DataRepeaterItemValueEventArgs Class

Provides data for the ItemValueNeeded and ItemValuePushed events.

Inheritance Hierarchy

System.Object
  System.EventArgs
    Microsoft.VisualBasic.PowerPacks.DataRepeaterItemValueEventArgs

Namespace:  Microsoft.VisualBasic.PowerPacks
Assembly:  Microsoft.VisualBasic.PowerPacks.Vs (in Microsoft.VisualBasic.PowerPacks.Vs.dll)

Syntax

'Declaration
Public Class DataRepeaterItemValueEventArgs _
    Inherits EventArgs
public class DataRepeaterItemValueEventArgs : EventArgs
public ref class DataRepeaterItemValueEventArgs : public EventArgs
type DataRepeaterItemValueEventArgs =  
    class 
        inherit EventArgs 
    end
public class DataRepeaterItemValueEventArgs extends EventArgs

The DataRepeaterItemValueEventArgs type exposes the following members.

Constructors

  Name Description
Public method DataRepeaterItemValueEventArgs Initializes a new instance of the DataRepeaterItemValueEventArgs class.

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Properties

  Name Description
Public property Control Gets the child control of a DataRepeaterItem that is raising the ItemValueNeeded or ItemValuePushed event.
Public property ItemIndex Gets the index of the DataRepeaterItem that contains the control that is raising the ItemValueNeeded or ItemValuePushed event.
Public property PropertyName Gets the name of the data-bound property of the control that is raising a ItemValueNeeded or ItemValuePushed event.
Public property Value Gets the property value that has changed to raise a ItemValueNeeded or ItemValuePushed event.

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Methods

  Name Description
Public method Equals Determines whether the specified object is equal to the current object. (Inherited from Object.)
Protected method Finalize Allows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection. (Inherited from Object.)
Public method GetHashCode Serves as the default hash function. (Inherited from Object.)
Public method GetType Gets the Type of the current instance. (Inherited from Object.)
Protected method MemberwiseClone Creates a shallow copy of the current Object. (Inherited from Object.)
Public method ToString Returns a string that represents the current object. (Inherited from Object.)

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Remarks

In virtual mode, use the ItemValueNeeded event to populate the child controls of the ItemTemplate with values from your data store when a DataRepeaterItem is displayed or when a new item is added.

Use the ItemValuePushed event to save changes to the child control values to your data store.

When the VirtualMode property is set to False, these events are not raised.

Examples

The following example demonstrates how to handle the ItemValueNeeded event. It assumes that you have a DataRepeater control named DataRepeater1 that has its VirtualMode property set to True. The code will resemble the following example, which is for a data source named Employees.

Private Sub DataRepeater1_ItemValueNeeded(
    ByVal sender As Object, 
    ByVal e As Microsoft.VisualBasic.PowerPacks.DataRepeaterItemValueEventArgs
  ) Handles DataRepeater1.ItemValueNeeded
    If e.ItemIndex < Employees.Count Then 
        Select Case e.Control.Name
            Case "txtFirstName"
                e.Value = Employees.Item(e.ItemIndex + 1).firstName
            Case "txtLastName"
                e.Value = Employees.Item(e.ItemIndex + 1).lastName
        End Select 
    End If 
End Sub
private void dataRepeater1_ItemValueNeeded(object sender, Microsoft.VisualBasic.PowerPacks.DataRepeaterItemValueEventArgs e)
{
    if (e.ItemIndex < Employees.Count)
    {
        switch (e.Control.Name)
        {
            case "txtFirstName":
                e.Value = Employees[e.ItemIndex + 1].firstName;
                break;
            case "txtLastName":
                e.Value = Employees[e.ItemIndex + 1].lastName;
                break;
        }
    }
}

Thread Safety

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

See Also

Reference

Microsoft.VisualBasic.PowerPacks Namespace

ItemValuePushed

ItemValueNeeded

Other Resources

Introduction to the DataRepeater Control (Visual Studio)

Virtual Mode in the DataRepeater Control (Visual Studio)