Limpa os controles do formulário

public void apagarControles(System.Web.UI.HtmlControls.HtmlForm form)
{
for (int i = 0; i <= form.Controls.Count - 1; i++)
{
if (form.Controls[i] is System.Web.UI.WebControls.TextBox)
{
(form.Controls[i] as System.Web.UI.WebControls.TextBox).Text = "";
}

if (form.Controls[i] is DropDownList)
{
(form.Controls[i] as DropDownList).SelectedIndex = -1;
}

if (form.Controls[i] is RadioButtonList)
{
(form.Controls[i] as RadioButtonList).SelectedIndex = -1;
}

if (form.Controls[i] is CheckBoxList)
{
(form.Controls[i] as CheckBoxList).SelectedIndex = -1;
}

if (form.Controls[i] is System.Web.UI.WebControls.Label)
{
(form.Controls[i] as System.Web.UI.WebControls.Label).Text = null;
}
}
}

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