protected override void Render(HtmlTextWriter writer)
{
if (writer == null)
{
throw new ArgumentNullException("writer");
}
//
// Retrieve the ID of the error to display and read it from
// the log.
//
string errorId = StringEtc.MaskNull(this.Request.QueryString["id"]);
if (errorId.Length == 0)
{
return;
}
ErrorLogEntry errorEntry = this.ErrorLog.GetError(errorId);
if (errorEntry == null)
{
return;
}
//
// If we have a host (ASP.NET) formatted HTML message
// for the error then just stream it out as our response.
//
if (errorEntry.Error.WebHostHtmlMessage.Length != 0)
{
writer.Write(errorEntry.Error.WebHostHtmlMessage);
}
}
/// <summary>
/// Renders a collection as a table in HTML document body.
/// </summary>
/// <remarks>
/// This method is called by <see cref="RenderCollections"/> to
/// format a diagnostic collection from <see cref="Error"/> object.
/// </remarks>
protected virtual void RenderCollection(NameValueCollection collection, string caption)
{
if (collection == null || collection.Count == 0)
{
return;
}
HtmlTextWriter writer = this.Writer;
writer.RenderBeginTag(HtmlTextWriterTag.H1);
HttpUtility.HtmlEncode(caption, writer);
writer.RenderEndTag(); // </h1>
writer.WriteLine();
//
// Write a table with each key in the left column
// and its value in the right column.
//
writer.AddAttribute(HtmlTextWriterAttribute.Cellpadding, "5");
writer.AddAttribute(HtmlTextWriterAttribute.Cellspacing, "0");
writer.AddAttribute(HtmlTextWriterAttribute.Border, "1");
writer.AddAttribute(HtmlTextWriterAttribute.Width, "100%");
writer.RenderBeginTag(HtmlTextWriterTag.Table);
//
// Write the column headings.
//
writer.AddAttribute(HtmlTextWriterAttribute.Valign, "top");
writer.RenderBeginTag(HtmlTextWriterTag.Tr);
writer.AddAttribute(HtmlTextWriterAttribute.Align, "left");
writer.RenderBeginTag(HtmlTextWriterTag.Th);
writer.Write("Name");
writer.RenderEndTag(); // </th>
writer.AddAttribute(HtmlTextWriterAttribute.Align, "left");
writer.RenderBeginTag(HtmlTextWriterTag.Th);
writer.Write("Value");
writer.RenderEndTag(); // </th>
writer.RenderEndTag(); // </tr>
//
// Write the main body of the table containing keys
// and values in a two-column layout.
//
foreach (string key in collection.Keys)
{
writer.AddAttribute(HtmlTextWriterAttribute.Valign, "top");
writer.RenderBeginTag(HtmlTextWriterTag.Tr);
writer.RenderBeginTag(HtmlTextWriterTag.Td);
HttpUtility.HtmlEncode(key, writer);
writer.RenderEndTag(); // </td>
writer.RenderBeginTag(HtmlTextWriterTag.Td);
string value = StringEtc.MaskNull(collection[key]);
if (value.Length != 0)
{
HttpUtility.HtmlEncode(value, writer);
}
else
{
writer.Write(" ");
}
writer.RenderEndTag(); // </td>
writer.RenderEndTag(); // </tr>
}
writer.RenderEndTag(); // </table>
writer.WriteLine();
}
public static void AssertStringNotEmpty(string s)
{
BaseDebug.Assert(StringEtc.MaskNull(s).Length != 0);
}
/// <summary>
/// Schedules the error to be e-mailed synchronously.
/// </summary>
protected virtual void ReportError(Error error)
{
if (error == null)
{
throw new ArgumentNullException("error");
}
//
// Start by checking if we have a sender and a recipient.
// These values may be null if someone overrides the
// implementation of Init but does not override the
// MailSender and MailRecipient properties.
//
string sender = StringEtc.MaskNull(this.MailSender);
string recipient = StringEtc.MaskNull(this.MailRecipient);
if (sender.Length == 0 || recipient.Length == 0)
{
return;
}
//
// Create the mail, setting up the sender and recipient.
//
MailMessage mail = new MailMessage();
mail.From = new MailAddress(sender);
mail.To.Add(new MailAddress(recipient));
//
// Format the mail subject.
//
string subjectFormat = StringEtc.MaskNull(this.MailSubjectFormat);
if (subjectFormat.Length == 0)
{
subjectFormat = "Error ({1}): {0}";
}
mail.Subject = string.Format(subjectFormat, error.Message, error.Type);
//
// Format the mail body.
//
ErrorTextFormatter formatter = CreateErrorFormatter();
StringWriter bodyWriter = new StringWriter();
formatter.Format(bodyWriter, error);
mail.Body = bodyWriter.ToString();
switch (formatter.MimeType)
{
case "text/html": mail.IsBodyHtml = true; break;
case "text/plain": mail.IsBodyHtml = false; break;
default:
{
throw new ApplicationException(string.Format(
"The error mail module does not know how to handle the {1} media type that is created by the {0} formatter.",
formatter.GetType().FullName, formatter.MimeType));
}
}
//
// Provide one last hook to pre-process the mail and then send
// it off.
//
try
{
PreSendMail(mail, error);
SendMail(mail);
}
finally
{
DisposeMail(mail);
}
}