无法从网络服务获得响应

Question

This is my code in WebService.cs

private void ResponseData(string strJSON)
{
    Context.Response.Clear();
    Context.Response.ContentType = "application/json";
    Context.Response.Flush();
    Context.Response.Write(strJSON);
}

[WebMethod]
[ScriptMethod(ResponseFormat = ResponseFormat.Json)]
public void login(string login, string password)
{
    try
    {
        objda.loginid = login;
        objda.pass = password;
        ds = objda.getadminbyusernamepass();
        if (ds.Tables[0].Rows.Count > 0)
        {
            ResponseData(@"[{""result"":""success""}]");
        }
        else
        {
            ResponseData(@"[{""result"":""failure""}]");
        }
    }
    catch (Exception ex)
    {
        ResponseData(@"[{""result"":""error"""+ex.ToString()+"}]");
    }
}

where objda is an object that accesses data through the a stored procedure.

This is the aspx page:

 <form runat="server" id="form1">
     <div>
         <input type="text" id="login" runat="server" /><br />
         <input type="text" runat="server" id="password"/>
         <input type="button" value="submit" onclick="sendrequest();" />
     </div>
 </form>

<script>
    function sendrequest() {
        var a = $("#login").val();
        var b = $("#password").val();
        console.log(rowID);
        $.ajax({
            url: "WebService.asmx/login",
            data: '{"login":"' + a+ '","password":"' + b+ '"}',
            type: "POST",
            dataType: "json",
            contentType: "application/json; charset-utf-8",
            success: function (data) {
                alert("success");
            },
            error: function (xhr, ajaxOptions, thrownError) {
                alert('error: ' + xhr.status + ' ' + thrownError);
            }
        });

    }
</script>

I get error 500 undefined on button press. Also instead of showing alert='success' , I would like to access the value of result and show it. Any suggestions will be helpful.

Answer 1

The way login(login,password) method is written, it says, the arguments can be supplied by using query string. But in your ajax call, you have constructed the data to be json which is not correct. Try changing your method signature to

    public class CustomerModel
    {
        public string login { get; set; }
        public string password { get; set; }
    }

    public void login(CustomerModel customerlogin)
    {
        // Code
    }