[มือใหม่]ติดปัญหาการเช็ค Session Status กับการเปลี่ยน Textbox ครับ ต้องการเปลี่ยน readonly เป็น False เมื่อ user ที่เข้ามาเป็น Admin ครับ

<asp:CommandField ItemStyle-HorizontalAlign="center" ControlStyle-Width="70px" ButtonType="Button" ControlStyle-CssClass="btn btn-info" ShowEditButton="true" CancelText="Cancel" DeleteText="Delete" EditText="Edit" UpdateText="Update" HeaderText="Modify"/>
                                         <asp:CommandField ButtonType="Button" ControlStyle-CssClass="btn btn-danger" ShowDeleteButton="true" HeaderText="Delete" ItemStyle-Width="25px" />

                                        <asp:TemplateField HeaderText="Product">
                                            <ItemTemplate>
                                                <asp:Label ID="lbProduct" size="30" runat="server" Text='<%# DataBinder.Eval(Container, "DataItem.Product") %>'></asp:Label>
                                            </ItemTemplate>
                                           
                                            <EditItemTemplate>
                                                
                                                <asp:TextBox ID="txtEditProduct" ReadOnly="true" class="form-control" size="30" runat="server"  Text='<%# DataBinder.Eval(Container, "DataItem.Product") %>'></asp:TextBox>
                                            </EditItemTemplate>  
                                                          
                                        </asp:TemplateField> 



                                        <asp:TemplateField HeaderText="Seatsused">
                                            <ItemTemplate>
                                                <asp:Label ID="lbSeatsused" runat="server" Text='<%# DataBinder.Eval(Container, "DataItem.Seatsused") %>'></asp:Label>
                                            </ItemTemplate>
                                            <EditItemTemplate>
                                                <asp:TextBox ID="txtEditSeatsused" ReadOnly="true" class="form-control" size="10" runat="server" onkeydown = "return (!(event.keyCode>=65) && event.keyCode!=32);" Text='<%# DataBinder.Eval(Container, "DataItem.Seatsused") %>' ></asp:TextBox>
                                            </EditItemTemplate>
                                            
                                        </asp:TemplateField>




                                        <asp:TemplateField HeaderText="Seatsavailable">
                                            <ItemTemplate>
                                                <asp:Label ID="lbSeatsavailable" runat="server" Text='<%# DataBinder.Eval(Container, "DataItem.Seatsavailable") %>'></asp:Label>
                                            </ItemTemplate>
                                            <EditItemTemplate>
                                                <asp:TextBox ID="txtEditSeatsavailable" ReadOnly="true" class="form-control" size="10" runat="server" onkeydown = "return (!(event.keyCode>=65) && event.keyCode!=32);" Text='<%# DataBinder.Eval(Container, "DataItem.Seatsavailable") %>'></asp:TextBox>
                                            </EditItemTemplate>
                                            
                                        </asp:TemplateField>




                                        <asp:TemplateField HeaderText="Expired">
                                            <ItemTemplate>
                                                <asp:Label ID="lbExpired" runat="server" Text='<%# DataBinder.Eval(Container, "DataItem.Expired") %>'></asp:Label>
                                            </ItemTemplate>
                                            <EditItemTemplate>
                                                
                                                <asp:TextBox ID="txtEditExpired" ReadOnly="true" class="form-control" size="10" runat="server" onkeydown = "return (!(event.keyCode>=65) && event.keyCode!=32);" Text='<%# DataBinder.Eval(Container, "DataItem.Expired") %>'></asp:TextBox>
                                            </EditItemTemplate>
                                            
                                        </asp:TemplateField>




                                        <asp:TemplateField HeaderText="Overdeployed">
                                            <ItemTemplate>
                                                <asp:Label ID="lbOverdeployed" runat="server" Text='<%# DataBinder.Eval(Container, "DataItem.Overdeployed") %>'></asp:Label>
                                            </ItemTemplate>    
                                            <EditItemTemplate>
                                                <asp:TextBox ID="txtEditOverdeployed" ReadOnly="true" class="form-control" size="10" runat="server" onkeydown = "return (!(event.keyCode>=65) && event.keyCode!=32);" Text='<%# DataBinder.Eval(Container, "DataItem.Overdeployed") %>'></asp:TextBox>
                                            </EditItemTemplate>
                                           
                                        </asp:TemplateField>



                                        <asp:TemplateField HeaderText="Summary">
                                            <ItemTemplate>
                                                <asp:Label ID="lbWait" runat="server" Text='<%# DataBinder.Eval(Container, "DataItem.Wait") %>'></asp:Label>
                                            </ItemTemplate>
                                            <EditItemTemplate>
                                                <asp:TextBox ID="txtEditWait" ReadOnly="true" class="form-control" size="10" runat="server" onkeydown = "return (!(event.keyCode>=65) && event.keyCode!=32);" Text='<%# DataBinder.Eval(Container, "DataItem.Wait") %>'></asp:TextBox>
                                            </EditItemTemplate>
                                        </asp:TemplateField>
                                        </Columns>

protected void modEditCommand(object sender, GridViewEditEventArgs e)
        {



              myGridview.EditIndex = e.NewEditIndex;

              TextBox txtEditProduct = (TextBox)myGridview.Rows[myGridview.EditIndex].FindControl("txtEditProduct");
               txtEditProduct.ReadOnly = false; 

              myGridview.ShowFooter = false;    
              loadData();
        }