DetailsViewDeletedEventArgs.Values 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 pasangan nama/nilai bidang non-kunci untuk item yang akan dihapus.
public:
property System::Collections::Specialized::IOrderedDictionary ^ Values { System::Collections::Specialized::IOrderedDictionary ^ get(); };public System.Collections.Specialized.IOrderedDictionary Values { get; }member this.Values : System.Collections.Specialized.IOrderedDictionaryPublic ReadOnly Property Values As IOrderedDictionaryNilai Properti
IOrderedDictionary yang berisi kamus pasangan nama/nilai bidang non-kunci untuk item yang akan dihapus.
Contoh
Contoh kode berikut menunjukkan cara menggunakan Values properti untuk mengakses nilai bidang non-kunci rekaman yang dihapus.
<%@ 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 StoresDetailView_ItemDeleted(Object sender,
DetailsViewDeletedEventArgs e)
{
// Display the value of the key fields in the Keys property.
KeysMessageLabel.Text =
"The key fields for the deleted record are: <br/>";
foreach (DictionaryEntry entry in e.Keys)
{
DisplayValue(entry, KeysMessageLabel);
}
// Display the value of the non-key fields in the Values
// property.
ValuesMessageLabel.Text =
"The non-key fields for the deleted record are: <br/>";
foreach (DictionaryEntry entry in e.Values)
{
DisplayValue(entry, ValuesMessageLabel);
}
}
void DisplayValue(DictionaryEntry entry, Label displayLabel)
{
// Display the field name contained in the DictionaryEntry object.
if (entry.Key != null)
{
displayLabel.Text += "Name=" + entry.Key.ToString() + ", ";
}
else
{
displayLabel.Text += "Name=null, ";
}
// Display the field value contained in the DictionaryEntry object.
if (entry.Value != null)
{
displayLabel.Text += "Value=" + entry.Value.ToString() + "<br/>";
}
else
{
displayLabel.Text += "Value=null<br/>";
}
}
</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>DetailsViewDeletedEventArgs Keys and Values Example</title>
</head>
<body>
<form id="form1" runat="server">
<h3>DetailsViewDeletedEventArgs Keys and Values Example</h3>
<asp:detailsview id="CustomerDetailsView"
datasourceid="DetailsViewSource"
datakeynames="CustomerID"
autogeneratedeletebutton="true"
autogeneraterows="true"
allowpaging="true"
onitemdeleted="StoresDetailView_ItemDeleted"
runat="server">
<fieldheaderstyle backcolor="Navy"
forecolor="White"/>
</asp:detailsview>
<asp:label id="KeysMessageLabel"
forecolor="Red"
runat="server"/>
<br/><br/>
<asp:label id="ValuesMessageLabel"
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]"
deletecommand="Delete [Customers]
Where [CustomerID]=@CustomerID"
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 StoresDetailView_ItemDeleted(ByVal sender As Object, _
ByVal e As DetailsViewDeletedEventArgs)
Dim entry As DictionaryEntry
Dim i As Integer
' Display the value of the key fields in the Keys property.
KeysMessageLabel.Text = _
"The key fields for the deleted record are: <br/>"
' In VB, you cannot iterate through the DictionaryEntry objects
' in the Keys property directly. Use the CopyTo method to
' copy the objects to an array first.
Dim keysArray(e.Keys.Count - 1) As DictionaryEntry
e.Keys.CopyTo(keysArray, 0)
' Iterate through the array and display its values.
For Each entry In keysArray
DisplayValue(entry, KeysMessageLabel)
Next
' Display the value of the non-key fields in the Values
' property.
ValuesMessageLabel.Text = _
"The non-key fields for the deleted record are: <br/>"
Dim valuesArray(e.Values.Count - 1) As DictionaryEntry
e.Values.CopyTo(valuesArray, 0)
For Each entry In valuesArray
DisplayValue(entry, ValuesMessageLabel)
Next
End Sub
Sub DisplayValue(ByVal entry As DictionaryEntry, _
ByVal displayLabel As Label)
' Display the field name contained in the DictionaryEntry object.
If entry.Key IsNot Nothing Then
displayLabel.Text &= "Name=" & entry.Key.ToString() & ", "
Else
displayLabel.Text &= "Name=null, "
End If
' Display the field value contained in the DictionaryEntry object.
If entry.Value IsNot Nothing Then
displayLabel.Text &= "Value=" & entry.Value.ToString() & "<br/>"
Else
displayLabel.Text &= "Value=null<br/>"
End If
End Sub
</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>DetailsViewDeletedEventArgs Keys and Values Example</title>
</head>
<body>
<form id="form1" runat="server">
<h3>DetailsViewDeletedEventArgs Keys and Values Example</h3>
<asp:detailsview id="CustomerDetailsView"
datasourceid="DetailsViewSource"
datakeynames="CustomerID"
autogeneratedeletebutton="true"
autogeneraterows="true"
allowpaging="true"
onitemdeleted="StoresDetailView_ItemDeleted"
runat="server">
<fieldheaderstyle backcolor="Navy"
forecolor="White"/>
</asp:detailsview>
<asp:label id="KeysMessageLabel"
forecolor="Red"
runat="server"/>
<br/><br/>
<asp:label id="ValuesMessageLabel"
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]"
deletecommand="Delete [Customers]
Where [CustomerID]=@CustomerID"
connectionstring=
"<%$ ConnectionStrings:NorthWindConnectionString%>"
runat="server"/>
</form>
</body>
</html>
Keterangan
Values Gunakan properti untuk mengakses nilai bidang non-kunci agar rekaman dihapus. Misalnya, Anda dapat menggunakan nilai-nilai ini untuk menyimpan log rekaman yang dihapus.
Nota
Properti ini tidak berisi bidang kunci untuk rekaman. Untuk mengakses bidang kunci, gunakan Keys properti .
Properti Values mengembalikan IOrderedDictionary objek yang mengimplementasikan IOrderedDictionary antarmuka. Objek berisi DictionaryEntry objek yang mewakili bidang non-kunci rekaman yang akan dihapus.
Nota
Sebagai pintasan, Anda juga dapat menggunakan pengindeks IOrderedDictionary objek untuk mengakses nilai bidang secara langsung.
