TableCellCollection.Item-Eigenschaft
Ruft TableCell am angegebenen Index aus TableCellCollection ab.
Namespace: System.Web.UI.WebControls
Assembly: System.Web (in system.web.dll)
Syntax
'Declaration
Public ReadOnly Default Property Item ( _
index As Integer _
) As TableCell
'Usage
Dim instance As TableCellCollection
Dim index As Integer
Dim value As TableCell
value = instance(index)
public TableCell this [
int index
] { get; }
public:
property TableCell^ default [int] {
TableCell^ get (int index);
}
/** @property */
public TableCell get_Item (int index)
JScript unterstützt die Verwendung von indizierten Eigenschaften, aber nicht die Deklaration von neuen indizierten Eigenschaften.
Parameter
- index
Ein Ordinalindexwert, der angibt, welche TableCell zurückgegeben werden soll.
Eigenschaftenwert
Eine TableCell, die ein Element in TableCellCollection darstellt.
Hinweise
Mit diesem Indexer können Sie eine einzelne TableCell mithilfe einfacher Arraynotation am angegebenen Index in TableCellCollection abrufen.
Beispiel
Das folgende Beispiel veranschaulicht, wie mit dem Indexer eine TableCell aus TableCellCollection abgerufen wird. Beachten Sie, dass die Cells-Eigenschaft von TableRow in diesem Beispiel eine Instanz der TableCellCollection-Klasse ist.
<%@ Page Language="VB" AutoEventWireup="True" %>
<html>
<head>
<script runat="server">
Sub Page_Load(sender As Object, e As EventArgs)
Dim numrows As Integer = 5
Dim numcells As Integer = 6
Dim counter As Integer = 1
Dim a_row As New ArrayList()
Dim a_column As New ArrayList()
' 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()
r.Cells.Add(c)
counter += 1
Next i
Table1.Rows.Add(r)
Next j
If Not IsPostBack Then
' Create a DropDownList for the number of columns.
Dim l As Integer
For l = 0 To numcells - 1
a_column.Add(l.ToString())
Next l
' Create a DropDownList for the number of rows.
Dim k As Integer
For k = 0 To numrows - 1
a_row.Add(k.ToString())
Next k
List1.DataSource = a_column
List2.DataSource = a_row
List1.DataBind()
List2.DataBind()
End If
End Sub
Sub Button_Click(sender As Object, e As EventArgs)
Dim column As Integer = List1.SelectedIndex
Dim row As Integer = List2.SelectedIndex
Label1.Text = "The cell (" & column.ToString() & ", " & _
row.ToString() & ") contains the value " & _
Table1.Rows(row).Cells(column).Text & "."
End Sub
</script>
</head>
<body>
<h3>TableCellCollection Example</h3>
<form runat=server>
<asp:Table id="Table1"
runat="server"/>
<br><br>
<center>
Column:
<asp:DropDownList id="List1"
runat="server"/>
Row:
<asp:DropDownList id="List2"
runat="server"/>
<br><br>
<asp:Button id="Button1"
Text="Display Cell"
OnClick="Button_Click"
runat="server"/>
<br><br>
<asp:Label id="Label1"
runat="server"/>
</center>
</form>
</body>
</html>
<%@ Page Language="C#" AutoEventWireup="True" %>
<html>
<head>
<script runat="server">
void Page_Load(Object sender, EventArgs e)
{
int numrows = 5;
int numcells = 6;
int counter = 1;
ArrayList a_row = new ArrayList();
ArrayList a_column = new ArrayList();
// 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();
r.Cells.Add(c);
counter++;
}
Table1.Rows.Add(r);
}
if (!IsPostBack) {
// Create a DropDownList for the number of columns.
for (int l=0; l<numcells; l++)
{
a_column.Add(l.ToString());
}
// Create a DropDownList for the number of rows.
for (int k=0; k<numrows; k++)
{
a_row.Add(k.ToString());
}
List1.DataSource=a_column;
List2.DataSource=a_row;
List1.DataBind();
List2.DataBind();
}
}
void Button_Click(object sender, EventArgs e)
{
int column = List1.SelectedIndex;
int row = List2.SelectedIndex;
Label1.Text="The cell (" + column.ToString() + ", " + row.ToString() +
") contains the value " +
Table1.Rows[row].Cells[column].Text + ".";
}
</script>
</head>
<body>
<h3>TableCellCollection Example</h3>
<form runat=server>
<asp:Table id="Table1"
runat="server"/>
<br><br>
<center>
Column:
<asp:DropDownList id="List1"
runat="server"/>
Row:
<asp:DropDownList id="List2"
runat="server"/>
<br><br>
<asp:Button id="Button1"
Text="Display Cell"
OnClick="Button_Click"
runat="server"/>
<br><br>
<asp:Label id="Label1"
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
TableCellCollection-Klasse
TableCellCollection-Member
System.Web.UI.WebControls-Namespace
TableCell-Klasse
TableRow
Cells