CODEWITHSUNDEEP
c#winformsfor-loop
Francesco Zappalà
Francesco Zappalà

Reputation: 63

For Loop increasing textBox ID. C# Windows Form

I have 100 textBoxes, I want to set a value to all of them using a for loop.

for(int i=0; i<100; i++)
{
    textBox1.AppendText("a");
}

but the textBox ID has to change dynamically like textBox1,textBox2,textBox3 etc...

How can I do this?

Upvotes: 2

Views: 461

Answers (2)

Michał Turczyn
Michał Turczyn

Reputation: 37337

Try this code:

for (int i = 1; i <= numberOfTextBoxes; i++)
{
    var tb = this.Controls.Find("textBox" + i, true).FirstOrDefault();
    if(tb != null)
      tb.Text = "hello " + i;
}

More on Find method.

Upvotes: 1

kkica
kkica

Reputation: 4104

Put all the TextBoxes in a list.

Or put them in a control and then query them. Call this method with typeof TextBox.

public IEnumerable<Control> GetAll(Control control,Type type)
{
    var controls = control.Controls.Cast<Control>();

    return controls.SelectMany(ctrl => GetAll(ctrl,type))
                              .Concat(controls)
                              .Where(c => c.GetType() == type);
}

EDIT: As mentioned in the comments, you can also pas the Form to this method. Or query the controls directy from the form.

Upvotes: 0

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