WebControl.BorderColor-Eigenschaft
Ruft die Rahmenfarbe des Websteuerelements ab oder legt diese fest.
Namespace: System.Web.UI.WebControls
Assembly: System.Web (in system.web.dll)
Syntax
'Declaration
Public Overridable Property BorderColor As Color
'Usage
Dim instance As WebControl
Dim value As Color
value = instance.BorderColor
instance.BorderColor = value
public virtual Color BorderColor { get; set; }
public:
virtual property Color BorderColor {
Color get ();
void set (Color value);
}
/** @property */
public Color get_BorderColor ()
/** @property */
public void set_BorderColor (Color value)
public function get BorderColor () : Color
public function set BorderColor (value : Color)
Eigenschaftenwert
Eine Color, die die Rahmenfarbe des Steuerelements darstellt. Der Standardwert ist Empty und gibt an, dass diese Eigenschaft nicht festgelegt ist.
Hinweise
Mit der BorderColor-Eigenschaft geben Sie die Rahmenfarbe des Webserversteuerelements an. Diese Eigenschaft wird mit einem Color-Objekt festgelegt.
Hinweis
Die BorderColor-Eigenschaft wird nur bei bestimmten Steuerelementen dargestellt. Diese Eigenschaft wird z. B. von den Steuerelementen Table, Panel, DataGrid, Calendar und ValidationSummary dargestellt. Sie kann auch bei den Steuerelementen CheckBoxList, RadioButtonList und DataList verwendet werden, wenn deren RepeatLayout-Eigenschaft auf RepeatLayout.Table und nicht auf RepeatLayout.Flow festgelegt ist. Sie wird jedoch als bordercolor-Attribut dargestellt, das nicht Teil des HTML 3.2-Standards ist. Das bordercolor-Attribut wird von Microsoft Internet Explorer ab Version 3.0 unterstützt, aber nicht von den meisten anderen Browsern.
Wenn die BorderColor-Eigenschaft nicht festgelegt wird, verwendet der Browser die Standardrahmenfarbe. Weiterführende Erläuterungen zur Ermittlung des Standardfarbschema des Browsers finden Sie im Browser.
Beispiel
Im folgenden Beispiel wird veranschaulicht, wie die BorderColor-Eigenschaft des von der WebControl-Basisklasse geerbten Table-Steuerelements festgelegt wird.
<%@ Page Language="VB" AutoEventWireup="True" %>
<html>
<body>
<h3>BorderColor Property of a Web Control</h3>
<form runat=server>
<asp:Table id="Table1" runat="server"
CellPadding=10
GridLines="Both"
BorderColor="Brown"
>
<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>
<%@ Page Language="C#" AutoEventWireup="True" %>
<html>
<body>
<h3>BorderColor Property of a Web Control</h3>
<form runat=server>
<asp:Table id="Table1" runat="server"
CellPadding=10
GridLines="Both"
BorderColor="Brown"
>
<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>
<%@ Page Language="JScript" AutoEventWireup="True" %>
<html>
<body>
<h3>BorderColor Property of a Web Control</h3>
<form runat=server>
<asp:Table id="Table1" runat="server"
CellPadding=10
GridLines="Both"
BorderColor="Brown"
>
<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>
Hinweis
Im folgenden Codebeispiel wird das Einzeldatei-Codemodell verwendet. Das Beispiel funktioniert möglicherweise nicht, wenn es direkt in eine CodeBehind-Datei kopiert wird. Dieses Codebeispiel muss in eine leere Textdatei mit einer ASPX-Erweiterung kopiert werden. Weitere Informationen zum Web Forms-Codemodell finden Sie unter Codemodell für ASP.NET-Webseiten.
<!-- 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>
<!-- 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>
Plattformen
Windows 98, Windows 2000 SP4, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition
.NET Framework unterstützt nicht alle Versionen sämtlicher Plattformen. Eine Liste der unterstützten Versionen finden Sie unter Systemanforderungen.
Versionsinformationen
.NET Framework
Unterstützt in: 2.0, 1.1, 1.0
Siehe auch
Referenz
WebControl-Klasse
WebControl-Member
System.Web.UI.WebControls-Namespace
System.Drawing.Color
Style-Klasse
Table-Klasse
Panel-Klasse
DataGrid-Klasse
Calendar-Klasse
ValidationSummary-Klasse
CheckBoxList-Klasse
RadioButtonList-Klasse
DataList-Klasse
RepeatLayout-Enumeration
Weitere Ressourcen
ASP.NET-Webserversteuerelemente und Browserfunktionen
Syntax des Webserversteuerelements
Entwickeln von benutzerdefinierten ASP.NET-Serversteuerelementen