Text Box Error

Question

I would like to display an error on the textbox if i left it empty. Some thing like the text box should get highlighted with some sort of color when i submit .

Todd Burrell · Answer

This should give you the idea: protected void submitButtonClick(object sender EventArgs e) { if (TextBox1.Text == ) { TextBox1.BackColor = System.Drawing.Color.Yellow; return; } else { //do something else } }