TableCellCollection.GetCellIndex(TableCell) Metodo
Definizione
Importante
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Restituisce un valore che rappresenta l’indice dell'oggetto TableCell specificato da TableCellCollection.
public:
int GetCellIndex(System::Web::UI::WebControls::TableCell ^ cell);public int GetCellIndex (System.Web.UI.WebControls.TableCell cell);member this.GetCellIndex : System.Web.UI.WebControls.TableCell -> intPublic Function GetCellIndex (cell As TableCell) As IntegerParametri
- cell
- TableCell
Oggetto TableCell di cui ottenere l'indice in TableCellCollection.
Restituisce
L'indice dell'oggetto TableCell specificato all'interno di TableCellCollection. Il valore predefinito è -1, che indica che non è stata trovata nessuna corrispondenza.
Esempio
Nell'esempio seguente viene illustrato come usare la GetCellIndex proprietà per visualizzare l'indice di colonna della cella selezionata.
<%@ 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();
ArrayList a_column = 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 k = 0; k < numrows; k++)
{
a_row.Add(k.ToString());
}
// Create a DropDownList for the number of columns.
for (int l = 0; l < numcells; l++)
{
a_column.Add(l.ToString());
}
List1.DataSource = a_row;
List2.DataSource = a_column;
List1.DataBind();
List2.DataBind();
}
}
void Button_Click(object sender, EventArgs e)
{
int row = List1.SelectedIndex;
int column = List2.SelectedIndex;
TableCell cell = Table1.Rows[row].Cells[column];
Label1.Text = "The column index of the selected cell is " +
Table1.Rows[row].Cells.GetCellIndex(cell).ToString();
}
</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head id="Head1" runat="server">
<title>TableCellCollection Example</title>
</head>
<body>
<form id="form1" runat="server">
<div>
<h3>TableCellCollection Example</h3>
<asp:Table id="Table1" runat="server"/>
<br /> <br />
<p style="text-align:center">
Select a cell:
<br /> <br />
Row: <asp:DropDownList id="List1" runat="server"/>
Column: <asp:DropDownList id="List2" runat="server"/>
<br /> <br />
<asp:Button id="Button1"
Text="Get Index"
OnClick="Button_Click"
runat="server"/>
<br /> <br />
<asp:Label id="Label1" runat="server"/>
</p>
</div>
</form>
</body>
</html>
<%@ 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()
Dim a_column 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
' Create a DropDownList for the number of columns.
Dim cellNum As Integer
For cellNum = 0 To numcells - 1
a_column.Add(cellNum.ToString())
Next
List1.DataSource = a_row
List2.DataSource = a_column
List1.DataBind()
List2.DataBind()
End If
End Sub
Sub Button_Click(ByVal sender As Object, ByVal e As EventArgs)
Dim row As Integer = List1.SelectedIndex
Dim column As Integer = List2.SelectedIndex
Dim cell As TableCell = Table1.Rows(row).Cells(column)
Label1.Text = "The column index of the selected cell is " & _
Table1.Rows(row).Cells.GetCellIndex(cell).ToString()
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 /><br />
<p style="text-align:center">
Select a cell:
<br /> <br />
Row: <asp:DropDownList id="List1" runat="server"/>
Column: <asp:DropDownList id="List2" runat="server"/>
<br /> <br />
<asp:Button id="Button1"
Text="Get Index"
OnClick="Button_Click"
runat="server"/>
<br /> <br />
<asp:Label id="Label1" runat="server"/>
</p>
</div>
</form>
</body>
</html>
Commenti
Usare questo metodo per determinare l'indice dell'oggetto specificato TableCell in TableCellCollection. Se l'oggetto specificato TableCell non viene trovato, viene restituito un indice di -1.