DetailsView.ModeChanged Evento

Referência

Definição

Namespace:: System.Web.UI.WebControls

Assembly:: System.Web.dll

Importante

Algumas informações se referem a produtos de pré-lançamento que podem ser substancialmente modificados antes do lançamento. A Microsoft não oferece garantias, expressas ou implícitas, das informações aqui fornecidas.

Ocorre quando um controle DetailsView tenta mudar entre os modos de edição, inserção e somente leitura, mas depois que a propriedade CurrentMode é atualizada.

public:
 event EventHandler ^ ModeChanged;

public event EventHandler ModeChanged;

member this.ModeChanged : EventHandler

Public Custom Event ModeChanged As EventHandler

Tipo de evento

EventHandler

Exemplos

O exemplo de código a seguir demonstra como usar o ModeChanged evento para exibir o modo atual na linha de cabeçalho.


<%@ 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 CustomerDetailView_ModeChanged(Object sender, EventArgs e)
  {
    // Display the current mode in the header row.
      switch (CustomerDetailView.CurrentMode)
    {
      case DetailsViewMode.Edit:
        CustomerDetailView.HeaderText = "Edit Mode";
        CustomerDetailView.HeaderStyle.ForeColor = System.Drawing.Color.Red;
        CustomerDetailView.HeaderStyle.BackColor = System.Drawing.Color.LightGray;
        break;
      case DetailsViewMode.Insert:
        CustomerDetailView.HeaderText = "Insert Mode";
        CustomerDetailView.HeaderStyle.ForeColor = System.Drawing.Color.Green;
        CustomerDetailView.HeaderStyle.BackColor = System.Drawing.Color.Yellow;
        break;
      case DetailsViewMode.ReadOnly:
        CustomerDetailView.HeaderText = "Read-Only Mode";
        CustomerDetailView.HeaderStyle.ForeColor = System.Drawing.Color.Blue;
        CustomerDetailView.HeaderStyle.BackColor = System.Drawing.Color.White;
        break;
      default:
          CustomerDetailView.HeaderText = "Error!";
        break;
    }
  }

</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
  <head runat="server">
    <title>DetailsView ModeChanged Example</title>
</head>
<body>
    <form id="Form1" runat="server">
        
      <h3>DetailsView ModeChanged Example</h3>      
                
        <asp:detailsview id="CustomerDetailView"
          datasourceid="DetailsViewSource"
          datakeynames="CustomerID"
          autogeneraterows="true"
          autogenerateeditbutton="true"
          autogenerateinsertbutton="true"  
          allowpaging="true"
          headertext="Read-Only Mode" 
          onmodechanged="CustomerDetailView_ModeChanged" 
          runat="server">
               
          <fieldheaderstyle backcolor="Navy"
            forecolor="White"/>
            
          <headerstyle forecolor="Blue"/>
                    
        </asp:detailsview>
        
        <!-- 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" runat="server" 
          ConnectionString=
            "<%$ ConnectionStrings:NorthWindConnectionString%>"
            InsertCommand="INSERT INTO [Customers]([CustomerID], [CompanyName], [Address], [City], [PostalCode], [Country]) VALUES (@CustomerID, @CompanyName, @Address, @City, @PostalCode, @Country)"
          SelectCommand="Select [CustomerID], [CompanyName], 
            [Address], [City], [PostalCode], [Country] From 
            [Customers]">
        </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 CustomerDetailView_ModeChanged(ByVal sender As Object, ByVal e As EventArgs)
  
        ' Display the current mode in the header row.
        Select Case CustomerDetailView.CurrentMode

            Case DetailsViewMode.Edit
                CustomerDetailView.HeaderText = "Edit Mode"
                CustomerDetailView.HeaderStyle.ForeColor = System.Drawing.Color.Red
                CustomerDetailView.HeaderStyle.BackColor = System.Drawing.Color.LightGray

            Case DetailsViewMode.Insert
                CustomerDetailView.HeaderText = "Insert Mode"
                CustomerDetailView.HeaderStyle.ForeColor = System.Drawing.Color.Green
                CustomerDetailView.HeaderStyle.BackColor = System.Drawing.Color.Yellow

            Case DetailsViewMode.ReadOnly
                CustomerDetailView.HeaderText = "Read-Only Mode"
                CustomerDetailView.HeaderStyle.ForeColor = System.Drawing.Color.Blue
                CustomerDetailView.HeaderStyle.BackColor = System.Drawing.Color.White

            Case Else
                CustomerDetailView.HeaderText = "Error!"
        
        End Select
    
    End Sub
</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
  <head runat="server">
    <title>DetailsView ModeChanged Example</title>
</head>
<body>
    <form id="Form1" runat="server">
        
      <h3>DetailsView ModeChanged Example</h3>      
                
        <asp:detailsview id="CustomerDetailView"
          datasourceid="DetailsViewSource"
          datakeynames="CustomerID"
          autogeneraterows="true"
          autogenerateeditbutton="true"
          autogenerateinsertbutton="true"  
          allowpaging="true"
          headertext="Read-Only Mode" 
          onmodechanged="CustomerDetailView_ModeChanged" 
          runat="server">
               
          <fieldheaderstyle backcolor="Navy"
            forecolor="White"/>
            
          <headerstyle forecolor="Blue"/>
                    
        </asp:detailsview>
        
        <!-- 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" runat="server" 
          ConnectionString=
            "<%$ ConnectionStrings:NorthWindConnectionString%>"
            InsertCommand="INSERT INTO [Customers]([CustomerID], [CompanyName], [Address], [City], [PostalCode], [Country]) VALUES (@CustomerID, @CompanyName, @Address, @City, @PostalCode, @Country)"
          SelectCommand="Select [CustomerID], [CompanyName], 
            [Address], [City], [PostalCode], [Country] From 
            [Customers]">
        </asp:SqlDataSource>
    </form>
  </body>
</html>

Comentários

O ModeChanged evento é gerado quando um DetailsView controle tenta alterar entre o modo de edição, inserção e somente leitura, mas depois que a CurrentMode propriedade é atualizada. Isso permite que você forneça um manipulador de eventos que executa uma rotina personalizada, como sincronizar o DetailsView controle com outro controle, sempre que esse evento ocorrer.

Para obter mais informações sobre como lidar com eventos, consulte Manipulando e levantando eventos.

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