private void TxtBox_SideA_TextChanged(object sender, EventArgs e) { validateInput(TxtBox_SideA, ref isValidSideA, ref sideA); /* check if error message needs to be outputed */ if (!isValidSideA && TxtBox_SideA.Text != "") { //output error message Lbl_ErrorMessage_SideA.Text = MESSAGE; Lbl_ErrorMessage_SideA.ForeColor = Color.Red; Lbl_ErrorMessage_SideA.Show(); Lbl_OutputText.Hide(); } else if (isValidSideA && isValidSideB && isValidSideC) { //get message from triangle Lbl_OutputText.Text = DetermineTriangle(); //display the message Lbl_OutputText.Show(); Lbl_ErrorMessage_SideA.Hide(); } else { Lbl_ErrorMessage_SideA.Hide(); } }
private void Form1_Load(object sender, EventArgs e) { Lbl_ErrorMessage_SideA.Hide(); Lbl_ErrorMessage_SideB.Hide(); Lbl_ErrorMessage_SideC.Hide(); Lbl_OutputText.Hide(); }