Passing value from MDI Parent to MDI Child

The first thing you need is a reference to the child form.

You can either save a reference to the child form in a field of the parent form, when you create the child, or you can get it from the parent's MdiChildren property.

If there's only one child, the latter is the easiest way.

The control or controls in which you want to display the data on the child form also need their Modifiers property changed from private to internal so that they are directly accessible from other forms in the application.

For example, suppose there's only one child form whose class name is Form2 and which has a textbox ( textBox1) in which you want to display some data already displayed in a label (label1) on the parent form. The following code should do it:

Form2 f2 = (Form2)this.MdiChildren[0];
f2.textBox1.Text = this.label1.Text;

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Vulpes13y ago
The first thing you need is a reference to the child form.

You can either save a reference to the child form in a field of the parent form, when you create the child, or you can get it from the parent's MdiChildren property.

If there's only one child, the latter is the easiest way.

The control or controls in which you want to display the data on the child form also need their Modifiers property changed from private to internal so that they are directly accessible from other forms in the application.

For example, suppose there's only one child form whose class name is Form2 and which has a textbox ( textBox1) in which you want to display some data already displayed in a label (label1) on the parent form. The following code should do it:

Form2 f2 = (Form2)this.MdiChildren[0];
f2.textBox1.Text = this.label1.Text;