TableCellCollection.GetEnumerator Method ()

 

Returns a System.Collections.IEnumerator implemented object that contains all TableCell objects in the TableCellCollection.

Namespace:   System.Web.UI.WebControls
Assembly:  System.Web (in System.Web.dll)

Public Function GetEnumerator As IEnumerator

Return Value

Type: System.Collections.IEnumerator

A System.Collections.IEnumerator implemented object that contains all TableCell objects within the TableCellCollection.

Use this method to create a System.Collections.IEnumerator implemented object that can be iterated through easily to get each item in the TableCellCollection.

Use the IEnumerator.Current property to get the item currently pointed to in the collection.

Use the IEnumerator.MoveNext method to move to the next item in the collection.

Use the IEnumerator.Reset method to move the enumerator back to the initial position.

System_CAPS_noteNote

The IEnumerator.MoveNext method must be called after creating a System.Collections.IEnumerator implemented object or after using the IEnumerator.Reset method to move the enumerator to the first item in the collection. Otherwise, the item represented by the IEnumerator.Current property is undefined.

The following example demonstrates how to use the GetEnumerator method to create a System.Collections.IEnumerator implemented object. It is then iterated through to display the items in the selected row.

<%@ Page Language="VB" %>

<!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)

        Dim numRows As Integer = 5
        Dim numCells As Integer = 6
        Dim counter As Integer = 1
        Dim a_row As New ArrayList()

        ' Create a table.
        Dim rowNum As Integer
        For rowNum = 0 To numRows - 1
            Dim rw As New TableRow()
            Dim cellNum As Integer
            For cellNum = 0 To numCells - 1
                Dim cel As New TableCell()
                cel.Text = counter.ToString()
                rw.Cells.Add(cel)
                counter += 1
            Next
            Table1.Rows.Add(rw)
        Next

        If Not IsPostBack Then

            ' Create a DropDownList for the number of rows.
            For rowNum = 0 To numRows - 1
                a_row.Add(rowNum.ToString())
            Next

            List1.DataSource = a_row
            List1.DataBind()
        End If
    End Sub

    Sub Button_Click(ByVal sender As Object, ByVal e As EventArgs)

        Dim row As Integer = List1.SelectedIndex
        Dim current_cell As TableCell

        ' Create the IEnumerator.
        Dim myEnum As IEnumerator = Table1.Rows(row).Cells.GetEnumerator()

        Label1.Text = "The items in the selected row are: "

        ' Iterate through the IEnumerator and display its contents.
        While myEnum.MoveNext()
            current_cell = CType(myEnum.Current, TableCell)
            Label1.Text = Label1.Text & " " & current_cell.Text
        End While
    End Sub

</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
    <title>Untitled Page</title>
</head>
<body>
    <form id="form1" runat="server">
    <div>

    <h3>TableCellCollection Example</h3>
    <asp:Table id="Table1" runat="server" />
    <br />&nbjsp;<br />
    <p style="text-align:center">
        Select a row:
        <br />&nbjsp;<br />
        Row: <asp:DropDownList id="List1" 
            runat="server"/>

        <br />&nbjsp;<br />
        <asp:Button id="Button1"
             Text="Create IEnumerator"
             OnClick="Button_Click"
             runat="server" />
        <br />&nbjsp;<br />
        <asp:Label id="Label1" runat="server"/>
    </p>

    </div>
    </form>
</body>
</html>

.NET Framework
Available since 1.1
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