GridViewRowEventHandler Delegar

Definição

Espaço de Nomes:
System.Web.UI.WebControls
Assemblagem:
System.Web.dll

Representa o método que gere os RowCreated eventos e RowDataBound de um GridView controlo.

public delegate void GridViewRowEventHandler(System::Object ^ sender, GridViewRowEventArgs ^ e);
public delegate void GridViewRowEventHandler(object sender, GridViewRowEventArgs e);
type GridViewRowEventHandler = delegate of obj * GridViewRowEventArgs -> unit
Public Delegate Sub GridViewRowEventHandler(sender As Object, e As GridViewRowEventArgs)

Parâmetros

sender
Object

A origem do evento.

e
GridViewRowEventArgs

Um objeto que contém os dados do GridViewRowEventArgs evento.

Exemplos

O exemplo seguinte demonstra como adicionar programaticamente um GridViewRowEventHandler delegado ao RowDataBound evento de um GridView controlo.


<%@ 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.AllowPaging = true;

    // Programmatically register the event-handling method.
    customersGridView.RowDataBound += new GridViewRowEventHandler(this.CustomersGridView_RowDataBound);
       
    // Add the GridView control to the Controls collection
    // of the PlaceHolder control.
    GridViewPlaceHolder.Controls.Add(customersGridView);

  }

  void CustomersGridView_RowDataBound(Object sender, GridViewRowEventArgs e)
  {
        
    if(e.Row.RowType == DataControlRowType.DataRow)
    {
      // Display the company name in italics.
      e.Row.Cells[1].Text = "<i>" + e.Row.Cells[1].Text + "</i>";
        
    }
    
  }

</script>

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

      <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]"
        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 Page_Load(ByVal sender As Object, ByVal e As EventArgs)
        
    ' Create a new GridView control.
    Dim customersGridView As New GridView()
         
    ' Set the GridView control's properties.
    customersGridView.ID = "CustomersGridView"
    customersGridView.DataSourceID = "CustomersSqlDataSource"
    customersGridView.AutoGenerateColumns = True
    customersGridView.AllowPaging = True

    ' Programmatically register the event-handling method.
    AddHandler customersGridView.RowDataBound, AddressOf CustomersGridView_RowDataBound
       
    ' Add the GridView control to the Controls collection
    ' of the PlaceHolder control.
    GridViewPlaceHolder.Controls.Add(customersGridView)

  End Sub

  Sub CustomersGridView_RowDataBound(ByVal sender As Object, ByVal e As GridViewRowEventArgs)
        
    If e.Row.RowType = DataControlRowType.DataRow Then
    
      ' Display the company name in italics.
      e.Row.Cells(1).Text = "<i>" & e.Row.Cells(1).Text & "</i>"
        
    End If
    
  End Sub

</script>

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

      <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]"
        connectionstring="<%$ ConnectionStrings:NorthWindConnectionString%>"
        runat="server">
      </asp:sqldatasource>
            
            
    </form>
  </body>
</html>

O exemplo seguinte demonstra como adicionar declarativamente um GridViewRowEventHandler delegado ao RowDataBound evento de um GridView controlo.


<%@ 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_RowDataBound(Object sender, GridViewRowEventArgs e)
  {
        
    if(e.Row.RowType == DataControlRowType.DataRow)
    {
      // Display the company name in italics.
      e.Row.Cells[1].Text = "<i>" + e.Row.Cells[1].Text + "</i>";
        
    }
    
  }

</script>

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

      <asp:gridview id="CustomersGridView" 
        datasourceid="CustomersSqlDataSource" 
        autogeneratecolumns="true"
        allowpaging="true"
        onrowdatabound="CustomersGridView_RowDataBound" 
        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]"
        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_RowDataBound(ByVal sender As Object, ByVal e As GridViewRowEventArgs)

    If e.Row.RowType = DataControlRowType.DataRow Then
    
      ' Display the company name in italics.
      e.Row.Cells(1).Text = "<i>" & e.Row.Cells(1).Text & "</i>"
        
    End If
    
  End Sub

</script>

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

      <asp:gridview id="CustomersGridView" 
        datasourceid="CustomersSqlDataSource" 
        autogeneratecolumns="true"
        allowpaging="true"
        onrowdatabound="CustomersGridView_RowDataBound" 
        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]"
        connectionstring="<%$ ConnectionStrings:NorthWindConnectionString%>"
        runat="server">
      </asp:sqldatasource>
            
            
    </form>
  </body>
</html>

Observações

Antes de o GridView controlo poder ser renderizado, deve ser criado um GridViewRow objeto para cada linha do controlo. O RowCreated evento é elevado cada vez que uma linha no GridView controlo é criada. Isto permite-lhe fornecer um método de gestão de eventos que executa uma rotina personalizada, como adicionar conteúdo personalizado a uma linha, sempre que este evento ocorre.

De forma semelhante, cada linha do controlo deve estar associada a um registo na fonte de dados antes de o GridView controlo poder ser renderizado. O RowDataBound evento é ativado quando uma linha de dados (representada por um GridViewRow objeto) está ligada a dados no GridView controlo. Isto permite-lhe fornecer um método de gestão de eventos que executa uma rotina personalizada, como modificar os valores dos dados atribuídos à linha, sempre que este evento ocorre.

Quando cria um GridViewRowEventHandler delegado, identifica o método que irá gerir o evento. Para associar o evento ao seu gestor de eventos, adicione uma instância do delegado ao evento. O gestor de eventos é chamado sempre que o evento ocorre, a menos que remova o delegado. Para mais informações sobre os delegados handlers de eventos, consulte Gestão e Angariação de Eventos.

Métodos da Extensão

Name Description
GetMethodInfo(Delegate)

Obtém um objeto que representa o método representado pelo delegado especificado.

Aplica-se a

Ver também