DataListCommandEventArgs.CommandSource 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 sumber perintah.
public:
property System::Object ^ CommandSource { System::Object ^ get(); };public object CommandSource { get; }member this.CommandSource : objPublic ReadOnly Property CommandSource As ObjectNilai Properti
Sumber perintah.
Contoh
Contoh berikut menunjukkan cara menggunakan CommandSource properti untuk menentukan perintah yang dipilih oleh pengguna. Kemudian melakukan tindakan yang sesuai berdasarkan, pada perintah .
<%@ Page Language="C#" AutoEventWireup="True" %>
<%@ Import Namespace="System.Data" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
<head>
<title>DataListCommandEventArgs Example</title>
<script language="c#" runat="server">
ICollection CreateDataSource()
{
DataTable dt = new DataTable();
DataRow dr;
// Create a DataTable.
dt.Columns.Add(new DataColumn("IntegerValue", typeof(Int32)));
dt.Columns.Add(new DataColumn("StringValue", typeof(string)));
dt.Columns.Add(new DataColumn("DateTimeValue", typeof(DateTime)));
// Create sample data.
for (int i = 1; i <= 9; i++)
{
dr = dt.NewRow();
dr[0] = i;
dr[1] = "Item " + i.ToString();
dr[2] = DateTime.Now.ToShortTimeString();
dt.Rows.Add(dr);
}
// Return a DataView to the DataTable.
DataView dv = new DataView(dt);
return dv;
}
void Page_Load(Object sender, EventArgs e)
{
if (!IsPostBack)
BindList();
}
void BindList()
{
DataList1.DataSource = CreateDataSource();
DataList1.DataBind();
}
void DataList_ItemCommand(object sender, DataListCommandEventArgs e)
{
if (((LinkButton)e.CommandSource).CommandName == "select")
DataList1.SelectedIndex = e.Item.ItemIndex;
BindList();
}
</script>
</head>
<body>
<form id="form1" runat="server">
<h3>DataListCommandEventArgs Example</h3>
<asp:DataList id="DataList1"
GridLines="Both"
OnItemCommand="DataList_ItemCommand"
runat="server">
<HeaderTemplate>
Items
</HeaderTemplate>
<ItemTemplate>
<asp:LinkButton id="button1"
Text="Show details"
CommandName="select"
runat="server"/>
<%# DataBinder.Eval(Container.DataItem, "StringValue") %>
</ItemTemplate>
<SelectedItemTemplate>
Item:
<%# DataBinder.Eval(Container.DataItem, "StringValue") %>
<br />
Order Date:
<%# DataBinder.Eval(Container.DataItem, "DateTimeValue", "{0:d}") %>
<br />
Quantity:
<%# DataBinder.Eval(Container.DataItem, "IntegerValue", "{0:N1}") %>
<br />
</SelectedItemTemplate>
</asp:DataList>
</form>
</body>
</html>
<%@ Page Language="VB" AutoEventWireup="True" %>
<%@ Import Namespace="System.Data" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
<head>
<title>DataListCommandEventArgs Example</title>
<script language="VB" runat="server">
Function CreateDataSource() As ICollection
Dim dt As New DataTable()
Dim dr As DataRow
' Create a DataTable.
dt.Columns.Add(New DataColumn("IntegerValue", GetType(Int32)))
dt.Columns.Add(New DataColumn("StringValue", GetType(String)))
dt.Columns.Add(New DataColumn("DateTimeValue", GetType(DateTime)))
' Create sample data.
Dim i As Integer
For i = 1 To 9
dr = dt.NewRow()
dr(0) = i
dr(1) = "Item " & i.ToString()
dr(2) = DateTime.Now.ToShortTimeString()
dt.Rows.Add(dr)
Next i
' Return a DataView to the DataTable.
Dim dv As New DataView(dt)
Return dv
End Function 'CreateDataSource
Sub Page_Load(sender As Object, e As EventArgs)
If Not IsPostBack Then
BindList()
End If
End Sub 'Page_Load
Sub BindList()
DataList1.DataSource = CreateDataSource()
DataList1.DataBind()
End Sub 'BindList
Sub DataList_ItemCommand(sender As Object, e As DataListCommandEventArgs)
If CType(e.CommandSource, LinkButton).CommandName = "select" Then
DataList1.SelectedIndex = e.Item.ItemIndex
End If
BindList()
End Sub 'DataList_ItemCommand
</script>
</head>
<body>
<form id="form1" runat="server">
<h3>DataListCommandEventArgs Example</h3>
<asp:DataList id="DataList1"
GridLines="Both"
OnItemCommand="DataList_ItemCommand"
runat="server">
<HeaderTemplate>
Items
</HeaderTemplate>
<ItemTemplate>
<asp:LinkButton id="button1"
Text="Show details"
CommandName="select"
runat="server"/>
<%# DataBinder.Eval(Container.DataItem, "StringValue") %>
</ItemTemplate>
<SelectedItemTemplate>
Item:
<%# DataBinder.Eval(Container.DataItem, "StringValue") %>
<br />
Order Date:
<%# DataBinder.Eval(Container.DataItem, "DateTimeValue", "{0:d}") %>
<br />
Quantity:
<%# DataBinder.Eval(Container.DataItem, "IntegerValue", "{0:N1}") %>
<br />
</SelectedItemTemplate>
</asp:DataList>
</form>
</body>
</html>
Keterangan
CommandSource Gunakan properti untuk menentukan sumber perintah yang menaikkan peristiwa. Properti ini umumnya digunakan untuk menentukan perintah mana yang menaikkan peristiwa. Anda kemudian dapat mengambil tindakan yang sesuai, berdasarkan perintah .
