HtmlSelect.Name-Eigenschaft
Ruft den eindeutigen Bezeichnernamen ab, der dem HtmlSelect-Steuerelement zugeordnet ist, oder legt diesen fest.
Namespace: System.Web.UI.HtmlControls
Assembly: System.Web (in system.web.dll)
Syntax
'Declaration
Public Property Name As String
'Usage
Dim instance As HtmlSelect
Dim value As String
value = instance.Name
instance.Name = value
public string Name { get; set; }
public:
property String^ Name {
String^ get ();
void set (String^ value);
}
/** @property */
public String get_Name ()
/** @property */
public void set_Name (String value)
public function get Name () : String
public function set Name (value : String)
Eigenschaftenwert
Der eindeutige Bezeichnername, der dem HtmlSelect-Steuerelement zugeordnet ist.
Hinweise
Mit der Name-Eigenschaft können Sie den eindeutigen Bezeichnernamen für ein HtmlSelect-Steuerelement bestimmen. In dieser Implementierung gibt der get-Accessor den Wert der Control.UniqueID-Eigenschaft zurück. Der set-Accessor weist dieser Eigenschaft jedoch keinen Wert zu.
Hinweis
Der set-Accessor weist dieser Eigenschaft keinen Wert zu, da die Name-Eigenschaft denselben Wert wie die Control.UniqueID-Eigenschaft aufweisen muss, damit das HtmlSelect-Steuerelement ordnungsgemäß funktioniert.
Beispiel
Im folgenden Codebeispiel wird veranschaulicht, wie Sie mit der Name-Eigenschaft des HtmlSelect-Steuerelements ein bestimmtes Element in der Items-Liste auswählen können.
<%@ Page Language="VB" AutoEventWireup="True" %>
<%@ Import Namespace="System.Data" %>
<html>
<script runat="server" >
Sub Page_Load(sender as Object, e As EventArgs)
' Bind a data source to the Repeater control.
Repeater1.DataSource = CreateRepeaterSource()
Repeater1.DataBind()
End Sub
Sub Item_Bound(sender As Object, e As RepeaterItemEventArgs)
' Each item in the Repeater control contains an HtmlSelect
' control. This method binds a data source to the HtmlSelect
' control as each item in the Repeater control is being
' bound to data.
' The ItemDataBound event is raised when data is bound to an
' item in the Repeater control. Items can include the Header,
' Footer, and so on. Use the following logic only if the item
' being bound is an Item or AlternatingItem.
If (e.Item.ItemType = ListItemType.Item) Or _
(e.Item.ItemType = ListItemType.AlternatingItem) Then
' Bind a data source to the HtmlSelect control.
Dim selectControl As HtmlSelect = _
CType(e.Item.FindControl("Select1"), HtmlSelect)
selectControl.DataSource = CreateHtmlSelectSource()
selectControl.DataBind()
' The runtime automatically generates a unique identifier
' for each control embedded in a list control, such as the
' Repeater. The Name property of the HtmlSelect control
' contains this unique identifier and is commonly used
' to identify a specific control.
' Select the last item in the HtmlSelect control if the Name
' property contains the value "Repeater1:_ctl3:Select1".
If selectControl.Name = "Repeater1:_ctl3:Select1" Then
selectControl.SelectedIndex = selectControl.Items.Count - 1
End If
End If
End Sub
Function CreateHtmlSelectSource() As DataView
' Create a DataTable that contains sample data for the
' HtmlSelect controls.
Dim dt As DataTable = New DataTable()
Dim dr As DataRow
dt.Columns.Add(New DataColumn("Text", GetType(String)))
dt.Columns.Add(New DataColumn("Value", GetType(String)))
' Populate the DataTable with sample values.
Dim i As Integer
For i = 0 To 4
dr = dt.NewRow()
dr(0) = "Item " & i.ToString()
dr(1) = i.ToString()
dt.Rows.Add(dr)
Next i
' Create a DataView from the DataTable.
Dim dv As DataView = New DataView(dt)
Return dv
End Function
Function CreateRepeaterSource() As DataView
' Create a DataTable that contains sample data for the
' Repeater control.
Dim dt As DataTable = New DataTable()
Dim dr As DataRow
dt.Columns.Add(new DataColumn("Category", GetType(String)))
' Populate the DataTable with sample values.
Dim i As Integer
For i = 0 To 4
dr = dt.NewRow()
dr(0) = "Category " & i.ToString()
dt.Rows.Add(dr)
Next i
' Create a DataView from the DataTable.
Dim dv As DataView = new DataView(dt)
return dv
End Function
</script>
<body>
<form runat="server">
<h3> HtmlSelect Name Example </h3>
Notice that Category 3 has a different item selected by default. <br>
<asp:Repeater id="Repeater1"
OnItemDataBound="Item_Bound"
runat="server">
<ItemTemplate>
<h4><%# DataBinder.Eval(Container.DataItem, "Category") %></h4>
Select Item:
<br>
<select id="Select1"
DataTextField="Text"
DataValueField="Value"
runat="server"/>
<br><br>
<hr>
</ItemTemplate>
</asp:Repeater>
</form>
</body>
</html>
<%@ Page Language="C#" AutoEventWireup="True" %>
<%@ Import Namespace="System.Data" %>
<html>
<script runat="server" >
void Page_Load(Object sender, EventArgs e)
{
// Bind a data source to the Repeater control.
Repeater1.DataSource = CreateRepeaterSource();
Repeater1.DataBind();
}
void Item_Bound(Object sender, RepeaterItemEventArgs e)
{
// Each item in the Repeater control contains an HtmlSelect
// control. This method binds a data source to the HtmlSelect
// control as each item in the Repeater control is being
// bound to data.
// The ItemDataBound event is raised when data is bound to an
// item in the Repeater control. Items can include the Header,
// Footer, and so on. Use the following logic only if the item
// being bound is an Item or AlternatingItem.
if (e.Item.ItemType == ListItemType.Item ||
e.Item.ItemType == ListItemType.AlternatingItem)
{
// Bind a data source to the HtmlSelect control.
HtmlSelect selectControl =
(HtmlSelect)e.Item.FindControl("Select1");
selectControl.DataSource = CreateHtmlSelectSource();
selectControl.DataBind();
// The runtime automatically generates a unique identifier
// for each control embedded in a list control, such as the
// Repeater. The Name property of the HtmlSelect control
// contains this unique identifier and is commonly used
// to identify a specific control.
// Select the last item in the HtmlSelect control if the Name
// property contains the value "Repeater1:_ctl3:Select1".
if(selectControl.Name == "Repeater1:_ctl3:Select1")
{
selectControl.SelectedIndex = selectControl.Items.Count - 1;
}
}
}
DataView CreateHtmlSelectSource()
{
// Create a DataTable that contains sample data for the
// HtmlSelect controls.
DataTable dt = new DataTable();
DataRow dr;
dt.Columns.Add(new DataColumn("Text", typeof(String)));
dt.Columns.Add(new DataColumn("Value", typeof(String)));
// Populate the DataTable with sample values.
for (int i = 0; i < 5; i++)
{
dr = dt.NewRow();
dr[0] = "Item " + i.ToString();
dr[1] = i.ToString();
dt.Rows.Add(dr);
}
// Create a DataView from the DataTable.
DataView dv = new DataView(dt);
return dv;
}
DataView CreateRepeaterSource()
{
// Create a DataTable that contains sample data for the
// Repeater control.
DataTable dt = new DataTable();
DataRow dr;
dt.Columns.Add(new DataColumn("Category", typeof(String)));
// Populate the DataTable with sample values.
for (int i = 0; i < 5; i++)
{
dr = dt.NewRow();
dr[0] = "Category " + i.ToString();
dt.Rows.Add(dr);
}
// Create a DataView from the DataTable.
DataView dv = new DataView(dt);
return dv;
}
</script>
<body>
<form runat="server">
<h3> HtmlSelect Name Example </h3>
Notice that Category 3 has a different item selected by default. <br>
<asp:Repeater id="Repeater1"
OnItemDataBound="Item_Bound"
runat="server">
<ItemTemplate>
<h4><%# DataBinder.Eval(Container.DataItem, "Category") %></h4>
Select Item:
<br>
<select id="Select1"
DataTextField="Text"
DataValueField="Value"
runat="server"/>
<br><br>
<hr>
</ItemTemplate>
</asp:Repeater>
</form>
</body>
</html>
Plattformen
Windows 98, Windows 2000 SP4, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition
.NET Framework unterstützt nicht alle Versionen sämtlicher Plattformen. Eine Liste der unterstützten Versionen finden Sie unter Systemanforderungen.
Versionsinformationen
.NET Framework
Unterstützt in: 2.0, 1.1, 1.0
Siehe auch
Referenz
HtmlSelect-Klasse
HtmlSelect-Member
System.Web.UI.HtmlControls-Namespace
Control.UniqueID
HtmlSelect.Items-Eigenschaft