Provides data for the ModeChanging event.
System.EventArgs
System.ComponentModel.CancelEventArgs
System.Web.UI.WebControls.DetailsViewModeEventArgs
Namespace: System.Web.UI.WebControls
Assembly: System.Web (in System.Web.dll)
Public Class DetailsViewModeEventArgs _ Inherits CancelEventArgs
public class DetailsViewModeEventArgs : CancelEventArgs
public ref class DetailsViewModeEventArgs : public CancelEventArgs
type DetailsViewModeEventArgs = class inherit CancelEventArgs end
The DetailsViewModeEventArgs type exposes the following members.
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DetailsViewModeEventArgs | Initializes a new instance of the DetailsViewModeEventArgs class. |
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Cancel | Gets or sets a value indicating whether the event should be canceled. (Inherited from CancelEventArgs.) |
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CancelingEdit | Gets a value indicating whether the ModeChanging event was raised as a result of the user canceling an edit operation. |
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NewMode | Gets or sets the mode to which the DetailsView control is changing. |
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Equals(Object) | Determines whether the specified Object is equal to the current Object. (Inherited from Object.) |
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Finalize | Allows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection. (Inherited from Object.) |
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GetHashCode | Serves as a hash function for a particular type. (Inherited from Object.) |
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GetType | Gets the Type of the current instance. (Inherited from Object.) |
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MemberwiseClone | Creates a shallow copy of the current Object. (Inherited from Object.) |
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ToString | 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 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" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <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." Else 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 </script> <html xmlns="http://www.w3.org/1999/xhtml" > <head runat="server"> <title>DetailsViewModeEventArgs Example</title> </head> <body> <form id="form1" runat="server"> <h3>DetailsViewModeEventArgs Example</h3> <asp:detailsview id="CustomerDetailsView" datasourceid="DetailsViewSource" datakeynames="CustomerID" autogeneraterows="true" autogenerateeditbutton="true" allowpaging="true" runat="server"> </asp:detailsview> <br/><br/> <asp:label id="MessageLabel" forecolor="Red" runat="server"/> <!-- 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, [Country]=@Country Where [CustomerID]=@CustomerID" connectionstring= "<%$ ConnectionStrings:NorthWindConnectionString%>" runat="server"/> </form> </body> </html>
<%@ Page language="C#" %> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <script runat="server"> void CustomerDetailsView_ModeChanging(Object sender, DetailsViewModeEventArgs e) { // Use the NewMode property to determine the mode to which the // DetailsView control is transitioning. switch (e.NewMode) { case DetailsViewMode.Edit: // Hide the pager row and clear the Label control // when transitioning to edit mode. CustomerDetailsView.AllowPaging = false; MessageLabel.Text = ""; break; case DetailsViewMode.ReadOnly: // Display the pager row and confirmation message // when transitioning to edit mode. CustomerDetailsView.AllowPaging = true; if (e.CancelingEdit) { MessageLabel.Text = "Update canceled."; } else { MessageLabel.Text = "Update completed."; } break; case DetailsViewMode.Insert: // Cancel the mode change if the DetailsView // control attempts to transition to insert // mode. e.Cancel = true; break; default: MessageLabel.Text = "Unsupported mode."; break; } } </script> <html xmlns="http://www.w3.org/1999/xhtml" > <head runat="server"> <title>DetailsViewModeEventArgs Example</title> </head> <body> <form id="form1" runat="server"> <h3>DetailsViewModeEventArgs Example</h3> <asp:detailsview id="CustomerDetailsView" datasourceid="DetailsViewSource" datakeynames="CustomerID" autogeneraterows="true" autogenerateeditbutton="true" allowpaging="true" onmodechanging="CustomerDetailsView_ModeChanging" runat="server"> </asp:detailsview> <br/><br/> <asp:label id="MessageLabel" forecolor="Red" runat="server"/> <!-- 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, [Country]=@Country Where [CustomerID]=@CustomerID" connectionstring= "<%$ ConnectionStrings:NorthWindConnectionString%>" runat="server"/> </form> </body> </html>
.NET Framework
Supported in: 4, 3.5, 3.0, 2.0Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.