How to Bind ListBox for Windows Form(VB.NET)

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  - 1
    - DataView Filter Not working I am using the following code to filter a DataView and then put the dataview back into a DataSet. I've verified that strFilter contains 683 values. The dataview initially has 1306 records before the filter. However, the resulting dataset that comes out has all 1306 rows. How is this possible since I'm filtering on 683 unique values? I'd appreciate any help -Tim //create a dataview for the dataset //DataTable oDT = oDS.Tables["Results"]; DataView oDV = new DataView(oDS.Tables["Results"]); DataTable oDT = new DataTable(); try { if(strFilter != "") { //filter the dataview with the previous work ids oDV.RowFilter = "WorkID IN (" + strFilter + ")"; } } catch(Exception err) { Response.Write("Error: " + err.Message.ToString()); } //Convert the DataView back to a DataSet oDT = oDV.Table.Copy(); oDS = new DataSet(oDV.Table.TableName); oDS.Tables.Add(oDT); Tag: How to Bind ListBox for Windows Form(VB.NET) Tag: 65902
  - 2
    - Book? Looking for a good C# ADO.net book. Any suggestions? Tag: How to Bind ListBox for Windows Form(VB.NET) Tag: 65897
  - 3
    - DataAdapter update method fails Hi. I got a problem with the OleDbDataAdapter object in .Net. The case is: I fill a dataset with data from an XML-file. This works fine. I then want to store the data into a database. This also seems to work fine. The problem ouccurs when I try to update the data in the table. If I read the same XML-file into the dataset and perform the Update method of the dataadapter it throws this Exception: ORA-00001: unique constraint (SOME.TABLE) violated Source code: ################################################################ Dim cb As New OleDbCommandBuilder(OleDbDataAdapter1) DataSet1.ReadXmlSchema( _ "H:\temp\foo.xsd") DataSet1.ReadXml( _ "H:\temp\foo.xml") OleDbDataAdapter1.Update(DataSet1) Catch ex As Exception Console.WriteLine(ex.Message) End Try ################################################################ It seem to me that the dataadapter trys to do an insert and fails because there already is a row with the same values in the table. Anyone got a clue how to solve this? Lars Tag: How to Bind ListBox for Windows Form(VB.NET) Tag: 65894
  - 4
    - Convert Dataset to ADODB.Recordset In order to reuse UI code in VB6 (for now) while we re- write server components. We want to be able to return ADODB.Recordsets from .NET code. This is what I have found so far http://support.microsoft.com/?id=316337 but I was wondering if there is a better solution. Tag: How to Bind ListBox for Windows Form(VB.NET) Tag: 65892
  - 5
    - How to lock a table or a database using VB.NET and ADO.NET with SQL Server 2000? Hi, I have a few question regarding Locking question. I'm using VB.NET and my Database is SQL Server 2000. 1) Certain part of my application, I need to lock the whole table to prevent other user from using it, how should I lock it to prevent user access the table. 2) There's one part of my application, I need to lock the whole database (block user) when I want to transfer the records from the working table to the storage table then release the lock after I'm done. How should I go about doing it? Regards Vanessa Tag: How to Bind ListBox for Windows Form(VB.NET) Tag: 65891
  - 6
    - SqlConnection I do an "SqlConnection" open and then a close, but the connection to the SQL server is not released. If I do a SP_WHO on the server I still see the connection. How to I get the connection to drop? Thanks -- CWee Tag: How to Bind ListBox for Windows Form(VB.NET) Tag: 65887
  - 7
    - renaming an element in a schema/dataset I read some xml data through a stream, and pass it to a dataset for it to read. First i initialize the dataset with an xml schema. The schema matches the data i get from the stream, but i want to change the name of some of the columns. Normally i would add some mappings to the dataadapter, but since i'm not using a dataadapter (there is no database involved - i get the xml data from a webservice) i don't know how. Is there any way you can define your schema, so it reads the correct data, but renames the column kinda like this: <xs:element name="date" type="xs:string" renamed-to="start-date" /> As far as i can see, there is no such attribute on the xs:element - or any other way to do it? All i want to do, is rename the column name and still (preferably) keep the relations to other tables/columns, without having to loop through the dataset creating a new one with different column names. Thanks! Tag: How to Bind ListBox for Windows Form(VB.NET) Tag: 65881
  - 8
    - Deserialize problem with OracleException On August 19, 2003, a reader discovered that he couldn't deserialize an OracleException. He began a thread with Scot Rose of Microsoft where he described the nature of the problem. The reader wrote, "We have narrowed it down to the constructor OracleException (System.Runtime.Serialization.SerializationInfo si,System.Runtime.Serialization.StreamingContext sc), which looks for members "message" and "source", but the GetObjectData (...) method in the base (System.Exception) uses the strings "Member" and "Source". Since the element lookup in SerializationInfo is case sensistive, GetElement() and FindElement() fail and the OracleException deserialize throws an exception." Scot Rose asked for a small project and the reader provided one. There is no record of a response from MS. So here's another project, a console app, that demonstrates the problem. I am running framework 1.0 with a "hotfix" version of System.Data.OracleClient.dll, version 1.0.1088.0 that fixes some of the MANY bugs in this provider. Can someone from MS follow-up on this bug and provide a work-around? Imports System.IO Imports System.Data.OracleClient Imports System.Runtime.Serialization Imports System.Runtime.Serialization.Formatters.Binary Module Module1 Sub Main() Dim conn As New OracleConnection("Data Source=ussxt6;User Id=foresight_mcp;Password=xxx") Dim cmd As New OracleCommand("select * from blah_blah", conn) ' will throw "Table or View does not exist" Dim reader As OracleDataReader Try conn.Open() reader = cmd.ExecuteReader() Catch e As OracleException Dim formatter As New BinaryFormatter() Dim stream As Stream = File.Open ("c:\temp\foo.bin", IO.FileMode.Create, IO.FileAccess.ReadWrite) formatter.Serialize(stream, e) stream.Close() stream = File.Open("c:\temp\foo.bin", FileMode.Open, FileAccess.Read) Try Dim obj As Object = formatter.Deserialize (stream) Catch xx As Exception MsgBox(xx.ToString()) End Try Dim phoenix As OracleException = CType (formatter.Deserialize(stream), OracleException) MsgBox(phoenix.ToString()) Finally If Not reader Is Nothing Then reader.Close() If Not conn Is Nothing Then conn.Close() End Try End Sub End Module Tag: How to Bind ListBox for Windows Form(VB.NET) Tag: 65872
  - 9
    - Detach SQL-Server Database from .NET Hi, I want to detach an SQL-Server database; what I'm doing is this: - Define an SQLCommand object with some SQLConnection - Change the database context to 'master' by setting "Database='master'" in the ConnectionString property of the SQLConnection - Set the CommandText of the SQLCommand object to something like "EXEC sp_detach_db @dbname=N'NameOfDatabaseToBeDetached'" - Open the connection - Call the ExecuteNonQuery() method of the SQLCommand object. My problem is: the database to be detached will always be reported as currently in use (error number 3703). Obviously, although I set the database context to 'master' explicitly, the established connection to the database to be detached seems to remain. How can I break the connection to this database? Thanks for an answer! Axel. Tag: How to Bind ListBox for Windows Form(VB.NET) Tag: 65871
  - 10
    - Problems with OleDbDataAdapter with parantheses When I try to run a select through the adapter with a parantheses at the start of the select, the adapter will not run the select, and thus returning a empty dataset back. e.g (SELECT * FROM A UNION SELECT * FROM B) UNION (SELECT * FROM C UNION SELECT * FROM D) Even the simplest select will fail if it starts with (. Anyone have a solution for this problem? I use "Provider=MSDAORA.1;Password=test;User ID=test;Data Source=MyTestDB" as connection string The following code Dim objAdapter = New OleDb.OleDbDataAdapter(sPSQL, sConnection) Dim objDataSet = New Data.DataSet() Call objAdapter.Fill(objDataSet, coReturnValue) I can connect to the DB and run the selects without any problems. Thanks! Tag: How to Bind ListBox for Windows Form(VB.NET) Tag: 65868
  - 11
    - Typed Dataset issue, Is this a bug IN VS 2003? I genereated typed dataset using several dataadapters in VS 2003. Now if I go to dataset view and click on property of any col. change it (for exsample make col. nullable) and save dataset, VB file associated with datase is gone. According to documentation vb file should be regenerated after each save of the schema. Am I doing something wrong? Is there anyway to manually force VS generate typed dataset based on excisted schema? I believe I was able to change schema in VS UI and VB file got updated automaticaly in VS 2002. Tag: How to Bind ListBox for Windows Form(VB.NET) Tag: 65867
  - 12
    - clob into oracle Can any one give me an example of using the microsoft .net managed provider for oracle to insert a clob into the database. We have a stored procedure which takes a clob as a parameter, but are struggling to populate a clob type parameter with the text we want to save. Tag: How to Bind ListBox for Windows Form(VB.NET) Tag: 65865
  - 13
    - Simple Timeout question Hello, just been trying to find the answer to what I think should be a rather simple question but can't seem to find a definite yes or no. Anyway question is, are asp dot net pages (aspx) subject to the same script timeout that normal asp pages are? IE after the default 90 seconds would the aspx through a timeout or will they carry on until an error or the page has finished running. I tried the following lowering the script timeout to 30 seconds and then adding the following line Thread.Sleep(120000) (which should tell the thread to sleep for 2 minutes) but it carried on till the sleep command finished and displayed the page as normal. If it is the case that the timeout does not apply to aspx pages, is there some property in the web.config that can set a time or is best practices to have something within the classes that knows when and how to stop a particular process if it appears to be taking to long. are there any msdn articles that discuss these things (I haven't had much luck so far but it is monday morning). Or is asp.net sufficiently different to not require the web server to timout if an action takes too long(in asp it was there to safeguard future requests from having to wait to long). Harry Tag: How to Bind ListBox for Windows Form(VB.NET) Tag: 65860
  - 14
    - A possible solution to my own question For the public's interest : I managed to do this by cunstructing a new DataSet , and filling it's rows dynamically , then binding a DataGrid to it. When filling the DataSet , I am using my existing DataSet with foreach , and getting it's parent and child columns when needed. not very efficient , but works 100%. Tag: How to Bind ListBox for Windows Form(VB.NET) Tag: 65857
  - 15
    - DataGrid Is it possible to display in a data grid rows from two realted tables ? example : Ther are two tables , ORDERS , and CUSTOMERS Order no.| customer ID| customer name --------------------------------------------------- 4 | 4 | moshe 5 | 4 | moshe etc... Tag: How to Bind ListBox for Windows Form(VB.NET) Tag: 65856
  - 16
    - Getting a Delete Command to work using Dataset & Data Adapter I'm using an Infragistics UltraWinGrid. After deleting the ActiveRow from the Grid, I get the following message: ---------------------------------------------------------------------------- ------------- An unhandled exception of type 'System.InvalidOperationException' occurred in system.data.dll Additional information: Update requires a valid DeleteCommand when passed DataRow collection with deleted rows. ---------------------------------------------------------------------------- ------------- So I attempted to manually delete the row from the data table after it was deleted from the Grid. dataSet_uGrid.tblItems.Rows[rowID].Delete(); dataAdapter_uGrid.Update(dataSet_uGrid, "tblItems"); But still get the same error message. Why is this so hard to commit the Delete Command to the database?? thanks. Tag: How to Bind ListBox for Windows Form(VB.NET) Tag: 65855
  - 17
    - How can I add or Delete records using DataGrid and dataAdapter?? Hi, I want to use datagrid to add/modify/delete record using datagrid. I load some table in dataset then set datagrid.datasourse = dataset. I tried to add record from datagrid, but it didnt work. It shows errors that has not new added records. If I add new row into table, It shows duplicate error. my some code here.. dataadapter.fill(dataset, tb1) dataGrid.dataSource = dataset.table("tb1") then i click add button. dataset.table("tb1").getchanges(rowstate.added) dataAdapter.InsertCommand=("Insert into tb1 (@id,@name,@age)") ******* I've set dataAdapter parameters and value here ******* dataAdapter.update(dataset, "tb1") dataset.table("tb1").acceptChange() Thanks, Kwok Tag: How to Bind ListBox for Windows Form(VB.NET) Tag: 65851
  - 18
    - Transaction State Dear M$, I think after paying $$$ for your products I do deserve to have the State propery in SqlTransaction. Please do not waste time on answering how I can overcome this limitation, just give me the State propery. MH Tag: How to Bind ListBox for Windows Form(VB.NET) Tag: 65849
  - 19
    - Sql Server CE How i can pull data between Sql Server and Sql Server CE Tag: How to Bind ListBox for Windows Form(VB.NET) Tag: 65848
  - 20
    - Copy data from DataTable to another ? Hello, What is the best way to create a new DataTable with data from exists DataTable i have already in my application ? Thanks, Boba. Tag: How to Bind ListBox for Windows Form(VB.NET) Tag: 65847
  - 21
    - MS-SQL and Oracle StoredProc In MS-SQL, when I want to use stored proc to query data out from the server and process it in ADO.NET DataAdapter / DataReader stuff. I don't have to bind the "out" parameter for getting the output. However, for Oracle DBRS, I need to create an additional "Cursor" output parameter, and I've to bind one more additional parameter. It makes my data access layer inconsistent. I've to seperate them. Does it has a easier way to solve this problem without duplication of my "query" codes ? Tag: How to Bind ListBox for Windows Form(VB.NET) Tag: 65846
  - 22
    - How can i get the size of the datatable? Hi,All: How can i get the size of the datatable(including data in the datatable) in memory? Thanks David Tag: How to Bind ListBox for Windows Form(VB.NET) Tag: 65843
  - 23
    - dataadapter update Using W2K, SQL2000, Framework 1.0 I don't understand why the corrected field is NOT witten back to disc. Table PERS has two coloumns: ID and data (image) // Task: exchange first byte in field 'data' with 0x49. Conn.Open(); SqlDataAdapter da = new SqlDataAdapter("Select * from PERS where ID='1'",Conn); SqlCommandBuilder myCB = new SqlCommandBuilder(da); DataSet ds = new DataSet("PERS"); byte[] myData = new byte[5000]; da.Fill(ds,"PERS"); DataRow myRow; myRow = ds.Tables["PERS"].Rows[0]; myData = (byte[]) myRow["data"]; // offset 0 has the correct value myData[0] = 0x49; myRow["data"] = myData; ds.Tables["PERS"].Rows[0]["data"] = myData; da.Update(ds,"PERS"); What have I done wrong in this sniplet? Regards, flemming Tag: How to Bind ListBox for Windows Form(VB.NET) Tag: 65838
  - 24
    - Using dataset after insert, update, or delete I'm trying to refresh a datagrid after I insert, update, or delete rows from a DataSet. Once the database has been altered, do I need to re-query the database?? Or is the DataSet reflective of the current state of the database? thanks Tag: How to Bind ListBox for Windows Form(VB.NET) Tag: 65837
  - 25
    - Problem writing Binary to SQL using OLE.DB. Can this be done. Gentlemen: I am trying to write Binary data to SQL using both SQLClient and OleDb. SQLClient works, but OleDb fails. When I try to update using OleDb, I get the error "Must declare the variable '@BLOB'". But I am declaring this "@BLOB" parameter, so why am I getting this error. Now the same code in SQLClient works fine, and I get no error. Is updating binary possible with OleDb, or only in SQLClient? Does the approach have to be altered for OleDb? If so how? Here is my code: ========================================================== Dim intLength As Integer = 0 'Lenght of Blob being saved. Dim cn As OleDb.OleDbConnection 'Connection Object. Dim pParameter As New OleDb.OleDbParameter 'If > 0, then UPDATE succeeded. Dim intResult As Integer 'Add Parameters. Dim cmdUpdateCommand As New OleDb.OleDbCommand 'Update Command object. Dim strUpdateCommand As String 'Update Command. .... 'Define Connection. intLength = mbytPhoto.Length 'Attempt to get length of the Blob. strUpdateCommand = "UPDATE Employees SET Photo = @BLOB WHERE EmployeeID = 10" pParameter = New OleDb.OleDbParameter 'Beginning of Parameter pParameter.ParameterName = "@BLOB" 'Input Parameter name. pParameter.Direction = ParameterDirection.Input 'Input Parameter direction. pParameter.OleDbType = OleDbType.Binary 'Type is binary. pParameter.Size = mbytPhoto.Length 'Length of Photo Blob. pParameter.Value = mbytPhoto 'Add Photo BLOB Parameter. cmdUpdateCommand.Parameters.Add (pParameter) 'Add BLOB Parameter. cmdUpdateCommand.CommandText = strUpdateCommand 'Define update command. cmdUpdateCommand.CommandType = CommandType.Text cn.Open () 'Open a connection. cmdUpdateCommand.Connection = cn 'Define connection. Try intResult = cmdUpdateCommand..ExecuteNonQuery 'Update Database with new BLOB. Catch Bad As OleDbException strUpdateCommand = Bad.Message 'Error Returned: "Must declare the variable "@BLOB" Why? End Try cn.Close () 'Close the Connection. Tag: How to Bind ListBox for Windows Form(VB.NET) Tag: 65830
- Next
  - 1
    - Multiple comboboxes bound to same datasource I have multiple ComboBox controls bound to the same DataSource (a DataSet). The DataValue and DataMember properties are all bound to the same columns of the DataSet. The SelectedValue properties of the ComboBoxes are each bound to unique columns of another DataSet (a different DataSet from the DataSource property). When I change the value of any of the ComboBoxes (by selecting a different item from the drop down), the value of all up the ComboBoxes update to this newly selected value. How can I get rid of this behavior? I want each ComboBox to be populated with the same data, but be able to each have a different value selected... Thanks, Mike Tag: How to Bind ListBox for Windows Form(VB.NET) Tag: 65825
  - 2
    - Stored Procedure Parameters with oldDb The oldDb Command does not support Named Parameters. If I am reading them correctly, the docs say that the order of the parameter should match the order they are declared in the Stored Procedure. When I do this the data ends up in the wrong fields. I am using C# standard with the MSDE. If I understand it correctly I can't use the SqlCommand because C# standard does not allow that. It also will not work with an SQL server, only an MSDE (and it does know the difference). The Stored Procedure is: INSERT INTO dbo.DemoShipments (PTYPE, RequestDate, Company, Dept, Name, JobTitle, Phone, Ext, Addr1, City, State, Zip, email, Source) VALUES (@PTYPE, @RequestDate, @Company, @Dept, @Name, @JobTitle, @Phone, @Ext, @Addr1, @City, @State, @Zip, @Email, @Source) private void Button1_Click(object sender, System.EventArgs e) { oleDbCmdAddDemoReq = new OleDbCommand("SpAddDemoReq", oleDbConDemoReq); oleDbCmdAddDemoReq.CommandType = CommandType.StoredProcedure; // NOTE: ORDER OF PARMS ADDS MUST MATCH ORDER OF PARMS oleDbCmdAddDemoReq.Parameters.Add("@PTYPE", ThisType); oleDbCmdAddDemoReq.Parameters.Add("@RequestDate", System.DateTime.Now); oleDbCmdAddDemoReq.Parameters.Add("@Company", txtCompany.Text); oleDbCmdAddDemoReq.Parameters.Add("@Dept", txtDept.Text); oleDbCmdAddDemoReq.Parameters.Add("@Name", txtName.Text); oleDbCmdAddDemoReq.Parameters.Add("@JobTitle", txtTitle.Text); oleDbCmdAddDemoReq.Parameters.Add("@Phone", txtPhone.Text); oleDbCmdAddDemoReq.Parameters.Add("@Ext", txtExt.Text); oleDbCmdAddDemoReq.Parameters.Add("@Addr1", txtMailAddr.Text); oleDbCmdAddDemoReq.Parameters.Add("@City", txtCity.Text); oleDbCmdAddDemoReq.Parameters.Add("@State", drpState.SelectedValue); oleDbCmdAddDemoReq.Parameters.Add("@Zip", txtZip.Text); oleDbCmdAddDemoReq.Parameters.Add("@Email", txtEmail.Text); oleDbCmdAddDemoReq.Parameters.Add("@Source", "Web Form"); oleDbCmdAddDemoReq.Connection.Open(); oleDbCmdAddDemoReq.ExecuteNonQuery(); oleDbCmdAddDemoReq.Connection.Close(); } When I do this the Zip info ends up in the Source field, the State ends up in the Zip, the City ends up in the State and the Source ends up in the City field. Yes, I can fix this by moving the fields around but if they were not all text fields I would have been getting odd error messages that I would not have understood. What am I doing wrong? Tag: How to Bind ListBox for Windows Form(VB.NET) Tag: 65824
  - 3
    - IDbTransaction.Dispose() behavior Hello, I have noticed that during Dispose() uncommitted transaction is automatically rolled back . This behavior is exactly what i am expecting, but I have not found any reference in the documentation . Can I safely rely on such behavior in my code? Thanks in advance, Alexander Myachin Tag: How to Bind ListBox for Windows Form(VB.NET) Tag: 65819
  - 4
    - Copy DataRow After I use DataTable.ImportRow(oOtherRow); How do I find the newly imported row in my DataTable since they neglected to return a rowid or the DataRow form the ImportRow() method. I'm assuming that is has to construct a new DataRow so it can set it's table property to be my table, so the row reference I added won't be the resulting one in the DataTable. Tony Tag: How to Bind ListBox for Windows Form(VB.NET) Tag: 65818
  - 5
    - Sample Code for Forward, and Backward movement Could someone lead me to some simple code where I can select data from an access table via ado.net and display it in a grid for forward, and backward movement? Byron... Tag: How to Bind ListBox for Windows Form(VB.NET) Tag: 65814
  - 6
    - displaing data from a dataset in another form Hello Putting the myDataSet in Form2 I'd like to put a DataGrid1 in Form1 that gets data from the myDataSet in Form2 If I select DataGrid1, selecting in the property window DataSource I can't see myDataSet, I know I can set that by code, but how can I do it visually? N.B. I'm using Visual c# .net Thanks, Peter Tag: How to Bind ListBox for Windows Form(VB.NET) Tag: 65811
  - 7
    - Newbie Question - DataSet/DataView (DataGrid?) Hello , a newbie question : Background - I am building a simple application, and since I don't have a database server I am using XML to store the data and the DataSet.readXml() to load and save the date. Thus I can't as far as I know use SQL commands. (If anybody has an idea of a better way to do it , I would be VERY VERY thankfull!!). Question - I want to display to the user , a result query from two tables like : SELECT Employees.Name Bosses.ID FROM Employees, Bosses WHERE ... But with DataView.Select() I don't know how to get data from two tables , and in DataGrid I also don't know how to display in the same datagrid data from two tables... The tables are related child->parent. Any suggestion how can I do it? Thanks. Tag: How to Bind ListBox for Windows Form(VB.NET) Tag: 65805
  - 8
    - Sub-Grid? Complicated relationships - how to proceed? Hi, I'm designing a web registration form used to link several related organizations together using asp.net. I'd really appreciate some advice on data and control structure. I have the following data structure in my SQL database: Users id,user name, password, first and last name, etc. Organization id, org name, description, logo binary/path, etc. Locations_Addresses id, street address, etc. States_Provinces id, state_province name, abbrev, state tax code, etc. What I need to do is associate Users.id with the Organizations.id within the datagrid(s?), in a way that will allow users to select which org they belong to, and also, "add" an unlisted org. In other words, I'd like to allow for a Select DropDownList with "Other/Add" as a default, with another textbox set for adding an unlisted org. In order to allow for moderation, "added/suggested/registered" organizations should remain "inactive" until reviewed and approved by an administrator, so they would not immediately be available in the dropdown list for other users without human interaction (admin). In the same way, I'd like to enable this "Select or Suggest" style interaction with my users for other fields like their Locations_Addresses, States_Provinces, etc. Taking the idea to completion, Suggested/Moderated field sets of this nature should be un-editable once suggested, so that a user would need to add a new org/location/state and suggest at the same time a cancellation of the old data (ie address change). Can someone please give me some guidance on how to accomplish this sort of functionality? I'm already weeks into this form and I can finish it with this one (although fairly complex) element. One example of the use of this form structure is to allow a multi-denominational church registration where members either pick a registered denomination, and then choose from a list of associated locations (or add one), with an associated state, or register a new denomination with all new associated data. I'd like to avoid a separate "Add Organization" form if possible. I'd be glad to post my code so far if that's allowed in this group, as it's a good (I hope) example of datagrid add new record, edit login record code. I'd love suggestions on security, optimization, syntax, etc. Thanks for any help! Drew New York Tag: How to Bind ListBox for Windows Form(VB.NET) Tag: 65802
  - 9
    - [BUG] OleDb driver for .NET doesn't report ordinals for PK fields correctly When you use the GetOleDbSchemaTable() method of the OleDb connection object with the parameter OleDbSchemaGuid.Primary_Keys and you request the primary key fields for a table which has the primary key fields at ordinal positions other than the first fields (for example column 3 is the primary key field), the GetOleDbSchemaTable() method will return a set of PK fields in a datatable but the column 'ORDINAL' in that datatable doesn't contain the right ordinals: it always contains values which start with '1' and count up. The ORDINAL column is therefore not usable, it doesn't reflect the correct value. Please fix. :) TIA Frans Bouma http://www.llblgen.com -- Get LLBLGen Pro, the new O/R mapper for .NET: http://www.llblgen.com Tag: How to Bind ListBox for Windows Form(VB.NET) Tag: 65800
  - 10
    - ADO or ADO'T_Binding dataset to an array? I have an array which has been filled from a text file and want to load these several hundred fields into my db, which consists of 3 tables(each of which will be receiving a portion of this data) I also want to be able to do the reverse > load my db into an array for processing into a report. I've worked with several textbook examples of ADO.net programs to manipulate data within an Access db, but I haven't found anything that covers what I am trying to do now, other than a few hints that yes, a dataset can be bound to an array. Can anyone give me a hint as to how to go about doing this? Thanks - Sean Tag: How to Bind ListBox for Windows Form(VB.NET) Tag: 65799
  - 11
    - select In DataSet Hi, I have dataset which contains the data like this TranDate PurchaseVal ------------ ------------- 2003-01-01 51 2003-01-02 52 2003-01-03 54 2003-01-04 53 2003-01-05 54 2003-01-06 56 2003-01-07 58 2003-01-08 52 2003-01-09 51 2003-01-10 55 From this data I want weekly Info Week Value 1 208 2 --- 3 --- How I can get this If I am using .Select("DatePart(week,TranDate)= " & 1) it is giving me the error DatePart is not defines Need Advice LIN Tag: How to Bind ListBox for Windows Form(VB.NET) Tag: 65798
  - 12
    - How can I delete only the elements in a joined table?? I have Table1: CodeArticle, name, quantity Table2: CodeArticle, date SELECT * FROM table1,table2 WHERE table1.quantity>10 AND Table1.CodeArticle=Table2.CodeArticle Now, I want to delete only the elements in Table2 Thanks *** Sent via Developersdex http://www.developersdex.com *** Don't just participate in USENET...get rewarded for it! Tag: How to Bind ListBox for Windows Form(VB.NET) Tag: 65797
  - 13
    - Multi-threaded DataTable causes NullReferenceException Hello, I'm using a single DataTable in multi-threaded scenario. The DataTable is not connected to any database, just created and filled in from local XML file. Since multiple threads can modify this single DataTable, I use C# lock statements whenever I make changes to the DataTable, but sometimes, where repro-steps are not exactly clear, ADO.NET causes NullReferenceException. Here's stack trace: at System.Data.DataTable.get_LiveIndexes() at System.Data.DataTable.SetNewRecord(DataRow row, Int32 proposedRecord, DataRowAction action, Boolean isInMerge) at System.Data.DataRow.EndEdit() at System.Data.DataRow.set_Item(DataColumn column, Object value) I don't remember where but I remember I read notes saying ADO.NET supports multi-thread only in DataSet/DataTable, so my understanding is that as long as I serialize modify-operations (new, add, delete, change), it should work. But since the exception occurs deep inside of the ADO.NET, I'm guessing this is ADO.NET bug. Has anyone experienced errors like this? Any pointers to workarounds are greatly appreciated. Note that similar errors were seen since .NET Framework 1.0, but stack traces were different. This is from .NET Framework 1.1. Thanks, Koji Ishii Tag: How to Bind ListBox for Windows Form(VB.NET) Tag: 65796
  - 14
    - Oracle-Data not changeable in Server-Explorer Hello, I have a problem: I can not change data manually in any Oracle table from server-explorer of VStudio.NET 2003. I always get a messagebox that says "..not changeable" when I try to hit a key while editing a field. The database is an Oracle 9i Win2k Server SP4. The Client has the "Oracle Client" installed on Win2k. I remember that earlier it was possible. But at some point it was no more. May be this is a special Oracle problem. But hopefully someone can help me. thanks Frank Tag: How to Bind ListBox for Windows Form(VB.NET) Tag: 65795
  - 15
    - Updating to Access Hello, I am new to ADO and VB.Net. I am not new to using Access. I am in the process of creating a very large entry system for dog shows and I am having a problem. All seems to work except one very important thing and that is saving the actual data that has been input to the bound controls between my Windows VB form and the actual Access table. I know that this is a very broad and general topic, but any little information may help. I have my ole db data adapter, my datasets in place and I have code that reads oledbdataadapter1.update(dsDataset1) When this runs, no data is updated. I have read about data tables, data views, adding rows, insert, update, delete, etc, but I am missing something other than simply creating a data adapter, creating a dataset and then using the data adapters update to write changed or new records back to the Access table. Again, thanks for any information. Brad Tag: How to Bind ListBox for Windows Form(VB.NET) Tag: 65793
  - 16
    - HELP:Oracle.Client Execute StoreProcedure Find Exception:ORA-06550:row 1,col7,error paramater number and type who can help me,thank you very much Tag: How to Bind ListBox for Windows Form(VB.NET) Tag: 65792
  - 17
    - Adding Records Hello all, I don't believe I forgot how to do this, I want to add a new record to a new access database and I cannot remember how to do this. I have a connection object which opens and closes correctly. What do I have to do to get that pesky little record into the database? I have tried several ways and nothing seems to be working for me. If someone would be kind enough to include a small example to insert a single item into a database I would be very grateful. I haven't worked with databases since vb6, I've been using mostly XML, the problem with this is I am parsing SUS (software update service) log files in excess of 25MB that is several hundred thousand records, I really need to be able to search and manipulate it quickly. Thanks in advance, Jared Here is one of my tries that went nowhere. 'Dim dt As DataTable = Me.MyDataSet.Tables("tblClientDetails") Dim dt As DataTable = MyTable Dim MyRow As DataRow MyRow = dt.NewRow MyRow("PingID") = NewRecord.Details.PING_ID MyRow("DateServiced") = NewRecord.DateServiced MyRow("TimeServiced") = NewRecord.TimeServiced MyRow("RequestingIP") = NewRecord.RequestingIP MyRow("ServicingIP") = NewRecord.ServicingIP MyRow("VERSION") = NewRecord.Details.VERSION MyRow("CLIENT") = NewRecord.Details.CLIENT MyRow("ACTIVITY") = NewRecord.Details.ACTIVITY MyRow("ITEM") = NewRecord.Details.ITEM MyRow("DEVICE") = NewRecord.Details.DEVICE MyRow("MAJ_VERSION") = NewRecord.Details.PLATFORM.MAJ_OS_VER MyRow("MIN_VERSION") = NewRecord.Details.PLATFORM.MIN_OS_VER MyRow("BUILD_NUM") = NewRecord.Details.PLATFORM.BUILD_NUM MyRow("PLAT_ID") = NewRecord.Details.PLATFORM.PLAT_ID MyRow("SUITE_MASK") = NewRecord.Details.PLATFORM.SUITE_MASK MyRow("PROD_TYPE") = NewRecord.Details.PLATFORM.PROD_TYPE MyRow("PROCESSOR_ARCH") = NewRecord.Details.PLATFORM.PROCESSOR_ARCH MyRow("LANGUAGE") = NewRecord.Details.LANGUAGE MyRow("STATUS") = NewRecord.Details.STATUS MyRow("ERRORCode") = NewRecord.Details.ERRORCode MyRow("MESSAGE") = NewRecord.Details.MESSAGE MyRow("PROXY") = NewRecord.Details.PROXY dt.Rows.Add(MyRow) Tag: How to Bind ListBox for Windows Form(VB.NET) Tag: 65790
  - 18
    - Thanks Guys. This is a multi-part message in MIME format. ------=_NextPart_000_0008_01C37A1E.4D688990 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable CJ and others have pointed me in the right direction. After reading most = of th book i bought last night i realized i was creating my own = headaches by not seperating my data access, business logic, and = presentation layers. I have finally came to an understanding with the = new OOP practices available to VB .NET and now i am staring over and = wring completely re-useable code throughout my project. And i just = wanted to say thanks for you help and insight. Jeff Brown P.S. The book is pretty informative OOP: Building re-useable components = with Visual Basic .NET, I haven't started reading the ADO.NET book as i = realizeed my problem was not with ADO.NET but rather my architectual = structure of my program. ------=_NextPart_000_0008_01C37A1E.4D688990 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <HTML><HEAD> <META http-equiv=3DContent-Type content=3D"text/html; = charset=3Diso-8859-1"> <META content=3D"MSHTML 6.00.2800.1226" name=3DGENERATOR> <STYLE></STYLE> </HEAD> <BODY> <DIV><FONT face=3DArial size=3D2>CJ and others have pointed me in the = right=20 direction. After reading most of th book i bought last night i realized = i was=20 creating my own headaches by not seperating my data access, business = logic, and=20 presentation layers. I have finally came to an understanding with the = new OOP=20 practices available to VB .NET and now i am staring over and wring = completely=20 re-useable code throughout my project. And i just wanted to say thanks = for you=20 help and insight.</FONT></DIV> <DIV><FONT face=3DArial size=3D2></FONT> </DIV> <DIV><FONT face=3DArial size=3D2>Jeff Brown</FONT></DIV> <DIV><FONT face=3DArial size=3D2></FONT> </DIV> <DIV><FONT face=3DArial size=3D2>P.S. The book is pretty informative = <U>OOP:=20 Building re-useable components with Visual Basic .NET,  </U>I = haven't=20 started reading the ADO.NET book as i realizeed my problem was not with = ADO.NET=20 but rather my architectual structure of my = program.</FONT></DIV></BODY></HTML> ------=_NextPart_000_0008_01C37A1E.4D688990-- Tag: How to Bind ListBox for Windows Form(VB.NET) Tag: 65789
  - 19
    - How to catch SQL event in managed code Hi, I have application which is writting data to SQL table. I have also some demon process, which is pooling new records from that table and if new record is found demon starts some task. Now I would like to change this pooling with triggering, of course if this is posible. So, my question is, is it possible in managed code to be registered for some event, which is triggerd from SQL server when for example new record is added to specific table. Thanks Edvin Tag: How to Bind ListBox for Windows Form(VB.NET) Tag: 65786
  - 20
    - Dataset filtering problem Hi, I have a problem that might be easy to solve(possibly, I've just overlooked an easy solution). Here we go: I have a dataset with 2 datatables in it. Now, I need to do the following: if ds.table(0).rows(0).item("col1") = ds.table(1).rows(0).item("col2") then txtResult.text = ds.table(1).rows(0).item("col3") end if The problem is, that possible match exists in the database, but not nessasarily at Rows(0). It could be at different index. But how to actually get to the correct index?? I looked into the database, and in my case first possible match is at index Row(1) so the correct version'd be like this: if ds.table(0).rows(1).item("col1") = ds.table(1).rows(1).item("col2") then txtResult.text = ds.table(1).rows(1).item("col3") end if But of course, there is no way to know in advance, what index to use, so I'm lost a bit. Basically, I have a couple of ways of doing it. I could use Select or Find methods of datatable object to apply filtering on the datatables. But, the problem is that filtering needs to be applied on 2 different tables of the dataset, but I know how to do it for 1 datatable only. I need to merge 2 datatables into dataview and apply a filter. But how to do it? Anyway, if anyone has any ideas, so please share it with me. Thanks a lot in advance, --Alex Tag: How to Bind ListBox for Windows Form(VB.NET) Tag: 65783
  - 21
    - Don't need connection.open() for adapter.Fill.. right!? I repeatedly see questions in the example exams from the Microsoft press self paced training kits that assert that a connection needs to be opened before adapter.Fill() can be called, and my understanding is that this is absolutely not the case. Has anyone else noticed this? Tag: How to Bind ListBox for Windows Form(VB.NET) Tag: 65781
  - 22
    - One table two forms Hi I want to use one contacts table in two separate forms in different contexts. One form is the main entry form and the other is the lookup form. Currently I have the contacts table as part of my single dataset. Can I use the same table or do I need another instance of the table or do I use two dataadapters or what? Thanks Regards Tag: How to Bind ListBox for Windows Form(VB.NET) Tag: 65777
  - 23
    - Databinding to Dataset Hi All, I have returned a dataset which as 13 rows. DsCustomers1.Clear() Dim con As New Component1 DsCustomers1 = con.FillCustomers(cboCountry.Text) MsgBox(DsCustomers1.Tables("Customers").Rows.Count) the dsCustomers1 is a dataset on Form1. I have the databindings.text property set to DsCustomers1 - Customers.CompanyName. Now when I get the dataset, it doesn't update the TextBoxes on the form. Any ideas? Thanks. Tag: How to Bind ListBox for Windows Form(VB.NET) Tag: 65775
  - 24
    - error in databinding Thank u for replying but my problem is that the calculated value does appear in the text box but the database doesnt get updated. that text box is has data binding and iam updating it through data adapter.update( ) function. As soon as i click the update button previous calculated value is shown in the database not the new one ........ although it does appear in the text box thanks afsheen "Rizwan Ahmed" <rizwanahmed_81@hotmail.com> wrote in message news:OAGFMyaeDHA.3896@tk2msftngp13.phx.gbl... > You can just programatically code the TextField change Event > So, when the value will be chnaged in the text fields that are bound and > value will be changed > or you can out the calculating code in the updated code > thanx, > > > "afsheen" <afsheenj@hotmial.com> wrote in message > news:OrKAlFZeDHA.2080@TK2MSFTNGP12.phx.gbl... > > Thank you for your replyl > > > > My database is being updated with the rest of the values except for one > text > > box . The textbox's value with data binding is calculated > programmatically > > and when when i run the form the correct value appears but when i press > the > > update button, the old value appears in the same text box ..... how do i > > update the database with the programmtically calculated value in a text > box > > binded to the database > > > > thanks > > afsheen > > > > > > Tag: How to Bind ListBox for Windows Form(VB.NET) Tag: 65773
  - 25
    - How to run SQL scripts? Hi, I have a *.sql file which includes a database script. How or where can I run it? Thanks, Rainer. Tag: How to Bind ListBox for Windows Form(VB.NET) Tag: 65772

Hi,

1)I have List Box which displays all user list, When I
double click on User , I am displaying User Information on
the right hand side Text Boxes , But In Order to Retrive
the values I can't query with User Name because there are
duplicate names , So I Want to find details about the user
with his/her ID#. How would I do that when I bind the
ListBox at the FormLoad event.

2)How could I Call another form from other form by using
formname.show ( used to be in VB 6).

thanks,
Saurabh

Top

Re: How to Bind ListBox for Windows Form(VB.NET) by William

William
Mon Sep 15 12:56:04 CDT 2003

You can use the DisplayMember and ValueMember properties. the Bound list
box would DisplayMember would be the name, the valuemember would be the id.
Of you could concatentate them without databinding at all and then extract
the number.

In vb.NEt, declare a new form instance and then use show.

Dim frmSomething as New frmSomething
frm.Show

HTH

Bill
"SAM" <saurabhlakhia@msn.com> wrote in message
news:364801c37bb1$53c086a0$a501280a@phx.gbl...
> Hi,
>
> 1)I have List Box which displays all user list, When I
> double click on User , I am displaying User Information on
> the right hand side Text Boxes , But In Order to Retrive
> the values I can't query with User Name because there are
> duplicate names , So I Want to find details about the user
> with his/her ID#. How would I do that when I bind the
> ListBox at the FormLoad event.
>
> 2)How could I Call another form from other form by using
> formname.show ( used to be in VB 6).
>
> thanks,
> Saurabh

Top