Editable gridview is not working

[Mimeshiff]

I have an editable gridview which the user can edit each row just by pressing linkbutton. I am getting an error and it stops my work. please help me.HTML\[code\]<asp:GridView ID="gvList" runat="server" class="gv" CellPadding="2" Font-Names="Calibri" ForeColor="#333333"Font-Size="16px" Width="500px" AutoGenerateColumns="true" OnRowCancelingEdit="gvList_RowCancelingEdit"OnRowEditing="gvList_RowEditing" OnRowUpdating="gvList_RowUpdating"> <Columns> <asp:TemplateField HeaderText="User Name" HeaderStyle-ForeColor="White" HeaderStyle-Font-Bold="true" ItemStyle-Width="170px"> <ItemTemplate> <asp:Label runat="server" ID="lblUsername" Text='<%# Eval("cUserName") %>'></asp:Label> </ItemTemplate> <EditItemTemplate> <asp:TextBox ID="Editusername" runat="server" Text='<%# Eval("cUserName") %>'></asp:TextBox> </EditItemTemplate> </asp:TemplateField> <asp:TemplateField HeaderText="Dept User" HeaderStyle-ForeColor="White" HeaderStyle-Font-Bold="true" ItemStyle-Width="170px"> <ItemTemplate> <asp:Label runat="server" ID="lblDept" Text='<%# iif(Eval("lDeptUser"),"Yes","No") %>'></asp:Label> </ItemTemplate> <EditItemTemplate> <asp:RadioButtonList ID="RadioButtonList1" runat="server" > <asp:ListItem>Yes</asp:ListItem> <asp:ListItem>No</asp:ListItem> </asp:RadioButtonList> </EditItemTemplate> </asp:TemplateField> <asp:TemplateField HeaderText="Actions" HeaderStyle-ForeColor="White" HeaderStyle-Font-Bold="true" ItemStyle-Width="160px"> <ItemTemplate> <asp:LinkButton ID="btnedit" CommandName="Edit" runat="server" Text="Edit" /> <asp:LinkButton ID="btnDelete" CommandName="Delete" runat="server" Text="Delete" /> </ItemTemplate> <EditItemTemplate> <asp:LinkButton ID="btnUpdate" CommandName="Update" runat="server" Text="Update" /> <asp:LinkButton ID="btnCancel" CommandName="Cancel" runat="server" Text="Cancel" /> </EditItemTemplate> <HeaderStyle Font-Bold="True" ForeColor="White"></HeaderStyle> <ItemStyle Width="120px"></ItemStyle> </asp:TemplateField> </Columns> <EmptyDataTemplate> No records available </EmptyDataTemplate> <HeaderStyle BackColor="#808380" Font-Bold="True" ForeColor="White" VerticalAlign="Top" /> <EditRowStyle BackColor="#2461BF" /> <AlternatingRowStyle BackColor="#E3E3E3" /> </asp:GridView>\[/code\]VB\[code\]Protected Sub gvList_RowUpdating(sender As Object, e As System.Web.UI.WebControls.GridViewUpdateEventArgs) Handles gvList.RowUpdating Dim oldname = DirectCast(gvList.Rows(e.RowIndex).FindControl("lblUsername"), Label) Dim username As String = DirectCast(gvList.Rows(e.RowIndex).FindControl("Editusername"), TextBox).Text Dim tempUser = DirectCast(gvList.Rows(e.RowIndex).FindControl("RadioButtonList1"), RadioButtonList).SelectedIndex Dim query As String = "Update Intranet.dbo.Gn_ISCoordinators SET cUserName=@uname" + ",lDeptUser=@dept WHERE cUserName=@oldName" Using con = New SqlConnection(ConfigurationManager.ConnectionStrings("IntranetConnectionString").ConnectionString) con.Open() Dim cmd = New SqlCommand(query, con) cmd.Parameters.AddWithValue("@uname", username) cmd.Parameters.AddWithValue("@dept", Convert.ToByte(tempUser)) cmd.Parameters.AddWithValue("@oldname", oldname) cmd.ExecuteNonQuery() End Using gvList.EditIndex = -1 GetList()End Sub\[/code\]The problem is on the \[code\]cmd.ExecuteNonQuery()\[/code\] it gives me \[code\]The parameterized query '(@uname nvarchar(7),@dept tinyint,@oldname nvarchar(4000))Update' expects the parameter '@oldname', which was not supplied.\[/code\]Any thing wrong in my query?