Need real error message

Question

User546194788 posted

To display general error message I added the following code in web.config as below in which will display a message:

<customErrors mode="RemoteOnly" defaultRedirect="~/ErrorPages/GeneralErrorPage.htm" />

Order apps is not available now. Please check it later

I want to disable these code and get real error message.

Is there any to have apps send me (e.g. Email me) the real error like web server event viewer?

Answer 1

User409696431 posted

Refer to https://imar.spaanjaars.com/268/how-do-i-handle-errors-and-send-an-error-notification-from-aspnet-applications

It describes adding code to Gobal.aspx's code behind page to catch errors and email them to you.  You still show the friendly error page to your site visitors.

Answer 2

User1120430333 posted

You can use Log4Net and log the error.

https://stackify.com/csharp-catch-all-exceptions/

https://www.c-sharpcorner.com/UploadFile/db2972/error-logging-using-log4net-in-web-application/

Answer 3

User-1174608757 posted

Hi aspfun,

According to your description, I suggest you could write you logic in application_ error method in Gloab.asax and then you could catch the detail about error  and  send an  email about error message.

You could write as below:

 void Application_Error(object sender, EventArgs e)
        {
            Exception objErr = Server.GetLastError().GetBaseException();
            string err = "<br><b>Error in: </b>" + Request.Url.ToString() +
                "<br><b>Error Message: </b>" + objErr.Message.ToString() +
                "<br><b>Stack Trace:</b><br>" + objErr.StackTrace.ToString();
            //Email sending method
            Email.Send("[e-mail]", "Error", err, true);
        }

Here is the link I hope it could help you.

https://stackoverflow.com/questions/11807891/how-to-send-error-info-mail-if-any-error-occurred-in-web-application

Best Regards

Wei

Answer 4

User546194788 posted

Hi Wei Zhang, 

I used your way and open the link.

But, the system error display as below instead of email.

Server Error in '/' Application.

---

Configuration Error

Description: An error occurred during the processing of a configuration file required to service this request. Please review the specific error details below and modify your configuration file appropriately.

Parser Error Message: Could not load file or assembly 'XXXXXXX'

Source Error:

...........................................

Answer 5

User546194788 posted

I follow the link below and added code.

https://stackoverflow.com/questions/11807891/how-to-send-error-info-mail-if-any-error-occurred-in-web-application

void Application_Error(object sender, EventArgs e) 
    {
        Exception objErr = Server.GetLastError().GetBaseException();
        string err = "<br><b>Error in: </b>" + Request.Url.ToString() +
            "<br><b>Error Message: </b>" + objErr.Message.ToString() +
            "<br><b>Stack Trace:</b><br>" + objErr.StackTrace.ToString();
       //Email sending method
       Email.Send("[e-mail]", "Error", err, true);
    }

Web.config:

<customErrors mode="Off" defaultRedirect="Customerrorpage.aspx">
      <error statusCode="404" redirect="Error404.aspx" />
</customErrors>

Customerrorpage.aspx : (Auto redirect to login page in few sec)

protected void Page_Load(object sender, EventArgs e)
    {
        Response.AppendHeader("Refresh", "4; url=Login.aspx");
    }

Answer 6

User546194788 posted

I tried KathW's way, it works great!

Thank you.

Answer 7

User546194788 posted

I followed KathyW's way from the link below to add error tracking. It works fine but did not indicate the line of code.

Here is the error is caught but I still don't know which code to cause it.

Message

Invalid length for a Base-64 char array.

Source

mscorlib

Target site

Byte[] FromBase64String(System.String)

 

Stack trace

   at System.Convert.FromBase64String(String s)

   at System.Web.UI.ObjectStateFormatter.Deserialize(String inputString)

   at System.Web.UI.ObjectStateFormatter.System.Web.UI.IStateFormatter.Deserialize(String serializedState)

   at System.Web.UI.Util.DeserializeWithAssert(IStateFormatter formatter, String serializedState)

   at System.Web.UI.HiddenFieldPageStatePersister.Load()

 

ToString()

System.FormatException: Invalid length for a Base-64 char array.

   at System.Convert.FromBase64String(String s)

   at System.Web.UI.ObjectStateFormatter.Deserialize(String inputString)

   at System.Web.UI.ObjectStateFormatter.System.Web.UI.IStateFormatter.Deserialize(String serializedState)

   at System.Web.UI.Util.DeserializeWithAssert(IStateFormatter formatter, String serializedState)

   at System.Web.UI.HiddenFieldPageStatePersister.Load()