TableCellCollection.GetCellIndex(TableCell) Metodo

Definizione

Restituisce un valore che rappresenta l’indice dell'oggetto TableCell specificato da TableCellCollection.Returns a value that represents the index of the specified TableCell from the 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 -> int
Public Function GetCellIndex (cell As TableCell) As Integer

Parametri

cell
TableCell

Oggetto TableCell di cui ottenere l'indice in TableCellCollection.The TableCell to get the index of in the TableCellCollection.

Restituisce

L'indice dell'oggetto TableCell specificato all'interno di TableCellCollection.The index of the specified TableCell within the TableCellCollection. Il valore predefinito è -1, che indica che non è stata trovata nessuna corrispondenza.The default is -1, which indicates that a match has not been found.

Esempi

Nell'esempio seguente viene illustrato come utilizzare la GetCellIndex proprietà per visualizzare l'indice di colonna della cella selezionata.The following example demonstrates how to use the GetCellIndex property to display the column index of the selected cell.

<%@ 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 />&nbsp;<br />
    <p style="text-align:center">
        Select a cell:
        <br />&nbsp;<br />
        Row: <asp:DropDownList id="List1" runat="server"/>
        Column: <asp:DropDownList id="List2" runat="server"/>
        <br />&nbsp;<br />
        <asp:Button id="Button1"
             Text="Get Index"
             OnClick="Button_Click"
             runat="server"/>
        <br />&nbsp;<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 />&nbsp;<br />
        Row: <asp:DropDownList id="List1" runat="server"/>
        Column: <asp:DropDownList id="List2" runat="server"/>
        <br />&nbsp;<br />
        <asp:Button id="Button1"
             Text="Get Index"
             OnClick="Button_Click"
             runat="server"/>
        <br />&nbsp;<br />
        <asp:Label id="Label1" runat="server"/>
    </p>

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

Commenti

Utilizzare questo metodo per determinare l'indice dell'oggetto specificato TableCell TableCellCollectionin.Use this method to determine the index of the specified TableCell in the TableCellCollection. Se l'oggetto TableCell specificato non viene trovato, viene restituito un indice di-1.If the specified TableCell is not found, an index of -1 is returned.

Si applica a

Vedi anche