Grid view Row updating not working properly

protected void GridView1_RowUpdating(object sender, GridViewUpdateEventArgs e)
    {
        int ID = Convert.ToInt32(GridView1.DataKeys[e.RowIndex].Value.ToString());
        GridViewRow row = (GridViewRow)GridView1.Rows[e.RowIndex];
        TextBox Name = (TextBox)row.FindControl("TestName");
        TextBox Dep = (TextBox)row.FindControl("Dept");
        TextBox Pric = (TextBox)row.FindControl("Price");
        TextBox Typ = (TextBox)row.FindControl("Type");
        TextBox Statu = (TextBox)row.FindControl("Status");
        GridView1.EditIndex = -1;
        con.Open();
        SqlCommand cmd = new SqlCommand("update Test set TestName=@TestName,Dept=@Dept,Price=@Price, Type=@Type Status=@Status where ID=@ID", con);
        cmd.Parameters.Add("@ID", SqlDbType.Int).Value = ID;
        cmd.Parameters.Add("@TestName", SqlDbType.VarChar).Value = Name.Text.Trim();
        cmd.Parameters.Add("@Dept", SqlDbType.VarChar).Value = Dep.Text.Trim();
        cmd.Parameters.Add("@Price", SqlDbType.VarChar).Value = Pric.Text.Trim();
        cmd.Parameters.Add("@Type", SqlDbType.VarChar).Value = Typ.Text.Trim();
        cmd.Parameters.Add("@Status", SqlDbType.VarChar).Value = Statu.Text.Trim();
        cmd.ExecuteNonQuery();
        con.Close();
        Foo();
    }

<pre lang="xml"><asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="false"
           OnSelectedIndexChanging="GridView1_SelectedIndexChanging"
           onrowcommand="GridView1_RowCommand"
           onrowcancelingedit="GridView1_RowCancelingEdit"
           onrowdeleting="GridView1_RowDeleting" onrowediting="GridView1_RowEditing"
           onrowupdating="GridView1_RowUpdating" DataKeyNames="TestID">
           <Columns>
               <asp:TemplateField HeaderText="ID">
                   <ItemTemplate>
                       <asp:Label ID="lblTestID" runat="server" Text='<%# Eval("TestID") %>'></asp:Label>
                   </ItemTemplate>
               </asp:TemplateField>
               <asp:TemplateField HeaderText="Test Name">
                   <ItemTemplate>
                       <asp:Label ID="lblTestName" runat="server" Text='<%# Eval("TestName") %>'></asp:Label>
                   </ItemTemplate>
               </asp:TemplateField>
               <asp:TemplateField HeaderText="Department">
                   <ItemTemplate>
                       <asp:Label ID="lblDept" runat="server" Text='<%# Eval("Dept") %>'></asp:Label>
                   </ItemTemplate>
               </asp:TemplateField>
               <asp:TemplateField HeaderText="Price">
                   <ItemTemplate>
                       <asp:Label ID="lblPrice" runat="server" Text='<%# Eval("Price") %>'></asp:Label>
                   </ItemTemplate>
               </asp:TemplateField>
               <asp:TemplateField HeaderText="Type">
                   <ItemTemplate>
                       <asp:Label ID="lblType" runat="server" Text='<%# Eval("Type") %>'></asp:Label>
                   </ItemTemplate>
               </asp:TemplateField>
               <asp:TemplateField HeaderText="Status">
                   <ItemTemplate>
                       <asp:Label ID="lblStatus" runat="server" Text='<%# Eval("Status") %>'></asp:Label>
                   </ItemTemplate>
               </asp:TemplateField>
                <asp:TemplateField>
                   <ItemTemplate>
                       <asp:LinkButton ID="lbtnItems" runat="server" CommandName="Items" Text="Items"></asp:LinkButton>
                   </ItemTemplate>
               </asp:TemplateField>
               <asp:CommandField ShowEditButton="true" />
               <asp:CommandField ShowDeleteButton="true" />
           </Columns>
       </asp:GridView>