Convert first letter in a string to capital

Posted on 2014-10-21
Last Modified: 2014-10-21
I have a Text Box, (say txtBox1) which I am asking the user to enter some text in.
I need to check if the first letter in the box's text is uppercase.
If not uppercase convert ONLY the first letter to uppercase and keep the remaining letters as lowercase.

Thank you
Question by:adamtrask
  • 3
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Expert Comment

ID: 40395461
There might be more efficient ways to do this, but this will give you the result your looking for.  In the Leave event for your text box drop in this line of code.

        private void textBox1_Leave(object sender, EventArgs e)
            textBox1.Text = textBox1.Text[0].ToString().ToUpper() + textBox1.Text.Substring(1);

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Author Comment

ID: 40395595
Thank you. This partly works as it changes the first letter to uppercase, but if the user enters an uppercase letter in the middle of the word like "adAm"? It would become AdAm!

Is there a way to convert the rest of the text to lowercase?


Accepted Solution

dustock earned 500 total points
ID: 40395639
Yeah, not a problem, you just need to add a .ToLower() to the second part like below.

textBox1.Text = textBox1.Text[0].ToString().ToUpper() + textBox1.Text.Substring(1).ToLower();

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Author Closing Comment

ID: 40395693
Thank you so much.

Expert Comment

ID: 40395696
No problem, glad I could help.

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