asp.net客户端或服务端验证方式

客户端验证方式：

protected void Page_Load(object sender, EventArgs e)

{

if (!IsPostBack)

{

this.Button1.Attributes.Add("onclick", "return checkSame()");//为Button1添加onclick()事件 ,Button为服务器控件

}

}

<script type="text/javascript">

function trim(s) {

return s.replace( /^\s*/, "" ).replace( /\s*$/, "" );

}

function checkSame(){

var ob1=trim(document.getElementById('username').value);

var patrn=/^[A-Za-z0-9_-]+$/;

if(ob1.length==0) {

alert('wrong');

return false; }

if (!patrn.exec(ob1)) {alert("bu pi pei"); return false ; }

return true;

}

</script>

服务端验证方式：using System.Text.RegularExpressions;

protected void Button1_Click(object sender, EventArgs e)

{ string username=this.username.Text;

string pass = this.password.Text;

if (username.Trim().Length == 0 || username == "") { RegisterStartupScript("", "<script language=javascript>alert('用户名不能为空！');</script>"); }

Regex reg = new Regex(@"[a-z0-9_\u4e00-\u9fa5]{3,20}");

if (!reg.IsMatch(username))

{

Label2.Visible = true;

Label2.Text = "<font color=red>用户名不可用</font>";

return;

}

}