LinkLabel 类
表示可显示超链接的 Windows 标签控件。
**命名空间:**System.Windows.Forms
**程序集:**System.Windows.Forms（在 system.windows.forms.dll 中）
语法
声明
<ComVisibleAttribute(True)> _
<ClassInterfaceAttribute(ClassInterfaceType.AutoDispatch)> _
Public Class LinkLabel
Inherits Label
Implements IButtonControl
用法
Dim instance As LinkLabel
[ComVisibleAttribute(true)]
[ClassInterfaceAttribute(ClassInterfaceType.AutoDispatch)]
public class LinkLabel : Label, IButtonControl
[ComVisibleAttribute(true)]
[ClassInterfaceAttribute(ClassInterfaceType::AutoDispatch)]
public ref class LinkLabel : public Label, IButtonControl
/** @attribute ComVisibleAttribute(true) */
/** @attribute ClassInterfaceAttribute(ClassInterfaceType.AutoDispatch) */
public class LinkLabel extends Label implements IButtonControl
ComVisibleAttribute(true)
ClassInterfaceAttribute(ClassInterfaceType.AutoDispatch)
public class LinkLabel extends Label implements IButtonControl
备注
ToolStripLabel 控件替换并向 Label 和 LinkLabel 控件添加功能。但是，Label 和 LinkLabel 控件均被保留下来，以实现向后兼容性和供以后使用（如果选用的话）。
LinkLabel 控件除了可显示超链接以外，它与 Label 控件类似。在控件的文本中可以指定多个超链接。每个超链接可在应用程序内执行不同的任务。例如，可使用超链接在 Microsoft Internet Explorer 中显示网站或加载与应用程序关联的日志文件。
在 LinkLabel 控件中显示的每个超链接都是 LinkLabel.Link 类的一个实例。LinkLabel.Link 类定义超链接的显示信息、状态和位置。另外，LinkLabel.Link 类的 LinkData 属性使您得以将信息（如要显示的 URL）与超链接关联。当用户单击控件内的超链接时，引发 LinkClicked 事件，表示所单击的超链接的 LinkLabel.Link 对象作为 LinkLabelLinkClickedEventArgs 对象（该对象作为参数传递）的一部分传递给事件处理程序。可以使用此对象获取与用户所单击的超链接关联的 LinkLabel.Link 对象。LinkLabel 控件内包含的所有超链接都存储在控件的 LinkLabel.LinkCollection 类实例中。
有两种方法可将超链接添加到 LinkLabel 控件中。最快捷的方法是指定 LinkArea，并将其分配给 LinkArea 属性。这使您得以在控件的文本内指定单个超链接。若要添加多个超链接，可使用 LinkLabel.LinkCollection 类的 Add 方法，用户可以通过 Links 属性访问该集合来使用此方法。
创建 LinkLabel 控件时，将向 LinkLabel.LinkCollection 添加包含 LinkLabel 控件内的全部文本的默认超链接。可以使用 LinkArea 属性指定新的链接区域来重写此默认链接；或者使用 LinkLabel.LinkCollection 的 Add 方法指定链接。也可使用 LinkLabel.LinkCollection 类的 Remove 方法来移除默认超链接。
LinkLabel 提供许多属性，这些属性使您得以定义控件中超链接的显示外观。ActiveLinkColor、DisabledLinkColor、LinkColor 和 VisitedLinkColor 属性定义在各种状态下显示超链接时所使用的颜色。LinkBehavior 属性定义与超链接关联的下划线的显示方式。
示例
下面的示例演示了如何使用 LinkLabel 类并定义多个 LinkArea 部分，来显示窗体中的标签。该示例演示了如何设置 AutoSize、LinkBehavior、DisabledLinkColor、LinkColor 和 VisitedLinkColor 属性来自定义 LinkLabel 的外观。使用 LinkLabel.LinkArea 属性指定第一个 LinkArea。使用 LinkLabel.LinkCollection.Add 方法将其他链接添加到 LinkLabel。该示例通过启动超链接的 Web 浏览器并显示其他链接的 MessageBox 来处理 LinkClicked 事件。
Imports System
Imports System.Drawing
Imports System.Windows.Forms
Public NotInheritable Class Form1
Inherits System.Windows.Forms.Form
Friend WithEvents LinkLabel1 As System.Windows.Forms.LinkLabel
<System.STAThread()> _
Public Shared Sub Main()
System.Windows.Forms.Application.Run(New Form1)
End Sub 'Main
Public Sub New()
MyBase.New()
Me.LinkLabel1 = New System.Windows.Forms.LinkLabel
' Configure the LinkLabel's size and location. Specify that the
' size should be automatically determined by the content.
Me.linkLabel1.Location = New System.Drawing.Point(34, 56)
Me.linkLabel1.Size = New System.Drawing.Size(224, 16)
Me.linkLabel1.AutoSize = True
' Configure the appearance.
' Set the DisabledLinkColor so that a disabled link will show up against the form's background.
Me.linkLabel1.DisabledLinkColor = System.Drawing.Color.Red
Me.linkLabel1.VisitedLinkColor = System.Drawing.Color.Blue
Me.linkLabel1.LinkBehavior = System.Windows.Forms.LinkBehavior.HoverUnderline
Me.linkLabel1.LinkColor = System.Drawing.Color.Navy
Me.linkLabel1.TabIndex = 0
Me.linkLabel1.TabStop = True
' Identify what the first Link is.
Me.linkLabel1.LinkArea = New System.Windows.Forms.LinkArea(0, 8)
' Identify that the first link is visited already.
Me.linkLabel1.Links(0).Visited = true
' Set the Text property to a string.
Me.linkLabel1.Text = "Register Online. Visit Microsoft. Visit MSN."
' Create new links using the Add method of the LinkCollection class.
' Underline the appropriate words in the LinkLabel's Text property.
' The words 'Register', 'Microsoft', and 'MSN' will
' all be underlined and behave as hyperlinks.
' First check that the Text property is long enough to accommodate
' the desired hyperlinked areas. If it's not, don't add hyperlinks.
If Me.LinkLabel1.Text.Length >= 45 Then
Me.LinkLabel1.Links(0).LinkData = "Register"
Me.LinkLabel1.Links.Add(24, 9, "www.microsoft.com")
Me.LinkLabel1.Links.Add(42, 3, "www.msn.com")
' The second link is disabled and will appear as red.
Me.linkLabel1.Links(1).Enabled = False
End If
' Set up how the form should be displayed and adds the controls to the form.
Me.ClientSize = New System.Drawing.Size(292, 266)
Me.Controls.AddRange(New System.Windows.Forms.Control() {Me.LinkLabel1})
Me.Text = "Link Label Example"
End Sub
Private Sub linkLabel1_LinkClicked(ByVal sender As Object, _
ByVal e As System.Windows.Forms.LinkLabelLinkClickedEventArgs) Handles LinkLabel1.LinkClicked
' Determine which link was clicked within the LinkLabel.
Me.LinkLabel1.Links(LinkLabel1.Links.IndexOf(e.Link)).Visited = True
' Displays the appropriate link based on the value of the LinkData property of the Link object.
Dim target As String = CType(e.Link.LinkData, String)
' If the value looks like a URL, navigate to it.
' Otherwise, display it in a message box.
If (Nothing <> target) And (target.StartsWith("www")) Then
System.Diagnostics.Process.Start(target)
Else
MessageBox.Show(("Item clicked: " + target))
End If
End Sub
End Class
using System;
using System.Drawing;
using System.Windows.Forms;
public class Form1 : System.Windows.Forms.Form
{
private System.Windows.Forms.LinkLabel linkLabel1;
[STAThread]
static void Main()
{
Application.Run(new Form1());
}
public Form1()
{
// Create the LinkLabel.
this.linkLabel1 = new System.Windows.Forms.LinkLabel();
// Configure the LinkLabel's size and location. Specify that the
// size should be automatically determined by the content.
this.linkLabel1.Location = new System.Drawing.Point(34, 56);
this.linkLabel1.Size = new System.Drawing.Size(224, 16);
this.linkLabel1.AutoSize = true;
// Configure the appearance.
// Set the DisabledLinkColor so that a disabled link will show up against the form's background.
this.linkLabel1.DisabledLinkColor = System.Drawing.Color.Red;
this.linkLabel1.VisitedLinkColor = System.Drawing.Color.Blue;
this.linkLabel1.LinkBehavior = System.Windows.Forms.LinkBehavior.HoverUnderline;
this.linkLabel1.LinkColor = System.Drawing.Color.Navy;
this.linkLabel1.TabIndex = 0;
this.linkLabel1.TabStop = true;
// Add an event handler to do something when the links are clicked.
this.linkLabel1.LinkClicked += new System.Windows.Forms.LinkLabelLinkClickedEventHandler(this.linkLabel1_LinkClicked);
// Identify what the first Link is.
this.linkLabel1.LinkArea = new System.Windows.Forms.LinkArea(0, 8);
// Identify that the first link is visited already.
this.linkLabel1.Links[0].Visited = true;
// Set the Text property to a string.
this.linkLabel1.Text = "Register Online. Visit Microsoft. Visit MSN.";
// Create new links using the Add method of the LinkCollection class.
// Underline the appropriate words in the LinkLabel's Text property.
// The words 'Register', 'Microsoft', and 'MSN' will
// all be underlined and behave as hyperlinks.
// First check that the Text property is long enough to accommodate
// the desired hyperlinked areas. If it's not, don't add hyperlinks.
if(this.linkLabel1.Text.Length >= 45)
{
this.linkLabel1.Links[0].LinkData = "Register";
this.linkLabel1.Links.Add(24, 9, "www.microsoft.com");
this.linkLabel1.Links.Add(42, 3, "www.msn.com");
// The second link is disabled and will appear as red.
this.linkLabel1.Links[1].Enabled = false;
}
// Set up how the form should be displayed and add the controls to the form.
this.ClientSize = new System.Drawing.Size(292, 266);
this.Controls.AddRange(new System.Windows.Forms.Control[] {this.linkLabel1});
this.Text = "Link Label Example";
}
private void linkLabel1_LinkClicked(object sender, System.Windows.Forms.LinkLabelLinkClickedEventArgs e)
{
// Determine which link was clicked within the LinkLabel.
this.linkLabel1.Links[linkLabel1.Links.IndexOf(e.Link)].Visited = true;
// Display the appropriate link based on the value of the
// LinkData property of the Link object.
string target = e.Link.LinkData as string;
// If the value looks like a URL, navigate to it.
// Otherwise, display it in a message box.
if(null != target && target.StartsWith("www"))
{
System.Diagnostics.Process.Start(target);
}
else
{
MessageBox.Show("Item clicked: " + target);
}
}
}
#using <System.dll>
#using <System.Windows.Forms.dll>
#using <System.Drawing.dll>
using namespace System;
using namespace System::Drawing;
using namespace System::Windows::Forms;
public ref class Form1: public System::Windows::Forms::Form
{
private:
System::Windows::Forms::LinkLabel^ linkLabel1;
public:
Form1()
{
// Create the LinkLabel.
this->linkLabel1 = gcnew System::Windows::Forms::LinkLabel;
// Configure the LinkLabel's size and location. Specify that the
// size should be automatically determined by the content.
this->linkLabel1->Location = System::Drawing::Point( 34, 56 );
this->linkLabel1->Size = System::Drawing::Size( 224, 16 );
this->linkLabel1->AutoSize = true;
// Configure the appearance.
this->linkLabel1->DisabledLinkColor = System::Drawing::Color::Red;
this->linkLabel1->VisitedLinkColor = System::Drawing::Color::Blue;
this->linkLabel1->LinkBehavior = System::Windows::Forms::LinkBehavior::HoverUnderline;
this->linkLabel1->LinkColor = System::Drawing::Color::Navy;
this->linkLabel1->TabIndex = 0;
this->linkLabel1->TabStop = true;
// Add an event handler to do something when the links are clicked.
this->linkLabel1->LinkClicked += gcnew System::Windows::Forms::LinkLabelLinkClickedEventHandler( this, &Form1::linkLabel1_LinkClicked );
// Identify what the first Link is.
this->linkLabel1->LinkArea = System::Windows::Forms::LinkArea( 0, 8 );
// Identify that the first link is visited already.
this->linkLabel1->Links[ 0 ]->Visited = true;
// Set the Text property to a String*.
this->linkLabel1->Text = "Register Online. Visit Microsoft. Visit MSN.";
// Create new links using the Add method of the LinkCollection class.
// Underline the appropriate words in the LinkLabel's Text property.
// The words 'Register', 'Microsoft', and 'MSN' will
// all be underlined and behave as hyperlinks.
// First check that the Text property is long enough to accommodate
// the desired hyperlinked areas. If it's not, don't add hyperlinks.
if ( this->linkLabel1->Text->Length >= 45 )
{
this->linkLabel1->Links[ 0 ]->LinkData = "Register";
this->linkLabel1->Links->Add( 24, 9, "www.microsoft.com" );
this->linkLabel1->Links->Add( 42, 3, "www.msn.com" );
this->linkLabel1->Links[ 1 ]->Enabled = false;
}
// Set up how the form should be displayed and add the controls to the form.
this->ClientSize = System::Drawing::Size( 292, 266 );
array<System::Windows::Forms::Control^>^temp0 = {this->linkLabel1};
this->Controls->AddRange( temp0 );
this->Text = "Link Label Example";
}
private:
void linkLabel1_LinkClicked( Object^ /*sender*/, System::Windows::Forms::LinkLabelLinkClickedEventArgs^ e )
{
// Determine which link was clicked within the LinkLabel.
this->linkLabel1->Links[ linkLabel1->Links->IndexOf( e->Link ) ]->Visited = true;
// Display the appropriate link based on the value of the
// LinkData property of the Link Object*.
String^ target = dynamic_cast<String^>(e->Link->LinkData);
// If the value looks like a URL, navigate to it.
// Otherwise, display it in a message box.
if ( nullptr != target && target->StartsWith( "www" ) )
{
System::Diagnostics::Process::Start( target );
}
else
{
MessageBox::Show( "Item clicked: {0}", target );
}
}
};
[STAThread]
int main()
{
Application::Run( gcnew Form1 );
}
import System.*;
import System.Drawing.*;
import System.Windows.Forms.*;
public class Form1 extends System.Windows.Forms.Form
{
private System.Windows.Forms.LinkLabel linkLabel1;
/** @attribute STAThread()
*/
public static void main(String[] args)
{
Application.Run(new Form1());
} //main
public Form1()
{
// Create the LinkLabel.
this.linkLabel1 = new System.Windows.Forms.LinkLabel();
// Configure the LinkLabel's size and location. Specify that the
// size should be automatically determined by the content.
this.linkLabel1.set_Location(new System.Drawing.Point(34, 56));
this.linkLabel1.set_Size(new System.Drawing.Size(224, 16));
this.linkLabel1.set_AutoSize(true);
// Configure the appearance.
// Set the DisabledLinkColor so that a disabled link will show up
// against the form's background.
this.linkLabel1.set_DisabledLinkColor(System.Drawing.Color.get_Red());
this.linkLabel1.set_VisitedLinkColor(System.Drawing.Color.get_Blue());
this.linkLabel1.set_LinkBehavior(
System.Windows.Forms.LinkBehavior.HoverUnderline);
this.linkLabel1.set_LinkColor(System.Drawing.Color.get_Navy());
this.linkLabel1.set_TabIndex(0);
this.linkLabel1.set_TabStop(true);
// Add an event handler to do something when the links are clicked.
this.linkLabel1.add_LinkClicked(new System.Windows.Forms.
LinkLabelLinkClickedEventHandler(this.linkLabel1_LinkClicked));
// Identify what the first Link is.
this.linkLabel1.set_LinkArea(new System.Windows.Forms.LinkArea(0, 8));
// Identify that the first link is visited already.
this.linkLabel1.get_Links().get_Item(0).set_Visited(true);
// Set the Text property to a string.
this.linkLabel1.set_Text("Register Online. Visit Microsoft."
+ " Visit MSN.");
// Create new links using the Add method of the LinkCollection class.
// Underline the appropriate words in the LinkLabel's Text property.
// The words 'Register', 'Microsoft', and 'MSN' will
// all be underlined and behave as hyperlinks.
// First check that the Text property is long enough to accommodate
// the desired hyperlinked areas. If it's not, don't add hyperlinks.
if (this.linkLabel1.get_Text().get_Length() >= 45) {
this.linkLabel1.get_Links().get_Item(0).set_LinkData("Register");
this.linkLabel1.get_Links().Add(24, 9, "www.microsoft.com");
this.linkLabel1.get_Links().Add(42, 3, "www.msn.com");
// The second link is disabled and will appear as red.
this.linkLabel1.get_Links().get_Item(1).set_Enabled(false);
}
// Set up how the form should be displayed and add the controls to
// the form.
this.set_ClientSize(new System.Drawing.Size(292, 266));
this.get_Controls().AddRange(new System.Windows.Forms.Control[] {
this.linkLabel1 });
this.set_Text("Link Label Example");
} //Form1
private void linkLabel1_LinkClicked(Object sender,
System.Windows.Forms.LinkLabelLinkClickedEventArgs e)
{
// Determine which link was clicked within the LinkLabel.
this.linkLabel1.get_Links().get_Item(linkLabel1.get_Links().
IndexOf(e.get_Link())).set_Visited(true);
// Display the appropriate link based on the value of the
// LinkData property of the Link object.
String target = (String)e.get_Link().get_LinkData();
// If the value looks like a URL, navigate to it.
// Otherwise, display it in a message box.
if (null != target && target.StartsWith("www")) {
System.Diagnostics.Process.Start(target);
}
else {
MessageBox.Show("Item clicked: " + target);
}
} //linkLabel1_LinkClicked
} //Form1
继承层次结构
System.Object
System.MarshalByRefObject
System.ComponentModel.Component
System.Windows.Forms.Control
System.Windows.Forms.Label
System.Windows.Forms.LinkLabel
线程安全
此类型的任何公共静态（Visual Basic 中的 Shared）成员都是线程安全的，但不保证所有实例成员都是线程安全的。
平台
Windows 98、Windows 2000 SP4、Windows CE、Windows Millennium Edition、Windows Mobile for Pocket PC、Windows Mobile for Smartphone、Windows Server 2003、Windows XP Media Center Edition、Windows XP Professional x64 Edition、Windows XP SP2、Windows XP Starter Edition
.NET Framework 并不是对每个平台的所有版本都提供支持。有关受支持版本的列表，请参见系统要求。
版本信息
.NET Framework
受以下版本支持：2.0、1.1、1.0
.NET Compact Framework
受以下版本支持：2.0
请参见
参考
LinkLabel 成员
System.Windows.Forms 命名空间
Label 类
LinkLabelLinkClickedEventArgs
LinkLabel.Link
LinkLabel.LinkCollection
ToolStripLabel