CustomValidator控件用法

void  ServerValidation ( object  source, ServerValidateEventArgs args)

function  ValidationFunctionName(source, arguments)

<% @ Page Language = " C# "  ContentType = " text/html "  ResponseEncoding = " gb2312 "   %>
<! DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd" >
< html  xmlns ="http://www.w3.org/1999/xhtml" >
< head >
< meta  http-equiv ="Content-Type"  content ="text/html; charset=gb2312"   />
< meta  name ="keywords"  content ="CustomValidator控件用法"   />
< meta  name ="description"  content ="周公讲述CustomValidator控件用法"   />
< title > CustomValidator控件用法 </ title >
</ head >
< script  language ="javascript"  type ="text/javascript" >
     function  ClientValidateUserName(source,args)
    {
         // alert(source);source=CustomValidator1,为验证控件
         // alert(args);
         var  obj = document.getElementById( " txtUserName " );
         if ((obj.value == "" ) || (obj.value.length > 10 ))
        {
            args.IsValid = false ;
        }
         else
        {
            args.IsValid = true ;
        }
    }
    
     function  CheckCheckBoxList(source,args)
    {
         var  obj = document.getElementById( ' <%=this.cbAgeRangeList.ID%> ' ); // 返回具有和属性id的值相同或相似的对象集合
         var  k,right = false ;
         var  length = (obj.all.tags( ' input ' ).length); // 返回obj对象里具有“input”标签对象的集合
         for (k = 0 ;k < length;k ++ )
        {
             // alert(" name:"+obj.all.tags('input')[k].name+"是否："+obj.all.tags('input')[k].checked);
             if (obj.all.tags( ' input ' )[k].checked)  //  obj对象里具有input标签对象键值为k的属性为checked的值
            {
                right =! right;
            }
                        
        }
         if (right)
        {
            args.IsValid = true ;
        }
         else
        {
            args.IsValid = false ;
        }
    }
</ script >
< script  runat ="server" >
protected  void  Page_Load(Object Src, EventArgs E)
{
   if  ( ! IsPostBack) DataBind();
}

public  void  ServerValidateUserName(object source, ServerValidateEventArgs args)
{
     if ((string.IsNullOrEmpty(txtUserName.Text)) || (txtUserName.Text.Length > 10 ))
    {
        args.IsValid = false ;
    }
     else
    {
        args.IsValid = true ;
    }
}
</ script >
< body >
< form  runat ="server" >
  UserName: < asp:TextBox  ID ="txtUserName"  runat ="server"   />
   < asp:CustomValidator  ID ="CustomValidator1"  runat ="server"  ErrorMessage ="错误信息"  ControlToValidate ="txtUserName"  ClientValidationFunction ="ClientValidateUserName"  ValidateEmptyText ="True" ></ asp:CustomValidator >
   < asp:Button  ID ="btnValid1"  runat ="server"  Text ="验证用户名"   />
   < asp:CheckBoxList  ID ="cbAgeRangeList"  runat ="server"  Height ="36px"  Width ="400px"  RepeatDirection ="Vertical" >
     < asp:ListItem  Value ="1" > &lt; 16 </ asp:ListItem >
     < asp:ListItem  Value ="2" > 16-22 </ asp:ListItem >
     < asp:ListItem  Value ="3" > 22-30 </ asp:ListItem >
     < asp:ListItem  Value ="4" > 30-40 </ asp:ListItem >
     < asp:ListItem  Value ="5" > 40-50 </ asp:ListItem >
     < asp:ListItem  Value ="6" > 50-60 </ asp:ListItem >
     < asp:ListItem  Value ="6" > 60-80 </ asp:ListItem >
     < asp:ListItem  Value ="6" > &gt; 80 </ asp:ListItem >
   </ asp:CheckBoxList >
   < asp:customvalidator  id ="CustomValidator2"  runat ="server"  
ErrorMessage ="请正确选择年龄段"  ClientValidationFunction ="CheckCheckBoxList" ></ asp:customvalidator >
</ form >
</ body >
</ html >