log4net custom appender

Hello all, I have a application that was originally a console App. Most of the stuff I have now changed to a more friendly UI using winforms. The only thing I am having problems with is getting log4net to append to a textbox.

my log4net config file.

and my appender class. in my mainform ServerGUI I call log.Warn("Testing warning");

but it does not append to my textbox.

Thanks

xml version="1.0" encoding="utf-8" ?>
<log4net>
<appender name="textboxAppender" type="ServerGUI.TextBoxAppender, ServerGUI">
<formName value="ServerGUI"/>
<textBoxName value="txtConsole"/>
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%date [%thread] %-5level %logger [%property{NDC}] - %message%newline" />
layout>
appender>
<root>
<level value="ALL" />
<appender-ref ref="textboxAppender" />
root>
log4net>

public class TextBoxAppender : AppenderSkeleton
{
private TextBox _textBox;
public TextBox AppenderTextBox
{
get
{
return _textBox;
}
set
{
_textBox = value;
}
}
public string FormName { get; set; }
public string TextBoxName { get; set; }
private Control FindControlRecursive(Control root, string textBoxName)
{
if (root.Name == textBoxName) return root;
foreach (Control c in root.Controls)
{
Control t = FindControlRecursive(c, textBoxName);
if (t != null) return t;
}
return null;
}
protected override void Append(log4net.Core.LoggingEvent loggingEvent)
{
if (_textBox == null)
{
if (String.IsNullOrEmpty(FormName) ||
String.IsNullOrEmpty(TextBoxName))
return;
Form form = Application.OpenForms[FormName];
if (form == null)
return;
_textBox = (TextBox)FindControlRecursive(form, TextBoxName);
if (_textBox == null)
return;
form.FormClosing += (s, e) => _textBox = null;
}
_textBox.BeginInvoke((MethodInvoker)delegate
{
_textBox.AppendText(RenderLoggingEvent(loggingEvent));
});
}
}

1 Reply

Know the answer? Post it — somebody with the same question will find it here.

Manas Mohapatra9y ago
Accepted answer
Regarding log4net appender, follow below links:

https://www.codeproject.com/articles/406634/creating-a-custom-log-net-appender

https://jonhilton.net/2008/07/23/log4net-custom-appender/

http://karlagius.com/2008/01/02/writing-a-custom-appender-for-log4net/