How do I disable all controls in ASP.NET page?

Question

I have multiple dropdownlist in a page and would like to disable all if user selects a checkbox which reads disable all. So far I have this code and it is not working. Any s

Answer 1

I was working with ASP.Net and HTML controls I did like this

public void DisableForm(ControlCollection ctrls)
    {
        foreach (Control ctrl in ctrls)
        {
            if (ctrl is TextBox)
                ((TextBox)ctrl).Enabled = false;
            if (ctrl is Button)
                ((Button)ctrl).Enabled = false;
            else if (ctrl is DropDownList)
                ((DropDownList)ctrl).Enabled = false;
            else if (ctrl is CheckBox)
                ((CheckBox)ctrl).Enabled = false;
            else if (ctrl is RadioButton)
                ((RadioButton)ctrl).Enabled = false;
            else if (ctrl is HtmlInputButton)
                ((HtmlInputButton)ctrl).Disabled = true;
            else if (ctrl is HtmlInputText)
                ((HtmlInputText)ctrl).Disabled = true;
            else if (ctrl is HtmlSelect)
                ((HtmlSelect)ctrl).Disabled = true;
            else if (ctrl is HtmlInputCheckBox)
                ((HtmlInputCheckBox)ctrl).Disabled = true;
            else if (ctrl is HtmlInputRadioButton)
                ((HtmlInputRadioButton)ctrl).Disabled = true;

            DisableForm(ctrl.Controls);
        }
    }

called like this

DisableForm(Page.Controls);

Answer 2

Here's a VB.NET version which also takes an optional parameter so it can be used for enabling the controls as well.

Private Sub SetControls(ByVal parentControl As Control, Optional ByVal enable As Boolean = False)

    For Each c As Control In parentControl.Controls
        If TypeOf (c) Is CheckBox Then
            CType(c, CheckBox).Enabled = enable
        ElseIf TypeOf (c) Is RadioButtonList Then
            CType(c, RadioButtonList).Enabled = enable
        End If
        SetControls(c)
    Next

End Sub

Answer 3

Put a panel around the part of the page that you want disabled:

   < asp:Panel ID="pnlPage" runat="server" >
      ...
   < /asp:Panel >

Inside of Page_Load:

   If Not Me.Page.IsPostBack Then
      Me.pnlPage.Enabled = False
   End If

... or the C# equivalent. :o)