Jquery ajax loading error using webservice in asp.net

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I am using below code to my project its working fine. but some times i am loading same page four or five times the data will not return it will shows readystate 0 or undefined and am use this code in same domain not cross domain but i cant get exact error. please tell me if any one solved before this error

C#

Html page .

$(document).ready(function () {
       first();
      
   });


function first() {

        var firstajaxcall = null;
        firstajaxcall = $.ajax({
           type: "POST",
           contentType: "application/json; charset=utf-8",
            url: "webservice/ws_home.asmx/load_lender_list",
            data: "{}",
            dataType: "json",

            success: function (setvalue) {
             
            },
            failure: function () {
                //alert("failure");
            },
            error: function (response) {
                 alert("error" + response.d);
            }
        });
    }

C#

<big>Webservice file</big>

[WebMethod]
    public borrowercls[] load_borrower_list()
    {
        string query = string.Empty;
        con.mycon();
        List<borrowercls> lt_brlist = new List<borrowercls>();
        query = "select bloan.borrower_id, bloan.bor_purpose, bloan.bor_amount, bloan.interest, bloan.loan_duration from borrower_required_loan_details bloan, borrower_pdetails bpdetails where bpdetails.profile_agreed='1' and bloan.borrower_id = bpdetails.borrower_id";
        DataTable dt = dtdal.dt_return(query);
        if (dt.Rows.Count > 0)
        {
            foreach (DataRow dr in dt.Rows)
            {
                borrowercls hlist = new borrowercls();
                hlist.brid = dr["borrower_id"].ToString();
                hlist.br_amount = dr["bor_amount"].ToString();
                hlist.br_purpose = dr["bor_purpose"].ToString();
                hlist.br_interest = dr["interest"].ToString();
                hlist.br_duration = dr["loan_duration"].ToString();
                hlist.error = "true";
                lt_brlist.Add(hlist);
            }
        }
        else
        {
            borrowercls hlist = new borrowercls();
            hlist.error = "false";
            lt_brlist.Add(hlist);
        }
        return lt_brlist.ToArray();
    }

C#

public class borrowercls
{
    // Borrower
    public string brid { get; set; }
    public string br_amount { get; set; }
    public string br_interest { get; set; }
    public string br_month { get; set; }
    public string br_purpose { get; set; }
    public string br_duration { get; set; }

    // Error
    public string error { get; set; }
    public string err_msg { get; set; }
    // End
}

Posted 13-Dec-14 2:39am

Gowtham B

Updated 13-Dec-14 2:41am

Afzaal Ahmad Zeeshan

v2

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Comments

DamithSL 13-Dec-14 8:41am

update the question with code of dt_return method

Gowtham B 13-Dec-14 8:44am

This is my webmethod function

[WebMethod]
public borrowercls[] load_borrower_list()
{
string query = string.Empty;
con.mycon();
List<borrowercls> lt_brlist = new List<borrowercls>();
query = "select bloan.borrower_id, bloan.bor_purpose, bloan.bor_amount, bloan.interest, bloan.loan_duration from borrower_required_loan_details bloan, borrower_pdetails bpdetails where bpdetails.profile_agreed='1' and bloan.borrower_id = bpdetails.borrower_id";
DataTable dt = dtdal.dt_return(query);
if (dt.Rows.Count > 0)
{
foreach (DataRow dr in dt.Rows)
{
borrowercls hlist = new borrowercls();
hlist.brid = dr["borrower_id"].ToString();
hlist.br_amount = dr["bor_amount"].ToString();
hlist.br_purpose = dr["bor_purpose"].ToString();
hlist.br_interest = dr["interest"].ToString();
hlist.br_duration = dr["loan_duration"].ToString();
hlist.error = "true";
lt_brlist.Add(hlist);
}
}
else
{
borrowercls hlist = new borrowercls();
hlist.error = "false";
lt_brlist.Add(hlist);
}
return lt_brlist.ToArray();
}

DamithSL 13-Dec-14 8:57am

dt_return method code please?

1 solution

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DamithSL · Answer 1 · 2014-12-13T02:45:00

update the post method to get the error details, example code :

JavaScript

///       dataType: "json",
      url: "Default.aspx/DivideByZero",
      // Supply the Dividend value from our input field.
      data: "{ 'Dividend': '" + $("#Dividend").val() + "' }",
      // Error!
      error: function(xhr, status, error) {
        // Display a generic error for now.
        alert("AJAX Error!");
      }
    });
  });
});

http://encosia.com/use-jquery-to-catch-and-display-aspnet-ajax-service-errors/[^]
and also from the the web service side you can log the exceptions and check them later.