TableRowCollection.Clear-Methode
Entfernt alle TableRow-Steuerelemente aus der TableRowCollection.
Namespace: System.Web.UI.WebControls
Assembly: System.Web (in system.web.dll)
Syntax
'Declaration
Public Sub Clear
'Usage
Dim instance As TableRowCollection
instance.Clear
public void Clear ()
public:
virtual void Clear () sealed
public final void Clear ()
public final function Clear ()
Hinweise
Mit dieser Methode können Sie alle TableRow-Objekte aus der TableRowCollection entfernen und die Count-Eigenschaft auf 0 festlegen.
Beispiel
Das folgende Beispiel veranschaulicht, wie mit der Clear-Methode alle TableRow-Objekte aus der TableRowCollection der Tabelle entfernt und durch neue TableRow-Objekte ersetzt werden.
<%@ Page Language="VB" AutoEventWireup="True" %>
<html>
<head>
<script runat="server">
Dim numrows As Integer = 5
Dim numcells As Integer = 6
Dim counter As Integer = 1
Sub Page_Load(sender As Object, e As EventArgs)
' Create a table.
Dim j As Integer
For j = 0 To numrows - 1
Dim r As New TableRow()
Dim i As Integer
For i = 0 To numcells - 1
Dim c As New TableCell()
c.Text = counter.ToString()
counter += 1
r.Cells.Add(c)
Next i
Table1.Rows.Add(r)
Next j
End Sub
Sub Button_Click(sender As Object, e As EventArgs)
' Clear the table.
Table1.Rows.Clear()
' Create a new table.
Dim j As Integer
For j = 0 To numrows - 1
Dim r As New TableRow()
Dim i As Integer
For i = 0 To numcells - 1
Dim c As New TableCell()
c.Text = "***"
r.Cells.Add(c)
Next i
Table1.Rows.Add(r)
Next j
End Sub
</script>
</head>
<body>
<h3>TableCellCollection Example</h3>
<form runat=server>
<asp:Table id="Table1"
runat="server"/>
<br>
<center>
<asp:Button id="Button1"
Text="Replace All Rows With ***"
OnClick="Button_Click"
runat="server"/>
</center>
</form>
</body>
</html>
<%@ Page Language="C#" AutoEventWireup="True" %>
<html>
<head>
<script runat="server">
int numrows = 5;
int numcells = 6;
int counter = 1;
void Page_Load(Object sender, EventArgs e) {
// Create a table.
for (int j=0; j<numrows; j++) {
TableRow r = new TableRow();
for (int i=0; i<numcells; i++) {
TableCell c = new TableCell();
c.Text=counter.ToString();
counter++;
r.Cells.Add(c);
}
Table1.Rows.Add(r);
}
}
void Button_Click(Object sender, EventArgs e) {
// Clear the table.
Table1.Rows.Clear();
// Create a new table.
for (int j=0; j<numrows; j++) {
TableRow r = new TableRow();
for (int i=0; i<numcells; i++) {
TableCell c = new TableCell();
c.Text="***";
r.Cells.Add(c);
}
Table1.Rows.Add(r);
}
}
</script>
</head>
<body>
<h3>TableCellCollection Example</h3>
<form runat=server>
<asp:Table id="Table1"
runat="server"/>
<br>
<center>
<asp:Button id="Button1"
Text="Replace All Rows With ***"
OnClick="Button_Click"
runat="server"/>
</center>
</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
TableRowCollection-Klasse
TableRowCollection-Member
System.Web.UI.WebControls-Namespace
TableRow-Klasse
Count