Overwrite values when using gridview Edit?
- by sah302
I am using a GridView which is bound to a LinqDataSource and using the automatic edit and delete buttons. However, I don't want the user to edit two of the columns manually, but done automatically. Specifically username who last updated the entry, and the date it was updated.
The gridview only contains 3 columns: Name, Date modified, last updated by. Right now when the user clicks the edit button they can only edit the name column (other two set to read-only). Upon clicking the update button, I want the other 2 fields to update as well based on some extra code. I thought this was done in the code behind within the event rowUpdating, but it doesn't seem to work.
My gridview:
<asp:GridView ID="gvNewsSources" runat="server" AutoGenerateColumns="False"
DataSourceID="ldsNewsSource" AutoGenerateDeleteButton="True"
AutoGenerateEditButton="True" CellPadding="4" ForeColor="#333333"
GridLines="None" DataKeyNames="Id">
<RowStyle BackColor="#F7F6F3" ForeColor="#333333" />
<Columns>
<asp:BoundField DataField="Name" HeaderText="Name" SortExpression="Name" />
<asp:BoundField DataField="LastUpdatedBy" HeaderText="Last Updated By"
SortExpression="LastUpdatedBy" ReadOnly="True" />
<asp:BoundField DataField="DatedModified" HeaderText="Dated Modified"
SortExpression="DatedModified" ReadOnly="True" />
</Columns>
<FooterStyle BackColor="#5D7B9D" Font-Bold="True" ForeColor="White" />
<PagerStyle BackColor="#284775" ForeColor="White" HorizontalAlign="Center" />
<SelectedRowStyle BackColor="#E2DED6" Font-Bold="True" ForeColor="#333333" />
<HeaderStyle BackColor="#5D7B9D" Font-Bold="True" ForeColor="White" />
<EditRowStyle BackColor="#999999" />
<AlternatingRowStyle BackColor="White" ForeColor="#284775" />
</asp:GridView>
My code behind:
Partial Class _Default
Inherits System.Web.UI.Page
Protected Sub gvNewsSources_RowUpdating(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.GridViewUpdateEventArgs) Handles gvNewsSources.RowUpdating
e.NewValues("LastUpdatedBy") = GetUser.GetUserName
e.NewValues("DateModified") = Date.Now()
lblOutput.Text = e.NewValues("DateModified").ToString()
End Sub
End Class
Yet when I run through this, I get no errors, but the values aren't being updated in the database or in the gridview. I ran through debug mode and the new values dictionary starts at 1 and ends up being 3 by the end of the rowUpdating event and the value is being set (tested by output the newValue of Datemodified), but it isn't saving.
What am I doing wrong?
