Can't Update Bound DataGridView?
Oct 15, 2008
I have a datagridview bound to a table adapter. It displays data just fine. Part of this data is a comments field. When a user wishes to edit this I open a seperate form with the data in a a text box. After the user edits this text, how do I update the database / datagridview?
I can update the datagridview cell's value but that doesn't propagate to the database until the focus is removed from the row. I tried BeginEdit and then EndEdit (which should commit) but apparently it needs to move to another row!
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Dec 12, 2010
If using a datagridview to update a database and the datagridview is bound to a bindingsource which has its datasource as the table to be updated: where dshould you place the tableadapter.update(mydatarow)
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Mar 21, 2012
I have a DataGridView bound to a DataTable. Although all rows are displayed in the grid, the table represented by the Grid's DataSource does not get updated after changing values in one or more DataGridView columns. Both grid and table contain a Primary Key. What am I missing here? Do I need to do something in the RowValidated event?
dgvCriticalContacts.AutoGenerateColumns = False
Dim ccRs As DataTable = Common.OpenRecordset("SELECT * FROM PhoneList")
dgvCriticalContacts.DataSource = ccRs
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Sep 22, 2009
How to update data in a table bound to a datagridview? Using Visual Basic 8.
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Dec 17, 2011
I have a DataGridView bound to a data table. I have one column where I permit updates. After I fill the table (at form load), I make an update to this column Then I attempt to update the change back to the bound table. I get the error 'Update requires a valid Updatecommand when passed dataRow collection with modified rows'. I have seen some examples on-line to define, load, and update but since I have the generated datagridview with bindings, shouldn't the update method me a simple 1-liner? [Code]
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Jun 2, 2009
I have a DataGridView to which I've set a list of objects to the DataSource. (I'm in VS 2005 using VB.) I created the DataGridView by creating a Data Source of type AssetIdentifier and dragging that Data Source onto my form. I want to update the DataGridView when the selection in either a combo box or another DataGridView changes. (Below I'm considering a click in another DataGridView.)
The following works:
Public Class dlgShowAssets
' class member variable
Private assetIdList As List(Of AssetIdentifier)
' pertinent subs and functions
Private Sub RefreshAssetIdentifierDataGridView()
[Code] .....
In this case, I always knew that assetIdList would have at least one element. I'd update the list, and reset the data source of the DataGridView to that list, and all was well. When I applied this to another situation, for which I couldn't guarantee that the list would have at least one element, things would work fine as long as I had at least one element in the list, but if the list became empty, the DataGridView threw System.IndexOutOfRangeException a number of times.
The rows in the DataGridView would not go away if I went from a non-zero number of elements to zero. I tried a workaround, which was to remove all of the elements, add one "dummy" element, and then re-bind the list to the control and it still didn't work. Also, following all of those exceptions, I'd get other similar exceptions when I hovered over the cells in the DataGridView. Some of the members of AssetIdentifier were "Nothing" but I fixed that in the constructor, and the exceptions still occur.
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Jun 3, 2011
i have an datagridview bound to an access database, the table is empty so i want to use the datagridview to insert and update data to the database.so if i enter a complete row of data, i have an update button that looks like this
vb Private Sub Button3_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button3.Click Dim tableAdapter As HEALTHDataSetTableAdapters = New HEALTHDataSetTableAdapters.HEALTHDATATableAdapter()
tableAdapter.Update(HEALTHDataSet)
End Sub
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Mar 12, 2009
How do you insert/update in a datagridview which is 2 table is bound into it (inner join statement)Best Regards,Iannoob vb programmer
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Jun 4, 2010
I have a DataGridView that is bound to a DataSet I created from a database table named Contacts. The Contacts table contains a field called StatusId. StatusId is a foreign key to a table called Status. The Status table contains StatusId and StatusName.
[Code]...
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Mar 15, 2011
I have a DataGridView (dgv) on a Windows form (VB.NET) which is bound to a datatable. One of the bound columns is a an ID (Foreign Key) to another datatable. All I want to do is Hide the ID column and populate an unbound column with the Name (ParmName) for the user. I searched the foreign value in the datatable and retrieved the information. I set the Value of the cell in the Datarow. All works well, but does not display. The cell accepts the value...I can even Debug.Print the values to the console. They are there just nothing displaying in DataGridView. Nothing odd about DataGridView. Should be straight forward...
My Code
,
Dim dtParm As DataTable = MyDataSet.tblParameter
Dim dgv As DataGridView = Me.dgvResultNum_DataGrid
[code]....
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Dec 4, 2009
I have a few classes, one is a form, the other is the source of the datagridview. I want to be able to sort the columns of the datagridview by clicking on the header. Here are the classes that I am dealing with:
Imports DiscoveryByte.AddTools.Misc_Tools
Public Class ViewDiscoveryFlashCards
Private DBBindingSource As New BindingSource
[code].....
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Jul 9, 2010
There is something strange going on with my datagridview.
I've a data adapter that fills the underlying data table from a database. Then I assign this datatable as datasource to the datagridview Then I add a row to the datagridview and immediately I need to update the table in my database (as soon as user leaves the newly created row).
At this moment I have more rows (+2, not +1) in my datagridview than in the underlying datatable (the new row doesn't exists yet in it so the data adapter .Update method doesn't write anything to the database).
When DataGridView's .RowLeave event fires the undelying datatable is not yet updated. I've a question - is this behavior normal?
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Apr 30, 2011
On a Windows form I have a checkbox bound to a datatable. In the CheckedChanged event I do .EndEdit on the bindingsource and then .Update on the tableadapter. At runtime this gives an error: "Data Table internal index is corrupted: '5'.
If I change to the Validated event, there is no error, but the new state is not sent to the data base untill focus is subsequently lost, which is a problem. So how am I supposed to get the new state of the checkbox written to the database when the checkbox state changes?
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Sep 29, 2009
I don't think this can be that hard but I just can't get my head on it. I have a connection to an Access DB, put three text boxes representing three columns in the DB. Using the DataNavigator everything works. But what I want is to be able to enter text in say textbox1 and have textbox2 and 3 update, like when using the navigator.
Add: I want this to function like when you enter a record number in the Navigator and hit Enter, bam, goes to that record and all the text boxes update. I want to enter a number in textbox1...
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Jan 6, 2012
The GridView is bound to an Access Table, but I want to update the checkbox using the asp:ButtonField. The best I've been able to do is replace the checkbox with a string value. Below is the code I have now:
Protected Sub GridView1_RowCommand(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.GridViewCommandEventArgs) Handles GridView1.RowCommand
If e.CommandName = "check" Then
'Enable Editing on the GridView
[code]....
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Apr 12, 2011
I have written some functions that I have in a module. In one of the functions I would like to update a table that is in a dataset. I would like to do this with this function and not from a form class where the table could be bound. I need to call the function from various places in the application.
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Sep 13, 2011
I have two datagridview's both are databound. First one shows items for sale and the second stores all the items that were sold. I am trying too transfer selected rows from one to the other but no matter what I keep getting told "Rows cannot be programmatically added to the DataGridView's rows collection when the control is data-bound."
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Oct 23, 2010
I am trying to transfer the entire contents of an unbound datagridview (excluding the headers) to the next row of a bound datagridview. This is what I have so far but I'm not sure if I'm on the right track or not.
vb.net
Dim rowcount As Integer = dgv1.Rows.Count
dgv2.SelectAll()
[code].....
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Aug 29, 2010
I have bound an array of a class with 3 public strings.
When I run the form app and in the form load call I bind the array to the DGV all works fine and the DGV is fully populated. However, if I change an item in the array I had expected it to change in the DGV.. it doesn't. Or rather, it only updates if I click on the cell that should have changed.
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Aug 11, 2010
I have a form that contains a datagridview control that is bound to a dataset in design mode. This form contains various other textboxes and combobox controls as well and allows users to create and view Work Orders. It also has a Button control ("New W/O"), that when pressed will clear all values from all the controls on the form. My problem is that it's not removing the rows of data in the dgv. The code that I used to try and clear out the dgv is[code]...
How can I reset the dgv to retain it's default column headers but remove all the rows for the selected W/O?
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Aug 1, 2011
For example; I have a DataGridView bound to a MYSQL Database. There are two string columns "Name" and "Gender". I need to make the "Gender" column a ComboBox where they can select "Male" or "Female".
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Apr 9, 2012
Okay so I have a datagridview that is bound to a dataset. I have a column called type is a string char of either C, R, A, or V. The problem is that I want to sort the datagridview rows using that column and do so in the order I just gave so I want rows with C on top and then R and then A and then V. Because these aren't alphabetical, how could I sort the items this way? I did look into the icomparer, but really wasn't able to figure out how that works.
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Jun 2, 2011
Has anyone here tried putting a combobox to a bound datagridview? The selected value of the combobox will depend on the value of the corresponding column in the database.
I have a datagridview. When the user clicks the edit button, the application fetches the records from the database and binds it to the datagriview. But I want to show the Gender Column as combobox with selectable 'Male' and 'Female' values.
How could I add a combobox to bound datagridview?
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Sep 23, 2010
I have a datagridview bound to a datatable and i want to add a line to it. I cannot add al ine to the dgv, because it is bound so i add the line to the datatable using Me.BurdensCRMDataSet.dtlines.Rows.Add() however this seems to add two rows - let me explain a little further: A dgv always seems to have what i would call a 'blank next' row, a blank row at the end of the dgv, which as soon as the user populates with data another blank row appears after that - maintaining this 'blank next' row provides a simple and easy way for users to keep manually adding data to a dgv
This also seems to work fine when the dgv is bound to a datatable, an empty dgv would have 1 row (the 'blank next' row) and the datatable would have 0 rows, each time the user populates the 'blank next' in the dgv it is added to the datatable and a 'blank next row is added to the dgv, so the dgv now has 2 rows and the datatable has 1 - and so on and so forth However, I cannot programatically populate this 'blank next' row on the datatable, because it doesn't exist yet in the datatable, only in the dgv and if I programatically populate it in the dgv it isn't added to the datatable and a 'blank next' row isn't added to the dgv
[Code]....
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Feb 23, 2011
I am trying to use a bound datagridview and through the add button on the bindingnavigator adding a new row to the bindingsource and then pass two variables to the datagridview in the new row so they can be associated with the proper ids. I then have a save button for when the end user is done inputting the rest of the data for that record.
The code is below:
Private Sub BindingNavigator1AddItem_Click(ByVal sender As System.Object, ByVal e As System.EventArgs)
AddressesBindingSource.AddNew()
AddressesDataGridView.CurrentRow.Cells("caseNumber").Value = Me.CaseNumberTextBox
AddressesDataGridView.CurrentRow.Cells("interestID").Value = Me.InterestIDTextBox
End Sub
I am attempting to convert and Access CMS to VB and possibly vb.net.
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Jul 25, 2009
I am creating a DataSet:
objSQLCEConnection.Open()
objSQLCEDataAdapter.Fill(objSQLCEDataSet, sSQLCETableName)
Then populating a DataGridView with the data:
DataGridView1.DataSource = objSQLCEDataSet.Tables(sSQLCETableName).DefaultView
I have a string field, EventAction, that is in the database.I want that column to be a combobox column.I want to add the different EventActions to the list and let the user select the action they desire.
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Oct 18, 2010
I have a List of an object, set to DataSource of a BindingSource, set to DataSource of a DataGridView. Then I added a DataGridViewButtonColumn which I want a click to remove that record from the collection. So I simply call collection. RemoveAt (e.rowIndex) from the DataGridView CellClick event. However this produces an IndexOutOfRange Exception; "1 does not have a value"..
So is happening here? I have maybe a vague idea, but would like to understand exactly which events are failing etc.. and what do i need to do to perform this action properly?
EDIT: This seems not to happen if I use a BindingList.. But when using a List, I get this problem..
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Aug 15, 2010
I am using Visual Basic 10/I have 2 datagridview tables. The main datagridview can be edited by the user; adding/removing rows, changing data in text/combo columns, sort, etc. 2 columns from the second datagridview are a carbon copy of 2 columns from the main datagridview. I have achieved this by binding both datagridviews to a dataset. So that when I edit the main datagridview the effects are automatically replicated in the second datagridview.
Before I bound the datagridviews to the dataset I had a fully functional system to save the content of the datagridview to a text file and read it back in. This has now stopped working with the error message 'Can't edit a bound datagridview programmatically'.
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Feb 9, 2012
I have a dgvAssetsSummary which holds data queried from the database, it hold's the AssetType column and Total column, it's grouped by AssetType, giving a summary of all the totals and what assettype they belong to.I'd like the Total column to be formatted so that there are no decimals and with commas, at present each total has four decimal places and no commas, this needs to be able to be read easily by clients. I've tried using the following code to format the column after I query the database, but to no avail.
dgvAssetsSummary.Columns("Total").DefaultCellStyle.Format = "#,#"
how to do this, I've had a bit of a look around but I can't find much. I'm currently looking at a couple of pages from the msdn library about it.
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Sep 22, 2011
I have a datagridview created for my windows form using 2005 and I'm debating which would be the best way to allow my users to save the records.
The datagridview contains a Delete Checkbox so if that's checked, I need to delete the record. They will never be inserting new records - just updating or deleting them.
Do you think it's best to give them a Save button and when it's clicked, save the records; or rather, have it auto-save after each modification. I'm not sure how this would work in conjunction with my Delete checkbox though.
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