DomainUpDown.DomainUpDownItemCollection.Add Method (Object)

 

Adds the specified object to the end of the collection.

Namespace:   System.Windows.Forms
Assembly:  System.Windows.Forms (in System.Windows.Forms.dll)

public override int Add(
	object item
)

Parameters

item
Type: System.Object

The Object to be added to the end of the collection.

Return Value

Type: System.Int32

The zero-based index value of the Object added to the collection.

You can also add a new Object to the collection by using the Insert method.

To remove an Object that you have previously added, use the Remove or RemoveAt methods.

The following example creates and initializes a DomainUpDown control. The example allows you to set some of its properties and create a collection of strings for display in the up-down control. The code assumes that a TextBox, CheckBox and a Button have been instantiated on a form. The example also assumes that you have a member variable at the class level declared as a 32-bit signed integer named myCounter. You can enter a string in the text box and add it to the Items collection when the button is clicked. By clicking the check box, you can toggle the Sorted property and observe the difference in the collection of items in the up-down control.

protected DomainUpDown domainUpDown1;

private void InitializeMyDomainUpDown()
 {
    // Create and initialize the DomainUpDown control.
    domainUpDown1 = new DomainUpDown();

    // Add the DomainUpDown control to the form.
    Controls.Add(domainUpDown1);
 }

 private void button1_Click(Object sender, 
                           EventArgs e)
 {   
    // Add the text box contents and initial location in the collection
    // to the DomainUpDown control.
    domainUpDown1.Items.Add((textBox1.Text.Trim()) + " - " + myCounter);

    // Increment the counter variable.
    myCounter = myCounter + 1;

    // Clear the TextBox.
    textBox1.Text = "";
 }

 private void checkBox1_Click(Object sender, 
                             EventArgs e)
 {
    // If Sorted is set to true, set it to false; 
    // otherwise set it to true.
    if (domainUpDown1.Sorted)
    {
       domainUpDown1.Sorted = false;
    }
    else
    {
       domainUpDown1.Sorted = true;
    }
 }

 private void domainUpDown1_SelectedItemChanged(Object sender, 
                                               EventArgs e)
 {
    // Display the SelectedIndex and 
    // SelectedItem property values in a MessageBox.
    MessageBox.Show("SelectedIndex: " + domainUpDown1.SelectedIndex.ToString() 
       + "\n" + "SelectedItem: " + domainUpDown1.SelectedItem.ToString());
 }

.NET Framework
Available since 1.1
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