The GridView 'OrdersGridView' fired event RowDeleting which wasn't handled.

Question

I’m getting this error over and over again.

Loading the data into the GridView works, but when I want to delete a row I'm getting that error.

<asp:GridView ID="OrdersGridView" runat="server" AutoGenerateColumns="False" onrowdeleted="OrdersGridView_RowDeleted">
    <Columns>
        <asp:TemplateField HeaderText="Product Name">
            <ItemTemplate>
                <asp:HiddenField runat="server" ID="HiddenField1" Value='<%#Eval("oid")%>'></asp:HiddenField>
            </ItemTemplate>
        </asp:TemplateField>
        <asp:BoundField DataField="titel" HeaderText="Name" />
        <asp:BoundField DataField="oid" HeaderText="Itemno" />
        <asp:BoundField DataField="prijs" HeaderText="Price" />
        <asp:CommandField ButtonType="Link" CausesValidation="false" HeaderText="Update" ShowDeleteButton="True" />
        <asp:BoundField DataField="prijs" HeaderText="Subtotal" />
    </Columns>
</asp:GridView>

C# codebehind - I'm not really deleting the row from the database but it's a test:

protected void OrdersGridView_RowDeleted(object sender, System.Web.UI.WebControls.GridViewDeletedEventArgs e)
{
    if (e.Exception != null)
    {
        lblStatus.Text = e.Exception.ToString();
    }
    else 
    {
        string sValue = ((HiddenField)OrdersGridView.SelectedRow.Cells[1].FindControl("HiddenField1")).Value;
        lblStatus.Text = sValue;
    }
}

But after clicking, I get a bigass yellow page with the next error:

The GridView 'OrdersGridView' fired event RowDeleting which wasn't handled.

Answer 1

It looks like you are handling the "onrowdeleted" event, not the "RowDeleting" event

in your markup, change: onrowdeleted="OrdersGridView_RowDeleted"

to RowDeleting="OrdersGridView_RowDeleting"

Look a the docs for this event: you will also see that your handler's signature will need to change: http://msdn.microsoft.com/en-us/library/system.web.ui.webcontrols.gridview.onrowdeleting.aspx your new handler will look someting like this:

 protected void OrdersGridView_RowDeleting(object sender, System.Web.UI.WebControls.GridViewDeleteEventArgs e) { 
 if (e.Exception != null) { 
    lblStatus.Text = e.Exception.ToString(); 
   } 
   else 
   {
    string sValue = ((HiddenField)OrdersGridView.SelectedRow.Cells[1].FindControl("HiddenField1")).Value; lblStatus.Text = sValue; 
    } 
 }

the RowDeleting event happens, then the onrowdeleted event. The RowDeleting probally lets you Cancel the event.

Answer 2

Inside the if, set ExceptionHandled to true:

if (e.Exception != null)
{
    lblStatus.Text = e.Exception.ToString();
    e.ExceptionHandled = true;
}

Answer 3

anybody else a try ?