How to change font and font size manually

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It need to display one word in one font and next line other font .
In Given sample program the last set font is applied for the entire text

What I have tried:

RichTextBox.Font = new Font("Arial", 14, FontStyle.Bold);
           RichTextBox.Text = Form1.FN+" "+Form1.LN+"\n";
           RichTextBox.Font = new Font("Arial", 10);
           RichTextBox.Text +=("Mobile: " )+ Form1.M;

Posted 22-Sep-18 5:40am

49R

Updated 22-Sep-18 5:58am

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Dave Kreskowiak · Accepted Answer · 2018-09-22T05:59:00

Solution 1

You might want to read the documentation on the RichTextBox control[^]. There, you'll find various properties beginning with "Selection". Use the SelectionStart and SelectionLength properties where you can select text and then use the other properties to make changes to the selected text, such as SelectionFont.

Posted 22-Sep-18 5:59am

Dave Kreskowiak

Comments

49R 22-Sep-18 12:35pm

RichTextBox.SelectionFont = new Font("Arial", 14, FontStyle.Bold);
RichTextBox.AppendText(Form1.FN + " " + Form1.LN + "\n");
RichTextBox.SelectionFont = new Font("Arial", 10);
RichTextBox.AppendText("Mobile: " + Form1.M);

got it Thank you

Dave Kreskowiak 22-Sep-18 13:24pm

Great. You have now a much bigger problem.

You're creating new Font objects every time this code runs. Font object hold onto unmannaged, and limited, GDI resources. You never dispose of these created objects, but you created them without any upper limit. This means your code leaks resources and will, if done enough, will crash Windows.

Create your Font objects at the class level and you can reuse them, over and over, without creating new ones. Then, when your app exists, you can call Dispose on those Font objects and properly release the resources they are holding onto.