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How to: Access Keyed Collections in Windows Forms

The key associated with an item in a collection is typically the name of the item. The following procedures show you how to use collection classes to perform common tasks.

To find and give focus to a nested control in a control collection

  • Use the Find and Focus methods to specify the name of the control to find and give focus to.

    OrderForm OrderForm1 = new OrderForm();
    OrderForm1.Controls.Find("textBox1", true)[0].Focus();

To access an image in an image collection

  • Use the Item property to specify the name of the image you want to access.

    this.BackgroundImage = imageList1.Images["logo.gif"];

To set a tab page as the selected tab

  • Use the SelectedTab property together with the Item property to specify the name of the tab page to set as the selected tab.

    tabControl1.SelectedTab = tabControl1.TabPages["shippingOptions"];