從Ajax命令獲取WebMethod

Question

如何從Ajax命令獲取WebMethod？

當我點擊Button1的我得到警報的錯誤代碼說：

"Error Code: [object Object]" 

的Default.aspx：

<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script> 
<script type="text/javascript"> 
    function GetDateTime() { 
     var jsonid = $("#<%= TextBox2.ClientID %>").val(); 
     var json1 = "{'id':'" + jsonid + "'}"; 
     $.ajax 
     ({ 
      type: "POST", 
      url: "Default.aspx/GetServerDateTime", 
      data: json1, 
      contentType: "application/json;charset=utf-8", 
      dataType: "json", 
      success: function (result) { 
       alert(result.d); 
      }, 
      error: function (err) { 
       alert("Error Code: " + err); 
      } 
     }); 
    } 
</script> 

Default.aspx.cs：

protected void Button1_Click(object sender, EventArgs e) 
    { 
     ScriptManager.RegisterClientScriptBlock(this, this.GetType(), "scr", "Javascript:GetDateTime();", true); 
    } 
    [System.Web.Services.WebMethod] 
    public static string GetServerDateTime(string id) 
    { 
     string datetimeid1 = "ID: " + id + " Date&Time" + DateTime.Now.ToString("MM/dd/yyyy hh:mm:ss tt"); 
     return datetimeid1; 
    } 

Answer 1

我由於不正確的JSON，相信你得到500 Internal Server Error。你可以正確編碼JSON與JSON.stringify，所以更改此：

var json1 = "{'id':'" + jsonid + "'}"; 

這樣：

var json1 = JSON.stringify({ id: jsonid });