ButtonColumn.Text Proprietà

Riferimento

Definizione

Spazio dei nomi:: System.Web.UI.WebControls

Assembly:: System.Web.dll

Importante

Alcune informazioni sono relative alla release non definitiva del prodotto, che potrebbe subire modifiche significative prima della release definitiva. Microsoft non riconosce alcuna garanzia, espressa o implicita, in merito alle informazioni qui fornite.

Ottiene o imposta la didascalia visualizzata nei pulsanti dell'oggetto ButtonColumn.

public:
 virtual property System::String ^ Text { System::String ^ get(); void set(System::String ^ value); };

public virtual string Text { get; set; }

member this.Text : string with get, set

Public Overridable Property Text As String

Valore della proprietà

String

Didascalia visualizzata nei pulsanti dell'oggetto ButtonColumn. Il valore predefinito è una stringa vuota ("").

Esempio

Nell'esempio di codice seguente viene illustrato come utilizzare la Text proprietà per specificare la didascalia per i pulsanti nell'oggetto ButtonColumn .

<%@ Page Language="C#" AutoEventWireup="True" %>
<%@ Import Namespace="System.Data" %>
 
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
   <script language="C#" runat="server">
 
      DataTable Cart;
      DataView CartView;
 
      ICollection CreateDataSource() 
      {
         DataTable dt = new DataTable();
         DataRow dr;
 
         dt.Columns.Add(new DataColumn("IntegerValue", typeof(Int32)));
         dt.Columns.Add(new DataColumn("StringValue", typeof(string)));
         dt.Columns.Add(new DataColumn("CurrencyValue", typeof(double)));
 
         for (int i = 0; i < 9; i++) 
         {
            dr = dt.NewRow();
 
            dr[0] = i;
            dr[1] = "Item " + i.ToString();
            dr[2] = 1.23 * (i + 1);
 
            dt.Rows.Add(dr);
         }
 
         DataView dv = new DataView(dt);
         return dv;
      }
 
      void Page_Load(Object sender, EventArgs e) 
      {
     
         if (Session["DG4_ShoppingCart"] == null) 
         {
            Cart = new DataTable();
            Cart.Columns.Add(new DataColumn("Item", typeof(string)));
            Cart.Columns.Add(new DataColumn("Price", typeof(string)));
            Session["DG4_ShoppingCart"] = Cart;
         }

         else 
         {
            Cart = (DataTable)Session["DG4_ShoppingCart"];
         }    

         CartView = new DataView(Cart);
         ShoppingCart.DataSource = CartView;
         ShoppingCart.DataBind();
 
         if (!IsPostBack) 
         {
            // Load this data only once.
            ItemsGrid.DataSource= CreateDataSource();
            ItemsGrid.DataBind();
         }
      }
 
      void Grid_CartCommand(Object sender, DataGridCommandEventArgs e) 
      {
     
         DataRow dr = Cart.NewRow();
         
         // e.Item is the table row where the command is raised.
         // For bound columns, the value is stored in the Text property of a TableCell.
         TableCell itemCell = e.Item.Cells[2];
         TableCell priceCell = e.Item.Cells[3];
         string item = itemCell.Text;
         string price = priceCell.Text;
          
         if (((Button)e.CommandSource).CommandName == "AddToCart") 
         {
            dr[0] = item;
            dr[1] = price;
            Cart.Rows.Add(dr);
         }

         else 
         {  // Remove from Cart.
         
            CartView.RowFilter = "Item='" + item + "'";
            if (CartView.Count > 0) 
            {     
               CartView.Delete(0);
            }
            CartView.RowFilter = "";
         }

         ShoppingCart.DataBind();
 
      }
 
 
   </script>
 
<head runat="server">
    <title>ButtonColumn Example</title>
</head>
<body>
 
   <form id="form1" runat="server">
 
   <h3>ButtonColumn Example</h3>
 
   <table cellpadding="5">
      <tr valign="top">
         <td>
 
            <b>Product List</b>
 
            <asp:DataGrid id="ItemsGrid"
                 BorderColor="black"
                 BorderWidth="1"
                 CellPadding="3"
                 AutoGenerateColumns="false"
                 OnItemCommand="Grid_CartCommand"
                 runat="server">

               <HeaderStyle BackColor="#00aaaa">
               </HeaderStyle>
 
               <Columns>
 
                  <asp:ButtonColumn 
                       HeaderText="Add to cart" 
                       ButtonType="PushButton" 
                       Text="Add" 
                       CommandName="AddToCart" />
 
                  <asp:ButtonColumn 
                       HeaderText="Remove from cart" 
                       ButtonType="PushButton" 
                       Text="Remove" 
                       CommandName="RemoveFromCart" />
 
                  <asp:BoundColumn 
                       HeaderText="Item" 
                       DataField="StringValue"/>

                  <asp:BoundColumn 
                       HeaderText="Price" 
                       DataField="CurrencyValue" 
                       DataFormatString="{0:c}">

                     <ItemStyle HorizontalAlign="right">
                     </ItemStyle>

                  </asp:BoundColumn>   
 
               </Columns>
 
            </asp:DataGrid>
 
         </td>
         <td>
 
            <b>Shopping Cart</b>
 
            <asp:DataGrid id="ShoppingCart" 
                 runat="server"
                 BorderColor="black"
                 BorderWidth="1"
                 GridLines="Both"
                 ShowFooter="false"
                 CellPadding="3"
                 CellSpacing="0">

               <HeaderStyle BackColor="#00aaaa">
               </HeaderStyle>

            </asp:DataGrid> 
 
         </td>
      </tr>
 
   </table>
 
   </form>
 
</body>
</html>

<%@ Page Language="VB" AutoEventWireup="True" %>
<%@ Import Namespace="System.Data" %>
 
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
   <script language="VB" runat="server">
        Dim Cart As DataTable
        Dim CartView As DataView

        Function CreateDataSource() As ICollection
            Dim dt As New DataTable()
            Dim dr As DataRow
            
            dt.Columns.Add(New DataColumn("IntegerValue", GetType(Int32)))
            dt.Columns.Add(New DataColumn("StringValue", GetType(String)))
            dt.Columns.Add(New DataColumn("CurrencyValue", GetType(Double)))
            
            Dim i As Integer
            For i = 0 To 8
                dr = dt.NewRow()
                
                dr(0) = i
                dr(1) = "Item " + i.ToString()
                dr(2) = 1.23 *(i + 1)
                
                dt.Rows.Add(dr)
            Next i
            
            Dim dv As New DataView(dt)
            CreateDataSource = dv
        End Function

        Sub Page_Load (sender As Object, e As EventArgs)
            If Session("DG4_ShoppingCart") Is Nothing Then
                Cart = New DataTable()
                Cart.Columns.Add(New DataColumn("Item", GetType(String)))
                Cart.Columns.Add(New DataColumn("Price", GetType(String)))
                Session("DG4_ShoppingCart") = Cart
            
            Else
                Cart = CType(Session("DG4_ShoppingCart"), DataTable)
            End If
            
            CartView = New DataView(Cart)
            ShoppingCart.DataSource = CartView
            ShoppingCart.DataBind()
            
            If Not IsPostBack Then
                ' Load this data only once.
                ItemsGrid.DataSource = CreateDataSource()
                ItemsGrid.DataBind()
            End If
        End Sub

        Sub Grid_CartCommand(sender As Object, e As DataGridCommandEventArgs)
            Dim dr As DataRow = Cart.NewRow()
            
            ' e.Item is the table row where the command is raised.
            ' For bound columns, the value is stored in the Text property of the TableCell.
            Dim itemCell As TableCell = e.Item.Cells(2)
            Dim priceCell As TableCell = e.Item.Cells(3)
            Dim item As String = itemCell.Text
            Dim price As String = priceCell.Text
            
            If CType(e.CommandSource, Button).CommandName = "AddToCart" Then
                dr(0) = item
                dr(1) = price
                Cart.Rows.Add(dr)
            
            Else 

                ' Remove from Cart.
                CartView.RowFilter = "Item" + ChrW(61) + "'" + item + "'"
                If CartView.Count > 0 Then
                    CartView.Delete(0)
                End If
                CartView.RowFilter = ""
            End If
            
            ShoppingCart.DataBind()
        End Sub 
  </script>
 
<head runat="server">
    <title>ButtonColumn Example</title>
</head>
<body>
 
   <form id="form1" runat="server">
 
   <h3>ButtonColumn Example</h3>
 
   <table cellpadding="5">
      <tr valign="top">
         <td>
 
            <b>Product List</b>
 
            <asp:DataGrid id="ItemsGrid"
                 BorderColor="black"
                 BorderWidth="1"
                 CellPadding="3"
                 AutoGenerateColumns="false"
                 OnItemCommand="Grid_CartCommand"
                 runat="server">

               <HeaderStyle BackColor="#00aaaa">
               </HeaderStyle>
 
               <Columns>
 
                  <asp:ButtonColumn 
                       HeaderText="Add to cart" 
                       ButtonType="PushButton" 
                       Text="Add" 
                       CommandName="AddToCart" />
 
                  <asp:ButtonColumn 
                       HeaderText="Remove from cart" 
                       ButtonType="PushButton" 
                       Text="Remove" 
                       CommandName="RemoveFromCart" />
 
                  <asp:BoundColumn 
                       HeaderText="Item" 
                       DataField="StringValue"/>

                  <asp:BoundColumn 
                       HeaderText="Price" 
                       DataField="CurrencyValue" 
                       DataFormatString="{0:c}">

                     <ItemStyle HorizontalAlign="right">
                     </ItemStyle>

                  </asp:BoundColumn>   
 
               </Columns>
 
            </asp:DataGrid>
 
         </td>
         <td>
 
            <b>Shopping Cart</b>
 
            <asp:DataGrid id="ShoppingCart" 
                 runat="server"
                 BorderColor="black"
                 BorderWidth="1"
                 GridLines="Both"
                 ShowFooter="false"
                 CellPadding="3"
                 CellSpacing="0">

               <HeaderStyle BackColor="#00aaaa">
               </HeaderStyle>

            </asp:DataGrid> 
 
         </td>
      </tr>
 
   </table>
 
   </form>
 
</body>
</html>

Commenti

Utilizzare la Text proprietà per specificare o determinare la didascalia visualizzata nei pulsanti dell'oggetto ButtonColumn .

Nota

Se si imposta la Text proprietà, tutti i pulsanti nella ButtonColumn condivisione della stessa didascalia.

In alternativa, è possibile associare a un campo in un'origine ButtonColumn dati. In questo modo è possibile visualizzare didascalie diverse per i pulsanti nella colonna usando i valori nel campo specificato. Impostare la DataTextField proprietà per associare l'oggetto a un campo in un'origine ButtonColumn dati.

Il valore di questa proprietà viene archiviato nello stato di visualizzazione.

Il valore di questa proprietà, se impostato, può essere salvato automaticamente in un file di risorse usando uno strumento di progettazione. Per altre informazioni, vedere LocalizableAttribute Globalizzazione e localizzazione.

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