CODEWITHSUNDEEP
c#textbox
George
George

Reputation: 407

C# - Writing a log using a textbox

I am quite new to C# (I had an RS-232 problem recently) and am trying to write an small application which does various tasks behind the scenes and I want to create a log of messages to keep the user updated on what stage the application is at.

The log will just consist of simple one line messages.

I am currently using a textbox that is disabled so that the user cannot change it. I can obviously do multiple text lines using the \r\n characters at the end of a line, but when I come to write a 2nd set of messages they are written at the begining of the text box overwriting the first messages.

Can I change this to append rather than overwrite ? Also, will the text box automatically add a scroll barr when the text is more than the box can display ?

Upvotes: 11

Views: 23874

Answers (4)

sbecker
sbecker

Reputation: 584

A better option is to use:

TextBox.AppendText(string)

for example:

myTextBox.AppendText(newLogEntry + Environment.NewLine);

Which makes a multi line textbox scroll to the button as well as to avoid flickering of the scroll bar.

MSDN on TextBox.AppendText(string)

Upvotes: 6

Arsen Mkrtchyan
Arsen Mkrtchyan

Reputation: 50752

textBox1.Text +=  "new Log Message" + Environment.NewLine;

make the texbox not disabled, but readonly and the scrollbar will appear

Upvotes: 7

zweihander
zweihander

Reputation: 6295

You can append to the text using this piece of code:

myTextBox.Text += myLogText + Environment.NewLine;

Alternatively, you can use a ListBox.

Upvotes: 2

Austin Salonen
Austin Salonen

Reputation: 50235

To add it at the top:

textBox.Text = newText + Environment.NewLine + textBox.Text;

To append it:

textBox.Text += Environment.NewLine + newText;

Yes, a scroll bar is added automatically.

Upvotes: 4

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