check multiple textboxes is emty oe not at a time

Question

My textBoxes Is contained on panel3 and panel3 is above on panel2

I want validate textboxes my code is

public void ClearTextBoxes(Control.ControlCollection cc)

{

foreach (Control ctrl in cc)

{

TextBox tb = ctrl as TextBox;

if (tb == null)

messagebox.show("Empty Textbox Found");

}

but It Throws an error -"Object refference not set an instance of an object"

Murli Jadhav · Answer

# Manikandan Murugesan It Is Not Work For Me Because all of my textboxes is on panels

Manikandan Murugesan · Answer

Sure -- enumerate through your controls looking for text boxes: foreach (Control c in this .Controls) { if (c is TextBox) { TextBox textBox = c as TextBox; if (textBox.Text == string .Empty) { // Text box is empty. // You COULD store information about this textbox is it's tag. } } } You have AND (&&) should be OR (||) if (txtUserID.Text == String.Empty || txtFN.Text == String.Empty || txtMI.Text == String.Empty || txtLN.Text == String.Empty || txtUsername.Text == String.Empty || txtPassword.Text == String.Empty || txtConfirm.Text == String.Empty) { XtraMessageBox.Show( All fields are required!  Warning  MessageBoxButtons.OK MessageBoxIcon.Warning); }