DomainUpDown

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Exam Prep. Guides

70-505 Study Guide 70-526 Study Guide

1. Forms Controls Add/configure a Form Manage control layout Add/configure a control Use IDE Add controls Configure controls Modify Control Properties Configure controls Create/configure command controls Create/configure text edit controls Create/configure text display controls LinkLabel Control Create List Controls Configure Layout and Functionality Value-setting controls WebBrowser control Date-setting controls Display images NotifyIcon Access keys Create/configure menus Create event handlers 2. Integrating Data 3. Printing/Reporting 4. Enhancing Usability 5. Asynchronous Prog. 6. Forms Controls 7. Configure/Deploy

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Exam 70-526 Preparation Guide: Configure the layout and functionality of a Windows Form to display a list of items

Contents 1 Inheritance hierarchy 2 Useful properties 3 String Collection Editor 4 Adding a DomainUpDown manually 5 SelectedItemChanged Event 6 MSDN references

The DomainUpDown control is similar to the NumericUpDown control, with the difference being that the DomainUpDown displays a list of strings and the NumericUpDown control displays a list of numbers.

Inheritance hierarchy

System.Object
  System.MarshalByRefObject
    System.ComponentModel.Component
      System.Windows.Forms.Control
        System.Windows.Forms.ScrollableControl
          System.Windows.Forms.ContainerControl
            System.Windows.Forms.UpDownBase
              System.Windows.Forms.DomainUpDown

Useful properties

• Items - The collections of strings that can be displayed and chosen from.

• ReadOnly - Indicates whether the text can be changed by the use of the up or down buttons only.

• SelectedIndex - Indicates the index value of the selected item.

• SelectedItem - Indicates the selected item based on the index value of the selected item in the collection.

• Sorted - Indicates whether the item collection is sorted.

• Text - The text that is displayed in the DomainUpDown.

• Wrap - Indicates whether the collection of items continues to the first or last item if the user continues past the end of the list.

String Collection Editor

The Items can be edited using the String Collection Editor, which can be accessed by clicking on the button in the right hand column of the Items property in the Properties Window.

Adding a DomainUpDown manually

Consider adding a DomainUpDown that allows items of food to be selected. The code to do this would be similar in nature to this example:

public void AddDomainUpDown()
{
  DomainUpDown domUpDn = new DomainUpDown();
  domUpDn.Location = new Point(50, 50);
  domUpDn.Size = new Size(100, 25);
 
  domUpDn.Items.Add("Spaghetti");
  domUpDn.Items.Add("Corn");
  domUpDn.Items.Add("Potatoes");
  domUpDn.Items.Add("Tomatoes");
 
  domUpDn.SelectedItem = "Corn";
 
  Controls.Add(domUpDn);
}

SelectedItemChanged Event

The crucial event behind the DomainUpDowncontrol is the SelectedItemChanged event.

For the SelectedItemChanged event to occur, the SelectedItem property can be changed in code, by the user typing in a new value or clicking the control's up or down buttons.

MSDN references

• DomainUpDown Class