Bagikan melalui

DetailsView.SelectedValue Properti

  • Referensi

Definisi

Ruang nama:
System.Web.UI.WebControls
Rakitan:
System.Web.dll

Mendapatkan nilai kunci data dari rekaman saat ini dalam DetailsView kontrol.

public:
 property System::Object ^ SelectedValue { System::Object ^ get(); };
[System.ComponentModel.Browsable(false)]
public object SelectedValue { get; }
[<System.ComponentModel.Browsable(false)>]
member this.SelectedValue : obj
Public ReadOnly Property SelectedValue As Object

Nilai Properti

Object

Nilai kunci data dari rekaman saat ini dalam DetailsView kontrol.

Atribut
BrowsableAttribute

Contoh

Contoh kode berikut menunjukkan cara menggunakan SelectedValue properti untuk menentukan nilai kunci data untuk rekaman saat ini.


<%@ 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_ItemUpdated(Object sender, DetailsViewUpdatedEventArgs e)
  {
    // Log the update operation using the key value contained
    // in the SelectedValue property.
      String keyValue = CustomerDetailView.SelectedValue.ToString();
    LogUpdate(keyValue);
  }

  void LogUpdate(String keyValue)
  {
    // Insert code to log the update operation.
  }

</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
  <head runat="server">
    <title>DetailsView SelectedValue Example</title>
</head>
<body>
    <form id="Form1" runat="server">
        
      <h3>DetailsView SelectedValue Example</h3>
                
        <asp:detailsview id="CustomerDetailView"
          datasourceid="DetailsViewSource"
          datakeynames="CustomerID"
          autogeneraterows="true"
          autogenerateeditbutton="true" 
          allowpaging="true"
          onitemupdated="CustomerDetailView_ItemUpdated" 
          runat="server">
               
          <fieldheaderstyle backcolor="Navy"
            forecolor="White"/>
                    
        </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]"
                        UpdateCommand="UPDATE [Customers] SET [CompanyName] = @CompanyName, 
            [Address] = @Address, [City] = @City,
            [PostalCode] = @PostalCode, [Country] = @Country
            WHERE [CustomerID] = @CustomerID">
        </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_ItemUpdated(ByVal sender As Object, ByVal e As DetailsViewUpdatedEventArgs)
        ' Log the update operation using the key value contained
        ' in the SelectedValue property.
        Dim keyValue As String = CustomerDetailView.SelectedValue.ToString()
        LogUpdate(keyValue)

    End Sub

    Sub LogUpdate(ByVal keyValue As String)
        ' Insert code to log the update operation.
    End Sub
</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
    <title>
            DetailsView SelectedValue Example</title>
</head>
<body>
    <form id="Form1" runat="server">
        <h3>
            DetailsView SelectedValue Example</h3>
        <asp:DetailsView ID="CustomerDetailView" DataSourceID="DetailsViewSource" DataKeyNames="CustomerID"
            AutoGenerateRows="true" AutoGenerateEditButton="true" AllowPaging="true" OnItemUpdated="CustomerDetailView_ItemUpdated"
            runat="server">
            <FieldHeaderStyle BackColor="Navy" ForeColor="White" />
        </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]"
            UpdateCommand="UPDATE [Customers] SET [CompanyName] = @CompanyName, 
            [Address] = @Address, [City] = @City,
            [PostalCode] = @PostalCode, [Country] = @Country
            WHERE [CustomerID] = @CustomerID"></asp:SqlDataSource>
    </form>
</body>
</html>

Keterangan

SelectedValue Gunakan properti untuk menentukan nilai kunci data untuk rekaman saat ini. Untuk mengambil objek aktual System.Web.UI.WebControls.DataKey yang mewakili kunci data untuk rekaman, gunakan DataKey properti .

Properti ini adalah properti default yang ControlParameter diikat objek pada durasi. Untuk informasi selengkapnya, lihat ControlValuePropertyAttribute, , ControlParameterdan Menggunakan Parameter dengan Kontrol Sumber Data untuk Pemfilteran.

Berlaku untuk

Lihat juga