TableRowCollection.Item[Int32] Egenskap

Definition

Namnområde:
System.Web.UI.WebControls
Sammansättning:
System.Web.dll

Hämtar en TableRow från TableRowCollection vid det angivna indexet.

public:
 property System::Web::UI::WebControls::TableRow ^ default[int] { System::Web::UI::WebControls::TableRow ^ get(int index); };
public System.Web.UI.WebControls.TableRow this[int index] { get; }
member this.Item(int) : System.Web.UI.WebControls.TableRow
Default Public ReadOnly Property Item(index As Integer) As TableRow

Parametrar

index
Int32

Ett ordningstalsindexvärde som anger vilket objekt som TableRow ska returneras. Det här indexet är nollbaserat.

Egenskapsvärde

TableRow

En TableRow som representerar ett element i TableRowCollection.

Exempel

I följande exempel visas hur du använder indexeraren för att hämta en TableRow från en TableRowCollection. Observera att egenskapen Rows för i exemplet Table är en instans av TableRowCollection klassen.

<%@ 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;

        // 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();
                if (cellNum == List2.SelectedIndex)
                    cel.BackColor = System.Drawing.Color.Chartreuse;
                else if (rowNum == List1.SelectedIndex)
                    cel.BackColor = System.Drawing.Color.CadetBlue;
                else
                    cel.BackColor = System.Drawing.Color.White;
                rw.Cells.Add(cel);
                counter++;
            }
            Table1.Rows.Add(rw);
        }

        if (!IsPostBack)
        {
            // Fill a DropDownList with row numbers
            for (int rowNum = 0; rowNum < numRows; rowNum++)
            {
                List1.Items.Add(rowNum.ToString());
            }

            // Fill a DropDownList with column numbers
            for (int cellNum = 0; cellNum < numCells; cellNum++)
            {
                List2.Items.Add(cellNum.ToString());
            }
        }
    }

    void Button_Click(object sender, EventArgs e)
    {
        int rowNum = List1.SelectedIndex;
        TableRow rw = Table1.Rows[rowNum];

        Label1.Text = "The row index of the selected cell is " +
            Table1.Rows.GetRowIndex(rw).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 />
        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" />
    </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 cellNum As Integer
        Dim counter As Integer = 1

        ' Create a table.
        Dim rowNum As Integer
        For rowNum = 0 To numRows - 1
            Dim rw As New TableRow()
            For cellNum = 0 To numCells - 1
                Dim cel As New TableCell()
                cel.Text = counter.ToString()
                If cellNum = List2.SelectedIndex Then
                    cel.BackColor = System.Drawing.Color.Chartreuse
                ElseIf rowNum = List1.SelectedIndex Then
                    cel.BackColor = System.Drawing.Color.CadetBlue
                Else
                    cel.BackColor = System.Drawing.Color.White
                End If
                rw.Cells.Add(cel)
                counter += 1
            Next cellNum
            Table1.Rows.Add(rw)
        Next rowNum
            
        If Not IsPostBack Then
            ' Fill a DropDownList with row numbers
            For rowNum = 0 To numRows - 1
                List1.Items.Add(rowNum.ToString())
            Next rowNum
                
            ' Fill a DropDownList with column numbers
            For cellNum = 0 To numCells - 1
                List2.Items.Add(cellNum.ToString())
            Next cellNum
        End If
    End Sub

    Sub Button_Click(ByVal sender As Object, ByVal e As EventArgs)
        Dim rowNum As Integer = List1.SelectedIndex
        Dim rw As TableRow = Table1.Rows(rowNum)
            
        Label1.Text = "The row index of the selected cell is " & _
            Table1.Rows.GetRowIndex(rw).ToString()
    End Sub
</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 />
        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" />
    </div>
    </form>
</body>
</html>

Kommentarer

Använd den här indexeraren för att hämta en individ TableRow från TableRowCollection det angivna indexet med hjälp av enkel matris notation.

Gäller för

Se även