Clear all fields after submit

Question

I have many text box in an asp.net application, and after submitting their values i want to clear all fields when it loads again?

score 15 · Accepted Answer · edited Dec 15 '16 at 20:32

15

you need to write and call similar function after submit

   public static void EmptyTextBoxes(Control parent) 
   { 
      foreach (Control c in parent.Controls) { 
        if (c.GetType() == typeof(TextBox))
        { 
           ((TextBox)(c)).Text = string.Empty;            
        }  
      }
   }

reference

http://www.tek-tips.com/faqs.cfm?fid=6470

edited Dec 15 '16 at 20:32

HelloIT

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answered Mar 01 '10 at 12:27

Asad

20,544
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score 5 · Answer 2 · answered Jul 10 '11 at 16:54

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;
            }
        }
    }

score 0 · Answer 3 · answered Mar 01 '10 at 12:24

0

You may use JavaScript form reset() method or loop throw all textboxes and set Text property to empty string.

foreach(var control in this.Controls){
   TextBox tb = control as TextBox;
   if (tb != null)
   {
      tb.Text = string.Empty;
   }
}

answered Mar 01 '10 at 12:24

sashaeve

8,993
10
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60

score 0 · Answer 4 · answered Mar 01 '10 at 12:27

You could do this in the page:

foreach (var tb in Controls.OfType<TextBox>())
{
  tb.Text = null;
}

If you need to clear a whole hierarchy of them, call this once from the page: ClearTextBoxes(this);

And here's the function:

private void ClearTextBoxes(Control c) {
  foreach (var tb in c.Controls.OfType<TextBox>())
  {
    tb.Text = null;
  }
  foreach (var control in c.Controls) {
    ClearTextBoxes(control); //Recurse down to children
  }
}

score 0 · Answer 5 · answered Mar 01 '10 at 12:28

public static Control[] FlattenHierachy(Control root)
{
    List<Control> list = new List<Control>();
    list.Add(root);
    if (root.HasControls())
    {
        foreach (Control control in root.Controls)
        {
            list.AddRange(FlattenHierachy(control));
        }
    }
    return list.ToArray();
}

private void ClearTextBoxes()
{
    Control[] allControls = FlattenHierachy(Page);
    foreach (Control control in allControls)
    {
        TextBox textBox = control as TextBox;
        if (textBox != null)
        {
            textBox.Text = "";
        }
    }
}

This code will collect all textboxes in a list and set their textproperty to "".

score 0 · Answer 6 · answered Mar 01 '10 at 12:36

Well You can as well set the field to not use viewstate, which will imply in a boost in performance, small , but a boost nonetheless. As well, you could do a response.redirect to the same page, or a server.transfer.
If those two solutions doesn't suit you, you might use something of a textbox.text = string.empty, and dropdowlist.clearselection. They might be not as fast as you might want they are a lot more elegant.

score 0 · Answer 7 · answered Mar 01 '10 at 12:40

0

COMPLETELY UNTESTED SOLUTION:

Can't you use ME.ViewState.Clear() in the Init or LoadViewState event handlers?

Or it might be Page.Viewstate.Clear() or even Page.ClearChildViewState()...

Sorry - haven't tried it in anger....

answered Mar 01 '10 at 12:40

CJM

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just write this line will reset all fields. this.form1.ID= "newid"; – Adeel Mar 01 '10 at 12:47
Could be useful, except where the form ID is referenced (though for obvious reasons, in ASP.NET this tends not to be the case) – CJM Mar 01 '10 at 14:14

score 0 · Answer 8 · answered Feb 17 '17 at 17:42

This is an old question, but I just wanted to add the following, in case the controls are in a group box, you can do it like this, then :

        foreach (Control c in this.form.Controls)
        {
            //Tests each control to see if it is a GroupBox
            if (c is GroupBox)
            {
                clearRadioButtons(c.Controls);
                clearListBox(c.Controls);
                resetDateTime(c.Controls);
                clearTextBoxes(c.Controls);
                clearComboBoxes(c.Controls);
            }
        }    
    public static void clearTextBoxes(Control.ControlCollection controls)
    {
        //Loops through all controls on form
        foreach (Control c in controls)
        {
            //Tests each control to see if it is a textbox
            if (c is TextBox)
            {
                //Converts to useable format and clears textboxes
                var text = (TextBox)c;
                text.Clear();
            }
        }
    }

score -1 · Answer 9 · edited Jun 16 '13 at 12:43

-1

Create a function called cleardata():

void cleardata()
{
    textbox1.Clear();
    textbox2.Clear();
    textbox3.Clear();
    textbox4.Clear();
}

And call this function whenever you need it.

edited Jun 16 '13 at 12:43

Danilo Valente

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answered Jun 16 '13 at 12:25

Shrenik

1
1

Clear all fields after submit

9 Answers9