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c#winformshierarchical

How can I access to a text box which is in a group box?

I designed a windows form which has textbox1 placed on the Form directly and textbox2 on the goupbox1. Running below code only changes text of textbox1. I googled a lot but I could not find the solution. How can i reach textbox2?

public Form1()
{
    InitializeComponent();
    foreach (TextBox txtBox in this.Controls.OfType<TextBox>())
    {
        txtBox.Enter += textBox_Enter;
        txtBox.Text = "123"; //To test if the text box is recognized or not
    }
}
Solution

  • You can use recursion.
    I'd recommend you to use the following extension method:

    public static IEnumerable<T> GetAllControls<T>(Control control)
{
    var controls = control.Controls.OfType<T>();
    return control.Controls.Cast<Control>()
        .Aggregate(controls, (current, c) => current.Concat(GetAllControls<T>(c)));
}

    Usage:

    var textBoxes = GetAllControls<TextBox>(this);