validationsummary

代码:

<!DOCTYPE html>

<html>

<body>

 

<form runat="server">

<table>

<tr>

<td>

<table bgcolor="#b0c4de" cellspacing="10">

   <tr>

     <td align="right">Name:</td>

     <td><asp:TextBox id="txt_name" runat="server"/></td>

     <td>

     <asp:RequiredFieldValidator

     ControlToValidate="txt_name"

     ErrorMessage="Name"

     Text="*"

     runat="server"/>

     </td>

   </tr>

   <tr>

     <td align="right">Card Type:</td>

     <td>

     <asp:RadioButtonList id="rlist_type"

     RepeatLayout="Flow"

     runat="server">

     <asp:ListItem>Diners</asp:ListItem>

     <asp:ListItem>MasterCard</asp:ListItem>

     <asp:ListItem>Visa</asp:ListItem>

     </asp:RadioButtonList>

     </td>

     <td>

     <asp:RequiredFieldValidator

     ControlToValidate="rlist_type"

     ErrorMessage="Card Type"

     InitialValue=""

     Text="*"

     runat="server"/>

     </td>

   </tr>

   <tr>

     <td></td>

     <td><asp:Button id="b1" Text="Submit" runat="server"/></td>

     <td></td>

   </tr>

</table>

</td>

</tr>

</table>

<br>

<asp:ValidationSummary

HeaderText="You must enter a value in the following fields:"

DisplayMode="BulletList"

EnableClientScript="true"

runat="server"/>

</form>

 

</body>

</html>

结果:

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