Jquery自动完成未经授权的Webmethod

我正在尝试使用jQuery自动完成文本框从WebForm（.NET 4.6）中的数据库中查找数据。当启动AJAX方法时，我在控制台中收到一个401未经授权的错误

请告诉我如何使用jQuery自动完成功能在服务器端成功点击Webmethod

我的js文件如下：

$(function() {

    ...

    $("input[id*='txtDiagnosisSearch']").autocomplete({
        source: function(request, response) {
            $.ajax({
                type: "POST",
                contentType: "application/json; charset=utf-8",
                url: "/WebUserProvider/Referral_Precert_CNReferralForm.aspx/GetDiagnosisCodes",
                data: "{'diagCode':'" + $("input[id*='txtDiagnosisSearch']").val() +
                    "', 'description':'" + $("input[id*='txtDiagnosisSearch']").val() + "'}",
                dataType: "json",
                success: function(data) {
                    response(data.d);
                },
                error: function(result) {
                    alert("No Match");
                }
            });
        }
    });

    });

<asp:Content ID="Content1" ContentPlaceHolderID="ContentPlaceHolder1" runat="Server">

    <script src="../JavaScript/WebProvider/Referral_Precert_CNReferralForm.js"></script>

...

<div style="display: inline-block; font-weight: bold; width: 20%">
                    <asp:TextBox runat="server" ID="txtDiagnosisSearch"></asp:TextBox>
                </div>

...

</asp:Content>

[WebMethod]    
    public List<Referral_PrecertVO.DiagnosisCodes> GetDiagnosisCodes(string diagCode, string description)
    {
    var list = new List<Referral_PrecertVO.DiagnosisCodes>();

    list = objReferral_PrecertBL.GetDiagnosisCodes(diagCode, description);

    return list;
}

我的HTML如下所示：

$(function() {

    ...

    $("input[id*='txtDiagnosisSearch']").autocomplete({
        source: function(request, response) {
            $.ajax({
                type: "POST",
                contentType: "application/json; charset=utf-8",
                url: "/WebUserProvider/Referral_Precert_CNReferralForm.aspx/GetDiagnosisCodes",
                data: "{'diagCode':'" + $("input[id*='txtDiagnosisSearch']").val() +
                    "', 'description':'" + $("input[id*='txtDiagnosisSearch']").val() + "'}",
                dataType: "json",
                success: function(data) {
                    response(data.d);
                },
                error: function(result) {
                    alert("No Match");
                }
            });
        }
    });

    });

<asp:Content ID="Content1" ContentPlaceHolderID="ContentPlaceHolder1" runat="Server">

    <script src="../JavaScript/WebProvider/Referral_Precert_CNReferralForm.js"></script>

...

<div style="display: inline-block; font-weight: bold; width: 20%">
                    <asp:TextBox runat="server" ID="txtDiagnosisSearch"></asp:TextBox>
                </div>

...

</asp:Content>

[WebMethod]    
    public List<Referral_PrecertVO.DiagnosisCodes> GetDiagnosisCodes(string diagCode, string description)
    {
    var list = new List<Referral_PrecertVO.DiagnosisCodes>();

    list = objReferral_PrecertBL.GetDiagnosisCodes(diagCode, description);

    return list;
}

...
...

我的服务器端代码如下：

$(function() {

    ...

    $("input[id*='txtDiagnosisSearch']").autocomplete({
        source: function(request, response) {
            $.ajax({
                type: "POST",
                contentType: "application/json; charset=utf-8",
                url: "/WebUserProvider/Referral_Precert_CNReferralForm.aspx/GetDiagnosisCodes",
                data: "{'diagCode':'" + $("input[id*='txtDiagnosisSearch']").val() +
                    "', 'description':'" + $("input[id*='txtDiagnosisSearch']").val() + "'}",
                dataType: "json",
                success: function(data) {
                    response(data.d);
                },
                error: function(result) {
                    alert("No Match");
                }
            });
        }
    });

    });

<asp:Content ID="Content1" ContentPlaceHolderID="ContentPlaceHolder1" runat="Server">

    <script src="../JavaScript/WebProvider/Referral_Precert_CNReferralForm.js"></script>

...

<div style="display: inline-block; font-weight: bold; width: 20%">
                    <asp:TextBox runat="server" ID="txtDiagnosisSearch"></asp:TextBox>
                </div>

...

</asp:Content>

[WebMethod]    
    public List<Referral_PrecertVO.DiagnosisCodes> GetDiagnosisCodes(string diagCode, string description)
    {
    var list = new List<Referral_PrecertVO.DiagnosisCodes>();

    list = objReferral_PrecertBL.GetDiagnosisCodes(diagCode, description);

    return list;
}

[WebMethod]
公共列表GetDiagnosisCodes（字符串诊断代码、字符串描述）
{
var list=新列表（）；
list=objReferral\u PrecertBL.GetDiagnosisCodes（诊断代码，描述）；
退货清单；
}