[Solved] Changing RadGrid Header Template Text at Runtime

[Sourab]

Hi all,

I have a requirement to change the header text at runtime.
I have one gridtemplate column like the following:

 <radG:GridTemplateColumn DataField="id" HeaderText="ID" SortExpression="id"
                        UniqueName="id">
                       
                        <EditItemTemplate >
                            <asp:TextBox ID="Txtid" runat="server" Text='<%# DataBinder.Eval(Container.DataItem,"Id") %>' style="position: static" OnTextChanged="Txtid_TextChanged" AutoPostBack="true"></asp:TextBox>
                            <asp:ImageButton ID="MediaIDLookup" runat="server" BorderStyle="Solid"
                                Height="18px" ImageUrl="~/Images/magnifier.gif" Style="position: static" Width="21px" OnClick="IDLookup_Click" />
                     
                            </EditItemTemplate>
                        <ItemTemplate>
                            <asp:Label ID="Lblid" runat="server" Width="120px" Text='<%# DataBinder.Eval(Container.DataItem,"Id") %>'></asp:Label>
                        </ItemTemplate>
                        <HeaderStyle ForeColor="Black" />
                    </radG:GridTemplateColumn>

when i click the image button, a new web page opens , i get the value from new page and i need to change the header text of the id column to new value that i picked from new page.

Pls advice how to do that.

[Daniel]

Hello Sourab,

For example you can modify the header item on Page_PreRender:

protected void Page_PreRender(object o, EventArgs e)
{
    GridHeaderItem headerItem = RadGrid1.MasterTableView.GetItems(GridItemType.Header)[0] as GridHeaderItem;
    headerItem["myTemplateColumn"].Text = "MODIFIED";
}

Regards,
Daniel
the Telerik team

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[Clive Hoggar]

HiI

I am using a vb version of this with the same gridtemplate column scenario, but I can't get it to to actually change the
column header text. The only thing I can think of is that the grid is within a RadAjaxPanel. Is this a problem
for this method? Can someone advise how do I get round it?

Protected Sub Page_PreRender(ByVal o As Object, ByVal e As EventArgs)
        Dim headerItem As GridHeaderItem = TryCast(RadGrid1.MasterTableView.GetItems(GridItemType.Header)(o), GridHeaderItem)
        headerItem("PricePerBottle").Text = "test"
    End Sub

The page has a MasterPage but there are no grids in the MasterPage to confuse things.

Thanks

Clive

P.S I assume the '0' in the code should be 'o' but I tried it with both anyway

[Shinu]

Hi Clive,

The above given code must be working fine. Can you confirm whether the RadGrid ID that you have specified in the code behind is same as that mentioned in the aspx declaration.

You may also give a try with the following code approach and see if it works.

VB:

    Protected Sub Page_PreRender(ByVal o As Object, ByVal e As EventArgs)

        For Each headerItem As GridHeaderItem In RadGrid1.MasterTableView.GetItems(GridItemType.Header)
            headerItem("PricePerBottle").Text = "MODIFIED"

        Next
    End Sub

Thanks

Shinu