如何调用webmethod并显示警报消息 [英] How to call webmethod and show alert message

问题描述

我正在尝试使用WebMethod发出警告信息，我的条件如下：
 
 1.我正试图限制用户在星期一申请休假时，他/她已经在上个星期五休假。 
 2.我正在从我的数据库中详细说明员工离开详细信息并尝试在WebMethod中编写代码。

我尝试过：

< pre>我的cs页码：
 
 [System.Web.Services.WebMethod] 
  public   string  GetCurrentTime（）
 {
 SqlConnection con =  new  SqlConnection（conString）; 
 con.Open（）; 
 SqlCommand cn =  new  SqlCommand（）; 
 DateTime date3 = System.DateTime.Now; 
 DateTime date4 = System.DateTime.Now; 
 DateTime date1 = System.DateTime.Now.AddDays（-6）; ; 
 DateTime date2 = System.DateTime.Now.AddDays（-6）; 
 DateTime.TryParse（txtFromDate.Text， out  date1）; 
 DateTime.TryParse（txtToDate.Text， out  date2）; 
 
  //   string val;  
  //   var EmpID =SS212;  
 SqlDataAdapter da =  new  SqlDataAdapter（scmd）; 
 DataTable dt =  new  DataTable（）; 
 da.Fill（dt）; 
 sdr = scmd.ExecuteReader（）; 
  if （date1.DayOfWeek == DayOfWeek.Monday&& date2.DayOfWeek == DayOfWeek.Monday）
 {
  string  Leave =  选择EmpID，LeaveType，LeaveFromDate，LeaveToDate ，LeaveAppatus来自LeaveApplication其中LeaveFromDate =' + date1 +  '和LeaveToDate =' + date2 +  '; 
 scmd =  new  SqlCommand（Leave，scon）; 
 
 
 
} 
  for （ int  i =  0 ; i <  dt.Rows.Count; i ++）
 { 
 
 字符串  value ; 
  if （（dt.Rows [i] [  LeaveStatus]。ToString（）==  已接受）|| （dt.Rows [i] [  LeaveStatus]。ToString（）==  待定））
 
 {
  value  =  ; 
 
} 
  else  
 {
 
  value  =  ; 
} 
 
} 
 
 
  return   ; 
} 
 
 
 
 
我的aspx：
 
 
 
 < script     src   =  http://ajax.googleapis.com/ajax/libs/jquery/1.8.3/jquery.min.js   类型  =  text / javascript >  < /   script  >  
 < script     type   =  text / javascript >  
 function ShowCurrentDate（）{
 
 $ .ajax（{
 type：  POST，
 url：< span class =code-string>  LMSEmployee.aspx / GetCurrentTime，
 data： params ，
 contentType：  application / json; charset = utf-8，
 dataType：  json，
成功：OnSuccess，
失败：函数（响应）{
 alert（ 请）; 
} 
}）; 
} 
函数OnSuccess（响应）{
 alert（  请）; 
 
} 
 < /   script  >  

解决方案

.ajax（{
type： POST，
url： LMSEmployee.aspx / GetCurrentTime，
data： params ，
contentType： application / JSON; charset = utf-8，
dataType： json，
成功：OnSuccess，
失败：函数（响应）{
alert（ 请）;
}
}）;
}
函数OnSuccess（响应）{
alert（ 请）;

}
< / script >

< blockquote>参考这个

使用ASP.Net WebMethod调用jQuery AJAX [ ^ ]

尝试使用 static 方法

Hi,
    I am trying to give an alert message using "WebMethod",where my conditions are as follows

1.I am trying to restrict the user applying leave on "Monday" when he/She has already taken Leave on the previous friday.
2.I am geeting the details from my Database where the employees leave Details and trying to code this in WebMethod.

What I have tried:

<pre>My cs page code:

       [System.Web.Services.WebMethod]
    public  string GetCurrentTime()
    {
        SqlConnection con = new SqlConnection(conString);
        con.Open();
        SqlCommand cn = new SqlCommand();
        DateTime date3 = System.DateTime.Now;
        DateTime date4 = System.DateTime.Now;
        DateTime date1 = System.DateTime.Now.AddDays(-6); ;
        DateTime date2 = System.DateTime.Now.AddDays(-6);
        DateTime.TryParse(txtFromDate.Text, out date1);
        DateTime.TryParse(txtToDate.Text, out date2);
        
       // string val;
       // var EmpID = "SS212";
        SqlDataAdapter da = new SqlDataAdapter(scmd);
            DataTable dt=new DataTable();
            da.Fill(dt);
            sdr = scmd.ExecuteReader();
        if (date1.DayOfWeek == DayOfWeek.Monday && date2.DayOfWeek == DayOfWeek.Monday)
        {
            string Leave = "Select EmpID ,LeaveType,LeaveFromDate,LeaveToDate,LeaveStatus from LeaveApplication Where LeaveFromDate  = '" + date1 + "' and LeaveToDate  = '" + date2 + "'";
            scmd = new SqlCommand(Leave, scon);
            
            
            
        }
        for(int i = 0; i < dt.Rows.Count; i++)
        {

            String value ;
            if ((dt.Rows[i]["LeaveStatus"].ToString() == "Accepted") || (dt.Rows[i]["LeaveStatus"].ToString() == "Pending")) 

        {
          value="";
        
        }
            else 
        {

            value = "";
        }

        }
       

        return "";       
    }




My aspx:



            <script src="http://ajax.googleapis.com/ajax/libs/jquery/1.8.3/jquery.min.js" type="text/javascript"></script>
    <script type="text/javascript">
        function ShowCurrentDate() {
            
            $.ajax({
                type: "POST",
                url: "LMSEmployee.aspx/GetCurrentTime",
                data: params,
                contentType: "application/json; charset=utf-8",
                dataType: "json",
                success: OnSuccess,
                failure: function (response) {
                    alert("Please");
                }
            });
        }
        function OnSuccess(response) {
            alert("Please");

        }
        </script>

解决方案

.ajax({ type: "POST", url: "LMSEmployee.aspx/GetCurrentTime", data: params, contentType: "application/json; charset=utf-8", dataType: "json", success: OnSuccess, failure: function (response) { alert("Please"); } }); } function OnSuccess(response) { alert("Please"); } </script>

refer this
Calling ASP.Net WebMethod using jQuery AJAX[^]
try with static method

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