.NET Framework Class Library
WebControlBorderWidth Property

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

Namespace:   System.Web.UI.WebControls
Assembly:  System.Web (in System.Web.dll)
Syntax
Public Overridable Property BorderWidth As [%$TOPIC/ceck7dzx_en-us_VS_110_1_0_0_0_0%]
public virtual [%$TOPIC/ceck7dzx_en-us_VS_110_1_0_1_0_0%] BorderWidth { get; set; }
public:
virtual property [%$TOPIC/ceck7dzx_en-us_VS_110_1_0_2_0_0%] BorderWidth {
	[%$TOPIC/ceck7dzx_en-us_VS_110_1_0_2_0_1%] get ();
	void set ([%$TOPIC/ceck7dzx_en-us_VS_110_1_0_2_0_2%] value);
}
abstract BorderWidth : [%$TOPIC/ceck7dzx_en-us_VS_110_1_0_3_0_0%] with get, set 
override BorderWidth : [%$TOPIC/ceck7dzx_en-us_VS_110_1_0_3_0_1%] with get, set
<asp:[%$TOPIC/ceck7dzx_en-us_VS_110_1_0_4_0_0%] BorderWidth="[%$TOPIC/ceck7dzx_en-us_VS_110_1_0_4_0_1%]" />

Property Value

Type: System.Web.UI.WebControlsUnit
A Unit that represents the border width of a Web server control. The default value is Empty, which indicates that this property is not set.
Exceptions
ExceptionCondition
ArgumentException

The specified border width is a negative value.

Remarks

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

NoteNote

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.

NoteNote

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.

Examples

The following example illustrates how to set the BorderWidth property of the Table control, inherited from the WebControl base class.

<%@ 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">
</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
<head id="Head1" runat="server">
    <title>Table Property</title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
        <h3>Property of a Table Web Control</h3>

        <asp:Table id="Table1" runat="server"
            CellPadding = "10" 
            CellSpacing="0"
            GridLines="Both"
            BorderColor="Red"
            BorderWidth="3">

            <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>
    </div>
    </form>
</body>
</html>
<%@ 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">
</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
<head id="Head1" runat="server">
    <title>Table Property</title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
        <h3>Property of a Table Web Control</h3>

        <asp:Table id="Table1" runat="server"
            CellPadding = "10" 
            CellSpacing="0"
            GridLines="Both"
            BorderColor="Red"
            BorderWidth="3">

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

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.

<!-- 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" %>

<!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(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>
<html xmlns="http://www.w3.org/1999/xhtml" >
    <head>
    <title> Border Properties Example </title>
</head>

    <body>
        <form id="form1" 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>
<!-- 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" %>

<!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, 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>
<html xmlns="http://www.w3.org/1999/xhtml" >
    <head>
    <title> Border Properties Example </title>
</head>

    <body>
        <form id="form1" 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>
Version Information

.NET Framework

Supported in: 4.5.1, 4.5, 4, 3.5, 3.0, 2.0, 1.1, 1.0
Platforms

Windows Phone 8.1, Windows Phone 8, Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.