BorderWidth Property

WebControl.BorderWidth Property

Gets or sets the border width of the Web server control.

[Visual Basic]
Public Overridable Property BorderWidth As Unit
[C#]
public virtual Unit BorderWidth {get; set;}
[C++]
public: __property virtual Unit get_BorderWidth();
public: __property virtual void set_BorderWidth(Unit);
[JScript]
public function get BorderWidth() : Unit;
public function set BorderWidth(Unit);

Property Value

A Unit that represents the border width of a Web server control. The default value is Unit.Empty, which indicates that this property is not set.

Exceptions

Exception Type Condition
ArgumentException The specified border width is a negative value.

Remarks

Use the BorderWidth property to specify a border width for a control.

Note   This property does not work with all Web server controls. It applies only to controls that display as a table, such as Table and DataGrid.

This property is set with a Unit object. If the Value property of the Unit contains a negative number, an exception is thrown.

Note   The border width can be expressed only in pixels for browsers earlier than Microsoft Internet Explorer version 5. All unit types are supported in Microsoft Internet Explorer version 5 and later. Refer to the specific control for details.

Example

[Visual Basic, C#, JScript] The following example illustrates how to set the BorderWidth property of the Table control, inherited from the WebControl base class.

[Visual Basic] 
<%@ Page Language="VB" AutoEventWireup="True" %>
<html>
 <body>
     <h3>BorderWidth Property of a Web Control</h3>
 
 <form runat=server>
 
 <asp:Table id="Table1" runat="server"
    CellPadding=10 
    GridLines="Both"
    
    BorderWidth=10
 >
 
    <asp:TableRow>
       <asp:TableCell>
          Row 0, Col 0
       </asp:TableCell>
 
       <asp:TableCell>
          Row 0, Col 1
       </asp:TableCell>
    </asp:TableRow>
 
    <asp:TableRow>
       <asp:TableCell>
          Row 1, Col 0
       </asp:TableCell>
 
       <asp:TableCell>
          Row 1, Col 1
       </asp:TableCell>
    </asp:TableRow>
 
 </asp:Table>
 
 </form>
 
 </body>
 </html>
 

[C#] 
<%@ Page Language="C#" AutoEventWireup="True" %>
<html>
 <body>
     <h3>BorderWidth Property of a Web Control</h3>
 
 <form runat=server>
 
 <asp:Table id="Table1" runat="server"
    CellPadding=10 
    GridLines="Both"
    
    BorderWidth=10
 >
 
    <asp:TableRow>
       <asp:TableCell>
          Row 0, Col 0
       </asp:TableCell>
 
       <asp:TableCell>
          Row 0, Col 1
       </asp:TableCell>
    </asp:TableRow>
 
    <asp:TableRow>
       <asp:TableCell>
          Row 1, Col 0
       </asp:TableCell>
 
       <asp:TableCell>
          Row 1, Col 1
       </asp:TableCell>
    </asp:TableRow>
 
 </asp:Table>
 
 </form>
 
 </body>
 </html>
 

[JScript] 
<%@ Page Language="JScript" AutoEventWireup="True" %>
<html>
 <body>
     <h3>BorderWidth Property of a Web Control</h3>
 
 <form runat=server>
 
 <asp:Table id="Table1" runat="server"
    CellPadding=10 
    GridLines="Both"
    
    BorderWidth=10
 >
 
    <asp:TableRow>
       <asp:TableCell>
          Row 0, Col 0
       </asp:TableCell>
 
       <asp:TableCell>
          Row 0, Col 1
       </asp:TableCell>
    </asp:TableRow>
 
    <asp:TableRow>
       <asp:TableCell>
          Row 1, Col 0
       </asp:TableCell>
 
       <asp:TableCell>
          Row 1, Col 1
       </asp:TableCell>
    </asp:TableRow>
 
 </asp:Table>
 
 </form>
 
 </body>
 </html>
 

[Visual Basic] 
<!-- This example demonstrates how to set property values for the
BorderColor, BorderStyle, and BorderWidth properties, and how to 
change the property values at run time. -->

    . . . 
<%@ Page language="VB" AutoEventWireup="true" %>
<%@ Import Namespace="System.Drawing" %>

<HTML>
    <HEAD>
        <SCRIPT runat="server">
            Private Sub Page_Load(sender As Object, e As System.EventArgs)
                ' Determine whether this is the first time the page is loaded;
                ' if so, load the drop-down lists with data.
                If Not Page.IsPostBack Then
                    ' Create a ListItemCollection and add names of colors.
                    Dim colors As New ListItemCollection()
                    colors.Add(Color.Black.Name)
                    colors.Add(Color.Blue.Name)
                    colors.Add(Color.Green.Name)
                    colors.Add(Color.Orange.Name)
                    colors.Add(Color.Purple.Name)
                    colors.Add(Color.Red.Name)
                    colors.Add(Color.White.Name)
                    colors.Add(Color.Yellow.Name)
                    ' Bind the colors collection to the borderColorList.
                    borderColorList.DataSource = colors
                    borderColorList.DataBind()

                    ' Create a ListItemCollection and the add names of 
                    ' the BorderStyle enumeration values.
                    Dim styles As New ListItemCollection()
                    Dim styleType As Type = GetType(BorderStyle)

                    Dim s As String
                    For Each s In  [Enum].GetNames(styleType)
                        styles.Add(s)
                    Next s

                    ' Bind the styles collection to the borderStyleList.
                    borderStyleList.DataSource = styles
                    borderStyleList.DataBind()

                    ' Create a ListItemCollection and add width values
                    ' expressed in pixels (px).
                    Dim widths As New ListItemCollection()

                    Dim i As Integer
                    For i = 0 To 10
                        widths.Add(i.ToString() & "px")
                    Next i

                    ' Bind the widths collection to the borderWidthList.
                    borderWidthList.DataSource = widths
                    borderWidthList.DataBind()
                End If
            End Sub

            ' This method handles the SelectedIndexChanged event for borderColorList.
            Public Sub ChangeBorderColor(sender As Object, e As System.EventArgs)
                ' Convert the color name string to an object of type Color, 
                ' and set the Color as the new border color for Label1.
                Label1.BorderColor = Color.FromName(borderColorList.SelectedItem.Text)
            End Sub

            ' This method handles the selectedIndexChanged event for boderStyleList.
            Public Sub ChangeBorderStyle(sender As Object, e As System.EventArgs)
                ' Convert the style name string to a BorderStyle enumeration value,
                ' and set the BorderStyle as the new border style for Label1.
                Dim styleType As Type = GetType(BorderStyle)
                Label1.BorderStyle = [Enum].Parse(styleType, borderStyleList.SelectedItem.Text)
            End Sub

            ' This method handles the SelectedIndexChanged event for borderWidthList.
            Public Sub ChangeBorderWidth(sender As Object, e As System.EventArgs)
                ' Convert the border width string to a object of type Unit,
                ' and set the Unit as the new border width for Label1.
                Label1.BorderWidth = Unit.Parse(borderWidthList.SelectedItem.Text)
            End Sub
    </SCRIPT>
    </HEAD>

    <BODY>
        <form runat="server">

            <h3> Border Properties Example </h3>

            <table border="0" cellpadding="6">
                <tr>
                    <td>
                        <asp:Label Runat="server" BorderColor="Black" 
                            BorderStyle="Solid" BorderWidth="4px" ID="Label1" 
                            Text="Border Properties Example" Height="75" 
                            Width="200"><center><br>Border Properties Example
                            </center></asp:Label>
                    </td>

                    <td>
                        <asp:DropDownList Runat="server" ID="borderColorList" 
                            OnSelectedIndexChanged="ChangeBorderColor" AutoPostBack="True" 
                            EnableViewState="True"></asp:DropDownList>
                        <br>
                        <br>
                        <asp:DropDownList Runat="server" ID="borderStyleList" 
                            OnSelectedIndexChanged="ChangeBorderStyle" AutoPostBack="True" 
                            EnableViewState="True"></asp:DropDownList>
                        <br>            
                        <br>
                        <asp:DropDownList Runat="server" ID="borderWidthList" 
                            OnSelectedIndexChanged="ChangeBorderWidth" AutoPostBack="True"
                            EnableViewState="True"></asp:DropDownList>
                    </td>
                </tr>
            </table>
        </form>
    </body>
</HTML>

[C#] 
<!-- This example demonstrates how to set property values for the
BorderColor, BorderStyle, and BorderWidth properties, and how to 
change the property values at run time. -->

    . . . 
<%@ Page language="c#" AutoEventWireup="true" %>
<%@ Import Namespace="System.Drawing" %>

<HTML>
    <HEAD>
        <SCRIPT runat="server">
            private void Page_Load(object sender, System.EventArgs e)
            {
                // Determine whether this is the first time the page is loaded;
                // if so, load the drop-down lists with data.
                if (!Page.IsPostBack)
                {
                    // Create a ListItemCollection and add names of colors.
                    ListItemCollection colors = new ListItemCollection();
                    colors.Add(Color.Black.Name);
                    colors.Add(Color.Blue.Name);
                    colors.Add(Color.Green.Name);
                    colors.Add(Color.Orange.Name);
                    colors.Add(Color.Purple.Name);
                    colors.Add(Color.Red.Name);
                    colors.Add(Color.White.Name);
                    colors.Add(Color.Yellow.Name);
                    // Bind the colors collection to the borderColorList.
                    borderColorList.DataSource = colors;
                    borderColorList.DataBind();

                    // Create a ListItemCollection and the add names of 
                    // the BorderStyle enumeration values.
                    ListItemCollection styles = new ListItemCollection();

                    foreach (string s in Enum.GetNames(typeof(BorderStyle)))
                    {
                        styles.Add(s);
                    }

                    // Bind the styles collection to the borderStyleList.
                    borderStyleList.DataSource = styles;
                    borderStyleList.DataBind();

                    // Create a ListItemCollection and add width values
                    // expressed in pixels (px).
                    ListItemCollection widths = new ListItemCollection();

                    for (int i = 0; i < 11; i++)
                    {
                        widths.Add(i.ToString() + "px");
                    }

                    // Bind the widths collection to the borderWidthList.
                    borderWidthList.DataSource = widths;
                    borderWidthList.DataBind();
                }

            }

            // This method handles the SelectedIndexChanged event for borderColorList.
            public void ChangeBorderColor(object sender, System.EventArgs e)
            {
                // Convert the color name string to an object of type Color, 
                // and set the Color as the new border color for Label1.
                Label1.BorderColor = Color.FromName(borderColorList.SelectedItem.Text);
            }

            // This method handles the selectedIndexChanged event for boderStyleList.
            public void ChangeBorderStyle(object sender, System.EventArgs e)
            {
                // Convert the style name string to a BorderStyle enumeration value,
                // and set the BorderStyle as the new border style for Label1.
                Label1.BorderStyle = (BorderStyle)Enum.Parse(typeof(BorderStyle),
                                      borderStyleList.SelectedItem.Text);
            }

            // This method handles the SelectedIndexChanged event for borderWidthList.
            public void ChangeBorderWidth(object sender, System.EventArgs e)
            {
                // Convert the border width string to a object of type Unit,
                // and set the Unit as the new border width for Label1.
                Label1.BorderWidth = Unit.Parse(borderWidthList.SelectedItem.Text);
            }
    </SCRIPT>
    </HEAD>

    <BODY>
        <form runat="server">

            <h3> Border Properties Example </h3>

            <table border="0" cellpadding="6">
                <tr>
                    <td>
                        <asp:Label Runat="server" BorderColor="Black" 
                            BorderStyle="Solid" BorderWidth="4px" ID="Label1" 
                            Text="Border Properties Example" Height="75" 
                            Width="200"><center><br>Border Properties Example
                            </center></asp:Label>
                    </td>

                    <td>
                        <asp:DropDownList Runat="server" ID="borderColorList" 
                            OnSelectedIndexChanged="ChangeBorderColor" AutoPostBack="True" 
                            EnableViewState="True"></asp:DropDownList>
                        <br>
                        <br>
                        <asp:DropDownList Runat="server" ID="borderStyleList" 
                            OnSelectedIndexChanged="ChangeBorderStyle" AutoPostBack="True" 
                            EnableViewState="True"></asp:DropDownList>
                        <br>            
                        <br>
                        <asp:DropDownList Runat="server" ID="borderWidthList" 
                            OnSelectedIndexChanged="ChangeBorderWidth" AutoPostBack="True"
                            EnableViewState="True"></asp:DropDownList>
                    </td>
                </tr>
            </table>
        </form>
    </body>
</HTML>

[C++] No example is available for C++. To view a Visual Basic, C#, or JScript example, click the Language Filter button Language Filter in the upper-left corner of the page.

Requirements

Platforms: Windows 2000, Windows XP Professional, Windows Server 2003 family

See Also

WebControl Class | WebControl Members | System.Web.UI.WebControls Namespace | Unit | Style

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