using straight SQL rather than sprocs, then I could have a query builder class that could build the queries for me based on filter criteria. I don't want to go away from sprocs if I don't have to, they are so much more maintainable ;0) 2) Business entity population - I currently populate my business entities in the body of my DAL method (IE: GetAllTests) - this poses the same problem as #1, I would be repeating this code over and over for every DAL method that is responsible for getting results with slightly different filters. Seems like a ton of wasted code. I thought about creating an ObjectBuilder class that would take a DataReader and populate my objects for me, I could then use this in my various DAL methods. Is there another way? How do you all do this? These 2 problems must be something that many of you deal with on a regular basis. Do you have any ideas for me? I just though of one more, I could use a VIEW to keep all my joined results, then I would query against the VIEW with my filters, that would save me some redundancy in the sprocs I guess... but that VIEW would get pretty big as time goes on. I'm stuck, I need some hints, pointers, tips, clues, etc ;0) Thanks for any help, Steve Tag: Informix Drivers Tag: 129475
  - 14
    - why different syntaxes in Commnad lines? Hi, I saw three different syntaxes in command lines: UpdateCommand="UPDATE [mytable] SET [name] = @name ... UpdateCommand="Update `mytable` set `name`=? ... UpdateCommand="UPDATE [mytable] SET [name] = ? ... Does the three do the same? Why those differences? Thanks Phil Tag: Informix Drivers Tag: 129468
  - 15
    - Query builder parameter problem Using VS2005 Pro and dotnet 2.0 I am trying to add parameters in the query builder tool while configuring my data adapter using the data adapter configuration wizard. I right-click somewhere on the builder pane and then select properties. At the bottom of the properties window, there is a line that says 'Query Parameter Identification'. I click the ellipses to the right and I have three items to change - Prefix characters, Suffix characters, Escape characters. I put a Prefix character in the box (In this case I have tried the @ and % symbols), click ok and close the properties box. So far so good. Then in the filter column for the row I want to filter, I put the parameter name I want - in this case @UserID. The builder puts an '=' sign in front. Again, everything is fine. I click the Execute query button at the bottom left and the builder asks me for the parameter data. I input '222' and click ok. I get the results I was expecting. Great! But now the problem starts. I click Ok to exit the builder then click next on the data adapter configuration wizard. I get the following error: Generated Select statement Error in WHERE clause near '@' Unable to parse query text. When I click finish, I get a message box saying "An unexpected error has occurred. Error Message: Object reference not set to an instance of an object." I can't seem to get it to accept my parameters even though when I execute the query within the builder, everything works as expected. Has anyone had this same problem or can you recreate it? Thanks, Jay Tag: Informix Drivers Tag: 129466
  - 16
    - how to use a stored procedure of Access in VWD? Hi, I defined a query in Access. I created a AccessDataSource in an aspx page using Visual Web Developer. I specify Access, oledb etc ... and in the window "how do you like to retrieve data from db?" i choose "specify a cusstom sql or stored procedure". I go to next, but here, the radio input of "stored procedure" is not enabled. How can i specify a stored procedure? Thanks for help Phil Tag: Informix Drivers Tag: 129465
  - 17
    - A severe error occurred on the current command. sp_AddMergePublication This is a follow up to a posting I made which I can no longer update (http://groups.google.co.uk/group/microsoft.public.dotnet.framework.adonet/browse_thread/thread/272695bcd2e5e375/f2bbe776bafcb1e6#f2bbe776bafcb1e6) Issuing the command "sp_addmergepublication" via ADO.NET against a SQL Server 2000 SP3a instance results in the error "A severe error occurred on the current command. The results, if any, should be discarded". This is an issue with SQL Server SP3a and is resolved with SP4 Thanks Tag: Informix Drivers Tag: 129463
  - 18
    - Can't fill dataset whith varchar(350) Why is it that when I try to fill my dataset with a column of type varchar(350) I get a error message "Object reference not set to an instance of an object? I my application bring back only 250 characters in the column and it works. I can query all of the data into Excel using my ODBC, so what do I need to do with the ADO dataset object to get it to play along? Detailed Error Message: Server Error in '/BIC_WEB_TEST' Application. -------------------------------------------------------------------------------- Object reference not set to an instance of an object. Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code. Exception Details: System.NullReferenceException: Object reference not set to an instance of an object. Source Error: Line 30: baseconnection.ConnectionString = ConnectString Line 31: baseconnection.Open() Line 32: BICDataAdapter.Fill(BICDataSet, "screening") Line 33: End Sub Line 34: Source File: c:\inetpub\wwwroot\BIC_WEB_Test\ODBCTest.aspx.vb Line: 32 Stack Trace: [NullReferenceException: Object reference not set to an instance of an object.] System.Data.Common.Odbc32.SQLGetData(HandleRef StatementHandle, Int16 ColumnNumber, Int16 TargetType, HandleRef TargetValue, IntPtr BufferLength, IntPtr& StrLen_or_Ind) +0 System.Data.Odbc.OdbcDataReader.GetData(Int32 i, SQL_C sqlctype, Int32 cb) System.Data.Odbc.OdbcDataReader.internalGetString(Int32 i) System.Data.Odbc.OdbcDataReader.GetValue(Int32 i, TypeMap typemap) System.Data.Odbc.OdbcDataReader.GetValue(Int32 i) System.Data.Odbc.OdbcDataReader.GetValues(Object[] values) System.Data.Common.SchemaMapping.LoadDataRow(Boolean clearDataValues, Boolean acceptChanges) System.Data.Common.DbDataAdapter.FillLoadDataRow(SchemaMapping mapping) System.Data.Common.DbDataAdapter.FillFromReader(Object data, String srcTable, IDataReader dataReader, Int32 startRecord, Int32 maxRecords, DataColumn parentChapterColumn, Object parentChapterValue) System.Data.Common.DbDataAdapter.Fill(DataSet dataSet, String srcTable, IDataReader dataReader, Int32 startRecord, Int32 maxRecords) System.Data.Common.DbDataAdapter.FillFromCommand(Object data, Int32 startRecord, Int32 maxRecords, String srcTable, IDbCommand command, CommandBehavior behavior) System.Data.Common.DbDataAdapter.Fill(DataSet dataSet, Int32 startRecord, Int32 maxRecords, String srcTable, IDbCommand command, CommandBehavior behavior) System.Data.Common.DbDataAdapter.Fill(DataSet dataSet, String srcTable) BIC_WEB_TEST.ODBCTest.Page_Load(Object sender, EventArgs e) in c:\inetpub\wwwroot\BIC_WEB_Test\ODBCTest.aspx.vb:32 System.Web.UI.Control.OnLoad(EventArgs e) System.Web.UI.Control.LoadRecursive() System.Web.UI.Page.ProcessRequestMain() -------------------------------------------------------------------------------- Version Information: Microsoft .NET Framework Version:1.1.4322.2032; ASP.NET Version:1.1.4322.2032 Tag: Informix Drivers Tag: 129460
  - 19
    - newbie working with generated code (vb.net & visual studio 2003) Hi, I'm using VB.Net to create a windows form that will insert data from an xml file into an SQL Server Express database. As I'm new to VB.Net, i'm using the drag and drop method in Visual Studio 2003 for datasets, dataadapters etc. I open a file and insert photo details about an employee. The employee will have more than one photo/photo details. I have a function that opens the file, counts the amount of photos related to the employee in the xml file and then inserts into the database. <employee_detail> <lastname>smith</lastname> <firstname>tom</firstname> </employee_detail> <photo_detail> <filename>\my documents\my pictures\hpim0025.jpg</filename> <description>la;ksdfj</description> </photo_detail> <photo_detail> <filename>\my documents\my pictures\hpim0026.jpg</filename> <description>alkjf</description> </photo_detail> I have two tables in the database, employee_detail and photo_detail I'm using autogenerated primary keys in both tables (empid, photoid) I'm posting empid as a foreign key to photoid I use SELECT @@IDENTITY AS empid This works okay if i've just got one photo_detail element but i want to use more than one. I took the code from the "Windows Generate Region" and put it in my own function. After reading in the file into my DataSet, I count the amount of photo_detail elements and want to do that many inserts into the database. Am I allowed do the following: ********************************************************************* 'cut from "Windows Generated" and pasted into Private Sub Open_Click () function Me.SqlDataAdapter7.InsertCommand = Me.SqlInsertCommand7 Me.SqlDataAdapter7.SelectCommand = Me.SqlSelectCommand7 Me.SqlDataAdapter7.TableMappings.AddRange(New System.Data.Common.DataTableMapping() {New System.Data.Common.DataTableMapping("Table", "photo_detail", New System.Data.Common.DataColumnMapping() {New System.Data.Common.DataColumnMapping("photoid", "photoid"), New System.Data.Common.DataColumnMapping("empid", "empid"), New System.Data.Common.DataColumnMapping("filename", "filename"), New System.Data.Common.DataColumnMapping("description", "description")})}) Me.SqlSelectCommand7.CommandText = "SELECT photoid, empid, filename, description FROM photo_detail" Me.SqlSelectCommand7.Connection = Me.SqlConnection2 Me.SqlInsertCommand7.Parameters.Add(New System.Data.SqlClient.SqlParameter("@empid", System.Data.SqlDbType.Int, 4, "empid")) Me.SqlInsertCommand7.Parameters.Add(New System.Data.SqlClient.SqlParameter("@filename", System.Data.SqlDbType.VarChar, 2147483647, "filename")) Me.SqlInsertCommand7.Parameters.Add(New System.Data.SqlClient.SqlParameter("@description", System.Data.SqlDbType.VarChar, 2147483647, "description")) For st As Integer = 1 To val Step 1 Me.SqlInsertCommand7.CommandText = "INSERT INTO photo_detail(empid, filename, description) VALUES (@empid, " & _ "@filename, @description)" Me.SqlInsertCommand7.Connection = Me.SqlConnection2 Next I then use SqlDataAdapter7.Update(DataSet1) At the moment I'm just getting null in the foreign key empid field of the photo_detail table. Is it possible to use the code from "Windows Generated" elsewhere in the code ? Is this a completely stupid way of doing this ? I wanted to get a handle on .Net and thought that the drag and drop methods would be a quick way to ease into it, for what would seem a simple problem. Apologies if i've phrased this badly and many thanks in advance alan Tag: Informix Drivers Tag: 129446
  - 20
    - Connection remain open hi everybody I have an assembly that contain Datasets, this DataSets connect to one SQL server 2000 database and retrive information to be use for a web Service. The problem is that when the Datasets (TableDataAdapter) connect to the database this leave one connection open (for each user), I used the using and Dispose keyword for try to close this connection but nothing. Somebody know how to fix this. I am using Net 2.0 Best Regards Victor Hugo Pozo MCAD Net Tag: Informix Drivers Tag: 129432
  - 21
    - Datatable Datetime column remove zeroes I have added calculated column to datatable and expression looks like this: "somecolumn + datetimecolumn1" now, i do not want zeroes from datetime, just date. How to do it? Thanx. my DataTable is filled via adapter from SqlServer. Tag: Informix Drivers Tag: 129427
  - 22
    - datagridview Hi, How to put conbobox column or any other column into datagridview. please provide me with code in c#. Thanks in advanc -- mahimam_200 ----------------------------------------------------------------------- mahimam_2004's Profile: http://www.hightechtalks.com/m1 View this thread: http://www.hightechtalks.com/t37752 Tag: Informix Drivers Tag: 129425
  - 23
    - Executing MS Access Queries using ADO.NET I'm currently trying to run queries in an Access database using ADO.NET. My code works when executing a query whose name has no spaces but errors out if I try to run a query whose name has spaces in it. Example: When running a query named: "My Query" I receive an error message saying a query with the name "My" cannot be found. Is there any way to get around this problem? Thanks. Tag: Informix Drivers Tag: 129423
  - 24
    - Connection I mm developping a winforms application. I use a form do include, alter and delete data. I created a connection using the wizard. I would like that each user uses their own password to log in the SQL Server. I noticed the the connection string is in a file named APPNAME.EXE.CONFIG, and the XXXDataSet.Designer.cs file reads this connectionstring to log into the SQL. I would like to know if there is a way to change this connection string, at runtime, except changing the APPNAME.EXE.CONFIG file. Modifing the APPNAME.EXE.CONFIG works fine. The problem is that the password of the last user remain in the file. Tag: Informix Drivers Tag: 129421
  - 25
    - where clause I have an arbitrary number of values in the WHERE clause: select foo from bar where foobar = '1' and foobar = '2' ... and foobar = 'n-1' and foobar = 'n' What's the best way to program this? Thank you. Tag: Informix Drivers Tag: 129420

I am using Informix ODBC to connect to my POS database. It works fine
and shows all the tables in Excel but when I connect to the ODBC in
Visual Web Developer it says Test Successed but doesn't show any tables
or other information. Any help on getting Informix working with Visual
Web Developer. Thanks.

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Re: Informix Drivers by Frans

Frans
Thu Jun 08 02:53:53 CDT 2006

MasterChief wrote:

> I am using Informix ODBC to connect to my POS database. It works fine
> and shows all the tables in Excel but when I connect to the ODBC in
> Visual Web Developer it says Test Successed but doesn't show any
> tables or other information. Any help on getting Informix working
> with Visual Web Developer. Thanks.

Informix has a .NET provider, which is available from IBM if I'm not
mistaken. Also, be sure to update your OleDB driver, if possible, as
VS.NET uses oledb to connect to databases.

FB

--
------------------------------------------------------------------------
Lead developer of LLBLGen Pro, the productive O/R mapper for .NET
LLBLGen Pro website: http://www.llblgen.com
My .NET blog: http://weblogs.asp.net/fbouma
Microsoft MVP (C#)
------------------------------------------------------------------------

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