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Web.config and working with custom error pages

Posted on 2009-04-06
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Last Modified: 2012-05-06
As far as I can tell the only way to load a custom error 404 page is through the web.config file.

web.config:
<error statusCode="404" redirect="/Page404Redirect.aspx"/>

What I would like to do is be able to load a custom error 404 page and also capture what the user typed in to get that page.

So the user types in http://www.testURL.com/URL_that_doesnt_exist.aspx
I want them to be redirected to the Error 404 page but also be able to capture that URL they typed in so I can better track where traffic is headed. Maybe make the error page a little more tailored to what the user typed in.

Just wondering if this is possible?

Thanks in advance.
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Question by:no158
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LVL 10

Expert Comment

by:Espavo
Comment Utility
In my Global.asax I have the following that sends me an error e-mail when an error occurs... you may be able to use some of it for your purposes...
One of the things I check for is ReferURL... (Which it seems you are after too...)

BTW, I bouce all my Errors back to Default.aspx... so from there it would be relatively easy to do custom redirects... (or error messages...)
 

   Sub Application_Error(ByVal sender As Object, ByVal e As EventArgs)

        ' Code that runs when an unhandled error occurs

        

        Dim ReferURL As String 'Try get the Referring URL that generated the error

        Try

            ReferURL = "http://" & Request.UrlReferrer.Host & Request.UrlReferrer.PathAndQuery

        Catch

            ReferURL = "Direct Call"

        End Try

        Dim ex As Exception = Server.GetLastError().GetBaseException()
 

        Dim MailBody As String = "<!DOCTYPE HTML PUBLIC ""-//W3C//DTD HTML 4.0 Transitional//EN""><html><body><font face=arial size=2>"

        MailBody &= "<b><u>Referring URL</u></b> :<br>&nbsp;<br><a href=""" & ReferURL & """>" & ReferURL & "</a><br>&nbsp;<br>"

        MailBody &= "<b><u>Message</u></b> :<br>&nbsp;<br>" & ex.Message.ToString & "<br>&nbsp;<br>"

        If Request.Form.ToString() <> "" Then MailBody &= "<b><u>Form</u></b> :<br>&nbsp;<br>" & Request.Form.ToString() & "<br>&nbsp;<br>"

        If Request.QueryString.ToString() <> "" Then MailBody &= "<b><u>QueryString</u></b> :<br>&nbsp;<br>" & Request.QueryString.ToString() & "<br>&nbsp;<br>"

        MailBody &= "<b><u>Source</u></b> :<br>&nbsp;<br>" & ex.Source.ToString & "<br>&nbsp;<br>"

        MailBody &= "<b><u>TargetSite</u></b> :<br>&nbsp;<br>" & ex.TargetSite.ToString & "<br>&nbsp;<br>"

        MailBody &= "<b><u>StackTrace</u></b> :<br>&nbsp;<br>" & ex.StackTrace.ToString & "<br>&nbsp;<br>"

        MailBody &= "</font></body></html>"
 

        Dim mm As New System.Net.Mail.MailMessage()

        mm.From = New System.Net.Mail.MailAddress(ConfigurationManager.AppSettings("ErrorMail:From"), ConfigurationManager.AppSettings("ErrorMail:FromName"))

        mm.To.Add(ConfigurationManager.AppSettings("ErrorMail:To"))

        mm.Subject = ConfigurationManager.AppSettings("ErrorMail:Subject")

        mm.Body = MailBody

        mm.IsBodyHtml = True
 

        Dim smtp As New System.Net.Mail.SmtpClient

        smtp.Send(mm)

    End Sub

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Author Comment

by:no158
Comment Utility
Would you happen to have that code in C#?

    void Application_Error(object sender, EventArgs e)
    {
        // Code that runs when an unhandled error occurs
    }
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Accepted Solution

by:
Espavo earned 500 total points
Comment Utility
I ran a quick conversion here:
http://www.developerfusion.com/tools/convert/vb-to-csharp/
Does this work for you?

public void Application_Error(object sender, EventArgs e)

{

    // Code that runs when an unhandled error occurs

    

    string ReferURL = null;

    //Try get the Referring URL that generated the error

    try {

        ReferURL = "http://" + Request.UrlReferrer.Host + Request.UrlReferrer.PathAndQuery;

    }

    catch {

        ReferURL = "Direct Call";

    }

    Exception ex = Server.GetLastError().GetBaseException();

    

    string MailBody = "<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.0 Transitional//EN\"><html><body><font face=arial size=2>";

    MailBody += "<b><u>Referring URL</u></b> :<br>&nbsp;<br><a href=\"" + ReferURL + "\">" + ReferURL + "</a><br>&nbsp;<br>";

    MailBody += "<b><u>Message</u></b> :<br>&nbsp;<br>" + ex.Message.ToString + "<br>&nbsp;<br>";

    if (!string.IsNullOrEmpty(Request.Form.ToString())) MailBody += "<b><u>Form</u></b> :<br>&nbsp;<br>" + Request.Form.ToString() + "<br>&nbsp;<br>"; 

    if (!string.IsNullOrEmpty(Request.QueryString.ToString())) MailBody += "<b><u>QueryString</u></b> :<br>&nbsp;<br>" + Request.QueryString.ToString() + "<br>&nbsp;<br>"; 

    MailBody += "<b><u>Source</u></b> :<br>&nbsp;<br>" + ex.Source.ToString + "<br>&nbsp;<br>";

    MailBody += "<b><u>TargetSite</u></b> :<br>&nbsp;<br>" + ex.TargetSite.ToString + "<br>&nbsp;<br>";

    MailBody += "<b><u>StackTrace</u></b> :<br>&nbsp;<br>" + ex.StackTrace.ToString + "<br>&nbsp;<br>";

    MailBody += "</font></body></html>";

    

    System.Net.Mail.MailMessage mm = new System.Net.Mail.MailMessage();

    mm.From = new System.Net.Mail.MailAddress(ConfigurationManager.AppSettings("ErrorMail:From"), ConfigurationManager.AppSettings("ErrorMail:FromName"));

    mm.To.Add(ConfigurationManager.AppSettings("ErrorMail:To"));

    mm.Subject = ConfigurationManager.AppSettings("ErrorMail:Subject");

    mm.Body = MailBody;

    mm.IsBodyHtml = true;

    

    System.Net.Mail.SmtpClient smtp = new System.Net.Mail.SmtpClient();

    smtp.Send(mm);

}

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Author Comment

by:no158
Comment Utility
With some minor tweaks to the code I got it to compile. I also changed the mail API since this one works better with our server, we know this because of other web applications and little problems we experienced along the way. I also stripped out the calls to the web.config since we don't have our variables setup that way. I do appreciate the professional touch though ;)

The problem I seem to be running into is that the emails are not being sent. I tried to remove the custom page in order to trigger this function but it does not seem to do the trick. Can you tell me how the Global.asax works and what I must do in order to make that function call run. I was under the assumption it would run before any of the custom pages would.
void Application_Error(object sender, EventArgs e) 

{ 

// Code that runs when an unhandled error occurs

    

string ReferURL = null;
 

//Try get the Referring URL that generated the error

    try {

        ReferURL = "http://" + Request.UrlReferrer.Host + Request.UrlReferrer.PathAndQuery;

    }

    catch {

        ReferURL = "Direct Call";

    }

    Exception ex = Server.GetLastError().GetBaseException();
 

    string MailBody = "<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.0 Transitional//EN\"><html><body><font face=arial size=2>";

    MailBody += "<b><u>Referring URL</u></b> :<br> <br><a href=\"" + ReferURL + "\">" + ReferURL + "</a><br> <br>";

    MailBody += "<b><u>Message</u></b> :<br> <br>" + ex.Message.ToString() + "<br> <br>";

    if (!string.IsNullOrEmpty(Request.Form.ToString())) MailBody += "<b><u>Form</u></b> :<br> <br>" + 
 

Request.Form.ToString() + "<br> <br>"; 

    if (!string.IsNullOrEmpty(Request.QueryString.ToString())) MailBody += "<b><u>QueryString</u></b> 
 

:<br> <br>" + Request.QueryString.ToString() + "<br> <br>"; 

    MailBody += "<b><u>Source</u></b> :<br> <br>" + ex.Source.ToString() + "<br> <br>";

    MailBody += "<b><u>TargetSite</u></b> :<br> <br>" + ex.TargetSite.ToString() + "<br> <br>";

    MailBody += "<b><u>StackTrace</u></b> :<br> <br>" + ex.StackTrace.ToString() + "<br> <br>";

    MailBody += "</font></body></html>";

    
 

System.Web.Mail.MailMessage Mailer = new System.Web.Mail.MailMessage();

Mailer.From = "ALERT@DOMAIN.COM";

Mailer.To = "USERNAME@DOMAIN.com";

Mailer.Subject = "Web Alert - General Error";

//Mailer.BodyFormat = MailFormat.Html;

Mailer.Body = MailBody;

System.Web.Mail.SmtpMail.Send(Mailer);

}

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Author Comment

by:no158
Comment Utility
FYI

The html format didn't seem to compile so I removed it. The mail should still go through even with the html code in the strings, it will just display it as text.
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LVL 10

Expert Comment

by:Espavo
Comment Utility
To start with, you said:
As far as I can tell the only way to load a custom error 404 page is through the web.config file.
This not 100% correct... ASP.Net will handle "ASP" errors and do the redirecting based on your web.config... if the error is a "non-ASP.Net" error than IIS will handle the error... (.htm page not found, for example)
Something that I have done is I've created a "404Redirector" that picks-up "htm not-found" errors, and redirects them to a specific .aspx page that can then handle output... (This is a great way for making dynamic sites SEO friendly...)
You need to configure IIS Custom Error pages (404) to use the
Action: "URL"
Value: "/404Redirect.aspx" as the page to direct to...
Here's the VB code... (and the converted C#)
(Converted at http://converter.telerik.com/)

VB

==
 

Imports System.Data.SqlClient
 

Partial Class _404Redirect

    Inherits System.Web.UI.Page

    Public defaultURL, DefaultPage As String

    Private conn0 As New SqlConnection(ConfigurationManager.ConnectionStrings("connSQL").ConnectionString)
 
 

    Private Sub Page_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load

        DefaultPage = ConfigurationManager.AppSettings("DefaultPage")

        Dim HTTP_HOST As String = "http://" & LCase(Request.ServerVariables("HTTP_HOST")) & "/"

        If HTTP_HOST Like "*glp*" Then

            HTTP_HOST &= "CProp/"

        End If
 

        defaultURL = HTTP_HOST & DefaultPage
 

        Dim Get404 As System.Collections.Specialized.NameValueCollection

        Dim chk404 As String
 

        Get404 = Request.QueryString

        chk404 = LCase(Server.UrlDecode(Get404.ToString))

        'chk404 = Server.UrlDecode(Get404.ToString)
 

        Dim SplitURL As Array = Array.CreateInstance(GetType(String), 0)

        Try

            SplitURL = Split(chk404, "/")

        Catch

            Response.Redirect(defaultURL)

        End Try

        chk404 = SplitURL(SplitURL.GetUpperBound(0))
 

        Dim whole404 = LCase(Server.UrlDecode(Get404.ToString))
 

        'Get the PageName (The piece in front of the .htm)

        'If InStr(chk404, ".") > 0 Then chk404 = Left(chk404, (InStr(chk404, ".") - 1))
 

        If chk404 <> "" Then
 

            If whole404.ToLower.Contains("getfile") Then

                Server.Transfer("getFile.aspx?mediaId=" & GetFileId(SplitURL(SplitURL.GetUpperBound(0))))

            ElseIf whole404.ToLower.Contains("ssdata") Then

                GetSSData(SplitURL(SplitURL.GetUpperBound(0)))

            ElseIf whole404.ToLower.Contains("sspic") Then

                GetSSPic(SplitURL(SplitURL.GetUpperBound(0)))

            ElseIf whole404.ToLower.Contains("ssvid") Then

                GetSSVideo(SplitURL(SplitURL.GetUpperBound(0)))

            ElseIf whole404.ToLower.Contains("sstvid") Then

                GetSSPicT(SplitURL(SplitURL.GetUpperBound(0)))

            ElseIf whole404.ToLower.Contains("getthumbnail") Then

                Server.Transfer("pic.aspx?i=" & GetThumbnailId(SplitURL(SplitURL.GetUpperBound(0))) & "&h=" & SplitURL(SplitURL.GetUpperBound(0) - 1) & "&w=" & SplitURL(SplitURL.GetUpperBound(0) - 2) & "&tbl=MediaThumbnails&col=ThumbnailId")

            ElseIf whole404.ToLower.Contains("getimage") Then

                Server.Transfer("picG.aspx?i=" & GetImageId(SplitURL(SplitURL.GetUpperBound(0))) & "&h=" & SplitURL(SplitURL.GetUpperBound(0) - 1) & "&w=" & SplitURL(SplitURL.GetUpperBound(0) - 2))

            Else

                Dim cmd As New SqlCommand("SELECT PageID FROM Pages WHERE PageFilename = '" & chk404 & "'", conn0)

                conn0.Open() : Dim PageID As Integer = cmd.ExecuteScalar() : conn0.Close() : cmd.Dispose()
 

                If PageID > 0 Then

                    Dim cmd0 As New SqlCommand("SELECT uID FROM SiteMap WHERE (PageID = " & PageID & ") ORDER BY ID DESC", conn0)

                    conn0.Open() : Dim uID As Integer = cmd0.ExecuteScalar() : conn0.Close() : cmd.Dispose()

                    'If InStr(chk404, ".") > 0 Then chk404 = Left(chk404, (InStr(chk404, ".") - 1))

                    'Response.Redirect("default.aspx?GetPage=" & chk404 & "&MenuID=" & uID)

                    Server.Transfer("default.aspx?GetPage=" & chk404 & "&MenuID=" & uID)

                Else

                    Response.Redirect(defaultURL)

                End If

            End If
 
 
 

        Else

            Response.Redirect(defaultURL)

        End If
 

    End Sub
 

    Private Function GetFileId(ByVal filename404 As String) As String

        filename404 = Replace(filename404, "getfile", "")

        If filename404.Contains(".") = True Then

            'Return (Right(filename404, filename404.Length - filename404.LastIndexOf(".") - 1))

            Return Left(filename404, filename404.LastIndexOf("."))

        Else

            Return ""

        End If

    End Function
 

    Private Function GetImageId(ByVal filename404 As String) As String

        filename404 = Replace(filename404, "getimage", "")

        If filename404.Contains(".") = True Then

            'Return (Right(filename404, filename404.Length - filename404.LastIndexOf(".") - 1))

            Return Left(filename404, filename404.LastIndexOf("."))

        Else

            Return ""

        End If

    End Function
 

    Private Function GetThumbnailId(ByVal filename404 As String) As String

        filename404 = Replace(filename404, "getthumbnail", "")

        If filename404.Contains(".") = True Then

            'Return (Right(filename404, filename404.Length - filename404.LastIndexOf(".") - 1))

            Return Left(filename404, filename404.LastIndexOf("."))

        Else

            Return ""

        End If

    End Function
 

    Private Sub GetSSData(ByVal filename404 As String)

        'The Image Name is made-up of SSPic_i_w_h.jpg

        Dim SplitFName As Array = Array.CreateInstance(GetType(String), 0)

        SplitFName = Split(Left(filename404, filename404.LastIndexOf(".")), "_")
 

        Server.Transfer("~/SlideShow/SSData.aspx?pr=" & SplitFName(SplitFName.GetUpperBound(0)))

    End Sub
 

    Private Sub GetSSPic(ByVal filename404 As String)

        'The Image Name is made-up of SSPic_i_w_h.jpg

        Dim SplitFName As Array = Array.CreateInstance(GetType(String), 0)

        SplitFName = Split(Left(filename404, filename404.LastIndexOf(".")), "_")
 

        Server.Transfer("~/picG.aspx?i=" & SplitFName(SplitFName.GetUpperBound(0) - 2) & "&w=" & SplitFName(SplitFName.GetUpperBound(0) - 1) & "&h=" & SplitFName(SplitFName.GetUpperBound(0)))

    End Sub
 

    Private Sub GetSSVideo(ByVal filename404 As String)

        'The Image Name is made-up of SSPic_i_w_h.jpg

        Dim SplitFName As Array = Array.CreateInstance(GetType(String), 0)

        SplitFName = Split(Left(filename404, filename404.LastIndexOf(".")), "_")
 

        Server.Transfer("~/getFile.aspx?mediaId=" & SplitFName(SplitFName.GetUpperBound(0)))

    End Sub
 

    Private Sub GetSSPicT(ByVal filename404 As String)

        'The Image Name is made-up of SSPic_i_w_h.jpg

        Dim SplitFName As Array = Array.CreateInstance(GetType(String), 0)

        SplitFName = Split(Left(filename404, filename404.LastIndexOf(".")), "_")
 

        Response.Redirect("~/picT.aspx?i=" & SplitFName(SplitFName.GetUpperBound(0) - 2) & "&w=" & SplitFName(SplitFName.GetUpperBound(0) - 1) & "&h=" & SplitFName(SplitFName.GetUpperBound(0)))

    End Sub

End Class
 
 

C#

==
 

using System.Data.SqlClient;
 

partial class _404Redirect : System.Web.UI.Page

{

	public string defaultURL;

	public string DefaultPage;

	private SqlConnection conn0 = new SqlConnection(ConfigurationManager.ConnectionStrings("connSQL").ConnectionString);
 
 

	private void  // ERROR: Handles clauses are not supported in C#

Page_Load(System.Object sender, System.EventArgs e)

	{

		DefaultPage = ConfigurationManager.AppSettings("DefaultPage");

		string HTTP_HOST = "http://" + LCase(Request.ServerVariables("HTTP_HOST")) + "/";

		if (HTTP_HOST // ERROR: Unknown binary operator Like

) {

			HTTP_HOST += "CProp/";

		}
 

		defaultURL = HTTP_HOST + DefaultPage;
 

		System.Collections.Specialized.NameValueCollection Get404;

		string chk404;
 

		Get404 = Request.QueryString;

		chk404 = LCase(Server.UrlDecode(Get404.ToString));

		//chk404 = Server.UrlDecode(Get404.ToString)
 

		Array SplitURL = Array.CreateInstance(typeof(string), 0);

		try {

			SplitURL = Split(chk404, "/");

		}

		catch {

			Response.Redirect(defaultURL);

		}

		chk404 = SplitURL(SplitURL.GetUpperBound(0));
 

		object whole404 = LCase(Server.UrlDecode(Get404.ToString));
 

		//Get the PageName (The piece in front of the .htm)

		//If InStr(chk404, ".") > 0 Then chk404 = Left(chk404, (InStr(chk404, ".") - 1))
 

		if (chk404 != "") {
 

			if (whole404.ToLower.Contains("getfile")) {

				Server.Transfer("getFile.aspx?mediaId=" + GetFileId(SplitURL(SplitURL.GetUpperBound(0))));

			}

			else if (whole404.ToLower.Contains("ssdata")) {

				GetSSData(SplitURL(SplitURL.GetUpperBound(0)));

			}

			else if (whole404.ToLower.Contains("sspic")) {

				GetSSPic(SplitURL(SplitURL.GetUpperBound(0)));

			}

			else if (whole404.ToLower.Contains("ssvid")) {

				GetSSVideo(SplitURL(SplitURL.GetUpperBound(0)));

			}

			else if (whole404.ToLower.Contains("sstvid")) {

				GetSSPicT(SplitURL(SplitURL.GetUpperBound(0)));

			}

			else if (whole404.ToLower.Contains("getthumbnail")) {

				Server.Transfer("pic.aspx?i=" + GetThumbnailId(SplitURL(SplitURL.GetUpperBound(0))) + "&h=" + SplitURL(SplitURL.GetUpperBound(0) - 1) + "&w=" + SplitURL(SplitURL.GetUpperBound(0) - 2) + "&tbl=MediaThumbnails&col=ThumbnailId");

			}

			else if (whole404.ToLower.Contains("getimage")) {

				Server.Transfer("picG.aspx?i=" + GetImageId(SplitURL(SplitURL.GetUpperBound(0))) + "&h=" + SplitURL(SplitURL.GetUpperBound(0) - 1) + "&w=" + SplitURL(SplitURL.GetUpperBound(0) - 2));

			}

			else {

				SqlCommand cmd = new SqlCommand("SELECT PageID FROM Pages WHERE PageFilename = '" + chk404 + "'", conn0);

				conn0.Open();

				int PageID = cmd.ExecuteScalar();

				conn0.Close();

				cmd.Dispose();
 

				if (PageID > 0) {

					SqlCommand cmd0 = new SqlCommand("SELECT uID FROM SiteMap WHERE (PageID = " + PageID + ") ORDER BY ID DESC", conn0);

					conn0.Open();

					int uID = cmd0.ExecuteScalar();

					conn0.Close();

					cmd.Dispose();

					//If InStr(chk404, ".") > 0 Then chk404 = Left(chk404, (InStr(chk404, ".") - 1))

					//Response.Redirect("default.aspx?GetPage=" & chk404 & "&MenuID=" & uID)

					Server.Transfer("default.aspx?GetPage=" + chk404 + "&MenuID=" + uID);

				}

				else {

					Response.Redirect(defaultURL);

				}

			}

		}
 
 
 

		else {

			Response.Redirect(defaultURL);

		}
 

	}
 

	private string GetFileId(string filename404)

	{

		filename404 = Replace(filename404, "getfile", "");

		if (filename404.Contains(".") == true) {

			//Return (Right(filename404, filename404.Length - filename404.LastIndexOf(".") - 1))

			return Left(filename404, filename404.LastIndexOf("."));

		}

		else {

			return "";

		}

	}
 

	private string GetImageId(string filename404)

	{

		filename404 = Replace(filename404, "getimage", "");

		if (filename404.Contains(".") == true) {

			//Return (Right(filename404, filename404.Length - filename404.LastIndexOf(".") - 1))

			return Left(filename404, filename404.LastIndexOf("."));

		}

		else {

			return "";

		}

	}
 

	private string GetThumbnailId(string filename404)

	{

		filename404 = Replace(filename404, "getthumbnail", "");

		if (filename404.Contains(".") == true) {

			//Return (Right(filename404, filename404.Length - filename404.LastIndexOf(".") - 1))

			return Left(filename404, filename404.LastIndexOf("."));

		}

		else {

			return "";

		}

	}
 

	private void GetSSData(string filename404)

	{

		//The Image Name is made-up of SSPic_i_w_h.jpg

		Array SplitFName = Array.CreateInstance(typeof(string), 0);

		SplitFName = Split(Left(filename404, filename404.LastIndexOf(".")), "_");
 

		Server.Transfer("~/SlideShow/SSData.aspx?pr=" + SplitFName(SplitFName.GetUpperBound(0)));

	}
 

	private void GetSSPic(string filename404)

	{

		//The Image Name is made-up of SSPic_i_w_h.jpg

		Array SplitFName = Array.CreateInstance(typeof(string), 0);

		SplitFName = Split(Left(filename404, filename404.LastIndexOf(".")), "_");
 

		Server.Transfer("~/picG.aspx?i=" + SplitFName(SplitFName.GetUpperBound(0) - 2) + "&w=" + SplitFName(SplitFName.GetUpperBound(0) - 1) + "&h=" + SplitFName(SplitFName.GetUpperBound(0)));

	}
 

	private void GetSSVideo(string filename404)

	{

		//The Image Name is made-up of SSPic_i_w_h.jpg

		Array SplitFName = Array.CreateInstance(typeof(string), 0);

		SplitFName = Split(Left(filename404, filename404.LastIndexOf(".")), "_");
 

		Server.Transfer("~/getFile.aspx?mediaId=" + SplitFName(SplitFName.GetUpperBound(0)));

	}
 

	private void GetSSPicT(string filename404)

	{

		//The Image Name is made-up of SSPic_i_w_h.jpg

		Array SplitFName = Array.CreateInstance(typeof(string), 0);

		SplitFName = Split(Left(filename404, filename404.LastIndexOf(".")), "_");
 

		Response.Redirect("~/picT.aspx?i=" + SplitFName(SplitFName.GetUpperBound(0) - 2) + "&w=" + SplitFName(SplitFName.GetUpperBound(0) - 1) + "&h=" + SplitFName(SplitFName.GetUpperBound(0)));

	}

}

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Author Comment

by:no158
Comment Utility
As far as I know the Global.asax page will load when an application-level event is raised by ASP.NET. So a 404 should trigger the "void Application_Error(object sender, EventArgs e)" function. Yet I'm not getting any emails so something is not working here. I noticed that the Global.asax file does not define any APIs at the top, will this affect the mail functions?
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LVL 10

Expert Comment

by:Espavo
Comment Utility
Only an ASPX 404 Error will will load the application-level event sub in Global.asax... (So if you were looking for TestPage.aspx and it doesn't exist then the sub will be triggered... if the file is TestPage.htm that you are looking for, and it doesn't exist, then IIS will handle the error...)

Note that ALL ASPX errors trigger the Sub in Global.asax...
API's don't need to be specified at the top IF they are included in the code itself... which is the case here...
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Author Comment

by:no158
Comment Utility
The picture is becoming much clearer.

So just entering in the code in the Application_Error(object sender, EventArgs e) will be sufficient to send the emails, as long as there is an ASP 404 Error?

If this is true I don't understand why I'm not getting emails, any ideas?
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Author Comment

by:no158
Comment Utility
I tried http://localhost/pageThatDoesntExist.aspx and I get the server applicatoin error but no email.
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Expert Comment

by:Espavo
Comment Utility
Are you able to send yourself an e-mail from a "normal" .aspx page?

If yes, how is that code different to what's in the Global.asax page?
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Expert Comment

by:Espavo
Comment Utility
Just thinking... do you have the mailsettings in your Web.Config?
<system.net>
<mailSettings>
<smtp from="webmaster@somedomain.com">
<network host="mail.somedomeain.com" password="password" userName="apps@somedomain.com"/>
</smtp>
</mailSettings>
</system.net>
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Author Comment

by:no158
Comment Utility
The email code is exactly the same as another application that is currently running on the site and I just tested it, it's working as intended.

No, I don't have my email settings listed in the web.config.
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Expert Comment

by:Espavo
Comment Utility
Have you tried putting a Break-Point in the code, and debugging it?
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Author Comment

by:no158
Comment Utility
Thanks so much for your help.

The reason it wasn't working is because I was working on a beta box, which does not have an smtp setup.

Silly me...

Thanks again, HUGE HELP :)
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Foreword (July, 2015) Since I first wrote this article, years ago, a great many more people have begun using the internet.  They are coming online from every part of the globe, learning, reading, shopping and spending money at an ever-increasing ra…
I've been asked to discuss some of the UX activities that I'm using with my team. Here I will share some details about how we approach UX projects.
Explain concepts important to validation of email addresses with regular expressions. Applies to most languages/tools that uses regular expressions. Consider email address RFCs: Look at HTML5 form input element (with type=email) regex pattern: T…
This tutorial walks through the best practices in adding a local business to Google Maps including how to properly search for duplicates, marker placement, and inputing business details. Login to your Google Account, then search for "Google Mapmaker…

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