SQLHelper & DataGridView

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- Previous
  - 1
    - How to install .NET wrapper for old ADODB dll? Hello, does anyone know how to get a .NET wrapper assembly for old ADODB? In C:\Windows\assemby I do not have the assembly ADODB version 7.0.3300.0. So I have to install the assembly explicitely. Any ideas? Thanks in advance, Norbert Tag: SQLHelper & DataGridView Tag: 144420
  - 2
    - Data migration questions? I am about to develop code to migrate data from an old application to our new one. But first, I have a couple of questions: First, should I use a DataSet to bring the data down to the local machine that will run the code and execute the transformation logic from it. Considerations: The source database is about 100 Gb, and one of the tables includes an Image column. Second, will I get better performance by using Stored Procedures or Views. Thanks in advance, Mervin Williams Tag: SQLHelper & DataGridView Tag: 144417
  - 3
    - datacolumn datetime from UTC to Localtime Hi, VB.net 2005 CLR 2.0 I have a dataset with a datatable...there is one datetime field, and about 30 double fields. The datetime field is in UTC Time, but my client application needs to see this in localtime. The datetime field is accurate to the millisecond... The data source is a flatfile (not a db) [tabbed delimited], thus, I can't easily use the functionality of a server to return the gernerated column I need (utc to local time) I'm using the ms text driver, and Schema.ini to get the data into my datatable, and this works fine. Is there a way to add a datacolumn to my datatable (type datetime) that uses an expression and convert the utc time in the orig field to localtime in a new field? thanks, george jetson On the side, against sqlserver 2000 in ado.net, I can't seem to write a query against a view to return some rows when the timestamp has millisecond resolution (When I don't use this resolution, it works) i.e.: SELECT myField from myTable where myTime = '3/6/2008 9:30:00' WORKS i.e.: SELECT myField from myTable where myTime = '3/6/2008 9:30:00.723' DOES NOT WORK -- thanks in advance, georgejetson Tag: SQLHelper & DataGridView Tag: 144410
  - 4
    - Get Different values in gridview for Edit Btn (wrong CommandArgume I am at wits end trying to figure this out!! Basically i have a GridView in a UserControl. I assign the pk of the item bound to it via a LinkButton in a template. All works fine until i raise an event from the usercontrol, change the data from the calling aspx page and rebind it. By doing so, the LinkButton has the WRONG CommandArgument - to confuse things even further i tested by adding a button field that is bound to the same value -- the text output of this is correct, however the CommandArgument in the linkbutton is not - how is that even possible? Here is the buttonField and the LinkButton, both of which get diffrent values for pkContentPage <asp:ButtonField CommandName="Edit" DataTextField="pkContentPage" /> <asp:LinkButton ID="LinkButton1" runat="server" CausesValidation="false" CommandArgument='<%# DataBinder.Eval(Container.DataItem, "pkContentPage") %>' CommandName="Edit" Text="Edit" </asp:LinkButton> Any help would be greatly appreciated Tag: SQLHelper & DataGridView Tag: 144406
  - 5
    - Batch of Stored Procedures In our .Net 2.0 web service we need to insert/update data records into SQL Server 2005 that have been uploaded to us in XML documents. There could be anywhere from one to literally thousands of records in each uploaded transaction, and there are several dozen destination tables. Since performance is critical for this particular app, we were thinking of combining the stored procedure calls into configurable- sized batches using CommandType.Text and multiple concatenated EXEC statements, so we minimize database roundtrips as opposed to calling each SP individually in its own SqlCommand. Is this a good approach? One concern is that SQL Server would have to compile each and every batch since they will all be different, and the overhead involved in this could become significant. Is this really something to worry about, or not? Wouldn't a few batch compiles per transaction still be better than potentially thousands of roundtrips? Are there other problems with this approach? Of course we are planning to stress test to see how it actually responds, but I just wanted to get some opinions first in case someone has done this before and can give advice/recommendations/suggestions before we get too far into it. Thanks! MJ Tag: SQLHelper & DataGridView Tag: 144405
  - 6
    - ODBCCommandBuilder produces different UpdateCommand with Oracle using If I use a command that contains field name aliases, I get a different result for _cmdBldr.GetUpdateCommand().CommandText, depending on whether I am connected to SQL Server 2005 or Oracle 10g. Here is the code in question: string _sqlString = "SELECT ID, PLANGROUP AS PG, DESC_R FROM TABLEA WHERE ID = 100002"; OdbcConnection _dc = new OdbcConnection(); _dc.ConnectionString = "<connectionstring>"; _dc.Open(); OdbcDataAdapter _da = new OdbcDataAdapter(_sqlString, _dc); DataTable _dt = new DataTable(); _da.Fill(_dt); _dt.Rows[0].BeginEdit(); _dt.Rows[0]["DESC_R"] = "ABC"; _dt.Rows[0].EndEdit(); OdbcCommandBuilder _cmdBldr = new OdbcCommandBuilder(_da); MessageBox.Show(_cmdBldr.GetUpdateCommand().CommandText); try { _da.Update(_dt); } catch(Exception ex) { } When I run this for a SQL Server connection, the _da.Update(_dt); command executes without an exception and _cmdBldr.GetUpdateCommand().CommandText returns: "UPDATE TABLEA SET ID = ?, PLANGROUP = ?, DESC_R = ? WHERE ((ID = ?) AND ((? = 1 AND PLANGROUP IS NULL) OR (PLANGROUP = ?)) AND ((? = 1 AND DESC_R IS NULL) OR (DESC_R = ?)))" When I run this for an Oracle connection the _da.Update(_dt); command generates an exception: "ERROR [42S22] [Oracle][ODBC][Ora]ORA-00904: "PG": invalid identifier" and _cmdBldr.GetUpdateCommand().CommandText returns: "UPDATE TABLEA SET ID = ?, PG = ?, DESC_R = ? WHERE ((ID = ?) AND ((? = 1 AND PG IS NULL) OR (PG = ?)) AND ((? = 1 AND DESC_R IS NULL) OR (DESC_R = ?)))" Note that in SQL Server, the original field name "PLANGROUP" is used in the UpdateCommand. In Oracle, the field name alias "PG" is used. Is there a way to force the command builder to create an update command with the orginal field name when using Oracle? Is there another approach I should be using, other than always creating my own update command from scratch for Oracle? Thanks. Tag: SQLHelper & DataGridView Tag: 144403
  - 7
    - How to connect to a database through code? Beginner question: Can anyone point me in the right direction for learning (url's, books, etc.) how to connect to an sql or access database through code rather than using typed datasets? What I am most interested in is sample code that would connect to say the Northwind database and allow a user to insert, delete, update data from the tables. I want the user to first select the location of the database he wants to connect to, then to load my datagridview with the datasource/ tableadapter etc. Thanks for all responses. Peter Tag: SQLHelper & DataGridView Tag: 144401
  - 8
    - Transactions in ADO.NET or SQL SP What is the best approach? I've created a .NET 2.0 windows service which queries & updates data in SQL using Stored Procedures. Note, this windows service spawns a few worker threads which query/update the database - thus ending up with multiple simultaneous database connections (queries/updates). Currently I've implemented transactions in the SQL SP (also using XACT_ABORT, etc...), as WELL as the ADO.NET layer. However, I've been told that its best to implement it just at the ADO.NET layer. The more I think of this, the more sense it makes. Surely there's a best pratice for this! Tag: SQLHelper & DataGridView Tag: 144399
  - 9
    - Scope_Identity() Dear, how can I get the scope_identity after inserting records into the database <System.ComponentModel.DataObjectMethod(ComponentModel.DataObjectMethodType.Select, True)> _ Public Function Insertdata(@Name, @firstname) as integer return adapter.insert(@name,@firstname) end function The return statement only returns 1 incase the insert was successful........this while I'm interested to get the last Id from this insert. your help is most appreciated!! -- Best regards Nicole Tag: SQLHelper & DataGridView Tag: 144382
  - 10
    - Overriding dataset connection Hi I have a windows form app with one master table and several details (grids). As I am filling both the master and details using vs 2005 generated dataset and data adapters, there are multiple connection open/close during the whole operation (one connection open/close per adapter fill). Is there a way to override the vs generated connection management code to open the connection only once at start, do all fills and then close the connection at the end, to speed up the whole fill process? As dumping the vs 2008 dataset altogether will involve too much code writing, I am reluctant to let go of it and would prefer to only override the connection management if I can. Many Thanks Regards Tag: SQLHelper & DataGridView Tag: 144363
  - 11
    - ado.net data access performance Hi I am using a strongly typed dataset created by vs 2008. I have added a query to select next record to the data adapter as below; SELECT TOP 1 <field list> FROM MyTable WHERE (ID > ?) ORDER BY ID ? is replaced by the ID of the current record. My problem is when I fill using this query there is a noticeable about half a second delay before data is retrieved. Is there any way to improve the performance of this query? Thanks Regards Tag: SQLHelper & DataGridView Tag: 144357
  - 12
    - Is getting a column by name slower then ordinal? If I am doing a very large loop in a data reader say 20,000 rows being read in... now I need to read data so I am doing the reader.Get[Type](reader.GetOrdinal("[columnname]"))... which seems like it'd be slow doing that x number of times per row... is it better to use the ordinal by itself? does looking up an ordinal have any major performance impact? should I look them up once and cache them in variables? what do you guys thinks? thanks! Tag: SQLHelper & DataGridView Tag: 144351
  - 13
    - sqlBulkCopy Hi. I have some VS 2005 VB.NET code that uses the writeToServer method of a sqlBulkCopy object to write records in a dataTable to the SQL server. The code works fine against our SQL Server 2000 database, but we get a 'login failed' error against 2005. The DBA says the account on 2005 has dbOwner permissions and bulk administrator permissions. I'm not setting any of the copyOptions of the writeToServer method. Any ideas for what to try to get this to work on our 2005 server? Thanks, -Beth Tag: SQLHelper & DataGridView Tag: 144348
  - 14
    - DataTextFormatField: {0:d/60} ??? Hi over there, I've got a DataBoundField in a GridView which name is (both gridview-column and the column in the database) "TimeInMinutes". And I want another column, that displays the hours, means the same value as in the TimeInMinutes-Column divided through 60. I tried to achieve that with the DataTextFormat field, but I've got no luck. Is that possible anyway, or do I have to do that by manual by code? DataTextField: TimeInMinutes DataTextFormatField: {0:d/60} ??? How can I achieve that I've got another column in my grid view, that is not existent in the database, but visible in the gridview, with the value of the database-column "TimeInMinutes" displayed in hours? any help appreciated, cheers, Markus Kofler Tag: SQLHelper & DataGridView Tag: 144346
  - 15
    - 2008 Express Edition missing Data drivers? I just started doing some basic exercises with Visual Basic 2008 Express Edition (Version 9.0.21022.8 RTM, Microsoft .NET Framework Version 3.5) and I do not seem to have what I would call routine data drivers installed. Initially, I only want to connect to a Northwinds db in my local SQL Server 2000 instance but the only drivers available are Microsoft Access DataBase file, Microsoft Sql Server Compact 3.5, and Microsoft SQL Server Database File. I don't need Access and the other two don't seem to create db connections in a manner I am familiar with. What am I missing and how do I add it? Or is it impossible to do 'normal' database connections in the Express version? Tag: SQLHelper & DataGridView Tag: 144345
  - 16
    - Wierd error on data set Occassionaly (and its rare, but i think there are repo steps to this, i just cant completely determin them, but here is what I figured out so far) I have a data set (say its called DS) I have three tables... call them people, peoplejunitem and item... peoplejunitem is a many to many junction table between people and items... well say I load one set of information about a person into the data set's tables... ok this person has items in the junction... say I alter the information in the junction but dont commit it to the database... now I go and load another person... but while loading the next person it clears the information in the junction table and the person table and replaces it with the 2nd person... ok I make changes and push the data back to the database... and boom error... zero rows updated when 1 was expected to be... well that one row updates was from the FIRST! person... even though I did a ds.table("PersonJunItems").rows.clear somehow it still thinks it has rows to push! why?! this happens randomly to me! I tested out the T-SQL statements like crazy and they are not at fault, they are return the correct response, but while watching the SQL Server profiler I saw the commands to update the pervious person going through on person 2 to the database... any ideas how to stop this or fix the problem? or anyone ever see anything similar to this? thanks! Tag: SQLHelper & DataGridView Tag: 144342
  - 17
    - Open file suddenly stops existing?! A file is successfully opened, partly read, and not closed, but suddenly it stops existing? How does Ado.Net accomplish this result? This seems to be a 100% repro on one file but 100% no problem on a different file. Again how does Ado.Net do this? // Sample dirName is C:\myDir and tableName is myFile1.csv or myFile2.csv. OleDbConnection connection = new OleDbConnection( "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + dirName + ";Extended Properties='Text;Extensions=asc,csv,tab,txt;" + "HDR=Yes;FMT=Delimited'"); connection.Open(); OleDbDataAdapter dataAdapter = new OleDbDataAdapter( "SELECT * FROM [" + tableName + "]", connection); DataTable dataTable = new DataTable(tableName); dataAdapter.FillSchema(dataTable, SchemaType.Source); DataColumnCollection dataColumns = dataTable.Columns; int fileColumnCount = dataColumns.Count; foreach (DataColumn dataColumn in dataColumns) { dataColumn.DataType = typeof(string); } // This works up to here. FillSchema worked. // The next call works on myFile1.csv but fails on myFile2.csv. dataAdapter.Fill(dataTable); // Exception: file does not exist. Wtf? Tag: SQLHelper & DataGridView Tag: 144338
  - 18
    - Returning the id of an inserted record I am writing an ASP.NET application, and am forced to use Access as my database. I need a way to return the id (which is an AutoNumber field in the table I am inserting into) of a record when I insert it. In SQL Server, I am able to use a statement like the following: INSERT INTO tablename (fieldnames) OUTPUT inserted.id VALUES(valuestoinsert) Take note of the OUTPUT inserted.id part of this statement. This returns the value of the field named 'id' for the record that was just inserted. Unfortunately, this technique does not work in Access. Is there any way to retrieve the id of the record that was just inserted when using Access? Any help would be appreciated. Thanks. -- Nathan Sokalski njsokalski@hotmail.com http://www.nathansokalski.com/ Tag: SQLHelper & DataGridView Tag: 144336
  - 19
    - Logging exceptions to Database using Enterprise Library 3.1 Can somebody direct me to an example of logging exceptions to SQL Server Database using Enterprise Library 3.1 Exception Handling block. I created database listener. But it's doing nothing. Thank You Reddy Tag: SQLHelper & DataGridView Tag: 144331
  - 20
    - How to solve DataSet Designer SQL errors? Hi there, I have writing easy to moderate SQL in the DataSet Designer and Query Builder, using a Jet 4.0 connection to an Access 2003 DB. I am running VB.NET 2005 sp1. As soon as I try to do anything more than the most trivial SQL (e.g. simple JOINs, more than 1 parameter other than in the WHERE clause, etc.), the Designer/Query Builder balks giving SQL parsing error messages. This means that the Fill, GetData() is not set up properly and compiler errors prevent me from running my app. This is despite the fact that the SQL is perfectly fine (it runs in Access) and in some situations it is possible to 'trick' the Designer (ref. link below). Aside from the critical issue of my app not running, I am not able to leverage strongly typed DataSets, and all the useful commensurate objects (e.g. DataTable, data row). I have been promoting this approach within our development teams, but all these problems make significantly reduce confidence in using these objects and the Designer. Nor it is sensible to use a blend of approaches in my app (e.g. trivial SQL through strongly-typed DataSets and the rest explicitly written in code) from a software design/maintenance perspective. If this can't be solved, I'll look at dropping use of the Designer and going back to hand-coded SQL. Any and all feedback that provides solutions to this problem (e.g. is there an update/patch to the Designer?) would be appreciated. Thanks in advance, David Newsgroup posting "Dataset designer and complex Stored procedure" on microsoft.public.dotnet.framework.adonet http://groups.google.ca/group/microsoft.public.dotnet.framework.adonet/browse_thread/thread/9c0a1938b49329ea/68917fe53b75058c?lnk=st&q=%22dataset+designer%22+sql+error#68917fe53b75058c Tag: SQLHelper & DataGridView Tag: 144304
  - 21
    - OleDbCommandBuilder insert query will not work? dataset to Access I am trying to take a very strangely delimited text file and put it into access. So far I was able to get the text file into a dataset and figured from there I could get it into access. I am trying to use the code below but the insert query(oledbcommandbuilder) just will not work. I am working with a blank access database and I am able to get the table and the field names in the database(with a primary key just set ot the first row). I just cannot get the rest of the data. I get an error that there is incorrect syntax in the insert query. Can someone please help! I've been all over the site reading a buch of different things and tried to just write inserts for each row but cannot get that to work either. Thank you! DataSet result = new DataSet(); ...get delimited file into dataset... OleDbConnection DB = new OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0; Data Source=c:\\Conversions\\" + agencyid + "\\" + agencyid + ".mdb"); OleDbDataAdapter DataAdapter = new OleDbDataAdapter(); DataAdapter.SelectCommand = new OleDbCommand("SELECT * FROM " + TableName, DB); OleDbCommandBuilder CmdBuilder = new OleDbCommandBuilder(DataAdapter); DB.Open(); DataAdapter.FillSchema(result, SchemaType.Source, TableName); DataAdapter.InsertCommand = CmdBuilder.GetInsertCommand(); //I added the line above because the insert query did not show in the data adapter. //It now has: insert into tablename(fieldname1,fieldname2...) Values (?,?,?...) DataAdapter.Fill(result, TableName); DataAdapter.Update(result, TableName);//Fails here on the insert query syntax DB.Close(); Tag: SQLHelper & DataGridView Tag: 144295
  - 22
    - timeout error Hi, I've a method in my web service..which makes a call to db and sends back a dataset.. the query takes 2 mins to fetch the results..by that time i'm seeing a 'operation has timed out error' on my screen.. is there any to get rid of this error? Tag: SQLHelper & DataGridView Tag: 144291
  - 23
    - Problem with AdomdCommand with passing DataTable with DBNull in some cells The following code would fail, with the error: "The '' string cannot be converted to the double type." when trainTable contains rows with DBNull in some of the columns. How can I pass NULL to MSAS? using (AdomdCommand comm = connAS.CreateCommand()) { comm.CommandText = "INSERT INTO MINING MODEL [MyModel] ([statbbrev],[lpop],[ldem],[lemp]) @TrainTable"; comm.Parameters.Add("TrainTable", trainTable); comm.ExecuteNonQuery(); } Tag: SQLHelper & DataGridView Tag: 144284
  - 24
    - Problem with AdomdCommand when Passing DataTable with DBNull's The following code would fail, with the error: "The '' string cannot be converted to the double type." when trainTable contains rows with DBNull in some of the columns. How can I pass NULL to MSAS? using (AdomdCommand comm = connAS.CreateCommand()) { comm.CommandText = "INSERT INTO MINING MODEL [MyModel] ([statbbrev],[lpop],[ldem],[lemp]) @TrainTable"; comm.Parameters.Add("TrainTable", trainTable); comm.ExecuteNonQuery(); } Tag: SQLHelper & DataGridView Tag: 144283
  - 25
    - ORA-01406: fetched column value was truncated Using data reader against one of my Oracle tables is crashing with following error: System.Data.OracleClient.OracleException: ORA-01406: fetched column value was truncated. This happens with Microsoft ADO driver to Oracle. Oracle ADO driver works just fine. Error happens only with some records (there are some pretty large columns in a table), but not other. I wonder if anyone has any insights to this issue â?? we donâ??t want to compile Oracle drivers into our base applications, because most of our customers are using SQL Server. Thanks in advance. Tag: SQLHelper & DataGridView Tag: 144282
- Next
  - 1
    - Need some advice on my Deployment Pkg Hello. Using XP Pro w/SP4 and VS 2003. I wrote my program with the connection string and the path for loading the Maps as follows: C:\MVB.NDbProJim\Ch7\ROE6AllRecords2\Maps. The Maps sub-directory containes all 116 Maps of the Lots and also the ROE6.mdb database. But when I deplay this app to my other PC it gets an error that this path is invalid so it cannot even load the database. Since the MSI installs this package to C:\Program Files\Microsoft\ROE6 I decided to have the Maps subdirectory relocated to this Path. I had to change (in my program) the Connection String and all the 116 paths for it to load the Maps but it now works just fine on the other PC. I must have missed something because it is unreasonable to have to keep the support files at the same location on my PC as the installer is going to use on the target PC. Any words of wisdom to get me straightened out? TIA, Jim Tag: SQLHelper & DataGridView Tag: 144279
  - 2
    - problem with excel hi, i'm facing a strange problem.. In my requirement , I'm suppose to load the data from datagrid into excel file. make the required changes in the file and load the file back into the datagrid. i'm able to export to excel but after i make changes in the excel and load it into grid, my changes are not visible..i'm getting null values.. i've datetime columns,decimal columns in my file...The values are visible in the file but when i load into grid..i'm seeing blanks spaces.. has anyone encountered such problem.? How can load from excel to datagrid Tag: SQLHelper & DataGridView Tag: 144277
  - 3
    - LINQ passing Array for a parameter I have a web page where a user can select multiple items for use in a select statement. SELECT columns FROM table WHERE ID in (1,2,3). Since its a web application I use a stored procedure to get the results. Currently my sproc GetResults (@EventIdList varChar(@256)) uses a table value function that parses the item list and returns a table. I use this method because I don't do dynamic SQL in sprocs and sprocs can't take arrays. Select columns from MyTable INNER JOIN dbo.ParseIntToTable(@EventIdList,',') evn on MyTable.EventTypeID = evn.ColumnValue ALTER FUNCTION [dbo].[ParseIntToTable] ( @StringList varchar(8000), @Delimiter char(1) ) RETURNS @TempTable table ( ColumnValue int ) AS BEGIN DECLARE @StringValue varchar(1000) -- value taken off list DECLARE @Pos int -- position of delimiter SET @StringList = LTRIM(RTRIM(@StringList)) IF RIGHT(@StringList,1) <> @Delimiter SET @StringList = @StringList + @Delimiter SET @Pos = CHARINDEX(@Delimiter, @StringList, 1) IF REPLACE(@StringList, @Delimiter, '') <> '' BEGIN WHILE @Pos > 0 BEGIN SET @StringValue = LTRIM(RTRIM(LEFT(@StringList, @Pos - 1))) IF @StringValue <> '' BEGIN INSERT INTO @TempTable (ColumnValue) VALUES (CAST(@StringValue AS int)) END SET @StringList = RIGHT(@StringList, LEN(@StringList) - @Pos) SET @Pos = CHARINDEX(@Delimiter, @StringList, 1) END END RETURN In LINQ how do you write a query that takes an array for a parameter. ( select columns from table where ID IN (1,2,3) ). The query result will be used in a GridView and needs to support paging and sorting. thanks, Tag: SQLHelper & DataGridView Tag: 144275
  - 4
    - OracleDataReader Returns No Records With Nested SQL Hello All, Can anyone tell why one sql statement works with the data reader but not the other. To test, I uncomment the string I need. Dim QueryString As String ***This string does not work 'QueryString = "SELECT * FROM print_server WHERE LS = (SELECT LS FROM vw_turboinfo WHERE tsn = '080226086')" ***This string does work, and the result returned does exist in print_server 'QueryString = "SELECT LS FROM vw_turboinfo WHERE tsn = '080226086'" ***This string does work 'QueryString = "SELECT * FROM print_server WHERE LS = 4042390" Dim Command As New OracleCommand(QueryString, oraCon) Command.CommandType = CommandType.Text ***I have copied the CommandText into TOAD for Oracle for each of the 3 ***strings, and each is valid and returns the correct information. Debug.Print(Command.CommandText) Dim reader As OracleDataReader Try reader = Command.ExecuteReader While reader.Read Debug.Print(reader.Item(1)).ToString End While Catch ex As Exception MsgBox(ex.Message) Finally End Try Tag: SQLHelper & DataGridView Tag: 144267
  - 5
    - IIS ASP.NET 2.0 Not creating a connection pool nor re-using I need some help! I have a webapp in ASP.NET 2 running on 2003 R2 that doesn't seem to want to bring up a connection pool. When I run a trace on the DB server I can see Audit Logoff and Audit Logon between query batches, which leads me to believe that this is occurring. This is a replacement platform for our current live systems, so I have just tried to build everything as similarly as possible throughout. The main difference is that the DB server is now SQL2005 SP2 whereas before it was SQL2000. I haven't read anything indicating that this would be the cause, but I am very open to ideas. The connection string I am using is: Application Name='Live';pooling=true;Min Pool Size=1;Max Pool Size=1000;database=DB1;User ID=USER ;Password=PASSWORD;Server=live- db1; I cannot find any way to verify information on connection pooling working, other than by using SP_WHO - which does appear to show an idle connection or two from the webapp, but like I say, I can see the connections being torn down and back up every batch from the profiler trace. The reason I'm investigating this is that the application is serving pages incredibly slowly when they have to hit the database, but I've tried running the query batches directly through MSMS on both the DB server and App servers, and they are very fast - much faster than when run via .NET. This connection latancy is the only thing I can put it down to at the moment. I'd welcome any insight. Jon Tag: SQLHelper & DataGridView Tag: 144266
  - 6
    - datagrid to excel Hi, I;ve a requirement wherein the need to export the data from grid to excel file using .net 1.1.. While I do the export to file, sfew columns in teh excel file should be locked, in the sense..use shouldn't be able to edit the values in those columns... is this possible thru C#? any samples Tag: SQLHelper & DataGridView Tag: 144263
  - 7
    - Can't add a new row to a database Why won't this code add a row to my database? It runs as expected but when I look in the SQL database using SQL Server Management Studio the table is empty. DataRow newRow = this.dsHealthClub.NotInHouse.NewRow(); newRow["Name"] = dsEmployees.Employees.Rows[0].ItemArray.GetValue(0); newRow["DateOut"] = DateTime.Now; newRow["Comments"] = ""; newRow["Badge"] = visitorID; this.dsHealthClub.NotInHouse.Rows.Add(newRow); Tag: SQLHelper & DataGridView Tag: 144261
  - 8
    - Database Table and XML Synchroniazation Hello to all, Is it possible to sychronize a Database Table and an XML file. To be more specific, I want to read data from a database, convert them to XML, make changes to the XML and then update the Database table from the XML file. Is it possible? Regards Dimitris Tag: SQLHelper & DataGridView Tag: 144260
  - 9
    - a problem about connect to access with ODBC System.Data.Odbc.OdbcConnection conn = new System.Data.Odbc.OdbcConnection(@"Driver={Microsoft Access Driver(*.mdb)};Dbq=C:\abc.mdb;Uid=Admin;Pwd="); when invoke conn.Open(); the program throw an OdbcException ERROR [IM002] [Microsoft][ODBC Driver Manager] Data source name not found and no default driver specified Tag: SQLHelper & DataGridView Tag: 144252
  - 10
    - Must delcare the scalar variable I am running an Update routine that calls a function. It appears that the function never executes because I receive: Must Declare The Scalar Variable @Country. Code: Dim newCustomer As New Customer newCustomer.CustomerID = customer.CustomerID Me.PutCustomerData(newCustomer) Try If Not CustomerDB.UpdateVendor(customer, newCustomer) Then MessageBox.Show("Another user has updated or deleted that customer.", _ "Database Error") Me.DialogResult = Windows.Forms.DialogResult.Retry Else customer = newCustomer Me.DialogResult = Windows.Forms.DialogResult.OK End If Catch ex As Exception MessageBox.Show(ex.Message, ex.GetType.ToString) End Try The only time @Country is used is in a Insert function. In the Update fuction, I use @NewCountry and @OldCountry, so I am not sure why this is happening. Please help. Tag: SQLHelper & DataGridView Tag: 144251
  - 11
    - Incresase the Excution Time? Hi EveryBod: I have an object cmd as SqlCommand object and and I face problem with safe large data by using this object there is an errore appear tell me that the excution time out. Sombody can tell me how can I increase the Excution time? I am using SQL server 2005 any help will be appreciated regard's Husam Tag: SQLHelper & DataGridView Tag: 144250
  - 12
    - DataAdapter Solution with support for paging? Hello, is there are ready component (maybe an data adapter) existing which has advanced features like paging (with server cursors) but still allows merging? Thank you, Frank Tag: SQLHelper & DataGridView Tag: 144249
  - 13
    - Attempt on SqlConnection.BeginOpen I have a need for a SqlConnection.Open that times out in an predictable matter (i.e. if the server does not answer, I do not have to wait for TCP or NIC timeouts to find out). The "Connection Timeout" in the connectionstring will not help, as this only applies to the connection to the SQL Server, not to the actual TCP port. Therefore I have had a crack at it myself, and would appreciate any constructive comments on the implementation. The method BeginOpen(SqlConnection,int) will take an SqlConnection and a timeout (in ms), and will try to open it. If it for any reason cannot, it will return within the specified timeout. If there is an exception in connection before the timeout occurs, it will throw that, otherwise it will throw a custom Exception. There is an 4-5 ms overhead by doing this, but I'm willing to sacrifice this for a predictable timeout. Any comments appreciated... private void BeginOpen(SqlConnection connection, int msTimeout) { // Start timeout timer here, it includes all work done in this method. // This assures that this method uses no more than msTimeout to complete DateTime connectionAbortTime = DateTime.Now.AddMilliseconds(msTimeout); // Transfer ambient transaction to thread Transaction currentTransaction = Transaction.Current; // Save the thread exception (if any) Exception threadException = null; // Signifies that we could connect and communicate with the database bool connectSuccess = false; Thread workerThread = new Thread( delegate() { try { Transaction.Current = currentTransaction; connection.Open(); // This might hang indefinatly connection.ChangeDatabase(connection.Database); connectSuccess = true; } catch (Exception ex) { threadException = ex; } } ); workerThread.IsBackground = true; // Make sure application tears it down when it exits workerThread.Name = "SqlConnection.BeginOpen"; // Start work and wait for the thread to finish or it times out workerThread.Start(); while (connectionAbortTime > DateTime.Now) if (workerThread.Join(1)) // Check if thread is finished break; // For some reason, the connection could not be opened, throw an exception if (!connectSuccess) { if (threadException != null) // Encountered an exception before timeout throw threadException; else // Either timed out OR did not have time to save exception in threadException throw new SqlConnectionTimeoutException("Could not connect to server within timeout"); } } public class SqlConnectionTimeoutException : Exception { public SqlConnectionTimeoutException(string message) : base(message) {} } Tag: SQLHelper & DataGridView Tag: 144248
  - 14
    - Disabling EnforceConstraints Hi Is there a way to disable EnforceConstraints on a dataset? I have this statement ds.EnforceConstraints = true in MyDataSet.Designer.vb but I am reluctant to set it to false as the designer may overwrite the code. I only wish to do it temporarily to speed up fill operations. Thanks Regards Tag: SQLHelper & DataGridView Tag: 144239
  - 15
    - Filling a DataTable causing RowState to change in another table I have 2 separate DataTables in a DataSet. These tables are in no way related to one anohter with Relations. When I Fill one table, it causes a row's RowState in the other table to change from Unchanged to Modified. In the absence of editing the row! Can anyone think of ways to figure out what might be causing this? -- Michael Tag: SQLHelper & DataGridView Tag: 144234
  - 16
    - ADO.NET query execution much slower than SQL Management Studio I have a stored procedure that when called from SQL 2005 Management Studio takes less than one second to execute. The same SP, when called from .NET code takes about 13 seconds. I am using a SqlCommand object with CommandType set to StoredProcedure and I am passing arguments through the parameters collection. I have tried using a SqlDataReader and a DataAdapter to retrieve the data, but both are equally slow. From stepping thru the debugger, I know that the specific statement that takes a long time to execute is either reader.ExecuteReader() or dataAdapter.Fill(dataTable), equivalently depending on the method I tried. I did a trace in the Profiler, and got nearly identical result for either method of .NET SqlClient Data Provider. Here is an example: EventClass: RPC:Completed CPU: 13390 Reads: 559475 Writes: 0 Duration: 13496 Binary Data: (a long hex value) When I copied the TextData (SQL Statement being executed) from Profiler into SQL Management Studio, I get the following trace: EventClass: SQL:BatchCompleted CPU: 437 Reads: 9998 Writes: 0 Duration: 440 BinaryData: (empty) (Immediately prior to this there is a corresponding SQL:BatchStarting trace, with empty CPU, Reads, Writes, and Duration columns.) What could explain the orders of magnitude difference in reads and duration? Is the problem due to RPC? What about the binary data? I have tried using the overload of ExecuteReader(CommandBehavior.SingleResult) with no improvement. What can I try to improve it? Thanks, Dustin Tag: SQLHelper & DataGridView Tag: 144229
  - 17
    - Server Browser accessible from code I'm wanting to implement a tree view in C# that lists user selected servers/databases/fields/etc. I would like to be able to pull up that standard form that I see that allows someone to search for servers, then name the database, then "Test Connection", etc. Is this accessible from within run-time code? Tag: SQLHelper & DataGridView Tag: 144225
  - 18
    - load flat file into datatable Anyone, I'm looking for a way to load flat files into a datatable in vb.net (2005) My flat files are tabbed delimited files with the field names on the first row I could dump the data into a sqlserver via DTS and then query against a table, but I'd like to figure out how to go directly from flat file to datatable/dataset. Any examples out there? -- thanks in advance, georgejetson Tag: SQLHelper & DataGridView Tag: 144224
  - 19
    - Initial opening speed Hi My vb.net seems to be slow on initial loading. My clients are not impressed as they had used the ms access version of the app previously and think that the old app is faster in loading. I understand .net apps need to compile themselves before execution. Is there any way I can speed up this process or in general do anything else to speed up initial loading of the vb.net app? Thanks Regards Tag: SQLHelper & DataGridView Tag: 144221
  - 20
    - OleDB locks excel file Greetings, I use OleDB from my c# application to populate an excel sheet. I open the connection in a using clause (which automatically close the connection after exit) and the excel file is created. However, I am not able to view excel file before I exit the application. It seems that there is a lock on the excel file and that the transaction is not fully completed before application close (or sometimes when I open and close other parts of the application). Does anyone know a way to force Ole Db to release all locks on the file? connectionstring setting..? ConnectionString: Provider=Microsoft.Jet.OLEDB.4.0;Data Source=\"c:\\temp\ \myExcelFile.xls\";Extended Properties=\"Excel 8.0;OLE DB Services=0;HDR=Yes;Mode = 3;\""; Tried Services 0/-4 Example code: using(OleDbConnection connection = new OleDbConnection(connectionString.ToString())) { connection.Open(); transaction = connection.BeginTransaction(IsolationLevel.ReadUncommitted); CreateInspectionSheet(inspection, connection, transaction); transaction.Commit(); // does not seem to force data written to file } transaction.Dispose(); Any help highly appreciated! -thomas Tag: SQLHelper & DataGridView Tag: 144220
  - 21
    - Populating data set on background thread Hi I have a master data set. I need to populate a copy of this data set in the background (via background thread?) and once filled to replace master data set with the newly filled dataset. Is there a code example of this that can see? Thanks Regards Tag: SQLHelper & DataGridView Tag: 144214
  - 22
    - How import data from SQL Server? What's the best way to import all the tables (w/data) from an SQL Server database (in production) to my SQL Express database (on my local dev machine)? Tag: SQLHelper & DataGridView Tag: 144211
  - 23
    - Creation of table in database based upon ado.net database Part of the application which I am building must support either Access or Sql Server Databases. The code to generate the databases via sql scripts is done. However, I have a set of tables (they will all have the same columns, but have different results since they are doing seperate calculations/modeling that is being written to each table) that need to be created based upon selections done by the user. It is easy to create an in memory table that holds this information and to clone it to hold the results of each individual model. The problem is how do I take this and create a set of tables with that structure within either of the two database types. If I can get a clue on how to take a single in memory table and to then build either an Access or Sql Server table in an already existing database, I can work out the rest. Any help would be appreciated, since I am stuck at not having any good solution for this. Tag: SQLHelper & DataGridView Tag: 144206
  - 24
    - Database access spped issue Hi I have a terrible scenario. I had an ms access front end/back end app that searched on partial strings. I have coded the app in .net (access backend) and am using the below code to search on partial strings;. daCompanyLocate.SelectCommand = selCompanyLocate selCompanyLocate.CommandText = "SELECT Company, [Company 2] as Parent, Type, Tel, [Address 1] as Address, [Post Code], Town, ID " & _ "FROM Clients " & _ "ORDER BY Company" ds.CompanyLocate.Clear() daCompanyLocate.Fill(ds.CompanyLocate) dv = New DataView(ds.CompanyLocate) dv.RowFilter = "Company like '*" & Me.txtLocate.Text & "*' OR [Parent] like '*" & Me.txtLocate.Text & "*'" grdLocate.DataSource = dv Unfortunately client is not impressed with the speed of this ado.net/vb.net version compared to the same feature in access. Could someone please advise me if I can speed this up somehow? Thanks Regards Tag: SQLHelper & DataGridView Tag: 144203
  - 25
    - re-order a dataset Hi, I have a dataset (vb.Net 1.1) that I need to go through and re-order based on the data. I'm wondering if there is a nice relatively automated way to do this, but I kind of doubt it. There is not currently a single field to use in a DataView's order by parameter. The data has two fields that decide the order, node_id and parent_id. The parent_id is the node_id of the row above. If there is no corresponding row to the parent_id then we have row 0. I've messed around a little with looping through the table and I haven't found any elegant (or even not ugly) solutions. Two options that come to mind are cloning the table and copying the rows in order, probably making multiple passes. Another would be to add an "order" column and populating that as I loop through and then use a dataview to order the rows according to that field. Anyone got any better solutions? Could I create a recursive DataRelation to do this? I'd love to hear any ideas! Thanks! Matt Tag: SQLHelper & DataGridView Tag: 144202

I am trying to populate a MS DataGridView with Stored Procedure using SQLHelper. I am connecting to a FireBird database. I'm also using SQLHelper for FireBird. For all intents and purposes the code is the same for SQL Server.

The DataSource property is set to use the SP and I have changed the ObjectType to int to reflect the ParameterType. When I supply the parameter and PreviewData, the SP executes as expected. However, when I run the program the DataGridView displays with the correct column header text but the data is missing.

Sample code follows:

FbParameter[] rsParms = new FbParameter[3];

// @ID Input Parameter
rsParms[0] = new FbParameter("@ID", FbDbType.Integer, 0);
rsParms[0].Direction = ParameterDirection.Input;
rsParms[0].Value = inComingID; //int value supplied by the user via the form

// @NAME Output Parameter
rsParms[1] = new FbParameter("@NAME", FbDbType.Integer);
rsParms[1].Direction = ParameterDirection.Output;

// @ADDRESS Output Parameter
rsParms[2] = new FbParameter("@ADDRESS", FbDbType.Integer);
rsParms[2].Direction = ParameterDirection.Output;

SqlHelper.ExecuteReader(Properties.Settings.Default.dbConnection, CommandType.StoredProcedure, "SP_CONTACTS",rsParms);

I am clueless. All help greatly appreciated.

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