验证Gridview

Question

我有一个gridview，我想验证它是否处于编辑模式。我该怎么做呢？

下面是我的Gridview和下面这是我的第一次尝试。

<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False" 
     DataSourceID="SqlDataSource1" BackColor="White" BorderColor="#999999" 
     BorderStyle="None" BorderWidth="1px" CellPadding="3" GridLines="Vertical" 
     Width="387px" DataKeyNames = "APPID" AllowPaging="True"> 
     <PagerSettings Mode="NextPreviousFirstLast" /> 
     <RowStyle BackColor="#EEEEEE" ForeColor="Black" /> 
     <Columns> 
      <asp:BoundField DataField="APPName" HeaderText="Application" 
       SortExpression="APPName" /> 
      <asp:BoundField DataField="Description" HeaderText="Description" 
       SortExpression="Description" /> 
      <asp:CommandField AccessibleHeaderText="Edit" ButtonType="Image" 
       DeleteImageUrl="~/images/bttnDelete.gif" 
       EditImageUrl="~/images/bttnEdit.gif" HeaderText="Action" 
       ShowDeleteButton="True" ShowEditButton="True" 
       ShowHeader="True" CancelImageUrl="~/images/bttnCancel.gif" 
       UpdateImageUrl="~/images/bttnSave.gif" InsertVisible="False" /> 
     </Columns> 
     <FooterStyle BackColor="#CCCCCC" ForeColor="Black" /> 
     <PagerStyle BackColor="#999999" ForeColor="Black" HorizontalAlign="Center" /> 
     <SelectedRowStyle BackColor="#008A8C" Font-Bold="True" ForeColor="White" /> 
     <HeaderStyle BackColor="#000084" Font-Bold="True" ForeColor="White" /> 
     <AlternatingRowStyle BackColor="#DCDCDC" /> 
    </asp:GridView> 

第一次尝试

Protected Sub GridView1_RowDataBound(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.GridViewRowEventArgs) Handles GridView1.RowDataBound 

If e.Row.RowState = DataControlRowState.Edit Then 

      Dim savebtn As ImageButton = DirectCast(e.Row.Cells(2).Controls(0), ImageButton) 
      savebtn.ValidationGroup = "grd" 

      'set up Name Textbox 
      Dim txtname As TextBox = DirectCast(e.Row.Cells(0).Controls(0), TextBox) 
      txtname.ValidationGroup = "grd" 


      Dim reqval As New RequiredFieldValidator 
      reqval.ID = "reqnam" 
      reqval.ValidationGroup = "grd" 

      reqval.ErrorMessage = "Application Name Cannot Be Empty" 
      reqval.ControlToValidate = txtname.UniqueID 

     End If 

Answer 1

你最好的办法是到BoundField转换成TemplateField并添加验证控件的EditItemTemplate。所以你的第一列将变为：

<asp:TemplateField HeaderText="Application" SortExpression="APPName"> 
    <EditItemTemplate> 
     <asp:TextBox ID="txtApp" runat="server" Text='<%# Bind("APPName") %>'/> 
     <asp:RequiredFieldValidator runat='server' ID='requiredApp' 
      ErrorMessage='Application Name Cannot Be Empty' ControlToValidate='txtApp' /> 
    </EditItemTemplate> 
    <ItemTemplate> 
     <asp:Label ID="labelApp" runat="server" Text='<%# Bind("APPName") %>'/> 
    </ItemTemplate> 
</asp:TemplateField>