'ddlStatus' has a SelectedValue which is invalid because it does not exist in the list of items.

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C#

ASP.NET

<asp:TemplateField HeaderText="Status">
                                                    <ItemTemplate>
                                                        <asp:DropDownList ID="ddlStatus" runat="server" class="span3" ClientIDMode="Static"
                                                            placeholder="Status" Style="width: 70%" Text='<%# Eval("Status") %>'>
                                                        </asp:DropDownList>
                                                    </ItemTemplate>
                                                    <FooterStyle HorizontalAlign="Left" />
                                                    <HeaderStyle HorizontalAlign="Left" />
                                                    <ItemStyle HorizontalAlign="Left" />
                                                </asp:TemplateField>

Source Error:


Line 305: {
Line 306: gvUTestDetails.DataSource = dtAttachment;
Line 307: gvUTestDetails.DataBind();
Line 308: //btnClick.Style.Add("display", "none");
Line 309: }