How to clear all form fields from code-behind?

Question

HTML has an input button type to reset all fields in a form to their initial state in one step: .

Is there a similar

Answer 1

You need only write a fork for each type of control unless one of the control has something special that needs to be done to reset it.

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

    var dropDownList = control as DropDownList;
    if (dropDownList != null)
        dropDownList.SelectedIndex = 0;
    ...
}

ADDITION You asked how to clear controls even ones that are buried. To do that, you should create a recursive routine like so:

private void ClearControl( Control control )
{
    var textbox = control as TextBox;
    if (textbox != null)
        textbox.Text = string.Empty;

    var dropDownList = control as DropDownList;
    if (dropDownList != null)
        dropDownList.SelectedIndex = 0;
    ...

    foreach( Control childControl in control.Controls )
    {
        ClearControl( childControl );
    }
}

So, you would call this by passing the page:

ClearControls( this );