GridViewUpdateEventArgs.NewValues Properti
Definisi
Penting
Beberapa informasi terkait produk prarilis yang dapat diubah secara signifikan sebelum dirilis. Microsoft tidak memberikan jaminan, tersirat maupun tersurat, sehubungan dengan informasi yang diberikan di sini.
Mendapatkan kamus yang berisi nilai yang direvisi dari pasangan nama/nilai bidang non-kunci dalam baris yang akan diperbarui.
public:
property System::Collections::Specialized::IOrderedDictionary ^ NewValues { System::Collections::Specialized::IOrderedDictionary ^ get(); };public System.Collections.Specialized.IOrderedDictionary NewValues { get; }member this.NewValues : System.Collections.Specialized.IOrderedDictionaryPublic ReadOnly Property NewValues As IOrderedDictionaryNilai Properti
Objek IOrderedDictionary yang berisi nilai yang direvisi dari pasangan nama/nilai bidang non-kunci dalam baris untuk diperbarui.
Contoh
Contoh berikut menunjukkan cara menggunakan NewValues properti untuk mengodekan HTML semua nilai yang disediakan oleh pengguna sebelum memperbarui sumber data.
<%@ 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 CustomersGridView_RowUpdating(Object sender, GridViewUpdateEventArgs e)
{
// Iterate through the NewValues collection and HTML encode all
// user-provided values before updating the data source.
foreach (DictionaryEntry entry in e.NewValues)
{
e.NewValues[entry.Key] = Server.HtmlEncode(entry.Value.ToString());
}
}
</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>GridView RowUpdating Example</title>
</head>
<body>
<form id="form1" runat="server">
<h3>GridView RowUpdating Example</h3>
<!-- The GridView control automatically sets the columns -->
<!-- specified in the datakeynames property as read-only. -->
<!-- No input controls are rendered for these columns in -->
<!-- edit mode. -->
<asp:gridview id="CustomersGridView"
datasourceid="CustomersSqlDataSource"
autogeneratecolumns="true"
autogenerateeditbutton="true"
allowpaging="true"
datakeynames="CustomerID"
onrowupdating="CustomersGridView_RowUpdating"
runat="server">
</asp:gridview>
<!-- 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="CustomersSqlDataSource"
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)"
connectionstring="<%$ ConnectionStrings:NorthWindConnectionString%>"
runat="server">
</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 CustomersGridView_RowUpdating(ByVal sender As Object, ByVal e As GridViewUpdateEventArgs)
' Use the CopyTo method to copy the DictionaryEntry objects in the
' NewValues collection to an array.
Dim records(e.NewValues.Count - 1) As DictionaryEntry
e.NewValues.CopyTo(records, 0)
' Iterate through the array and HTML encode all user-provided values
' before updating the data source.
Dim entry As DictionaryEntry
For Each entry In records
e.NewValues(entry.Key) = Server.HtmlEncode(entry.Value.ToString())
Next
End Sub
</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>GridView RowUpdating Example</title>
</head>
<body>
<form id="form1" runat="server">
<h3>GridView RowUpdating Example</h3>
<!-- The GridView control automatically sets the columns -->
<!-- specified in the datakeynames property as read-only. -->
<!-- No input controls are rendered for these columns in -->
<!-- edit mode. -->
<asp:gridview id="CustomersGridView"
datasourceid="CustomersSqlDataSource"
autogeneratecolumns="true"
autogenerateeditbutton="true"
allowpaging="true"
datakeynames="CustomerID"
onrowupdating="CustomersGridView_RowUpdating"
runat="server">
</asp:gridview>
<!-- 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="CustomersSqlDataSource"
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)"
connectionstring="<%$ ConnectionStrings:NorthWindConnectionString%>"
runat="server">
</asp:sqldatasource>
</form>
</body>
</html>
Keterangan
NewValues Gunakan properti (kamus) untuk mengakses nilai bidang non-kunci yang direvisi di baris untuk diperbarui.
Nota
Bidang atau bidang kunci utama tidak disertakan dalam kamus ini. Untuk mengakses nilai bidang atau bidang kunci utama, gunakan Keys properti . Untuk mengakses nilai asli bidang non-kunci di baris, gunakan OldValues properti .
Properti NewValues secara otomatis diisi dengan pasangan nama/nilai dari bidang non-kunci yang direvisi dalam baris. Entri terpisah ditambahkan ke NewValues properti untuk setiap bidang non-kunci dalam baris.
Untuk menentukan nama bidang entri, gunakan DictionaryEntry.Key properti objek yang System.Collections.DictionaryEntry terkandung dalam NewValues kamus. Untuk menentukan nilai entri, gunakan DictionaryEntry.Value properti .
