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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 IEnumerator GetEnumerator()

Return Value

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

Implements

IEnumerable.GetEnumerator()

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.

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="C#" %>

<!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)
    {

        int numrows = 5;
        int numcells = 6;
        int counter = 1;
        ArrayList a_row = new ArrayList();

        // Create a table.
        for (int rowNum = 0; rowNum < numrows; rowNum++)
        {
            TableRow rw = new TableRow();
            for (int cellNum = 0; cellNum < numcells; cellNum++)
            {
                TableCell cel = new TableCell();
                cel.Text = counter.ToString();
                rw.Cells.Add(cel);
                counter++;
            }
            Table1.Rows.Add(rw);
        }

        if (!IsPostBack)
        {

            // Create a DropDownList for the number of rows.
            for (int rowNum = 0; rowNum < numrows; rowNum++)
            {
                a_row.Add(rowNum.ToString());
            }

            List1.DataSource = a_row;
            List1.DataBind();

        }
    }

    void Button_Click(object sender, EventArgs e)
    {

        int rowNum = List1.SelectedIndex;
        TableCell current_cell;

        // Create the IEnumerator.
        IEnumerator myEnum = Table1.Rows[rowNum].Cells.GetEnumerator();

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

        // Iterate through the IEnumerator and display its contents.
        while (myEnum.MoveNext())
        {
            current_cell = (TableCell)myEnum.Current;
            Label1.Text = Label1.Text + " " + current_cell.Text;
        }
    }

</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
<head id="Head1" 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

Supported in: 4.6, 4.5, 4, 3.5, 3.0, 2.0, 1.1
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