Change the first letter of the Text Box into Upper Case

How to change the first letter of the Text Box into Upper Case

            In this blog, I am going to explain how to change the first letter of the text box control into uppercase. For this, you need to write a JavaScript code.

First create an asp.net text box control in the page, as given below.

<asp:TextBox ID="FirstName" onchange = "convert(this);" runat="server"></asp:TextBox>

The method name convert() is used to call a JavaScript function. Define the method as given below.

<script type="text/javascript" language="JavaScript">

function convert(controlname)

{

 

    return;

}

</script>

When the text box lost its focus will change the first letter of the word into upper case.