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.NET and JavaScript UI Controls
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MaxDropDownItems Property

Gets/sets the maximum number of items that will be displayed in the visible portion of the dropdown.
Syntax
'Declaration
 
Public Property MaxDropDownItems As Integer
public int MaxDropDownItems {get; set;}
Remarks

When the total number of items in the list exceeds the value specified by the MaxDropDownItems property, a scrollbar is displayed.

Note: The number of items that are displayed in the visible portion of the dropdown list includes items in the MRUList.

Note:

Each item displayed in the list portion has its own Infragistics.Win.AppearanceBase object; as such, each item can have a different height, based on the size of the font the item uses. When this is the case, the MaxDropDownItems property will not function as expected. To avoid this scenario, it is recommended that all items in the list use the same font size.
Example
This sample initializes the items collection of an UltraComboEditor. It then initializes some of the display and behavior properties such as MRU, Item and individual item appearances, autocomplete.

Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load

    'Add 8 items to the combo
    Me.UltraComboEditor1.Items.Add(1, "One")
    Me.UltraComboEditor1.Items.Add(2, "Two")
    Me.UltraComboEditor1.Items.Add(3, "Three")
    Me.UltraComboEditor1.Items.Add(4, "Four")
    Me.UltraComboEditor1.Items.Add(5, "Five")
    Me.UltraComboEditor1.Items.Add(6, "Six")
    Me.UltraComboEditor1.Items.Add(7, "Seven")
    Me.UltraComboEditor1.Items.Add(8, "Eight")

    ' This combo should always be in edit mode, 
    Me.UltraComboEditor1.AlwaysInEditMode = True

    ' Turn on auto-complete for Internet Explorer type auto completion
    Me.UltraComboEditor1.AutoComplete = True

    ' Office XP look and feel.
    Me.UltraComboEditor1.DisplayStyle = Infragistics.Win.EmbeddableElementDisplayStyle.OfficeXP

    ' Assign a shared image and forecolor to each element.
    Me.UltraComboEditor1.ItemAppearance.Image = Me.Icon.ToBitmap()
    Me.UltraComboEditor1.ImageTransparentColor = Color.FromArgb(192, 192, 192)
    Me.UltraComboEditor1.ItemAppearance.ForeColor = Color.White

    ' Assign individual backColors to each element

    Dim baseColorIndex As Integer = 255 / Me.UltraComboEditor1.Items.Count
    Dim i As Integer

    For i = 0 To Me.UltraComboEditor1.Items.Count - 1
        Me.UltraComboEditor1.Items(i).Appearance.BackColor = Color.FromArgb(100, 100, baseColorIndex + (baseColorIndex * i))
    Next i


    Me.UltraComboEditor1.MaxDropDownItems = 6
    Me.UltraComboEditor1.HasMRUList = True
    Me.UltraComboEditor1.SelectedIndex = 3
    Me.UltraComboEditor1.SortStyle = Infragistics.Win.ValueListSortStyle.DescendingByValue

End Sub
private void Form1_Load(object sender, System.EventArgs e)
{

	// Add 8 items to the combo
	this.ultraComboEditor1.Items.Add(1,"One");
	this.ultraComboEditor1.Items.Add(2,"Two");
	this.ultraComboEditor1.Items.Add(3,"Three");
	this.ultraComboEditor1.Items.Add(4,"Four");
	this.ultraComboEditor1.Items.Add(5,"Five");
	this.ultraComboEditor1.Items.Add(6,"Six");
	this.ultraComboEditor1.Items.Add(7,"Seven");
	this.ultraComboEditor1.Items.Add(8,"Eight");

	// This combo should always be in edit mode, 
	this.ultraComboEditor1.AlwaysInEditMode = true;

	// Turn on auto-complete for Internet Explorer type auto completion
	this.ultraComboEditor1.AutoComplete = true;

	// Office XP look and feel.
	this.ultraComboEditor1.DisplayStyle = Infragistics.Win.EmbeddableElementDisplayStyle.OfficeXP;

	// Assign a shared image and forecolor to each element.
	this.ultraComboEditor1.ItemAppearance.Image = this.Icon.ToBitmap();
	this.ultraComboEditor1.ImageTransparentColor = Color.FromArgb(192,192,192);
	this.ultraComboEditor1.ItemAppearance.ForeColor = Color.White;

	// Assign individual backColors to each element
	int baseColorIndex = 255 / this.ultraComboEditor1.Items.Count;

	for(int i = 0; i < this.ultraComboEditor1.Items.Count; i++)
	{
		this.ultraComboEditor1.Items[i].Appearance.BackColor = Color.FromArgb(100,100,baseColorIndex  + (baseColorIndex * i));
	}


	this.ultraComboEditor1.MaxDropDownItems = 6;
	this.ultraComboEditor1.HasMRUList = true;
	this.ultraComboEditor1.SelectedIndex = 3;
	this.ultraComboEditor1.SortStyle = Infragistics.Win.ValueListSortStyle.DescendingByValue;

}
Requirements

Target Platforms: Windows 10, Windows 8.1, Windows 8, Windows 7, Windows Server 2012, Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

See Also