通过AJAX调用webservice填充下拉列表时出现500内部服务器错误。 [英] 500 internal server error on populating dropdownlist through AJAX call to webservice.

问题描述

我的网络服务没有被调用。我收到500内部服务器错误。我该怎么办？



这是HTML编码：

My webservice is not getting called. I am getting 500 internal server error. what should i do?

This is the HTML coding:

$(window).load(function () {
<pre>              $.ajax({
                        type: "GET",
                        data: {},
                        url:  "services/VisiTracWS.asmx/GetLocation",
                        success: function (response) {
                            alert("1");
                            var strSection = '<option value="0">Select Location</option>';
                            if (response.d.length > 0) {
                                for (i = 0; i < response.d.length; i++) {

                                    strSection = strSection + '<option value="' + response.d[i].LocationID + '">' + response.d[i].LocationName + '</option>';
                                }
                            }
                            $('#ddlLocations').html(strSection);
                        },
                        error: function (response) {
                            alert(response.status + " " + response.statusText);
                        }
                    });
                });

这是网络服务：

This is the webservice:

<pre>[WebMethod]
        public static List<Location> GetLocation()
        {
            List<Location> lst = new List<Location>();
            try
            {
                visitrac.Location lc = new visitrac.Location();
                DataTable DT = lc.GetDropdown();

                lst = (from DataRow dr in DT.Rows
                       select new Location()
                       {
                           LocationID = Convert.ToInt32(dr["LocationID"]),
                           LocationName = Convert.ToString(dr["LocationName"]),
                       }).ToList();
            }
            catch (Exception ex)
            {
                // clsException.WriteLog("", "GetLocation", ex.Message);
            }
            return lst;
        }

我的尝试：



我试过将方法设为静态。将POST更改为GET

What I have tried:

I have tried making the method static. changing POST to GET

推荐答案

（窗口）.load（function（）{
< pre >

(window).load(function () { <pre>

.ajax（{
类型：GET，
数据：{}，
url：services / VisiTracWS.asmx / GetLocation，
成功：函数（响应）{
alert（ 1）;
var strSection ='< 选项 value = 0 > 选择位置< / option > ';
if（response.d.length> 0）{
for（i = 0; i < response.d.length; i ++） {

< span class =code-attribute> < span class =code-attribute> strSection = strSection + '< option value = '+ response.d [i] .LocationID +' > '+ response.d [i] .LocationName +'< / option > ';
}
}

.ajax({ type: "GET", data: {}, url: "services/VisiTracWS.asmx/GetLocation", success: function (response) { alert("1"); var strSection = '<option value="0">Select Location</option>'; if (response.d.length > 0) { for (i = 0; i < response.d.length; i++) { strSection = strSection + '<option value="' + response.d[i].LocationID + '">' + response.d[i].LocationName + '</option>'; } }

（'＃ddlLocations'）。html（strSection）;
}，
错误：函数（响应）{
alert（response.status ++ response.statusText）;
}
}）;
}）;

('#ddlLocations').html(strSection); }, error: function (response) { alert(response.status + " " + response.statusText); } }); });

这是网络服务：

This is the webservice:

<pre>[WebMethod]
        public static List<Location> GetLocation()
        {
            List<Location> lst = new List<Location>();
            try
            {
                visitrac.Location lc = new visitrac.Location();
                DataTable DT = lc.GetDropdown();

                lst = (from DataRow dr in DT.Rows
                       select new Location()
                       {
                           LocationID = Convert.ToInt32(dr["LocationID"]),
                           LocationName = Convert.ToString(dr["LocationName"]),
                       }).ToList();
            }
            catch (Exception ex)
            {
                // clsException.WriteLog("", "GetLocation", ex.Message);
            }
            return lst;
        }

我的尝试：



我试过将方法设为静态。将POST更改为GET

What I have tried:

I have tried making the method static. changing POST to GET

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