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DataKey.Values Propiedad

  • Referencia

Definición

Espacio de nombres:
System.Web.UI.WebControls
Ensamblado:
System.Web.dll

Obtiene un objeto IOrderedDictionary que contiene todos los campos clave del objeto DataKey.

public:
 virtual property System::Collections::Specialized::IOrderedDictionary ^ Values { System::Collections::Specialized::IOrderedDictionary ^ get(); };
public virtual System.Collections.Specialized.IOrderedDictionary Values { get; }
member this.Values : System.Collections.Specialized.IOrderedDictionary
Public Overridable ReadOnly Property Values As IOrderedDictionary

Valor de propiedad

IOrderedDictionary

Un objeto IOrderedDictionary que contiene todos los campos clave de DataKey.

Ejemplos

En el ejemplo de código siguiente se muestra cómo recorrer en iteración el IOrderedDictionary objeto devuelto por la Values propiedad .


<%@ 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 CustomerDetailsView_DataBound(Object sender, EventArgs e)
  {

    // Retrieve the IOrderedDictionary object that contains the key field values.
    IOrderedDictionary allKeysDictionary = CustomerDetailsView.DataKey.Values;

    // Display the value of the key fields.
    MessageLabel.Text = "The key field values for the displayed record are: <br/><br/>";

    foreach (DictionaryEntry entry in allKeysDictionary)
    {
      MessageLabel.Text += "Key=" + entry.Key.ToString() + 
        ", Value=" + entry.Value.ToString() + "<br/>";
    }

  }
  
</script>

<html xmlns="http://www.w3.org/1999/xhtml" >

  <head runat="server">
    <title>DataKey Example</title>
</head>
<body>
    <form id="form1" runat="server">
        
      <h3>DataKey Example</h3>
                       
        <asp:detailsview id="CustomerDetailsView"
          datasourceid="DetailsViewSource"
          autogeneraterows="true"
          datakeynames="CustomerID, CompanyName, PostalCode"  
          allowpaging="true"
          ondatabound="CustomerDetailsView_DataBound" 
          runat="server">
            
        </asp:detailsview>
        
        <br/>
        
        <asp:label id="MessageLabel"
          forecolor="Red"
          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="DetailsViewSource"
          selectcommand="Select [CustomerID], [CompanyName], [Address], [City], [PostalCode], [Country] From [Customers]"
          connectionstring="<%$ ConnectionStrings:NorthWindConnectionString%>" 
          runat="server"/>
            
      </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 CustomerDetailsView_DataBound(ByVal sender As Object, ByVal e As EventArgs) Handles CustomerDetailsView.DataBound
    
    ' Retrieve the IOrderedDictionary object that contains the key field values.
    Dim allKeysDictionary As IOrderedDictionary = CustomerDetailsView.DataKey.Values

    ' Display the value of the key fields.
    MessageLabel.Text = "The key field values for the displayed record are: <br/><br/>"

    ' In Visual Basic, the DictionaryEntry objects contained in the 
    ' allKeysDictionary object must be copied to an array before
    ' you can iterate through the items.
    Dim allKeysArray(allKeysDictionary.Count - 1) As DictionaryEntry
    allKeysDictionary.CopyTo(allKeysArray, 0)
    
    Dim entry As DictionaryEntry
    For Each entry In allKeysArray
     
      MessageLabel.Text &= "Key=" & entry.Key.ToString() & _
          ", Value=" & entry.Value.ToString() & "<br/>"
    
    Next

  End Sub
  
</script>

<html xmlns="http://www.w3.org/1999/xhtml" >

  <head runat="server">
    <title>DataKey Example</title>
</head>
<body>
    <form id="form1" runat="server">
        
      <h3>DataKey Example</h3>
                       
        <asp:detailsview id="CustomerDetailsView"
          datasourceid="DetailsViewSource"
          autogeneraterows="true"
          datakeynames="CustomerID, CompanyName, PostalCode"  
          allowpaging="true"
          runat="server">
            
        </asp:detailsview>
        
        <br/>
        
        <asp:label id="MessageLabel"
          forecolor="Red"
          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="DetailsViewSource"
          selectcommand="Select [CustomerID], [CompanyName], [Address], [City], [PostalCode], [Country] From [Customers]"
          connectionstring="<%$ ConnectionStrings:NorthWindConnectionString%>" 
          runat="server"/>
            
      </form>
  </body>
</html>

Comentarios

Utilice la Values propiedad para recuperar un IOrderedDictionary objeto que contiene todos los campos de clave del DataKey objeto. El IOrderedDictionary objeto se usa a menudo para recorrer en iteración los campos clave de un registro.

Se aplica a

Consulte también