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GridViewUpdatedEventHandler Delegate

Represents the method that handles the RowUpdated event of a GridView control.

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

public delegate void GridViewUpdatedEventHandler(
	Object sender,
	GridViewUpdatedEventArgs e
)

Parameters

sender
Type: System.Object

The source of the event.

e
Type: System.Web.UI.WebControls.GridViewUpdatedEventArgs

A GridViewUpdatedEventArgs that contains the event data.

The GridView control raises the RowUpdated event when an Update button (a button with its CommandName property set to "Update") within the control is clicked, but after the GridView control updates the record. This allows you to provide an event-handling method that performs a custom routine, such as checking the results of an update operation, whenever this event occurs.

When you create a GridViewUpdatedEventHandler delegate, you identify the method that will handle the event. To associate the event with your event handler, add an instance of the delegate to the event. The event handler is called whenever the event occurs, unless you remove the delegate. For more information about event-handler delegates, see Events and Delegates.

The following example demonstrates how to programmatically add a GridViewUpdatedEventHandler delegate to the RowUpdated event of a GridView control.


<%@ 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 Page_Load(Object sender, EventArgs e)
  {

    // Create a new GridView control.
    GridView customersGridView = new GridView();

    // Set the GridView control's properties.
    customersGridView.ID = "CustomersGridView";
    customersGridView.DataSourceID = "CustomersSqlDataSource";
    customersGridView.AutoGenerateColumns = true;
    customersGridView.AutoGenerateEditButton = true;
    customersGridView.AllowPaging = true;
    customersGridView.DataKeyNames = new String[1] { "CustomerID" };

    // Programmatically register the event-handling method
    // for the RowDeleted event of the GridView control.
    customersGridView.RowUpdated += new GridViewUpdatedEventHandler(this.CustomersGridView_RowUpdated);
    customersGridView.RowCancelingEdit += new GridViewCancelEditEventHandler(this.CustomersGridView_RowCancelingEdit);
    customersGridView.RowEditing += new GridViewEditEventHandler(this.CustomersGridView_RowEditing);

    // Add the GridView control to the Controls collection
    // of the PlaceHolder control.
    GridViewPlaceHolder.Controls.Add(customersGridView);

  }

  void CustomersGridView_RowUpdated(Object sender, GridViewUpdatedEventArgs e)
  {

    // Indicate whether the update operation succeeded.
    if(e.Exception == null)
    {
      Message.Text = "Row updated successfully.";
    }
    else
    {
      e.ExceptionHandled = true;
      Message.Text = "An error occurred while attempting to update the row.";
    }

  }

  void CustomersGridView_RowCancelingEdit(Object sender, GridViewCancelEditEventArgs e)
  {

    // The update operation was canceled. Clear the message label.
    Message.Text = "";

  }

  void CustomersGridView_RowEditing(Object sender, GridViewEditEventArgs e)
  {
    // The GridView control is entering edit mode. Clear the message label.
    Message.Text = "";
  }

</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
  <head runat="server">
    <title>GridViewUpdatedEventHandler Example</title>
</head>
<body>
    <form id="form1" runat="server">

      <h3>GridViewUpdatedEventHandler Example</h3>

      <asp:label id="Message"
        forecolor="Red"          
        runat="server"/>

      <br/>

      <asp:placeholder id="GridViewPlaceHolder"
        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="CustomersSqlDataSource"  
        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">
      </asp:sqldatasource>

    </form>
  </body>
</html>

The following example demonstrates how to declaratively add a GridViewUpdatedEventHandler delegate to the RowUpdated event of a GridView control.


<%@ 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 CustomersGridView_RowUpdated(Object sender, GridViewUpdatedEventArgs e)
  {

    // Indicate whether the update operation succeeded.
    if(e.Exception == null)
    {
      Message.Text = "Row updated successfully.";
    }
    else
    {
      e.ExceptionHandled = true;
      Message.Text = "An error occurred while attempting to update the row.";
    }

  }

  void CustomersGridView_RowCancelingEdit(Object sender, GridViewCancelEditEventArgs e)
  {

    // The update operation was canceled. Clear the message label.
    Message.Text = "";

  }

  void CustomersGridView_RowEditing(Object sender, GridViewEditEventArgs e)
  {
    // The GridView control is entering edit mode. Clear the message label.
    Message.Text = "";
  }


</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
  <head runat="server">
    <title>GridView RowUpdated Example</title>
</head>
<body>
    <form id="form1" runat="server">

      <h3>GridView RowUpdated Example</h3>

      <asp:label id="Message"
        forecolor="Red"          
        runat="server"/>

      <br/>

      <!-- The GridView control automatically sets the columns     -->
      <!-- specified in the datakeynames property as read-only.    -->
      <!-- No input controls are rendered for these columns in     -->
      <!-- edit mode.                                              -->
      <asp:gridview id="CustomersGridView" 
        datasourceid="CustomersSqlDataSource" 
        autogeneratecolumns="true"
        autogenerateeditbutton="true"
        allowpaging="true" 
        datakeynames="CustomerID"
        onrowupdated="CustomersGridView_RowUpdated"
        onrowcancelingedit="CustomersGridView_RowCancelingEdit"
        onrowediting="CustomersGridView_RowEditing"   
        runat="server">
      </asp:gridview>

      <!-- 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="CustomersSqlDataSource"  
        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">
      </asp:sqldatasource>

    </form>
  </body>
</html>

.NET Framework

Supported in: 4.5, 4, 3.5, 3.0, 2.0

Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

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