C# - RadGrid Column Editable On Insert But Set To Readonly On Update?

Nov 6 10 at 1:56

I have a RadGrid which has a column like:

<telerik:GridTemplateColumn HeaderText="Car" >
<ItemTemplate>
<asp:Label ID="MakeLabel" runat="Server" Text='<%# Eval("Make") %> />
</ItemTemplate>
<EditItemTemplate>
<asp:TextBox ID="MakeTextBox" runat="Server" Text='<%# Bind("Make") %> />
</EditItemTemplate>
</telerik:GridTemplateColumn >

and I'm wanting to set it up so that this column will allow input when inserting new values but won't when updating values.

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Forms Data Controls :: How To Update Row On Editable Gridview Depending On Two Column

Jun 29, 2010 10:54 AM

Solved like this

currentID = Convert.ToInt32(GridView_ABC.DataKeys[0].Values[0]);
activityName = Convert.ToString(GridView_ABC.DataKeys[1].Values[1]);
DataRow row =
originalDataTable.Select(String.Format("EmployeeID = {0} AND ActivityName = '{1}'", currentID, activityName))[0];

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Jul 22 10 at 17:30

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Feb 9, 2009, 13:23

I have a gridview.I modified the gridview to display 2 dropdowns instead of a textbox when editing.(the 1st and last columns)When I edit the grid (with my edit button), everything shows up fine, textboxes and dropdown where supposed to. The problem is if I make a change in a value. When I hit "update", I get an error:

"Cannot insert the value NULL into column 'PagTipoID', table MPLServicos.dbo.tblPagamentos'; column does not allow nulls. Update fails. The statement has been terminated".

I understand the error. I just don't understand what to do to correct this.Why can't the grid get the seleccted value of the dropdown from the 1st column? (the one originating the problem).

My code.VBNET Code:
<asp:UpdatePanel ID="UpdatePanel4Grid" runat="server">
<ContentTemplate>
[code]...

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<asp:TemplateField HeaderText="Description">
<ItemTemplate>
<%# ValidateString(Container.DataItem("Description")) %>

[code]...

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foreach(DataColumn column in dataView.Table.Columns)
{
datagrid.Columns.Add(new BoundColumn {
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}
datagrid.DataSource = dataView;

This works fine. Why can't .NET do this with AutoGenerateColumns?

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[code]....

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Radgrid code

<telerik:RadGrid ID="RadGrid1" runat="server" AutoGenerateColumns="False" AutoGenerateDeleteColumn="True"
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DataMember="DefaultView">[code]....

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[Code]....

But I can't do this:

[Code]....

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[code]....

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[code]...

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code

protected void UpdateButton_Click(object sender, EventArgs e) { originalDataTable = (DataTable)ViewState["originalValuesDataTable"]; foreach (GridViewRow r in GridView_ABC.Rows) if (IsRowModified(r)) { GridView_ABC.UpdateRow(r.RowIndex, false); } // Rebind the Grid to repopulate the original values table. tableCopied = false; GridView_ABC.DataBind(); }

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[Code]....

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[Code]....

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