How to clear the text of all textBoxes in the form

Question

private void CleanForm         foreach  var c in this Controls                if  c is TextBox                          TextBox c  Text   String Empty                      This method above doesn t work and the controls aren t cleared  It compiles fine  but does nothing   Any ideas

User · Answer

Try this   var t   this Controls OfType lt TextBox gt    AsEnumerable lt TextBox gt     foreach  TextBox item in t        item Text

User · Answer

private void CleanForm Control ctrl        foreach  var c in ctrl Controls                if  c is TextBox                          TextBox c  Text   String Empty                     if  c Controls Count  gt  0                       CleanForm c                       When you initially call ClearForm  pass in this  or Page  I assume that is what  this  is

User · Answer

We had a problem like this some weeks before  If you set a breakpoint and have a deep look into this Controls  the problem reveals it s nature  you have to recurse through all child controls   The code could look like this   private void CleanForm         traverseControlsAndSetTextEmpty this     private void traverseControlsAndSetTextEmpty Control control         foreach var c in control Controls                if  c is TextBox    TextBox c  Text   String Empty          traverseControlsAndSetTextEmpty c

User · Answer

Maybe you want more simple and short approach  This will clear all TextBoxes too   Except TextBoxes inside Panel or GroupBox     foreach  TextBox textBox in Controls OfType lt TextBox gt         textBox Text

User · Answer

And this for clearing all controls in form like textbox  checkbox  radioButton   you can add different types you want    private void ClearTextBoxes Control control                foreach  Control c in control Controls                        if  c is TextBox                                  TextBox c  Clear                               if  c HasChildren                                ClearTextBoxes c                               if  c is CheckBox                                   CheckBox c  Checked   false                             if  c is RadioButton                                  RadioButton c  Checked   false

User · Answer

I like lambda      private void ClearTextBoxes           Action lt Control ControlCollection gt  func   null        func    controls    gt                          foreach  Control control in controls                   if  control is TextBox                        control as TextBox  Clear                     else                      func control Controls                     func Controls        Good luck

User · Answer

I improved fixed my extension method   public  static class ControlsExtensions       public static void ClearControls this Control frm                foreach  Control control in frm Controls                        if  control is TextBox                                control ResetText                               if  control Controls Count  gt  0                                control ClearControls

User · Answer

Your textboxes are probably inside of panels or other containers  and not directly inside the form   You need to recursively traverse the Controls collection of every child control

User · Answer

You can try this code  protected override bool ProcessCmdKey ref Message msg  Keys keyData                  if keyData  Keys C                        RefreshControl                return true                      return base ProcessCmdKey ref msg  keyData

[c#] How to clear the text of all textBoxes in the form?

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