I have a datagridview bound to a datatable. I update the datatable quickly and constantly (each row updated multiple times per second).
column value of particular row is updated manually by setting properties in the contained items..
DataGridView1.Rows(index).Cells("col1").Value = message
Error : Index was outside the bounds of the array.
[Code] Here _data is a string containing the encrypted value. m_transformDec is the Decryptor created previously. Usually this works. Occasionally, I get a "bad data" error. I print out the value of _data, and it is always the same. The code is multi-threaded, which I suspect is the reason for both the problem, and it being hard to reproduce. The decryptor is created in the creation of the class, and the decryption is done in a Shared function, but I don't see anything there which is not thread-safe. Any ideas?
View 1 RepliesI'm getting the following error trying to update a SQL 2000 table from a DataGridView:
"Dynamic SQL generation for the UpdateCommand is not supported against a SelectCommand that does not return any key column information"
The pkClaim in the select is the key column. I don't know what I'm doing wrong here.[code]......
I'm populating a DGV from a DataSet... all done by code. I have the properties set to allow editing, etc. However, when I make changes to a record, they're not updating back to the Database. I suppose my assumption that by setting the properties to allow editing would automatically write the changes back to the database were wrong. Do I have to write update, delete, etc. commands?
View 3 RepliesI have a datagridview where i add rows using array like this:
Dim srow() As String = {getIDprodus(cmbprodus.Text), cmbprodus.Text, getprodusforma(cmbprodus.Text), txtcantitate.Text}
griddetalii.Rows.Add(srow)
Next, i need to let user to modify the added row. So when user selects a row and press EDIT, a new form is popped out using this code:
Dim i = griddetalii.CurrentRow.Index
frmdetaliiiesire.cmbprodus.Text = griddetalii.Item(0, i).Value
frmdetaliiiesire.txtcantitate.Text = griddetalii.Item(1, i).Value
[Code]....
In textbox1 i have put the index of the current row selected in grid The problem is when i push OK, the applications crashes and i receive an error: INDEX WAS OUT OF RANGE
If the users changes the values from the same form, it's works. But changing them from another form crashes the applications
I would like to update data from my datagridview to ma database manually.
How should I determine which rows were edited?
I'm learning some more VB in my spare time, and I'm making a simple customer database that uses SQLCE. I've got the datasource set up and all that, but for some reason when I hit accept on the form, nothing happens?
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I have a little big problem in one application.
I have a datagridview with data from a datatable, this datatable have these fields (id,num1,num2, date,user,ref,qt,cost,center), some of them are hided in the dgv (id,num1,num2,date,user). The user can edit,delete and add new rows to the dgv.
I have a save button that performs this actions:
First check if there are new rows, and if yes it fill the hidden fields. Then validate the inserted values by the user with a couple of ifs. In the end, i call the bindingsource EndEdit, and call the adapter Update command against the datatable...
This sometimes works others not really, i don't understand why.
The error it's: "Concurrency violation: the DeleteCommand affected 0 of the expected 1 records"
I think sometimes when Updating it occurs to.
I have a datagrid view that displays information from a table. Changes I make to the data grid view are not saved. I have a button called btnsave but I have no idea what to put in the click event to save changes to the DB.
vb
Dim ConnStr As String = String.Format("Provider=Microsoft.Jet.OLEDB.4.0;Data Source={0}", DataDir)
Dim conn As New OleDb.OleDbConnection(ConnStr)
Dim sql As New OleDb.OleDbCommand("Select * FROM USERS")
Dim dt As New DataTable
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i m having problem while updating my database... In this code when i delete records then it will deleted but it can't show updated data..for viewing new updated data i hav to again open the form ... so is there any code which i miss??? to update database @ runtime??
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I have a small program with Members table and for subscription. The table has a joindate, expirationdate, status and gracedate collumns. When I run my program n click on a button I want the program to update the STATUS text by checking expirationdate column if is greate or equals to todays date then Set it to Expire.[code]Here is the error message I get on runtime: Syntax error in string in query expression 'Expirationdate <= '26 July 2011'.All I need is to change the status text into Expire if expirationdate <= todays date.
View 1 RepliesI am developing a fairly comprehensive Excel add-in, applying a lot of ops. Take a workbook, save under new name, apply actions (add names, change formulae, etc). Generally it works fine, but from time to time .Net throws an InvalidCastException on virtually any of my CTypes. When I acknowledge the error and run the code again (without quitting Excel) on the exact same Excel workbook, no error occurs. The InvalidCastException occurs maybe in 40% of all tries, otherwise the add-in succeeds.
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I am sorry to keep bothering you about this damn DataGridView control ... As you might have noticed I am having a hard time with the DataGridView control ... My latest problem has to do with updating the data base file (Access) through a DataGridView control .
Up to now I have managed to successfully edit an entry in the DataGridView control and moreover to successfully update the data base file itself .
The above form and its code work fine . The problem starts when I am trying to run the code of the Update button from another form .
You see , I have another form , through which I change the contents of some of the cells in the DataGridView control (back in Form1) . What I want next is to simply update the data base file itself , just like I was doing with the button in the first form , after I manually changed the cell in the DataGridView control .Thus , on the second form I have a button with this code :
Form1.Button1_Click(Nothing, Nothing) (of course the Click event is declared public)I have also tried :
Form1.Button1.PerformClick()
but still nothing ...Although Form2 successfully changes the cells back in Form1 , the data base file itself does not get updated ...If I manually press the Update button in Form1 I once again successfully update the data base file , but I want to do the whole thing by calling the Update button from Form2 .
I have recently built an N-Tier app using VB.Net 2008. The application is based on Beth Massi's tutorial at [URL] I am trying to incorporate a datagrridview control on a Parent form - one parent (father and mother) to many children. For example,
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I'm trying to update data to a Access data base using the following [code]...
View 3 RepliesI am getting an unknown error when I access one of my datagridviews. I get this error when I go to the tabpage where there is this datagrid and also when I put my mouse cursor over it.I don't know how to fix this because I don't know which code cause it. When I step through everything is ok, this error occurs at run time but doesn't show where and doesn't even stop the program.
View 5 RepliesI am trying to populate a datagridview with the content of a text file.
the text file contents are as follows:
[Code].....
I get no error while building the project. The textline variables are being populated correctly.
i got this error in my code when the program runs i dont know what am i doing wrong Datagridview Default Error Dialog The Following exception ocurred in the datagridview System.InvalidOperationException: Binding Source cannot be its own data source.
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I have a data grid view bound to a sql server table. What I am trying to do is have changes made in the dgv update in the sql table. I tried to use the Update method of the table adapter but get the following error.[code]....
View 4 RepliesI have a datagridview with a datatable as datasource. If I add a row to the datatable, then the datagridview is not showing the contents.
grdChannel1.DataSource = CreateTable(colChannel)
Private Function CreateTable(ByVal colChannel As MyCollection(Of Channel)) As DataTable
'Create table and add collection into
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I have 2 row counts if I check the the row counts of the datagridview in the debugging mode.
I have a datagridview which i filled with this code:
Dim daProd As New SqlDataAdapter
m dsProd As New DataSet
cmd = New SqlCommand
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I'm woking in aprogram that read sms from phone and show them in datagrid.berfore I link the datagrid to the database it read the show the message fine in the datagrid but now it show Error message
the code for the form load Code:Dim con As OleDbConnection = New OleDbConnection("Provider=Microsoft.jet.oledb.4.0" & ";data source=" & Application.StartupPath & "SMS.mdb") Dim Mocmd As OleDbCommand = New OleDbCommand("Select * FROM TableMobinil", con) Dim myDA As OleDbDataAdapter = New OleDbDataAdapter(Mocmd) Dim myDataSet As DataSet = New DataSet()
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i use this to populate my datagridview:
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to replace this default dialog please handle dataerror event and the combos value then changes to the id of the job i select
I am trying to add and update data in a db from a DataGridView. I have a save button that runs this code. The code works fine. It figures out which rows are new and add it into the DB and which rows are updated and updates them in the DB. BUT if you press the button again it will add the new row in again. it does not mark the new row as one that needs updating when the button is pressed again
Dim recall As New stLib.clsRecall
Dim rulesRow As DataGridViewRow
For Each rulesRow In DgRules.Rows
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teaching myself (an oldfashioned VBA programmer) VB2010 by converting an existing Access 2003 application to VB2010. I can read my data from an Access database into a datagridview:
'Biog datagridview
cnGrid.ConnectionString = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=C:UsersPeterDocumentsDatabasesTestDatabase.mdb;User Id=admin;Password=;"
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my code to update my data from a datagridview wich is bound to a datatable.
all works fine until the update proccess is started. The programs updates all my rows (x amount) on the datagridview but when it is saved the first rows data is reverted to what it was before update proccess was started..
EX.
My rows
ID Reg Brand
0 123 456
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The first row did not save the new data passed to the datagrid but all the other rows did save the data correctly...
I am trying to update a database table that's attached to a table adapter and can't quite seem to be able to get the code to work. It was suggested that I use an update statement, but the person I was working with had no idea how to update a table adapter. how to update a table adapter.
View 2 RepliesI have a datagridview that I am binding to a collection. What I need to do is process each object in the collection (send quotes to our customers), and then display the items status in the grid. Then once the collection is completely processed clear the grid of items for the next round. I am binding to the collection with .DataSource = collection.
My Question:What would be the best way to update the grid as the collection is processed one object at a time.Initially I had thought about storing each item in a database table and then bind the grid to the table. Then as I processed each record, update the record and rebind the grid. The problem I had with that method was that I would be constantly writing and deleting data from the same table. That seemed unnecessary vs just using a collection and updating the collection.
I am trying to update a query in a datagridview using user input from a textbox and a button to apply the query to the grid........
Public Class Form4
Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
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I have a DGV with a single row that I want to update with new data in a timer. What is the best way to do this? Would I just update each cell in the row individually when the timer fires?
View 3 Replies