jQuery使用$.ajax进行即时验证实例详解

<br />
数学:<asp:TextBox
ID="txtMath" runat="server"></asp:TextBox>
<asp:RequiredFieldValidator ID="RequiredFieldValidator3" runat="server"
ControlToValidate="txtMath" ErrorMessage="不能为空"></asp:RequiredFieldValidator>
<asp:RangeValidator ID="RangeValidator1" runat="server"
ControlToValidate="txtMath" ErrorMessage="分数在0-100之间" MaximumValue="100"
MinimumValue="0" Type="Integer"></asp:RangeValidator>
<br />
英语:<asp:TextBox ID="txtEnglish" runat="server"></asp:TextBox>
<asp:RequiredFieldValidator ID="RequiredFieldValidator4" runat="server"
ControlToValidate="txtEnglish" ErrorMessage="不能为空"></asp:RequiredFieldValidator>
<asp:RangeValidator ID="RangeValidator2" runat="server"
ControlToValidate="txtEnglish" ErrorMessage="分数在0-100之间" MaximumValue="100"
MinimumValue="0" Type="Integer"></asp:RangeValidator>
<br />
语文:<asp:TextBox ID="txtChinese" runat="server"></asp:TextBox>
<asp:RequiredFieldValidator ID="RequiredFieldValidator5" runat="server"
ControlToValidate="txtChinese" ErrorMessage="不能为空"></asp:RequiredFieldValidator>
<asp:RangeValidator ID="RangeValidator3" runat="server"
ControlToValidate="txtChinese" ErrorMessage="分数在0-100之间" MaximumValue="100"
MinimumValue="0" Type="Integer"></asp:RangeValidator>
<br />
<asp:Button ID="btnSave" runat="server" Text="保存" onclick="btnSave_Click" />
<asp:Button ID="btnBack" runat="server" Text="返回" CausesValidation="False"
onclick="btnBack_Click" />
<asp:Label ID="lblMsg" runat="server"></asp:Label>
</div>
</form>
</body>
</html>

一般处理程序Check.ashx代码：

<%@ WebHandler Language="C#" class="Check" %>
using System;
using System.Web;
public class Check : IHttpHandler {
 public void ProcessRequest (HttpContext context) {
  context.Response.ContentType = "text/plain";
  string num = context.Request["txtNum"].ToString();
  bool result = false;
  if(num=="12")//为了简化代码，没有访问数据库。实际项目应查询数据库。
  {
   result = true;
  }
  context.Response.Write(result);
 }
 public bool IsReusable {
  get {
   return false;
  }
 }
}

希望本文所述对大家jQuery程序设计有所帮助。