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Clear a form

This is a snippet I use to clear a form. Right now it clears: TextBox, RichTextBox, ComboBox, CheckBox and RadioButton. More can be added if needed

Submitted By: PsychoCoder

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Rating:

Views: 9,090

Language: C#

Last Modified: September 6, 2007

Instructions: Call the method like so: ClearForm(this);

Snippet

public static void ClearForm(System.Windows.Forms.Control parent)
{
foreach (System.Windows.Forms.Control ctrControl in parent.Controls)
{
//Loop through all controls
if (object.ReferenceEquals(ctrControl.GetType(), typeof(System.Windows.Forms.TextBox)))
{
//Check to see if it's a textbox
((System.Windows.Forms.TextBox)ctrControl).Text = string.Empty;
//If it is then set the text to String.Empty (empty textbox)
}
else if (object.ReferenceEquals(ctrControl.GetType(), typeof(System.Windows.Forms.RichTextBox)))
{
//If its a RichTextBox clear the text
((System.Windows.Forms.RichTextBox)ctrControl).Text = string.Empty;
}
else if (object.ReferenceEquals(ctrControl.GetType(), typeof(System.Windows.Forms.ComboBox)))
{
//Next check if it's a dropdown list
((System.Windows.Forms.ComboBox)ctrControl).SelectedIndex = -1;
//If it is then set its SelectedIndex to 0
}
else if (object.ReferenceEquals(ctrControl.GetType(), typeof(System.Windows.Forms.CheckBox)))
{
//Next uncheck all checkboxes
((System.Windows.Forms.CheckBox)ctrControl).Checked = false;
}
else if (object.ReferenceEquals(ctrControl.GetType(), typeof(System.Windows.Forms.RadioButton)))
{
//Unselect all RadioButtons
((System.Windows.Forms.RadioButton)ctrControl).Checked = false;
}
if (ctrControl.Controls.Count > 0)
{
//Call itself to get all other controls in other containers
ClearForm(ctrControl);
}
}
}
//Example call
ClearForm(this);

Copy & Paste

public static void ClearForm(System.Windows.Forms.Control parent)
{
    foreach (System.Windows.Forms.Control ctrControl in parent.Controls)
    {
         //Loop through all controls 
         if (object.ReferenceEquals(ctrControl.GetType(), typeof(System.Windows.Forms.TextBox)))
         {
              //Check to see if it's a textbox 
              ((System.Windows.Forms.TextBox)ctrControl).Text = string.Empty;
                    //If it is then set the text to String.Empty (empty textbox) 
          }
          else if (object.ReferenceEquals(ctrControl.GetType(), typeof(System.Windows.Forms.RichTextBox)))
          {
               //If its a RichTextBox clear the text
               ((System.Windows.Forms.RichTextBox)ctrControl).Text = string.Empty;
          }
          else if (object.ReferenceEquals(ctrControl.GetType(), typeof(System.Windows.Forms.ComboBox)))
          {
               //Next check if it's a dropdown list 
               ((System.Windows.Forms.ComboBox)ctrControl).SelectedIndex = -1;
                    //If it is then set its SelectedIndex to 0 
          }
          else if (object.ReferenceEquals(ctrControl.GetType(), typeof(System.Windows.Forms.CheckBox)))
          {
               //Next uncheck all checkboxes
               ((System.Windows.Forms.CheckBox)ctrControl).Checked = false;
          }
          else if (object.ReferenceEquals(ctrControl.GetType(), typeof(System.Windows.Forms.RadioButton)))
          {
               //Unselect all RadioButtons
               ((System.Windows.Forms.RadioButton)ctrControl).Checked = false;
          }
          if (ctrControl.Controls.Count > 0)
          {
              //Call itself to get all other controls in other containers 
              ClearForm(ctrControl);
          }
     }
}

//Example call
ClearForm(this);