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09/16/2009 at 01:32PM PDT, ID: 24737837

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6.4

RowDataBound error - Unable to cast object

Asked by -Dman100- in Programming for ASP.NET

Tags: asp.net gridview

I am trying to programmatically reference the delete linkbutton in a gridview using the RowDataBound event handler.

I'm getting the following error message:

Unable to cast object of type 'System.Web.UI.LiteralControl' to type 'System.Web.UI.WebControls.LinkButton'

Is the error getting thrown because my gridview in inside a panel and I need to use FindControl?

See below for my code.

Thanks for any help.

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             aspx UI code:
 
<asp:Panel runat="server" ID="pnlView">
                    <asp:Button 
                        runat="server" 
                        ID="btnAddNewQuote" 
                        Text="Add New Quote" 
                        onclick="btnAddNewQuote_Click" />
                    <asp:GridView 
                        ID="GridView1" 
                        runat="server" 
                        AutoGenerateColumns="False" 
                        DataKeyNames="quote_id" 
                        DataSourceID="ObjectDataSource1" 
                        BackColor="Beige" 
                        CellPadding="5" 
                        Style="font-family:verdana;font-size:8pt" CaptionAlign="Top" 
                        onrowdatabound="GridView1_RowDataBound">
                        <AlternatingRowStyle BackColor="#eeeeee" />
                        <HeaderStyle BackColor="ivory" Font-Bold="true" />
                        <Columns>
                            <asp:BoundField DataField="quote_author" HeaderText="Author" 
                                SortExpression="quote_author" HtmlEncode="false" >
                            <ControlStyle Width="200px" />
                            <ItemStyle Width="200px" />
                            </asp:BoundField>
                            <asp:BoundField DataField="quote_text" HeaderText="Quote" 
                                SortExpression="quote_text" HtmlEncode="false" >
                            <ControlStyle Width="600px" />
                            <ItemStyle Width="600px" />
                            </asp:BoundField>
                            <asp:CommandField ShowDeleteButton="True" ShowEditButton="True" 
                                ButtonType="Button" >
                            <HeaderStyle Width="150px" />
                            </asp:CommandField>
                        </Columns>
                    </asp:GridView>
                </asp:Panel>
 
aspx.cs code-behind:
 
protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
    {
        if (e.Row.RowType == DataControlRowType.DataRow)
        {
            LinkButton lb = (LinkButton)e.Row.Cells[2].Controls[1];
 
            lb.OnClientClick = string.Format("return confirm('Are you certain you want to delete this quote?')");
        }
    }

           
         

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RowDataBound error - Unable to cast object

Asked by -Dman100- in Programming for ASP.NET

Tags: asp.net gridview

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