I am currently in a dilemma with my gridview not returning a label, which is within a detailsview...
My C# code is:
protected void GridView1_SelectedIndexChanged(object sender, EventArgs e)
{
// get pet number for when removing a pet from reservation
int numberSelected = -1;
String numbertxt = "-1";
GridView gv1 = (GridView)sender;
GridViewRow rvRow = gv1.Rows[gv1.SelectedRow.RowIndex];
Label numberLbl = (Label)rvRow.Cells[0].FindControl("lblNumber");
// find selected index, and get number in column 0
// label within GridView1 within dvReservation DetailsView
numbertxt = numberLbl.Text;
...
Gridview:
<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False"
DataSourceID="dsObjGet"
OnSelectedIndexChanged="GridView1_SelectedIndexChanged">
<Columns>
<asp:TemplateField InsertVisible="False" ShowHeader="False">
<AlternatingItemTemplate>
<asp:Label ID="lblNumber" runat="server"
Text='<%# Eval("NUMBER") %>' Visible="False"></asp:Label>
</AlternatingItemTemplate>
<ItemTemplate>
<asp:Label ID="lblNumber" runat="server"
Text='<%# Eval("NUMBER") %>' Visible="False"></asp:Label>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField ShowHeader="False">
<AlternatingItemTemplate>
<asp:Label ID="lblName" runat="server" Text='<%# Eval("NAME") %>'>
</asp:Label>
</AlternatingItemTemplate>
<ItemTemplate>
<asp:Label ID="lblName" runat="server" Text='<%# Eval("NAME") %>'>
</asp:Label>
</ItemTemplate>
</asp:TemplateField>
<asp:CommandField SelectText="Remove" ShowSelectButton="True"
CausesValidation="False">
<ControlStyle CssClass="link" />
</asp:CommandField>
</Columns>
</asp:GridView>
When I breakpoint
Label numberLbl = (Label)rvRow.Cells[0].FindControl("lblNumber");
the label comes out as null (numberLbl)...
The message returned from the exception is: "Object reference not set to an instance of an object"
Pravesh Singh
18-Aug-2014