Call Datas from other Form

If the data is within some control (say a textbox), then the easiest way to do it is to first change the Modifiers property of the control from private to internal so it's directly accessible by other classes or forms within the same project.

You then need to get a reference to the form it's on. There are many ways to do this but one which always works is to use the Application.OpenForms property. For example, if you wanted to access textBox1 which was on Form1 (Name property also "Form1") you could do this:

  Form1 f1 = (Form1)Application.OpenForms["Form1"];
  string text = f1.textBox1.Text;

If the data is not within a control, then you need to place a public (or internal) property or method on the form to access it. For example:

  // on Form1

  internal string GetText()
  {
     return "something";
  }

  // on some other form

  Form1 f1 = (Form1)Application.OpenForms["Form1"];
  string text = f1.GetText();