原始方法(失去光标验证数据库)

页面代码：

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title></title>
    <script type="text/javascript">
        function $(e) {
            return document.getElementById ? document.getElementById(e) : null;
        }
        function Check(name) {
            var xmlHttp = false;
            var url = "Handler1.ashx?name=" + name + "&rd=" + Math.random();
            CreateXmlHttp();
            ajax_process(url);
        }
        function ajax_process(url) {
            xmlHttp.open("post", url, true);
            xmlHttp.onreadystatechange = ajax_sumbitemployment;
            xmlHttp.send(null);
            function ajax_sumbitemployment() {
                if (xmlHttp.readyState == 4) {
                    if (xmlHttp.status == 200) {
                        if (xmlHttp.responseText == "validateNull") {
                            $('Label1').innerText = " 用户名不能为空！";
                            return;
                        }

                        if (xmlHttp.responseText == "smallLength") {
                           // $('Label1').innerText = " 不能小于2个字符！";
                            alert("5432323");
                            return;
                        }
                        if (xmlHttp.responseText == "exist") {
                            $('Label1').innerText = " 用户名已存在，请另选用户名！";
                            return;
                        }
                        else {
                            $('Label1').innerText = "恭喜您用户名可以使用!";
                        }
                    }
                }
            }
        }
        //创建Ajax对象
        function CreateXmlHttp() {
            try { xmlHttp = new ActiveXObject("Msxml2.XMLHTTP"); }
            catch (e) {
                try { xmlHttp = new ActiveXObject("Microsoft.XMLHTTP"); }
                catch (e) {
                    try { xmlHttp = new XMLHttpRequest(); }
                    catch (e) { xmlHttp = false; } 
                } 
            }
        }  
</script>
</head>
<body>
    <form id="form1" runat="server">
    <div>
        <asp:Label ID="Label1" runat="server" Text="Label"></asp:Label>
<asp:TextBox ID="txtUsernaem" runat="server" onblur="return Check(this.value)"></asp:TextBox>

<asp:TextBox ID="TextBox1" runat="server"  ></asp:TextBox>
    </div>
    </form>
</body>
</html>

处理文件：Handler1.ashx

  public class Handler1 : IHttpHandler
    {

        public void ProcessRequest(HttpContext context)
        {
            context.Response.ContentType = "text/plain";
            //context.Response.Write("Hello World");
            string Name = context.Request.QueryString["Name"];
            if (!String.IsNullOrEmpty(Name))
            {
                if (Name.Length < 2)
                {
                    context.Response.Write("smallLength");
                }
                else
                {
                    context.Response.Write("exist");
                }

               // Maticsoft.BLL.Personnel person = new Maticsoft.BLL.Personnel();
               // Maticsoft.Model.personnelDate personDate = person.GetModel(Name);

                //if (personDate != null)
                //{
                //    context.Response.Write("exist");
                //}
            }
            else
            {

                context.Response.Write("validateNull");
            }

        }

        public bool IsReusable
        {
            get
            {
                return false;
            }
        }
    }

posted on 2011-08-04 14:28 .net 流氓阅读(339) 评论(0) 编辑收藏举报