HtmlTextArea.Name Egenskap
Definition
Viktigt
En del information gäller för förhandsversionen av en produkt och kan komma att ändras avsevärt innan produkten blir allmänt tillgänglig. Microsoft lämnar inga garantier, uttryckliga eller underförstådda, avseende informationen som visas här.
Hämtar eller anger det unika identifierarnamnet för HtmlTextArea kontrollen.
public:
virtual property System::String ^ Name { System::String ^ get(); void set(System::String ^ value); };public virtual string Name { get; set; }member this.Name : string with get, setPublic Overridable Property Name As StringEgenskapsvärde
En sträng som representerar värdet för UniqueID egenskapen.
Exempel
Följande kodexempel visar hur du använder Name egenskapen för att välja en HtmlTextArea kontroll på en sida och ange dess Value egenskap.
<%@ 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>
<%@ 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>
Kommentarer
Använd egenskapen Name för att fastställa kontrollens unika identifierarnamn HtmlTextArea . I den här implementeringen av egenskapen get returnerar accessorn värdet för Control.UniqueID egenskapen. Accessorn tilldelar dock set inte något värde till den här egenskapen.
Note
Accessorn set tilldelar inte något värde till den Name här egenskapen eftersom egenskapen måste ha samma värde som Control.UniqueID egenskapen för HtmlTextArea att kontrollen ska fungera korrekt.
Klasser som ärver från HtmlTextArea klassen kan åsidosätta den här implementeringen om det behövs.