HtmlTextArea.Name プロパティ
HtmlTextArea コントロールの一意の識別名を取得または設定します。
名前空間: System.Web.UI.HtmlControls
アセンブリ: System.Web (system.web.dll 内)
構文
'宣言
Public Overridable Property Name As String
'使用
Dim instance As HtmlTextArea
Dim value As String
value = instance.Name
instance.Name = value
public virtual string Name { get; set; }
public:
virtual 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)
適用できません。
プロパティ値
Control.UniqueID プロパティの値を表す文字列。
解説
Name プロパティを使用して、HtmlTextArea コントロールの一意の識別名を確認します。プロパティのこの実装では、get アクセサは Control.UniqueID プロパティの値を返します。ただし、set アクセサはこのプロパティに値を代入しません。
メモ : |
---|
set アクセサがこのプロパティに値を代入しません。Name プロパティと Control.UniqueID プロパティが同じ値を持っていないと、HtmlTextArea コントロールが正しく動作しないためです。 |
HtmlTextArea クラスから継承するクラスは、必要に応じてこの実装をオーバーライドできます。
使用例
Name プロパティを使用してページの HtmlTextArea コントロールを選択し、その Value プロパティを設定する方法を次のコード例に示します。
<%@ 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">
<script runat="server" >
Sub Page_Load(ByVal sender As Object, ByVal e As EventArgs)
' Bind a data source to the Repeater control.
Repeater1.DataSource = CreateRepeaterSource()
Repeater1.DataBind()
End Sub
Sub Item_Bound(ByVal sender As Object, ByVal e As RepeaterItemEventArgs)
' 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
' The runtime automatically generates a unique identifier
' for each control embedded in a list control, such as the
' Repeater control. The Name property of the HtmlTextArea
' control contains this unique identifier and is commonly used to
' identify a specific control.
' Retrieve the HtmlTextArea control from the RepeaterItem.
Dim area As HtmlTextArea = _
CType(e.Item.FindControl("TextArea1"), HtmlTextArea)
' Insert a custom message for the fourth HtmlTextArea control by
' looking for a Name property that contains the number 3.
If area.Name.Contains("3") Then
area.Value = "Hello World"
End If
End If
End Sub
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>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head>
<title>HtmlTextArea Name Example</title>
</head>
<body>
<form id="form1" runat="server">
<h3>HtmlTextArea Name Example</h3>
Notice that Category 3 has custom text. <br />
<asp:Repeater id="Repeater1"
onitemdatabound="Item_Bound"
runat="server">
<ItemTemplate>
<h4><%# DataBinder.Eval(Container.DataItem, "Category") %></h4>
Enter text:
<br />
<textarea rows="2" cols="20" id="TextArea1"
runat="server"/>
<br /><br />
<hr />
</ItemTemplate>
</asp:Repeater>
</form>
</body>
</html>
<%@ 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">
<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)
{
// 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)
{
// The runtime automatically generates a unique identifier
// for each control embedded in a list control, such as the
// Repeater control. The Name property of the HtmlTextArea
// control contains this unique identifier and is commonly used to
// identify a specific control.
// Retrieve the HtmlTextArea control from the RepeaterItem.
HtmlTextArea area = (HtmlTextArea)e.Item.FindControl("TextArea1");
// Insert a custom message for the fourth HtmlTextArea control by
// looking for a Name property that contains the number 3.
if (area.Name.Contains("3"))
{
area.Value = "Hello World";
}
}
}
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>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head>
<title>HtmlTextArea Name Example</title>
</head>
<body>
<form id="form1" runat="server">
<h3>HtmlTextArea Name Example</h3>
Notice that Category 3 has custom text. <br />
<asp:Repeater id="Repeater1"
onitemdatabound="Item_Bound"
runat="server">
<ItemTemplate>
<h4><%# DataBinder.Eval(Container.DataItem, "Category") %></h4>
Enter text:
<br />
<textarea rows="2" cols="20" id="TextArea1"
runat="server"/>
<br /><br />
<hr />
</ItemTemplate>
</asp:Repeater>
</form>
</body>
</html>
プラットフォーム
Windows 98,Windows Server 2000 SP4,Windows CE,Windows Millennium Edition,Windows Mobile for Pocket PC,Windows Mobile for Smartphone,Windows Server 2003,Windows XP Media Center Edition,Windows XP Professional x64 Edition,Windows XP SP2,Windows XP Starter Edition
Microsoft .NET Framework 3.0 は Windows Vista,Microsoft Windows XP SP2,および Windows Server 2003 SP1 でサポートされています。
バージョン情報
.NET Framework
サポート対象 : 3.0,2.0,1.1,1.0
参照
関連項目
HtmlTextArea クラス
HtmlTextArea メンバ
System.Web.UI.HtmlControls 名前空間
Control.UniqueID