Panel.ScrollBars Property

Reference

Definition

Namespace:: System.Web.UI.WebControls

Assembly:: System.Web.dll

Important

Some information relates to prerelease product that may be substantially modified before it’s released. Microsoft makes no warranties, express or implied, with respect to the information provided here.

Gets or sets the visibility and position of scroll bars in a Panel control.

public:
 virtual property System::Web::UI::WebControls::ScrollBars ScrollBars { System::Web::UI::WebControls::ScrollBars get(); void set(System::Web::UI::WebControls::ScrollBars value); };

public virtual System.Web.UI.WebControls.ScrollBars ScrollBars { get; set; }

member this.ScrollBars : System.Web.UI.WebControls.ScrollBars with get, set

Public Overridable Property ScrollBars As ScrollBars

Property Value

ScrollBars

One of the ScrollBars enumeration values. The default is None.

Examples

The following code example demonstrates how to declaratively set the ScrollBars property to Auto. The panel contains a table, the entire contents of which exceed the size of the panel. This causes both vertical and horizontal scroll bars to be automatically displayed when the panel is rendered. The user can then scroll to view all the data in the table.

Poznámka

The following code sample uses the single-file code model and may not work correctly if copied directly into a code-behind file. This code sample must be copied into an empty text file that has an .aspx extension. For more information on the Web Forms code model, see ASP.NET Web Forms Page Code Model.

ASP.NET (C#)

<%@ 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">
    private void Page_Load(object sender, EventArgs e)
    {
        // Add more rows and columns to the table than can
        // be displayed in the panel area.
        // Scroll bars will be required to view all the data.

        // Add rows and columns to the table.
        for (int rowNum = 0; rowNum < 51; rowNum++)
        {
            TableRow tempRow = new TableRow();
            for (int cellNum = 0; cellNum < 11; cellNum++)
            {
                TableCell tempCell = new TableCell();
                tempCell.Text = 
                    String.Format("({0}, {1})", rowNum, cellNum);
                tempRow.Cells.Add(tempCell);
            }
            Table1.Rows.Add(tempRow);
        }
    }
</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
<head id="Head2" runat="server">
    <title>Panel Scrollbars - C# Example</title>
</head>
<body>
    <form id="form1" runat="server">
    <div>

    <h3>Panel.ScrollBars Property Example</h3>        

    <asp:Panel ID="Panel1" runat="Server"
      Height="300px" Width="400px"
      BackColor="Aqua" ScrollBars="Auto">

      <asp:Table ID="Table1" runat="Server"></asp:Table>  

    </asp:Panel>         

    </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">
    Private Sub Page_Load(ByVal sender As Object, _
        ByVal e As System.EventArgs)

        ' Add more rows and columns to the table than can
        ' be displayed in the panel area.
        ' Scroll bars will be required to view all the data.

        ' Add rows and columns to the table.
        Dim rowNum As Integer
        For rowNum = 0 To 50
            Dim tempRow As New TableRow
            Dim cellNum As Integer
            For cellNum = 0 To 10
                Dim tempCell As New TableCell
                tempCell.Text = _
                    String.Format("({0}, {1})", rowNum, cellNum)
                tempRow.Cells.Add(tempCell)
            Next
            Table1.Rows.Add(tempRow)
        Next
    End Sub
</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
<head id="Head2" runat="server">
    <title>Panel Scrollbars - VB.NET Example</title>
</head>
<body>
    <form id="form1" runat="server">
    <div>

    <h3>Panel.ScrollBars Property Example</h3>        

    <asp:Panel ID="Panel1" runat="Server"
      Height="300px" Width="400px"
      BackColor="Aqua" ScrollBars="Auto">

      <asp:Table ID="Table1" runat="Server"></asp:Table>  

    </asp:Panel>         

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

The following code example demonstrates how to programmatically set the ScrollBars property. A ListBox control is populated with the ScrollBars enumeration values. The scroll bars displayed in the panel change, based on the value the user selects from the list box.

Poznámka

ASP.NET (C#)

<%@ 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">
    private void Page_Load(object sender, EventArgs e)
    {
        // Add more rows and columns to the table than can
        // be displayed in the panel area.
        // Scroll bars will be required to view all the data.

        // Add rows and columns to the table.
        for (int rowNum = 0; rowNum < 51; rowNum++)
        {
            TableRow tempRow = new TableRow();
            for (int cellNum = 0; cellNum < 11; cellNum++)
            {
                TableCell tempCell = new TableCell();
                tempCell.Text = 
                    String.Format("({0}, {1})", rowNum, cellNum);
                tempRow.Cells.Add(tempCell);
            }
            Table1.Rows.Add(tempRow);
        }
    }

    private void ListBox1_SelectedIndexChanged(object sender, EventArgs e)
    {
        // Determine which list item was clicked.
        // Display the selected scroll bars in the panel.
        switch (ListBox1.SelectedIndex)
        {
            case 0:
                Panel1.ScrollBars = ScrollBars.None;
                break;
            case 1:
                Panel1.ScrollBars = ScrollBars.Horizontal;
                break;
            case 2:
                Panel1.ScrollBars = ScrollBars.Vertical;
                break;
            case 3:
                Panel1.ScrollBars = ScrollBars.Both;
                break;
            case 4:
                Panel1.ScrollBars = ScrollBars.Auto;
                break;
            default:
                throw new Exception("Select a valid list item.");
        }
    }
</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
<head id="Head2" runat="server">
    <title></title>
</head>
<body>
    <form id="form1" runat="server">
    <div>

    <h3>Panel.ScrollBars Property Example</h3>

    <h4>Select the scrollbars to display in the panel.</h4>
    <asp:ListBox ID="ListBox1" runat="Server"
      Rows="5" AutoPostBack="True"
      SelectionMode="Single"
      OnSelectedIndexChanged="ListBox1_SelectedIndexChanged">
      <asp:ListItem>None</asp:ListItem>
      <asp:ListItem>Horizontal</asp:ListItem> 
      <asp:ListItem>Vertical</asp:ListItem>
      <asp:ListItem>Both</asp:ListItem> 
      <asp:ListItem>Auto</asp:ListItem>              
    </asp:ListBox>

    <hr />              

    <asp:Panel ID="Panel1" runat="Server"
      Height="300px" Width="400px" BackColor="Aqua">
      <asp:Table ID="Table1" runat="Server" />
    </asp:Panel>           
         
    </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">
    Private Sub Page_Load(ByVal sender As Object, _
        ByVal e As System.EventArgs)

        ' Add more rows and columns to the table than can
        ' be displayed in the panel area.
        ' Scroll bars will be required to view all the data.

        ' Add rows and columns to the table.
        Dim i As Integer
        For i = 0 To 50
            Dim tempRow As New TableRow
            Dim j As Integer
            For j = 0 To 10
                Dim tempCell As New TableCell
                tempCell.Text = "(" & i & "," & j & ")"
                tempRow.Cells.Add(tempCell)
            Next j
            Table1.Rows.Add(tempRow)
        Next i
    End Sub

    Sub ListBox1_SelectedIndexChanged(ByVal sender As Object, _
        ByVal e As EventArgs)

        ' Determine which list item was clicked.
        ' Display the selected scroll bars in the panel.
        Select Case (ListBox1.SelectedIndex)
            Case 0
                Panel1.ScrollBars = ScrollBars.None
            Case 1
                Panel1.ScrollBars = ScrollBars.Horizontal
            Case 2
                Panel1.ScrollBars = ScrollBars.Vertical
            Case 3
                Panel1.ScrollBars = ScrollBars.Both
            Case 4
                Panel1.ScrollBars = ScrollBars.Auto
            Case Else
                Throw New Exception("Select a valid list item.")
        End Select

    End Sub
</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
<head id="Head2" runat="server">
    <title></title>
</head>
<body>
    <form id="form1" runat="server">
    <div>

    <h3>Panel.ScrollBars Property Example</h3>

    <h4>Select the scrollbars to display in the panel.</h4>
    <asp:ListBox ID="ListBox1" runat="Server"
      Rows="5" AutoPostBack="True" SelectionMode="Single"
      OnSelectedIndexChanged="ListBox1_SelectedIndexChanged">
      <asp:ListItem>None</asp:ListItem>
      <asp:ListItem>Horizontal</asp:ListItem> 
      <asp:ListItem>Vertical</asp:ListItem>
      <asp:ListItem>Both</asp:ListItem> 
      <asp:ListItem>Auto</asp:ListItem>              
    </asp:ListBox>

    <hr />              

    <asp:Panel ID="Panel1" runat="Server"
      Height="300px" Width="400px" BackColor="Aqua">
      <asp:Table ID="Table1" runat="Server" />
    </asp:Panel>           
         
    </div>
    </form>
</body>
</html>

Remarks

Use the ScrollBars property to specify the visibility and position of scroll bars in a Panel control. This property is set using one of the ScrollBars enumeration values. The following table lists the possible values.

Value	Description
`None`	No scroll bars are shown.
`Horizontal`	Only a horizontal scroll bar is shown.
`Vertical`	Only a vertical scroll bar is shown.
`Both`	Both horizontal and vertical scroll bars are shown.
`Auto`	If necessary, horizontal, vertical, or both scroll bars are shown. Otherwise, no scroll bars are shown.

If you specify Auto for the ScrollBars property, scroll bars are automatically shown when the size of the content in a Panel control exceeds the size of the Panel control itself. For example, if a Panel control contains a table, and the panel is not wide enough to display all the rows in the table, a vertical scroll bar is shown. If the size of the table exceeds the height and width of the panel, both vertical and horizontal scroll bars are shown.

Poznámka

This property is supported only on browsers that support HTML 4.0 or later.

Applies to

Produkt	Verzie
.NET Framework	2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1

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Panel.ScrollBars Property

Definition

Property Value

Examples

Remarks

Applies to

See also

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