RowDataBound error - Unable to cast object

Hi TheLearnedOne,

I think I see the problem.  I'm using commandfield instead of itemtemplates with a linkbutton control.

Is there a way to reference the commandfield in the RowDataBound event?

Actually, it does not appear to be the commandfield that is causing the problem.

I changed the cell index to the following:

protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
    {
        if (e.Row.RowType == DataControlRowType.DataRow)
        {
            LinkButton lb = (LinkButton)e.Row.Cells[2].Controls[2];

            lb.OnClientClick = string.Format("return confirm('Are you certain you want to delete this quote?')");
        }
    }

I recieved the following error message now:

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

There is a literal control between the edit and delete buttons so '2' should be the correct index?

I discovered that the delete command field is referenced as a IButtonControl, but I'm unable to cast to a LinkButton.

protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
    {
        if (e.Row.RowType == DataControlRowType.DataRow)
        {
            IButtonControl ibc = (IButtonControl)e.Row.Cells[2].Controls[2];

            LinkButton lb = (LinkButton)ibc;

            lb.OnClientClick = string.Format("return confirm('Are you certain you want to delete this quote?')");
        }
    }

I would think that you could cast that as Button, since I don't think that it is a LinkButton.

It does not appear the IButtonControl can be cast.  I was trying the following to get a simple delete confirm to work on my gridview.

I don't generated any errors, but the javascript never fires.

see the code below.

Any suggestions?

protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
    {
        if (e.Row.RowType == DataControlRowType.DataRow)
        {
            IButtonControl ibc = (IButtonControl)e.Row.Cells[2].Controls[2];
 
            ibc.Click += new EventHandler(ibc_Click);
        }
    }
 
    protected void ibc_Click(object sender, EventArgs e)
    {
        StringBuilder sb = new StringBuilder();
        sb.Append("return confirm('Are you sure you want to delete this quote?')");
        //string.Format("return confirm('Are you certain you want to delete this quote?')");
        Type t = this.GetType();
        if (!ClientScript.IsClientScriptBlockRegistered(t, "PopupScript"))
            ClientScript.RegisterClientScriptBlock(t,"PopupScript", sb.ToString());
 
    }

                                              

1:
2:
3:
4:
5:
6:
7:
8:
9:
10:
11:
12:
13:
14:
15:
16:
17:
18:
19:
20:

Does that mean that you tried Button, and failed?

DataControlButton inherits from Button, so you should be able to cast:

Button ibc = (Button)e.Row.Cells[2].Controls[2];

You are correct.  I could cast as a button and get a reference.  The delete confirm works, but I'm wonderin why when I click okay, the delete does not occur now?  It worked fine before.

Hmmm...that is a great question!!

You are returning a 'true' from the 'confirm'...

I know that this works:

<asp:GridView ID="GridView1" runat="server" DataKeyNames="id" DataSourceID="SqlDataSource1">
<Columns>
   ...
   <asp:TemplateField ShowHeader="False">
     <ItemTemplate>
       <asp:LinkButton ID="LinkButton1" runat="server" CausesValidation="False" CommandName="Delete"
                    OnClientClick='return confirm("Are you sure you want to delete this entry?");'
                    Text="Delete" />
     </ItemTemplate>
   </asp:TemplateField>
</Columns>
</asp:GridView>

yes, it is very odd.  If I remove the return from the confirm statment, it will delete, but, it will delete when you click both okay or cancel.  I don't see anything incorrect with the confirm statement, but the return return keyword seems to be causing the problem.

Interesting...I got to work by changing the  confirm statement to the following:

protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
    {
        if (e.Row.RowType == DataControlRowType.DataRow)
        {
            Button btn = (Button)e.Row.Cells[2].Controls[2];

            btn.OnClientClick = string.Format("if (!confirm('Are you sure you want to delete this quote?')) return false;");
        }
    }