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

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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

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夕颜

2020-12-14 08:49

Each control has child controls, so you'd need to use recursion to reach them all:

protected void DisableControls(Control parent, bool State) {
    foreach(Control c in parent.Controls) {
        if (c is DropDownList) {
            ((DropDownList)(c)).Enabled = State;
        }

        DisableControls(c, State);
    }
}

Then call it like so:

protected void Event_Name(...) {
    DisableControls(Page,false); // use whatever top-most control has all the dropdowns or just the page control
} // divs, tables etc. can be called through adding runat="server" property

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逝去的感伤

2020-12-14 08:51

  private void ControlStateSwitch(bool state)
{
    foreach (var x in from Control c in Page.Controls from Control x in c.Controls select x)
        if (ctrl is ASPxTextBox)

            ((ASPxTextBox)x).Enabled = status;

        else if (x is ASPxDateEdit)

            ((ASPxDateEdit)x).Enabled = status;
}

I use a linq aproach. While using devExpress you must include DevExpress.Web.ASPxEditors lib.

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情书的邮戳

2020-12-14 08:56

I know this is an old post but this is how I have just solved this problem. AS per the title "How do I disable all controls in ASP.NET page?" I used Reflection to achieve this; it will work on all control types which have an Enabled property. Simply call DisableControls passing in the parent control (I.e., Form).

C#:

private void DisableControls(System.Web.UI.Control control)
{
    foreach (System.Web.UI.Control c in control.Controls) 
    {
        // Get the Enabled property by reflection.
        Type type = c.GetType();
        PropertyInfo prop = type.GetProperty("Enabled");

        // Set it to False to disable the control.
        if (prop != null) 
        {
            prop.SetValue(c, false, null);
        }

        // Recurse into child controls.
        if (c.Controls.Count > 0) 
        {
            this.DisableControls(c);
        }
    }
}

VB:

    Private Sub DisableControls(control As System.Web.UI.Control)

        For Each c As System.Web.UI.Control In control.Controls

            ' Get the Enabled property by reflection.
            Dim type As Type = c.GetType
            Dim prop As PropertyInfo = type.GetProperty("Enabled")

            ' Set it to False to disable the control.
            If Not prop Is Nothing Then
                prop.SetValue(c, False, Nothing)
            End If

            ' Recurse into child controls.
            If c.Controls.Count > 0 Then
                Me.DisableControls(c)
            End If

        Next

    End Sub

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野的像风

2020-12-14 08:56

You have to do this recursive, I mean you have to disable child controls of controls to :

protected void Page_Load(object sender, EventArgs e)
{
  DisableChilds(this.Page);
}

private void DisableChilds(Control ctrl)
{
   foreach (Control c in ctrl.Controls)
   {
      DisableChilds(c);
      if (c is DropDownList)
      {
           ((DropDownList)(c)).Enabled = false;
      }
    }
}

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悲&欢浪女

2020-12-14 08:58
If you really want to disable all controls on a page, then the easiest way to do this is to set the form's Disabled property to true.

ASPX:
```
<body>
    <form id="form1" runat="server">
      ...
    </form>
</body>
```
Code-behind:
```
protected void Page_Load(object sender, EventArgs e)
{
    form1.Disabled = true;
}
```
But of course, this will also disable your checkbox, so you won't be able to click the checkbox to re-enable the controls.
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無奈伤痛

2020-12-14 09:04

It would be easiest if you put all the controls you want to disable in a panel and then just enable/disable the panel.

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