GridView Update Event error

See more:

ASP.NET

Hi!

I've have a gridview on my site:

<asp:GridView ID="GridView1" runat="server" AlternatingRowStyle-CssClass="gridview_alter"
                        AutoGenerateColumns="False" EmptyDataText=" " GridLines="None" OnRowCancelingEdit="RowCancelingEdit"
                        OnRowDataBound="GridView1_RowDataBound" OnRowDeleting="RowDeleting" OnRowEditing="RowEditing"
                        OnRowUpdating="RowUpdating" ShowHeaderWhenEmpty="True" Width="820px">
                        <AlternatingRowStyle CssClass="gridview_alter" />
                        <Columns>
                            <asp:TemplateField HeaderText="Leírás" Visible="false" />
                            <asp:BoundField DataField="Description" HeaderStyle-Width="150" HeaderText="Leírás" HtmlEncode="false">
                                <HeaderStyle Width="150px" />
                            </asp:BoundField>
                            <asp:BoundField HeaderText="Kritérium" DataField="IndexNumber" />
                            <asp:BoundField DataField="Weight" HeaderStyle-Width="50" HeaderText="Súly">
                                <HeaderStyle Width="50px" />
                            </asp:BoundField>
                            <asp:TemplateField HeaderStyle-Width="100" HeaderText="Cél típusa">
                <EditItemTemplate>
                        <asp:DropDownList ID="DropDownList1"
                        runat="server" AutoPostBack="False">
                    </asp:DropDownList>
                </EditItemTemplate>
                                <ItemTemplate>
                                    <asp:Label ID="lblGoalType" runat="server"></asp:Label>
                                </ItemTemplate>
                                <HeaderStyle Width="100px" />
                            </asp:TemplateField>
                            <asp:CommandField DeleteText="Törlés" HeaderStyle-Width="60" ShowDeleteButton="true">
                                <HeaderStyle Width="60px" />
                            </asp:CommandField>
                                        <asp:CommandField CancelText="Mégse" DeleteText="Törlés" EditText="Szerkesztés"
                                            HeaderStyle-Width="60" ShowEditButton="True" UpdateText="Frissítés"
                                            ValidationGroup="Leírás, Súly">
                                <HeaderStyle Width="60px" />
                            </asp:CommandField>
                        </Columns>
                    </asp:GridView>

The "Cél típusa" column gets data from a list, that contains 1, 2 or 3. In code behind:

protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
{
    if (e.Row.RowType == DataControlRowType.DataRow)
    {
        Goal row = (Goal)e.Row.DataItem;
        Label lblGoalType = (Label)e.Row.FindControl("lblGoalType");

        e.Row.Cells[0].Text = e.Row.Cells[0].Text.Replace("\n", "<br />");

        switch (row.GoalTypeId)
        {
            case 1:
                lblGoalType.Text = "Személyes";
                break;
            case 2:
                lblGoalType.Text = "Egyéni";
                break;
            case 3:
                lblGoalType.Text = "Szervezeti";
                break;
        }
    }
    if (e.Row.RowType == DataControlRowType.DataRow)
    {
        // reference the Delete LinkButton
        LinkButton db = (LinkButton)e.Row.Cells[5].Controls[0];
        db.OnClientClick = "return confirm('Biztos benne, hogy törölni akarja a kiválasztott célt?');";
    }
}

I give strings to the specified numbers.
My problem is that I need to update the cells with a dropdownlist, but when u press the Edit button on the gridview i get an error msg: Object reference not set to an instance of an object.

I am stuck here, got no idea, please help.