How to debug android application which is using API from IIS

@Mark, No, he meant to say integrate swagger to your API so that you can test it.

But, in your case as you want to debug a deployed API, you don't need swagger, swagger is just a client as Postman.

You need some kind of logger which logs the error. you can integrate NLog, or you can simply log errors to any text file using below code

using System;
using System.IO;
using context = System.Web.HttpContext;
public static class ExceptionLogging
{
private static String ErrorlineNo, Errormsg, extype, exurl, hostIp,ErrorLocation, HostAdd;
public static void SendErrorToText(Exception ex)
{
var line = Environment.NewLine + Environment.NewLine;
ErrorlineNo = ex.StackTrace.Substring(ex.StackTrace.Length - 7, 7);
Errormsg = ex.GetType().Name.ToString();
extype = ex.GetType().ToString();
exurl = context.Current.Request.Url.ToString();
ErrorLocation = ex.Message.ToString();
try
{
string filepath = context.Current.Server.MapPath("~/ExceptionDetailsFile/"); //Text File Path
if (!Directory.Exists(filepath))
{
Directory.CreateDirectory(filepath);
}
filepath = filepath + DateTime.Today.ToString("dd-MM-yy") + ".txt"; //Text File Name
if (!File.Exists(filepath))
{
File.Create(filepath).Dispose();
}
using (StreamWriter sw = File.AppendText(filepath))
{
string error = "Log Written Date:" + " " + DateTime.Now.ToString() + line + "Error Line No :" + " " + ErrorlineNo + line + "Error Message:" + " " + Errormsg + line + "Exception Type:" + " " + extype + line + "Error Location :" + " " + ErrorLocation + line + " Error Page Url:" + " " + exurl + line + "User Host IP:" + " " + hostIp + line;
sw.WriteLine("-----------Exception Details on " + " " + DateTime.Now.ToString() + "-----------------");
sw.WriteLine("-------------------------------------------------------------------------------------");
sw.WriteLine(line);
sw.WriteLine(error);
sw.WriteLine("--------------------------------*End*------------------------------------------");
sw.WriteLine(line);
sw.Flush();
sw.Close();
}
}
catch (Exception e)
{
e.ToString();
}
}
}

try
{
//your code
}
catch (Exception ex)
{
ExceptionLogging.SendErrorToText(ex);
}

Other option is to directly trace the errors on IIS

https://stackify.com/beyond-iis-logs-find-failed-iis-asp-net-requests/

4 Replies

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Mark Tabor4y ago
Swagger and postman require to send the request from them by passing paramters in header or body but in my case I want to see these paramters coming from android application not from swagger or postman or fiddler
Sachin Singh4y ago
@Mark, No, he meant to say integrate swagger to your API so that you can test it.
But, in your case as you want to debug a deployed API, you don't need swagger, swagger is just a client as Postman.

You need some kind of logger which logs the error. you can integrate NLog, or you can simply log errors to any text file using below code
using System;
using System.IO;
using context = System.Web.HttpContext;


public static class ExceptionLogging
{

private  static String ErrorlineNo, Errormsg, extype, exurl, hostIp,ErrorLocation, HostAdd;

    public static void SendErrorToText(Exception ex)
    {
        var line = Environment.NewLine + Environment.NewLine;

        ErrorlineNo = ex.StackTrace.Substring(ex.StackTrace.Length - 7, 7);
        Errormsg = ex.GetType().Name.ToString();
        extype = ex.GetType().ToString();
        exurl = context.Current.Request.Url.ToString();
        ErrorLocation = ex.Message.ToString();

        try
        {
            string filepath = context.Current.Server.MapPath("~/ExceptionDetailsFile/");  //Text File Path

            if (!Directory.Exists(filepath))
            {
                Directory.CreateDirectory(filepath);

            }
            filepath = filepath + DateTime.Today.ToString("dd-MM-yy") + ".txt";   //Text File Name
            if (!File.Exists(filepath))
            {


                File.Create(filepath).Dispose();

            }
            using (StreamWriter sw = File.AppendText(filepath))
            {
                string error = "Log Written Date:" + " " + DateTime.Now.ToString() + line + "Error Line No :" + " " + ErrorlineNo + line + "Error Message:" + " " + Errormsg + line + "Exception Type:" + " " + extype + line + "Error Location :" + " " + ErrorLocation + line + " Error Page Url:" + " " + exurl + line + "User Host IP:" + " " + hostIp + line;
                sw.WriteLine("-----------Exception Details on " + " " + DateTime.Now.ToString() + "-----------------");
                sw.WriteLine("-------------------------------------------------------------------------------------");
                sw.WriteLine(line);
                sw.WriteLine(error);
                sw.WriteLine("--------------------------------*End*------------------------------------------");
                sw.WriteLine(line);
                sw.Flush();
                sw.Close();

            }

        }
        catch (Exception e)
        {
            e.ToString();

        }
    }

}
try
   {
       //your code
  }
  catch (Exception ex)
  {
      ExceptionLogging.SendErrorToText(ex);

  }
Other option is to directly trace the errors on IIS
https://stackify.com/beyond-iis-logs-find-failed-iis-asp-net-requests/
Mark Tabor4y ago
Thanks as I have pointed my API project from IIS to my File system i mean the folder location where I have the code the application is made using mVC so these API are consumed by MObile application android so when I hit a button on android I can move to Visual studio debug points ? are you sure ? rijwan
Rijwan Ansari4y ago
You can implement swagger and test it through browser by passing same values in the parameters.
However, to debug in IIS hosted app check below article for step by step.
https://ourtechroom.com/tech/debug-iis-hosted-aspnet-web-application-visual-studio/