Data Entry Validation with Error Provider

To use this code, simply drag the errorProvider control onto the form, it appears in the list as a red exclamation mark. Add one textbox and one command button, now use this code in the button click event

private void button1_Click(object sender, System.EventArgs e)
    if(textBox1.Text =="")
        //NO DATA!
        errorProvider1.SetError(textBox1,"You need to enter a value");
    } else {

You set the error icon active if the data validation is not meet, in this case its if there is no text in the textbox, to hide the errorprovider again simply just include "" instead of putting text in the seterror. You can set the BlinkStyle of the provider to NeverBlink, AlwaysBlink and BlinkIfDifferentError.You can set those by the properties view in design time or in code in runtime. You can also change the icon at design time to whichever icon you like.

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Colin Harman MACITP I am 26 and live in sydney, australia. I enjoy drinking and going out, but I also enjoy writing programs + creating websites in my free time. I play golf and ski. One of my main intrests whe...


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