GridViewEditEventArgs Class

Definition

Provides data for the RowEditing event.

public ref class GridViewEditEventArgs : System::ComponentModel::CancelEventArgs
public class GridViewEditEventArgs : System.ComponentModel.CancelEventArgs
type GridViewEditEventArgs = class
    inherit CancelEventArgs
Public Class GridViewEditEventArgs
Inherits CancelEventArgs
Inheritance
GridViewEditEventArgs

Examples

The following example demonstrates how to use the GridViewEditEventArgs object passed to the event-handling method to cancel the editing operation if the user attempts to edit a row that contains an author with the last name White.


<%@ 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_RowEditing(Object sender, GridViewEditEventArgs e)
  {
    
    // Get the country for the row being edited. For this example, the
    // country is contained in the seventh column (index 6). 
    String country = CustomersGridView.Rows[e.NewEditIndex].Cells[6].Text;

    // For this example, cancel the edit operation if the user attempts
    // to edit the record of a customer from the Unites States. 
    if (country == "USA")
    {
      // Cancel the edit operation.
      e.Cancel = true;
      Message.Text = "You cannot edit this record.";
    }
    else
    {
      Message.Text = "";
    }
    
  }
    
</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
  <head runat="server">
    <title>GridView RowEditing Example</title>
</head>
<body>
    <form id="form1" runat="server">
        
      <h3>GridView RowEditing 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"
        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>

<%@ Page language="VB" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">

  Sub CustomersGridView_RowEditing(ByVal sender As Object, ByVal e As GridViewEditEventArgs)
        
    ' Get the country for the row being edited. For this example, the
    ' country is contained in the seventh column (index 6). 
    Dim country As String = CustomersGridView.Rows(e.NewEditIndex).Cells(6).Text

    ' For this example, cancel the edit operation if the user attempts
    ' to edit the record of a customer from the United States. 
    If country = "USA" Then
    
      ' Cancel the edit operation.
      e.Cancel = True
      Message.Text = "You cannot edit this record."
     
    Else
      
      Message.Text = ""
      
    End If
    
  End Sub
    
</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
  <head runat="server">
    <title>GridView RowEditing Example</title>
</head>
<body>
    <form id="form1" runat="server">
        
      <h3>GridView RowEditing 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"
        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>

Remarks

The GridView control raises the RowEditing event when an Edit button (a button with its CommandName property set to "Edit") is clicked, but before the GridView control enters edit mode. This allows you to provide an event-handling method that performs a custom routine, such as canceling the edit operation, whenever this event occurs.

A GridViewEditEventArgs object is passed to the event-handling method, which allows you to determine the index of the row being edited and to indicate that the edit operation should be canceled. To cancel the edit operation, set the Cancel property of the GridViewEditEventArgs object to true.

For more information about how to handle events, see Handling and Raising Events.

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

Constructors

GridViewEditEventArgs(Int32)

Initializes a new instance of the GridViewEditEventArgs class.

Properties

Cancel

Gets or sets a value indicating whether the event should be canceled.

(Inherited from CancelEventArgs)
NewEditIndex

Gets or sets the index of the row being edited.

Methods

Equals(Object)

Determines whether the specified object is equal to the current object.

(Inherited from Object)
GetHashCode()

Serves as the default hash function.

(Inherited from Object)
GetType()

Gets the Type of the current instance.

(Inherited from Object)
MemberwiseClone()

Creates a shallow copy of the current Object.

(Inherited from Object)
ToString()

Returns a string that represents the current object.

(Inherited from Object)

Applies to

See also