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DataKey.Values Özellik

  • Başvuru

Tanım

Ad Alanı:
System.Web.UI.WebControls
Bütünleştirilmiş Kod:
System.Web.dll

Nesnedeki DataKey her anahtar alanını içeren bir IOrderedDictionary nesnesi alır.

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

Özellik Değeri

IOrderedDictionary

IOrderedDictionary içindeki DataKeyher anahtar alanını içeren bir.

Örnekler

Aşağıdaki kod örneği, özelliği tarafından döndürülen nesnede IOrderedDictionary nasıl yineleme yapılacağını Values gösterir.


<%@ 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>

Açıklamalar

nesnesindeki Values her anahtar alanını DataKey içeren bir IOrderedDictionary nesneyi almak için özelliğini kullanın. IOrderedDictionary nesnesi genellikle bir kaydın anahtar alanlarında yineleme yapmak için kullanılır.

Şunlara uygulanır

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