DetailsViewModeEventArgs Class
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DetailsViewModeEventArgs Class


Provides data for the ModeChanging event.

Namespace:   System.Web.UI.WebControls
Assembly:  System.Web (in System.Web.dll)


Public Class DetailsViewModeEventArgs
	Inherits CancelEventArgs

System_CAPS_pubmethodDetailsViewModeEventArgs(DetailsViewMode, Boolean)

Initializes a new instance of the DetailsViewModeEventArgs class.


Gets or sets a value indicating whether the event should be canceled.(Inherited from CancelEventArgs.)


Gets a value indicating whether the ModeChanging event was raised as a result of the user canceling an edit operation.


Gets or sets the mode to which the DetailsView control is changing.


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 ModeChanging event is raised when a DetailsView control attempts to change between edit, insert, and read-only mode, but before the mode actually changes. This allows you to provide an event handler that performs a custom routine, such as configuring the DetailsView control for a specific mode or canceling the mode change, whenever this event occurs.

A DetailsViewModeEventArgs object is passed to the event handler, which allows you to determine the mode to which the DetailsView control is changing, to determine whether the ModeChanging event was raised as a result of the user canceling an edit operation, or to indicate that an insert operation should be canceled. To determine the new mode, use the NewMode property. You can also use the NewMode property to change to an alternate mode by setting it to one of the DetailsViewMode enumeration values. Use the CancelingEdit property to determine whether the user canceled an edit operation. To cancel an insert operation, set the Cancel property to true.

For more information about handling events, see NIB: Consuming Events.

For a list of initial property values for an instance of the DetailsViewModeEventArgs class, see the DetailsViewModeEventArgs constructor.

The following code example demonstrates how to use the DetailsViewModeEventArgs object passed to the event handler for the ModeChanging event to hide the pager row when the DetailsView control transitions to edit mode.

<%@ Page language="VB" autoeventwireup="false" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
<script runat="server">

  Sub CustomerDetailsView_ModeChanging(ByVal sender As Object, ByVal e As DetailsViewModeEventArgs) Handles CustomerDetailsView.ModeChanging

    ' Use the NewMode property to determine the mode to which the 
    ' DetailsView control is transitioning.
    Select Case e.NewMode

      Case DetailsViewMode.Edit
        ' Hide the pager row and clear the Label control
        ' when transitioning to edit mode.
        CustomerDetailsView.AllowPaging = False
        MessageLabel.Text = ""

      Case DetailsViewMode.ReadOnly
        ' Display the pager row and confirmation message
        ' when transitioning to edit mode.
        CustomerDetailsView.AllowPaging = True
        If e.CancelingEdit Then

          MessageLabel.Text = "Update canceled."


          MessageLabel.Text = "Update completed."

        End If

      Case DetailsViewMode.Insert
        ' Cancel the mode change if the DetailsView
        ' control attempts to transition to insert 
        ' mode.
        e.Cancel = True

      Case Else
        MessageLabel.Text = "Unsupported mode."

    End Select

  End Sub


<html xmlns="" >
  <head runat="server">
    <title>DetailsViewModeEventArgs Example</title>
    <form id="form1" runat="server">

      <h3>DetailsViewModeEventArgs Example</h3>

      <asp:detailsview id="CustomerDetailsView"



      <asp:label id="MessageLabel"

      <!-- This example uses Microsoft SQL Server and connects  -->
      <!-- to the Northwind sample database. Use an ASP.NET     -->
      <!-- expression to retrieve the connection string value   -->
      <!-- from the web.config file.                            -->
      <asp:sqldatasource id="DetailsViewSource"
        selectcommand="Select [CustomerID], [CompanyName], [Address], 
          [City], [PostalCode], [Country] From [Customers]"
        updatecommand="Update [Customers] Set 
          [CompanyName]=@CompanyName, [Address]=@Address, 
          [City]=@City, [PostalCode]=@PostalCode, 
          Where [CustomerID]=@CustomerID" 
          "<%$ ConnectionStrings:NorthWindConnectionString%>" 


.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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