C#代码 [WebMethod] public string CheckAccount( string strUserAccount) { long lngUserCount = 0 ; SqlParameter paramUserAccount = new SqlParameter( " @UserAccount " , SqlDbType.VarChar, 50 ); paramUserAccount.Value = strUserAccount; lngUserCount = Convert.ToInt64(SqlHelper.ExecuteScalar(DBConnection.SqlServerConnection,CommandType.Text, " Select count(*) from User_Reg where UserAccount=@UserAccount,paramUserAccount)); if (lngUserCount == 0 ) return " OK " ; else return " 该用户已存在！ " ; }
3.然后新建一个“Web窗体”，比如TestForm.aspx，在该页面添加一个“文本框”服务器控件并命名为txAccount，然后在前台页面的<head></head>中加入如下语句
< script charset = " utf-8 " type = " text/javascript " src = " scripts/JQuery/jquery-1.4.2.min.js " >< / script> < script type = " text/javascript " > $(document).ready( function () { $( ' #txtAccount ' ).blur( function () { var userAcc = document.getElementById( ' txtAccount ' ).value; $.ajax({ type: " GET " , url: " WebService/TestWebService.asmx/CheckAccount?strUserAccount= " + userAcc, data: null , dataType: " text " , success: function (result) { alert( " success: " + result); }, error: function (result) { alert( " error: " + result.responseText); } }); }); }); < / script>或者
jquery代码 < script charset = " utf-8 " type = " text/javascript " src = " scripts/JQuery/jquery-1.4.2.min.js " ></ script > < script type = " text/javascript " > $(document).ready(function() { $( ' #txtAccount ' ).blur(function() { var userAcc = document.getElementById( ' txtAccount ' ).value; $.ajax({ type: " POST " , url: " WebService/TestWebService.asmx/CheckAccount " , data: " strUserAccount= " + userAcc, dataType: " text " , success: function(result) { alert( " success: " + result); }, error: function(result) { alert( " error: " + result.responseText); } }); }); }); </ script >
4.运行测测试
转载于:https://www.cnblogs.com/feima-lxl/archive/2010/06/08/1754242.html
相关资源：数据结构—成绩单生成器