ButtonFieldBase.ShowHeader Proprietà

Definizione

Ottiene o imposta un valore che indica se la sezione di intestazione viene visualizzata in un oggetto ButtonFieldBase.Gets or sets a value indicating whether the header section is displayed in a ButtonFieldBase object.

public:
 virtual property bool ShowHeader { bool get(); void set(bool value); };
public override bool ShowHeader { get; set; }
member this.ShowHeader : bool with get, set
Public Overrides Property ShowHeader As Boolean

Valore della proprietà

true per visualizzare la sezione di intestazione; in caso contrario, false.true to show the header section; otherwise, false. Il valore predefinito è false.The default is false.

Esempio

Nell'esempio di codice riportato di seguito viene illustrato ShowHeader come utilizzare la proprietà per visualizzare la sezione ButtonField di intestazione di DetailsView un oggetto in un controllo.The following code example demonstrates how to use the ShowHeader property to display the header section of a ButtonField object in a DetailsView 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 ProductsDetailsView_ItemCommand(Object sender, DetailsViewCommandEventArgs e)
  {
  
    if(e.CommandName == "Add")
    {
      // Retrieve the current author's last name. In this example, the
      // last name is displayed in the second cell (index 1) of the 
      // second row (index 1).
      string lastName = ProductsDetailsView.Rows[1].Cells[1].Text;
      
      // Create a ListItem object to represent the author.
      ListItem item = new ListItem(lastName);
      
      // Add the ListItem to the list box control if it does not
      // already appear in the ListBox.
      if(!ProductsListBox.Items.Contains(item))
      {
        ProductsListBox.Items.Add(item);
      }
      
    }
  
  }

</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
  <head runat="server">
    <title>ButtonFieldBase ShowHeader Example</title>
</head>
<body>
    <form id="form1" runat="server">
        
      <h3>ButtonFieldBase ShowHeader Example</h3>
      
      Click the Add button to add the product to the list box.
      
      <table cellpadding="30">
      
        <tr>
        
          <td>
        
            <!-- Set the ShowHeader property of the ButtonField -->
            <!-- declaratively to display the header section in -->
            <!-- that row.                                      -->
            <asp:detailsview id="ProductsDetailsView" 
              datasourceid="ProductsSqlDataSource" 
              autogeneraterows="false"
              allowpaging="true"
              gridlines="both"
              onitemcommand="ProductsDetailsView_ItemCommand"   
              runat="server">
                
              <Fields>
                
                <asp:buttonfield buttontype="Link" 
                  commandname="Add"
                  headertext="Add Product" 
                  showheader="true" 
                  text="Add"/>
                <asp:boundfield datafield="ProductID" 
                  headertext="ID"/>
                <asp:boundfield datafield="ProductName" 
                  headertext="Product"/>
                
              </Fields>
                
            </asp:detailsview>
            
            <!-- This example uses Microsoft SQL Server and connects -->
            <!-- to the Northwind sample database.                        -->
            <asp:sqldatasource id="ProductsSqlDataSource"  
              selectcommand="SELECT ProductName, ProductID FROM Products"
              connectionstring="<%$ ConnectionStrings:NorthwindConnection %>"
              runat="server">        
            </asp:sqldatasource>     
      
          </td>
          
          <td>
      
            Products List:<br/>
            <asp:listbox id="ProductsListBox" 
              runat="server"/>
         
          </td>
         
        </tr>
           
      </table>
            
    </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 ProductsDetailsView_ItemCommand(ByVal sender As Object, ByVal e As DetailsViewCommandEventArgs)
  
        If e.CommandName = "Add" Then

            ' Retrieve the current author's last name. In this example, the
            ' last name is displayed in the second cell (index 1) of the 
            ' second row (index 1).
            Dim lastName As String = ProductsDetailsView.Rows(1).Cells(1).Text
      
            ' Create a ListItem object to represent the author.
            Dim item As ListItem = New ListItem(lastName)
      
            ' Add the ListItem to the list box control if it does not
            ' already appear in the ListBox.
            If Not ProductsListBox.Items.Contains(item) Then

                ProductsListBox.Items.Add(item)
      
            End If
      
        End If
  
    End Sub

</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
  <head runat="server">
    <title>ButtonFieldBase ShowHeader Example</title>
</head>
<body>
    <form id="form1" runat="server">
        
      <h3>ButtonFieldBase ShowHeader Example</h3>
      
      Click the Add button to add the product to the list box.
      
      <table cellpadding="30">
      
        <tr>
        
          <td>
        
            <!-- Set the ShowHeader property of the ButtonField -->
            <!-- declaratively to display the header section in -->
            <!-- that row.                                      -->
            <asp:detailsview id="ProductsDetailsView" 
              datasourceid="ProductsSqlDataSource" 
              autogeneraterows="false"
              allowpaging="true"
              gridlines="both"
              onitemcommand="ProductsDetailsView_ItemCommand"   
              runat="server">
                
              <Fields>
                
                <asp:buttonfield buttontype="Link" 
                  commandname="Add"
                  headertext="Add Product" 
                  showheader="true" 
                  text="Add"/>
                <asp:boundfield datafield="ProductID" 
                  headertext="ID"/>
                <asp:boundfield datafield="ProductName" 
                  headertext="Product"/>
                
              </Fields>
                
            </asp:detailsview>
            
            <!-- This example uses Microsoft SQL Server and connects -->
            <!-- to the Northwind sample database.                        -->
            <asp:sqldatasource id="ProductsSqlDataSource"  
              selectcommand="SELECT ProductName, ProductID FROM Products"
              connectionstring="<%$ ConnectionStrings:NorthwindConnection %>"
              runat="server">        
            </asp:sqldatasource>     
      
          </td>
          
          <td>
      
            Products List:<br/>
            <asp:listbox id="ProductsListBox" 
              runat="server"/>
         
          </td>
         
        </tr>
           
      </table>
            
    </form>
  </body>
</html>

Commenti

Utilizzare la ShowHeader proprietà per mostrare o nascondere la sezione di intestazione di ButtonFieldBase un oggetto.Use the ShowHeader property to show or hide the header section of a ButtonFieldBase object. Per visualizzare la sezione di intestazione, impostare ShowHeader la proprietà truesu.To show the header section, set the ShowHeader property to true.

Nota

Alcuni controlli associati a dati, ad esempio il GridView controllo, possono visualizzare o nascondere solo l'intera sezione di intestazione del controllo.Some data-bound controls (such as the GridView control) can show or hide only the entire header section of the control. Questi controlli associati a dati non supportano la ShowHeader proprietà per un singolo campo Button.These data-bound controls do not support the ShowHeader property for an individual button field. Per visualizzare o nascondere l'intera sezione di intestazione di un controllo con associazione a dati (se disponibile), ShowHeader utilizzare la proprietà per il controllo.To show or hide the entire header section of a data-bound control (if available), use the ShowHeader property for the control.

Il valore di questa proprietà viene archiviato nello stato di visualizzazione.The value of this property is stored in view state.

Si applica a

Vedi anche