CacheVirtualItemsEventArgs Class
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CacheVirtualItemsEventArgs Class


Provides data for the CacheVirtualItems event.

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


public class CacheVirtualItemsEventArgs : EventArgs

System_CAPS_pubmethodCacheVirtualItemsEventArgs(Int32, Int32)

Initializes a new instance of the CacheVirtualItemsEventArgs class with the specified starting and ending indices.


Gets the ending index for the range of values needed by a ListView control in virtual mode.


Gets the starting index for a range of values needed by a ListView control in virtual mode.


Determines whether the specified object is equal to the current object.(Inherited from Object.)


Allows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection.(Inherited from Object.)


Serves as the default hash function. (Inherited from Object.)


Gets the Type of the current instance.(Inherited from Object.)


Creates a shallow copy of the current Object.(Inherited from Object.)


Returns a string that represents the current object.(Inherited from Object.)

The CacheVirtualItems event occurs when a new area of a ListView in virtual mode is exposed and the ListView determines a new range of items is needed.

Legacy Code Example

The following code example demonstrates the use of this type. In the example, an event handler reports on the occurrence of the CacheVirtualItems event. This report helps you to learn when the event occurs and can assist you in debugging. To report on multiple events or on events that occur frequently, consider replacing Show with Console.WriteLine or appending the message to a multiline TextBox.

To run the example code, paste it into a project that contains an instance of type ListView named ListView1. Then ensure that the event handler is associated with the CacheVirtualItems event.

private void ListView1_CacheVirtualItems(Object sender, CacheVirtualItemsEventArgs e) {

System.Text.StringBuilder messageBoxCS = new System.Text.StringBuilder();
messageBoxCS.AppendFormat("{0} = {1}", "StartIndex", e.StartIndex );
messageBoxCS.AppendFormat("{0} = {1}", "EndIndex", e.EndIndex );
MessageBox.Show(messageBoxCS.ToString(), "CacheVirtualItems Event" );

.NET Framework
Available since 2.0

Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

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