CODEWITHSUNDEEP
c#.netwinformsforeachcontrols
hbk
hbk

Reputation: 11184

How to contol all elements on form

try to enable or disable some elements on my form (check boxes and textboxes) Read this post , and remake a littlу bit this code

code:

    private void checkBoxEnableHotKeys_CheckedChanged(object sender, EventArgs e)
    {
        if (checkBoxEnableHotKeys.Checked)
        {
            EnableControls(this.Controls, true);
        } //works perfect
        if (!checkBoxEnableHotKeys.Checked)
        {
            EnableControls(this.Controls, false);
        } //disable all controls
    }

    private void EnableControls(Control.ControlCollection controls, bool status)
    {
        foreach (Control c in controls)
        {   
            c.Enabled = status;         
            if (c is MenuStrip)
            {
                c.Enabled = true;
            }
            if (c.Controls.Count > 0)
            {
                EnableControls(c.Controls, status);
            }
        }
        checkBoxEnableHotKeys.Enabled = true; //not work 
    }

where i made mistake? and why checkBoxEnableHotKeys.Enabled = true; not work? (- during debagging this part of code passing with false - and operation = not work - false before and false after ...)

Upvotes: 0

Views: 140

Answers (1)

Derek
Derek

Reputation: 8763

I like the methods that return all child controls of a form - including nested controls.

From: Foreach Control in form, how can I do something to all the TextBoxes in my Form?

I like the answer:

The trick here is that Controls is not a List<> or IEnumerable but a ControlCollection.

I recommend using an extension of Control that will return something more..queriyable ;)

public static IEnumerable<Control> All(this ControlCollection controls)
    {
        foreach (Control control in controls)
        {
            foreach (Control grandChild in control.Controls.All())
                yield return grandChild;

            yield return control;
        }
    }

Then you can do :

foreach(var textbox in this.Controls.All().OfType<TextBox>)
{
    // Apply logic to the textbox here
}

Upvotes: 1

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