自从过去两天以来，我正在尝试从我的Web服务实现jQuery Select2远程数据访问的功能。我正在使用ASP.NET Web表单应用程序和Webservice，以下是我的WebForm和WebService，我没有从我的Web服务获取任何数据，请帮助
Default.aspx的
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title></title>
<script src="js/jquery-2.1.4.js"></script>
<script src="js/select2.js"></script>
<link href="css/select2.css" rel="stylesheet" />
<script type="text/javascript">
$(document).ready(function () {
$('#ddStudents').select2({
placeholder: "Search Student",
minimumInputLength: 3,
multiple: false,
ajax: {
url: "StudentWebService.asmx/GetStudentSearch",
dataType: 'json',
type: "POST",
contentType: "application/json; charset-utf-8",
quietMillis: 100,
data: function (term, page) {
return {
q: term,
page_limit: 10
};
},
results: function (data, page) {
return { results: data };
}
}
});
});
</script>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:DropDownList ID="ddStudents" runat="server">
<asp:ListItem Value="0">Select Student</asp:ListItem>
</asp:DropDownList>
</div>
</form>
</body>
</html>
StudentWebService.asmx
using System;
using System.Collections.Generic;
using System.Data;
using System.Data.SqlClient;
using System.Linq;
using System.Web;
using System.Web.Script.Serialization;
using System.Web.Services;
public class Student
{
public string StudentID { get; set; }
public string FirstName { get; set; }
public string LastName { get; set; }
}
/// <summary>
/// Summary description for StudentWebService
/// </summary>
[WebService(Namespace = "http://tempuri.org/")]
[WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]
// To allow this Web Service to be called from script, using ASP.NET AJAX, uncomment the following line.
[System.Web.Script.Services.ScriptService]
public class StudentWebService : System.Web.Services.WebService
{
private string connectionString = System.Configuration.ConfigurationManager.ConnectionStrings["JobPortalConnectionString"].ConnectionString;
[WebMethod]
public void GetStudentSearch(string term)
{
SqlConnection connection = new SqlConnection(connectionString);
try
{
SqlCommand command = new SqlCommand();
command.Connection = connection;
command.CommandText = "SelectStudentsSerach";
command.CommandType = CommandType.StoredProcedure;
command.Parameters.Add(new SqlParameter("@FirstName", term));
if (connection.State == ConnectionState.Closed)
connection.Open();
DataSet dSet = new DataSet();
SqlDataAdapter sqlAdapter;
sqlAdapter = new SqlDataAdapter();
if (connection.State == ConnectionState.Closed)
connection.Open();
sqlAdapter.SelectCommand = command;
sqlAdapter.Fill(dSet);
if (connection.State == ConnectionState.Open)
connection.Close();
List<Student> listStudent = new List<Student>();
if (dSet.Tables[0].Rows.Count > 0)
{
foreach (DataRow item in dSet.Tables[0].Rows)
{
Student s = new Student();
s.StudentID = item["StudentID"].ToString();
s.FirstName = item["FirstName"].ToString();
s.LastName = item["LastName"].ToString();
listStudent.Add(s);
}
}
JavaScriptSerializer js = new JavaScriptSerializer();
Context.Response.Write(js.Serialize(listStudent));
}
catch (Exception)
{
}
finally
{
connection.Close();
}
}
}
另外我设置我的Web.Config文件添加了以下标记
<webServices>
<protocols>
<add name="HttpGet"/>
<add name="HttpPost"/>
</protocols>
</webServices>