ListViewCommandEventArgs.Item Eigenschaft
Definition
Wichtig
Einige Informationen beziehen sich auf Vorabversionen, die vor dem Release ggf. grundlegend überarbeitet werden. Microsoft übernimmt hinsichtlich der hier bereitgestellten Informationen keine Gewährleistungen, seien sie ausdrücklich oder konkludent.
Ruft das Datenelement ab, für das der Befehl ausgegeben wurde.
public:
property System::Web::UI::WebControls::ListViewItem ^ Item { System::Web::UI::WebControls::ListViewItem ^ get(); };
public System.Web.UI.WebControls.ListViewItem Item { get; }
member this.Item : System.Web.UI.WebControls.ListViewItem
Public ReadOnly Property Item As ListViewItem
Eigenschaftswert
Das Datenelement vom ListView-Steuerelement, für das der Befehl ausgegeben wurde.
Beispiele
Im folgenden Beispiel wird gezeigt, wie das ListViewCommandEventArgs -Objekt verwendet wird, das an den Ereignishandler übergeben wird.
<%@ 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">
protected void EmployeesListView_OnItemCommand(object sender, ListViewCommandEventArgs e)
{
if (String.Equals(e.CommandName, "AddToList"))
{
// Verify that the employee ID is not already in the list. If not, add the
// employee to the list.
ListViewDataItem dataItem = (ListViewDataItem)e.Item;
string employeeID =
EmployeesListView.DataKeys[dataItem.DisplayIndex].Value.ToString();
if (SelectedEmployeesListBox.Items.FindByValue(employeeID) == null)
{
ListItem item = new ListItem(e.CommandArgument.ToString(), employeeID);
SelectedEmployeesListBox.Items.Add(item);
}
}
}
</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head id="Head1" runat="server">
<title>Employee List</title>
</head>
<body>
<form id="form1" runat="server">
<asp:ListView runat="server"
ID="EmployeesListView"
OnItemCommand="EmployeesListView_OnItemCommand"
DataSourceID="EmployeesDataSource"
DataKeyNames="EmployeeID">
<LayoutTemplate>
<table runat="server" id="tblEmployees"
cellspacing="0" cellpadding="1" width="440px" border="1">
<tr id="itemPlaceholder" runat="server"></tr>
</table>
<asp:DataPager ID="EmployeesDataPager" runat="server" PageSize="10">
<Fields>
<asp:NumericPagerField />
</Fields>
</asp:DataPager>
</LayoutTemplate>
<ItemTemplate>
<tr runat="server">
<td>
<asp:Label runat="server" ID="NameLabel"
Text='<%#Eval("LastName") + ", " + Eval("FirstName") %>' />
</td>
<td style="width:80px">
<asp:LinkButton runat="server"
ID="SelectEmployeeButton"
Text="Add To List"
CommandName="AddToList"
CommandArgument='<%#Eval("LastName") + ", " + Eval("FirstName") %>' />
</td>
</tr>
</ItemTemplate>
</asp:ListView>
<br /><br />
<b>Selected Employees:</b><br />
<asp:ListBox runat="server" ID="SelectedEmployeesListBox" Rows="10" Width="300px" />
<!-- This example uses Microsoft SQL Server and connects -->
<!-- to the AdventureWorks sample database. Use an ASP.NET -->
<!-- expression to retrieve the connection string value -->
<!-- from the Web.config file. -->
<asp:SqlDataSource ID="EmployeesDataSource" runat="server"
ConnectionString="<%$ ConnectionStrings:AdventureWorks_DataConnectionString %>"
SelectCommand="SELECT [EmployeeID], [FirstName], [LastName]
FROM HumanResources.vEmployee
ORDER BY [LastName], [FirstName], [EmployeeID]">
</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">
Protected Sub EmployeesListView_OnItemCommand(ByVal sender As Object, _
ByVal e As ListViewCommandEventArgs)
If String.Equals(e.CommandName, "AddToList") Then
' Verify that the employee ID is not already in the list. If not, add the
' employee to the list.
Dim dataItem As ListViewDataItem = CType(e.Item, ListViewDataItem)
Dim employeeID As String = _
EmployeesListView.DataKeys(dataItem.DisplayIndex).Value.ToString()
If SelectedEmployeesListBox.Items.FindByValue(employeeID) Is Nothing Then
Dim item As ListItem = _
New ListItem(e.CommandArgument.ToString(), employeeID)
SelectedEmployeesListBox.Items.Add(item)
End If
End If
End Sub
</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head id="Head2" runat="server">
<title>Employee List</title>
</head>
<body>
<form id="form1" runat="server">
<asp:ListView runat="server"
ID="EmployeesListView"
OnItemCommand="EmployeesListView_OnItemCommand"
DataSourceID="EmployeesDataSource"
DataKeyNames="EmployeeID">
<LayoutTemplate>
<table runat="server" id="tblEmployees"
cellspacing="0" cellpadding="1" width="440px" border="1">
<tr id="itemPlaceholder" runat="server"></tr>
</table>
<asp:DataPager ID="EmployeesDataPager" runat="server" PageSize="10">
<Fields>
<asp:NumericPagerField />
</Fields>
</asp:DataPager>
</LayoutTemplate>
<ItemTemplate>
<tr runat="server">
<td>
<asp:Label runat="server" ID="NameLabel"
Text='<%#Eval("LastName") & ", " & Eval("FirstName") %>' />
</td>
<td style="width:80px">
<asp:LinkButton runat="server"
ID="SelectEmployeeButton"
Text="Add To List"
CommandName="AddToList"
CommandArgument='<%#Eval("LastName") & ", " & Eval("FirstName") %>' />
</td>
</tr>
</ItemTemplate>
</asp:ListView>
<br /><br />
<b>Selected Employees:</b><br />
<asp:ListBox runat="server" ID="SelectedEmployeesListBox" Rows="10" Width="300px" />
<!-- This example uses Microsoft SQL Server and connects -->
<!-- to the AdventureWorks sample database. Use an ASP.NET -->
<!-- expression to retrieve the connection string value -->
<!-- from the Web.config file. -->
<asp:SqlDataSource ID="EmployeesDataSource" runat="server"
ConnectionString="<%$ ConnectionStrings:AdventureWorks_DataConnectionString %>"
SelectCommand="SELECT [EmployeeID], [FirstName], [LastName]
FROM HumanResources.vEmployee
ORDER BY [LastName], [FirstName], [EmployeeID]">
</asp:SqlDataSource>
</form>
</body>
</html>
Gilt für:
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