使用GetEnumerator创建IEnumerator
本文介绍了一个使用GetEnumerator方法创建实现了System.Collections.IEnumerator接口的对象的例子。通过循环遍历此对象，可以展示表格中选定行的各项元素。
示例说明如何使用 GetEnumerator 方法创建一个实现了 System.Collections.IEnumerator 的对象。然后循环访问该对象以显示选定行中的项。view plaincopy to clipboardprint?<%@ 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(); // 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 rows. for (int k=0; k<numrows; k++) { a_row.Add(k.ToString()); } List1.DataSource=a_row; List1.DataBind(); } 
} void Button_Click(object sender, EventArgs e) { int row = List1.SelectedIndex; TableCell current_cell; // Create the IEnumerator. IEnumerator myEnum = 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 = (TableCell)myEnum.Current; Label1.Text = Label1.Text + " " + current_cell.Text; } } </SCRIPT> <H3>TableCellCollection Example</H3> <FORM runat="server"> <ASP:TABLE id=Table1 runat="server" /> <BR><BR> <CENTER> Select a row: <BR><BR> Row: <ASP:DROPDOWNLIST id=List1 runat="server" /> <BR><BR> <ASP:BUTTON id=Button1 onclick=Button_Click runat="server" Text="Create IEnumerator" /> <BR><BR> <ASP:LABEL id=Label1 runat="server" /> </CENTER> </FORM> 
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