如何在不将最后一行留空的情况下向richtextbox添加新行？

Question

I'm making a log system for a program im creating and I currently have it to where it does this:

void outToLog(string output)
{
    logRichTextBox.AppendText(output + "\r\n");
    logRichTextBox.ScrollToCaret();
}

But it ends up outputting the last line of the RichTextBox as blank (because I'm using \\n ) and I want the last line to just be whatever the output was, not a blank line. An alternative was for me to put the "\\r\\n" at the beginning, but this just has the same affect except its at the beginning of the RichTextBox .

help? thanks

Answer 1

Append the text after the newline.

void outToLog(string output)
{
    logRichTextBox.AppendText("\r\n" + output);
    logRichTextBox.ScrollToCaret();
}

If you don't want the newline at the start, check the TextBox for empty text and only add the \\r\\n when the TextBox is not empty.

void outToLog(string output)
{
    if(!string.IsNullOrWhiteSpace(logRichTextBox.Text))
    {
        logRichTextBox.AppendText("\r\n" + output);
    }
    else
    {
        logRichTextBox.AppendText(output);
    }
    logRichTextBox.ScrollToCaret();
}

Answer 2

Eh, why not check ? If text box is empty - just put the output, but if text box is not empty , add a new line and then append the the output.

void outToLog(string output)
{
    if (String.IsNullOrEmpty(logRichTextBox.Text)) 
        logRichTextBox.AppendText(output);
    else
        logRichTextBox.AppendText(Environment.NewLine + output);

    logRichTextBox.ScrollToCaret();
}