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How to get ALL child controls of a Windows Forms form of a specific type (Button/Textbox)?

Anonymous User 3163 22 Jan 2014

I need to get all controls on a form that are of type x. I'm pretty sure I saw that code once in the past that used something like this:

dim ctrls() as Control

ctrls = Me.Controls(GetType(TextBox))

I know I can iterate over all controls getting children using a recursive function, but is there something easier or more straightforward, maybe like the following?

Dim Ctrls = From ctrl In Me.Controls Where ctrl.GetType Is Textbox

Ask by Anonymous User

Updated 23 Jan 2014

1 Answers

Pravesh Singh 23 Jan 2014

Hi Ashish,

This is an improved version of the recursive GetAllControls() that actually works on private vars:

    private void Test()
    {
        
List<Control> allTextboxes = GetAllControls(this);
    }
    private List<Control> GetAllControls(Control container, List<Control> list)
    {
        foreach(Control c in container.Controls)
        {
            if (c is TextBox) list.Add(c);
            if(c.Controls.Count > 0)
                list =GetAllControls(c, list);
        }
        return list;
    }
    privateList<Control> GetAllControls(Control container)
    {
        return GetAllControls(container, new List<Control>());
    }

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