DetailsView.ItemCommand Událost
Definice
Důležité
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Nastane při kliknutí na tlačítko v ovládacím DetailsView prvku.
public:
event System::Web::UI::WebControls::DetailsViewCommandEventHandler ^ ItemCommand;public event System.Web.UI.WebControls.DetailsViewCommandEventHandler ItemCommand;member this.ItemCommand : System.Web.UI.WebControls.DetailsViewCommandEventHandler Public Custom Event ItemCommand As DetailsViewCommandEventHandler Event Type
Příklady
Následující příklad kódu ukazuje, jak pomocí ItemCommand události zpracovat tlačítko kliknutí v ovládacím DetailsView prvku. Když uživatel klikne na tlačítko Přidat kontakt, položka se přidá do ListBox ovládacího prvku.
<%@ 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_ItemCommand(Object sender, DetailsViewCommandEventArgs e)
{
// Use the CommandName property to determine which button
// was clicked.
if (e.CommandName == "Add")
{
// Add the current store to the contact list.
// Get the row that contains the store name. In this
// example, the store name is in the second row (index 1)
// of the DetailsView control.
DetailsViewRow row = CustomerDetailView.Rows[1];
// Get the store's name from the appropriate cell.
// In this example, the store name is in the second cell
// (index 1) of the row.
String name = row.Cells[1].Text;
// Create a ListItem object with the store's name.
ListItem item = new ListItem(name);
// Add the ListItem object to the ListBox, if the
// item doesn't already exist.
if (!ContactListBox.Items.Contains(item))
{
ContactListBox.Items.Add(item);
}
}
}
</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>
DetailsView ItemCommand Example</title>
</head>
<body>
<form id="Form1" runat="server">
<h3>
DetailsView ItemCommand Example</h3>
<asp:DetailsView ID="CustomerDetailView"
DataSourceID="DetailsViewSource"
AutoGenerateRows="false"
DataKeyNames="CustomerID"
AllowPaging="true"
OnItemCommand="CustomerDetailView_ItemCommand"
runat="server">
<FieldHeaderStyle BackColor="Navy" ForeColor="White" />
<Fields>
<asp:BoundField DataField="CustomerID" HeaderText="Store ID" />
<asp:BoundField DataField="CompanyName" HeaderText="Store Name" />
<asp:BoundField DataField="City" HeaderText="City" />
<asp:ButtonField CommandName="Add" Text="Add Contact" />
</Fields>
</asp:DetailsView>
<hr />
Contacts:<br />
<asp:ListBox ID="ContactListBox" 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" 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]">
</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_ItemCommand(ByVal sender As Object, ByVal e As DetailsViewCommandEventArgs)
' Use the CommandName property to determine which button
' was clicked.
If e.CommandName = "Add" Then
' Add the current store to the contact list.
' Get the row that contains the store name. In this
' example, the store name is in the second row (index 1)
' of the DetailsView control.
Dim row As DetailsViewRow = CustomerDetailView.Rows(1)
' Get the store's name from the appropriate cell.
' In this example, the store name is in the second cell
' (index 1) of the row.
Dim name As String = row.Cells(1).Text
' Create a ListItem object with the store's name.
Dim item As New ListItem(name)
' Add the ListItem object to the ListBox, if the
' item doesn't already exist.
If Not ContactListBox.Items.Contains(item) Then
ContactListBox.Items.Add(item)
End If
End If
End Sub
</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>
DetailsView ItemCommand Example</title>
</head>
<body>
<form id="Form1" runat="server">
<h3>
DetailsView ItemCommand Example</h3>
<asp:DetailsView ID="CustomerDetailView"
DataSourceID="DetailsViewSource"
AutoGenerateRows="false"
DataKeyNames="CustomerID"
AllowPaging="true"
OnItemCommand="CustomerDetailView_ItemCommand"
runat="server">
<FieldHeaderStyle BackColor="Navy" ForeColor="White" />
<Fields>
<asp:BoundField DataField="CustomerID" HeaderText="Store ID" />
<asp:BoundField DataField="CompanyName" HeaderText="Store Name" />
<asp:BoundField DataField="City" HeaderText="City" />
<asp:ButtonField CommandName="Add" Text="Add Contact" />
</Fields>
</asp:DetailsView>
<hr />
Contacts:<br />
<asp:ListBox ID="ContactListBox" 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" 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]">
</asp:SqlDataSource>
</form>
</body>
</html>
Poznámky
Událost ItemCommand se vyvolá při kliknutí na tlačítko v ovládacím DetailsView prvku. To vám umožní poskytnout obslužnou rutinu události, která provádí vlastní rutinu při každé výskytu této události.
DetailsViewCommandEventArgs Objekt se předá obslužné rutině události, která umožňuje určit název příkazu a argument příkazu kliknutí na tlačítko. K určení indexu aktuálního záznamu PageIndex použijte vlastnost.
Další informace o zpracování událostí naleznete v tématu Zpracování a vyvolávání událostí.
