GridView.DataKeys Properti
Definisi
Penting
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public:
virtual property System::Web::UI::WebControls::DataKeyArray ^ DataKeys { System::Web::UI::WebControls::DataKeyArray ^ get(); };[System.ComponentModel.Browsable(false)]
public virtual System.Web.UI.WebControls.DataKeyArray DataKeys { get; }[<System.ComponentModel.Browsable(false)>]
member this.DataKeys : System.Web.UI.WebControls.DataKeyArrayPublic Overridable ReadOnly Property DataKeys As DataKeyArrayNilai Properti
DataKeyArray yang berisi kunci data setiap baris dalam GridView kontrol.
- Atribut
Contoh
Contoh berikut menunjukkan cara menggunakan DataKeys properti untuk menentukan nilai kunci data baris yang dipilih dalam GridView kontrol.
<%@ 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_SelectedIndexChanged(Object sender, EventArgs e)
{
// Determine the index of the selected row.
int index = CustomersGridView.SelectedIndex;
// Display the primary key value of the selected row.
Message.Text = "The primary key value of the selected row is " +
CustomersGridView.DataKeys[index].Value.ToString() + ".";
}
</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>GridView DataKeys Example</title>
</head>
<body>
<form id="form1" runat="server">
<h3>GridView DataKeys Example</h3>
<asp:label id="Message"
forecolor="Red"
runat="server"/>
<br/><br/>
<asp:gridview id="CustomersGridView"
datasourceid="CustomersSource"
autogeneratecolumns="true"
emptydatatext="No data available."
autogenerateselectbutton="true"
datakeynames="CustomerID"
onselectedindexchanged="CustomersGridView_SelectedIndexChanged"
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="CustomersSource"
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 CustomersGridView_SelectedIndexChanged(ByVal sender As Object, ByVal e As EventArgs)
' Determine the index of the selected row.
Dim index As Integer = CustomersGridView.SelectedIndex
' Display the primary key value of the selected row.
Message.Text = "The primary key value of the selected row is " & _
CustomersGridView.DataKeys(index).Value.ToString() & "."
End Sub
</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>GridView DataKeys Example</title>
</head>
<body>
<form id="form1" runat="server">
<h3>GridView DataKeys Example</h3>
<asp:label id="Message"
forecolor="Red"
runat="server"/>
<br/><br/>
<asp:gridview id="CustomersGridView"
datasourceid="CustomersSource"
autogeneratecolumns="true"
emptydatatext="No data available."
autogenerateselectbutton="true"
datakeynames="CustomerID"
onselectedindexchanged="CustomersGridView_SelectedIndexChanged"
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="CustomersSource"
selectcommand="Select [CustomerID], [CompanyName], [Address], [City], [PostalCode], [Country] From [Customers]"
connectionstring="<%$ ConnectionStrings:NorthWindConnectionString%>"
runat="server"/>
</form>
</body>
</html>
Keterangan
DataKeyNames Saat properti diatur, GridView kontrol secara otomatis membuat DataKey objek untuk setiap baris dalam kontrol. Objek DataKey berisi nilai bidang atau bidang yang ditentukan dalam DataKeyNames properti . Objek DataKey kemudian ditambahkan ke koleksi kontrol DataKeys . DataKeys Gunakan properti untuk mengambil DataKey objek untuk baris data tertentu dalam GridView kontrol.
Nota
Anda dapat menggunakan SelectedDataKey properti untuk mengambil DataKey objek untuk baris yang saat ini dipilih. Anda juga dapat menggunakan SelectedValue properti untuk mengambil nilai kunci data untuk baris yang saat ini dipilih secara langsung.
