A problem with selectioncolor in richtextbox

Question

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I have a problem with follow code:

C#

private void richTextBox1_TextChanged(object sender, EventArgs e)
{
    richTextBox1.SelectionColor = Color.Red;
}
private void richTextBox1_KeyPress(object sender, KeyPressEventArgs e)
{
    if (e.KeyChar == '\t')
    {
        e.Handled = true;
        richTextBox1.Text += "hell0;
    }
}

I only want when I press tab key, richtextbox add "hell0".and text in richtextbox not change color. but it change black. I don't know why.
please help me! thank so much.

Posted 6-Mar-11 21:41pm

trieuquangphuc_cf

Updated 6-Mar-11 21:44pm

Prerak Patel

v2

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3 solutions

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This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

Ryan Zahra · Answer 1 · 2011-03-06T22:11:00

Solution 3

Make sure that the property TabStop is set to False

Posted 6-Mar-11 22:11pm

Ryan Zahra

Comments

OriginalGriff 7-Mar-11 4:26am

I think you mean "AcceptsTab" and "true"...

Ryan Zahra 7-Mar-11 4:29am

I tested with "TabStop" and "False" and it worked fine...

OriginalGriff 7-Mar-11 4:36am

TabStop just says that Windows should move to it from another control (i.e. if it appears in teh tab order). AcceptsTab decides if the tab key should be passed to the KeyPress event: the default is false...

Ryan Zahra 7-Mar-11 4:38am

You're right. Thanks for clearing it up :)

OriginalGriff 7-Mar-11 4:39am

No problem! :laugh:

Thomas Daniels · Answer 2 · 2012-08-23T05:54:00

The KeyPress event is raising before the TextChanged event.
First, make sure that the TabStop property is false.
Second, the += operator doesn't work for changing text color. So, you need to change the code into this:

C#

private void richTextBox1_TextChanged(object sender, EventArgs e)
{

}
private void richTextBox1_KeyPress(object sender, KeyPressEventArgs e)
{
    if (e.KeyChar == '\t')
    {
        richTextBox1.SelectionColor = Color.Red; // set selection color to red before appending text
        e.Handled = true;
        richTextBox1.AppendText("hell0"); // change richTextBox1.Text += "hell0" into richTextBox1.AppendText("hell0");
    }
}

Hope this helps.

Abhinav S · Answer 3 · 2011-03-06T22:05:00

Solution 2

If I've understood your question, you need to change the color of "hello" to black.
You can select "hello" in the text and then change color just for that piece of selected to black.

Posted 6-Mar-11 22:05pm

Abhinav S

A problem with selectioncolor in richtextbox

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A problem with selectioncolor in richtextbox

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