Cursor 類別

定義

表示用來繪製滑鼠指標的影像。Represents the image used to paint the mouse pointer.

public ref class Cursor sealed : IDisposable, System::Runtime::Serialization::ISerializable
[System.ComponentModel.TypeConverter(typeof(System.Windows.Forms.CursorConverter))]
[System.Serializable]
public sealed class Cursor : IDisposable, System.Runtime.Serialization.ISerializable
type Cursor = class
    interface IDisposable
    interface ISerializable
Public NotInheritable Class Cursor
Implements IDisposable, ISerializable
繼承
Cursor
屬性
實作

範例

下列程式碼範例會顯示一個表單,示範如何使用自訂資料指標。The following code example displays a form that demonstrates using a custom cursor. 自訂 Cursor 內嵌于應用程式的資源檔中。The custom Cursor is embedded in the application's resource file. 此範例需要包含在名為 MyCursor.cur的資料指標檔案中的資料指標。The example requires a cursor contained in a cursor file named MyCursor.cur. 若要使用命令列編譯此範例,請包含下列旗標: /res:MyCursor.Cur, CustomCursor.MyCursor.CurTo compile this example using the command line, include the following flag: /res:MyCursor.Cur, CustomCursor.MyCursor.Cur

using System;
using System.Drawing;
using System.Windows.Forms;

namespace CustomCursor
{
    public class Form1 : System.Windows.Forms.Form
    {
        [STAThread]
        static void Main() 
        {
            Application.Run(new Form1());
        }

        public Form1()
        {
            this.ClientSize = new System.Drawing.Size(292, 266);
            this.Text = "Cursor Example";
            
            // The following generates a cursor from an embedded resource.
            
            // To add a custom cursor, create a bitmap
            //        1. Add a new cursor file to your project: 
            //                Project->Add New Item->General->Cursor File

            // --- To make the custom cursor an embedded resource  ---
            
            // In Visual Studio:
            //        1. Select the cursor file in the Solution Explorer
            //        2. Choose View->Properties.
            //        3. In the properties window switch "Build Action" to "Embedded Resources"

            // On the command line:
            //        Add the following flag:
            //            /res:CursorFileName.cur,Namespace.CursorFileName.cur
            //        
            //        Where "Namespace" is the namespace in which you want to use the cursor
            //        and   "CursorFileName.cur" is the cursor filename.

            // The following line uses the namespace from the passed-in type
            // and looks for CustomCursor.MyCursor.Cur in the assemblies manifest.
        // NOTE: The cursor name is acase sensitive.
            this.Cursor = new Cursor(GetType(), "MyCursor.cur");  
           
        }
    }
}
Imports System.Drawing
Imports System.Windows.Forms

Namespace CustomCursor
   
   Public Class Form1
      Inherits System.Windows.Forms.Form
      
      <System.STAThread()> _
      Public Shared Sub Main()
         System.Windows.Forms.Application.Run(New Form1())
      End Sub

      Public Sub New()

         Me.ClientSize = New System.Drawing.Size(292, 266)
         Me.Text = "Cursor Example"
         
        ' The following generates a cursor from an embedded resource.
         
        'To add a custom cursor, create a bitmap
        '       1. Add a new cursor file to your project: 
        '               Project->Add New Item->General->Cursor File

        '--- To make the custom cursor an embedded resource  ---

        'In Visual Studio:
        '       1. Select the cursor file in the Solution Explorer
        '       2. Choose View->Properties.
        '       3. In the properties window switch "Build Action" to "Embedded Resources"

        'On the command line:
        '       Add the following flag:
        '           /res:CursorFileName.cur,Namespace.CursorFileName.cur

        '       Where "Namespace" is the namespace in which you want to use the cursor
        '       and   "CursorFileName.cur" is the cursor filename.

        'The following line uses the namespace from the passed-in type
        'and looks for CustomCursor.MyCursor.cur in the assemblies manifest.
        'NOTE: The cursor name is acase sensitive.
        Me.Cursor = New Cursor(Me.GetType(), "MyCursor.cur")
      End Sub
   End Class
End Namespace 'CustomCursor

下列程式碼範例會在 TreeView 控制項中顯示客戶資訊。The following code example displays customer information in a TreeView control. 根樹狀節點會顯示客戶名稱,而子樹狀節點則會顯示指派給每個客戶的訂單號碼。The root tree nodes display customer names, and the child tree nodes display the order numbers assigned to each customer. 在此範例中,1000客戶會以15個訂單顯示。In this example, 1,000 customers are displayed with 15 orders each. TreeView 的重新繪製會使用 BeginUpdateEndUpdate 方法來隱藏,而且當 TreeView 建立並繪製 TreeNode 物件時,會顯示等候 CursorThe repainting of the TreeView is suppressed by using the BeginUpdate and EndUpdate methods, and a wait Cursor is displayed while the TreeView creates and paints the TreeNode objects. 此範例會要求您在應用程式目錄中具有名為 MyWait.cur 的游標檔案。This example requires that you have a cursor file named MyWait.cur in the application directory. 它也需要可保存 Order 物件集合的 Customer 物件,而且您已在 Form上建立 TreeView 控制項的實例。It also requires a Customer object that can hold a collection of Order objects, and that you have created an instance of a TreeView control on a Form.

// The basic Customer class.
ref class Customer: public System::Object
{
private:
   String^ custName;

protected:
   ArrayList^ custOrders;

public:
   Customer( String^ customername )
   {
      custName = "";
      custOrders = gcnew ArrayList;
      this->custName = customername;
   }


   property String^ CustomerName 
   {
      String^ get()
      {
         return this->custName;
      }

      void set( String^ value )
      {
         this->custName = value;
      }

   }

   property ArrayList^ CustomerOrders 
   {
      ArrayList^ get()
      {
         return this->custOrders;
      }

   }

};


// End Customer class
// The basic customer Order class.
ref class Order: public System::Object
{
private:
   String^ ordID;

public:
   Order( String^ orderid )
   {
      ordID = "";
      this->ordID = orderid;
   }


   property String^ OrderID 
   {
      String^ get()
      {
         return this->ordID;
      }

      void set( String^ value )
      {
         this->ordID = value;
      }

   }

};
// End Order class



void FillMyTreeView()
{
   // Add customers to the ArrayList of Customer objects.
   for ( int x = 0; x < 1000; x++ )
   {
      customerArray->Add( gcnew Customer( "Customer " + x ) );
   }
   
   // Add orders to each Customer object in the ArrayList.
   IEnumerator^ myEnum = customerArray->GetEnumerator();
   while ( myEnum->MoveNext() )
   {
      Customer^ customer1 = safe_cast<Customer^>(myEnum->Current);
      for ( int y = 0; y < 15; y++ )
      {
         customer1->CustomerOrders->Add( gcnew Order( "Order " + y ) );
      }
   }

   // Display a wait cursor while the TreeNodes are being created.
   ::Cursor::Current = gcnew System::Windows::Forms::Cursor( "MyWait.cur" );
   
   // Suppress repainting the TreeView until all the objects have been created.
   treeView1->BeginUpdate();
   
   // Clear the TreeView each time the method is called.
   treeView1->Nodes->Clear();
   
   // Add a root TreeNode for each Customer object in the ArrayList.
   myEnum = customerArray->GetEnumerator();
   while ( myEnum->MoveNext() )
   {
      Customer^ customer2 = safe_cast<Customer^>(myEnum->Current);
      treeView1->Nodes->Add( gcnew TreeNode( customer2->CustomerName ) );
      
      // Add a child treenode for each Order object in the current Customer object.
      IEnumerator^ myEnum = customer2->CustomerOrders->GetEnumerator();
      while ( myEnum->MoveNext() )
      {
         Order^ order1 = safe_cast<Order^>(myEnum->Current);
         treeView1->Nodes[ customerArray->IndexOf( customer2 ) ]->Nodes->Add( gcnew TreeNode( customer2->CustomerName + "." + order1->OrderID ) );
      }
   }
   
   // Reset the cursor to the default for all controls.
   ::Cursor::Current = Cursors::Default;
   
   // Begin repainting the TreeView.
   treeView1->EndUpdate();
}

// The basic Customer class.
public class Customer : System.Object
{
   private string custName = "";
   protected ArrayList custOrders = new ArrayList();

   public Customer(string customername)
   {
      this.custName = customername;
   }

   public string CustomerName
   {      
      get{return this.custName;}
      set{this.custName = value;}
   }

   public ArrayList CustomerOrders 
   {
      get{return this.custOrders;}
   }

} // End Customer class 

// The basic customer Order class.
public class Order : System.Object
{
   private string ordID = "";

   public Order(string orderid)
   {
      this.ordID = orderid;
   }

   public string OrderID
   {      
      get{return this.ordID;}
      set{this.ordID = value;}
   }

} // End Order class

// Create a new ArrayList to hold the Customer objects.
private ArrayList customerArray = new ArrayList(); 

private void FillMyTreeView()
{
   // Add customers to the ArrayList of Customer objects.
   for(int x=0; x<1000; x++)
   {
      customerArray.Add(new Customer("Customer" + x.ToString()));
   }

   // Add orders to each Customer object in the ArrayList.
   foreach(Customer customer1 in customerArray)
   {
      for(int y=0; y<15; y++)
      {
         customer1.CustomerOrders.Add(new Order("Order" + y.ToString()));    
      }
   }

   // Display a wait cursor while the TreeNodes are being created.
   Cursor.Current = new Cursor("MyWait.cur");
        
   // Suppress repainting the TreeView until all the objects have been created.
   treeView1.BeginUpdate();

   // Clear the TreeView each time the method is called.
   treeView1.Nodes.Clear();

   // Add a root TreeNode for each Customer object in the ArrayList.
   foreach(Customer customer2 in customerArray)
   {
      treeView1.Nodes.Add(new TreeNode(customer2.CustomerName));
          
      // Add a child treenode for each Order object in the current Customer object.
      foreach(Order order1 in customer2.CustomerOrders)
      {
         treeView1.Nodes[customerArray.IndexOf(customer2)].Nodes.Add(
           new TreeNode(customer2.CustomerName + "." + order1.OrderID));
      }
   }

   // Reset the cursor to the default for all controls.
   Cursor.Current = Cursors.Default;

   // Begin repainting the TreeView.
   treeView1.EndUpdate();
}
Public Class Customer
   Inherits [Object]
   Private custName As String = ""
   Friend custOrders As New ArrayList()

   Public Sub New(ByVal customername As String)
      Me.custName = customername
   End Sub

   Public Property CustomerName() As String
      Get
         Return Me.custName
      End Get
      Set(ByVal Value As String)
         Me.custName = Value
      End Set
   End Property

   Public ReadOnly Property CustomerOrders() As ArrayList
      Get
         Return Me.custOrders
      End Get
   End Property
End Class


Public Class Order
   Inherits [Object]
   Private ordID As String

   Public Sub New(ByVal orderid As String)
      Me.ordID = orderid
   End Sub

   Public Property OrderID() As String
      Get
         Return Me.ordID
      End Get
      Set(ByVal Value As String)
         Me.ordID = Value
      End Set
   End Property
End Class

' Create a new ArrayList to hold the Customer objects.
Private customerArray As New ArrayList()

Private Sub FillMyTreeView()
   ' Add customers to the ArrayList of Customer objects.
   Dim x As Integer
   For x = 0 To 999
      customerArray.Add(New Customer("Customer" + x.ToString()))
   Next x

   ' Add orders to each Customer object in the ArrayList.
   Dim customer1 As Customer
   For Each customer1 In customerArray
      Dim y As Integer
      For y = 0 To 14
         customer1.CustomerOrders.Add(New Order("Order" + y.ToString()))
      Next y
   Next customer1

   ' Display a wait cursor while the TreeNodes are being created.
   Cursor.Current = New Cursor("MyWait.cur")

   ' Suppress repainting the TreeView until all the objects have been created.
   treeView1.BeginUpdate()

   ' Clear the TreeView each time the method is called.
   treeView1.Nodes.Clear()

   ' Add a root TreeNode for each Customer object in the ArrayList.
   Dim customer2 As Customer
   For Each customer2 In customerArray
      treeView1.Nodes.Add(New TreeNode(customer2.CustomerName))

      ' Add a child TreeNode for each Order object in the current Customer object.
      Dim order1 As Order
      For Each order1 In customer2.CustomerOrders
         treeView1.Nodes(customerArray.IndexOf(customer2)).Nodes.Add( _
    New TreeNode(customer2.CustomerName + "." + order1.OrderID))
      Next order1
   Next customer2

   ' Reset the cursor to the default for all controls.
   Cursor.Current = System.Windows.Forms.Cursors.Default

   ' Begin repainting the TreeView.
   treeView1.EndUpdate()
End Sub

備註

游標是小圖片,其位置在螢幕上是由指標裝置所控制,例如滑鼠、畫筆或軌跡球。A cursor is a small picture whose location on the screen is controlled by a pointing device, such as a mouse, pen, or trackball. 當使用者移動指標裝置時,作業系統會據以移動游標。When the user moves the pointing device, the operating system moves the cursor accordingly.

不同的游標圖形用來通知使用者滑鼠將會有什麼作業。Different cursor shapes are used to inform the user what operation the mouse will have. 例如,當編輯或選取文字時,通常會顯示 Cursors.IBeam 的資料指標。For example, when editing or selecting text, a Cursors.IBeam cursor is typically displayed. 等待游標通常用來通知使用者正在執行的進程。A wait cursor is commonly used to inform the user that a process is currently running. 使用者可能等候的程式範例為開啟檔案、儲存檔案,或以大量資料填滿 DataGridListBoxTreeView 之類的控制項。Examples of processes you might have the user wait for are opening a file, saving a file, or filling a control such as a DataGrid, ListBox or TreeView with a large amount of data.

所有衍生自 Control 類別的控制項都具有 Cursor 屬性。All controls that derive from the Control class have a Cursor property. 若要變更滑鼠指標在控制項範圍內時所顯示的游標,請將 Cursor 指派給控制項的 [Cursor] 屬性。To change the cursor displayed by the mouse pointer when it is within the bounds of the control, assign a Cursor to the Cursor property of the control. 或者,您也可以藉由將 Cursor 指派給 Current 屬性,在應用層級顯示資料指標。Alternatively, you can display cursors at the application level by assigning a Cursor to the Current property. 例如,如果您應用程式的目的是要編輯文字檔,您可以將 Current 屬性設為 Cursors.WaitCursor,以在檔案載入或儲存時,在應用程式上顯示等待游標,以防止處理任何滑鼠事件。For example, if the purpose of your application is to edit a text file, you might set the Current property to Cursors.WaitCursor to display a wait cursor over the application while the file loads or saves to prevent any mouse events from being processed. 當程式完成時,將 Current 屬性設定為 [Cursors.Default],讓應用程式在每個控制項類型上顯示適當的游標。When the process is complete, set the Current property to Cursors.Default for the application to display the appropriate cursor over each control type.

注意

如果您在重設 Current 屬性回到 Cursors.Default 的資料指標之前呼叫 Application.DoEvents,應用程式將會繼續接聽滑鼠事件,並繼續為應用程式中的每個控制項顯示適當的 CursorIf you call Application.DoEvents before resetting the Current property back to the Cursors.Default cursor, the application will resume listening for mouse events and will resume displaying the appropriate Cursor for each control in the application.

資料指標物件可以從數個來源建立,例如現有 Cursor的控制碼、標準 Cursor 檔、資源或資料流程。Cursor objects can be created from several sources, such as the handle of an existing Cursor, a standard Cursor file, a resource, or a data stream.

注意

Cursor 類別不支援具有黑白色彩的動畫資料指標(ani 檔案)或資料指標。The Cursor class does not support animated cursors (.ani files) or cursors with colors other than black and white.

如果您用來做為資料指標的影像太小,您可以使用 DrawStretched 方法來強制影像填滿游標的範圍。If the image you are using as a cursor is too small, you can use the DrawStretched method to force the image to fill the bounds of the cursor. 您可以藉由呼叫 Hide 方法來暫時隱藏游標,並藉由呼叫 Show 方法來加以還原。You can temporarily hide the cursor by calling the Hide method, and restore it by calling the Show method.

從 .NET Framework 4.5.2 開始,當 app.config 檔案包含下列專案時,Cursor 會根據系統 DPI 設定調整大小:Starting with the .NET Framework 4.5.2, the Cursor will be resized based on the system DPI setting when the app.config file contains the following entry:

<appSettings>  
  <add key="EnableWindowsFormsHighDpiAutoResizing" value="true" />  
</appSettings>  

建構函式

Cursor(IntPtr)

從指定的視窗控制代碼,初始化 Cursor 類別的新執行個體。Initializes a new instance of the Cursor class from the specified Windows handle.

Cursor(Stream)

從指定的資料流,初始化 Cursor 類別的新執行個體。Initializes a new instance of the Cursor class from the specified data stream.

Cursor(String)

從指定的檔案,初始化 Cursor 類別的新執行個體。Initializes a new instance of the Cursor class from the specified file.

Cursor(Type, String)

從指定的資源,以指定的資源類型,初始化 Cursor 類別的新執行個體。Initializes a new instance of the Cursor class from the specified resource with the specified resource type.

屬性

Clip

取得或設定表示游標裁剪方框的範圍。Gets or sets the bounds that represent the clipping rectangle for the cursor.

Current

取得或設定表示滑鼠游標的游標物件。Gets or sets a cursor object that represents the mouse cursor.

Handle

取得游標的控制代碼。Gets the handle of the cursor.

HotSpot

取得游標作用點。Gets the cursor hot spot.

Position

取得或設定游標的位置。Gets or sets the cursor's position.

Size

取得游標物件的大小。Gets the size of the cursor object.

Tag

取得或設定物件,它包含 Cursor 相關資料。Gets or sets the object that contains data about the Cursor.

方法

CopyHandle()

複製這個 Cursor 的控制代碼。Copies the handle of this Cursor.

Dispose()

釋放 Cursor 所使用的所有資源。Releases all resources used by the Cursor.

Draw(Graphics, Rectangle)

在指定的表層和指定的範圍內繪製游標。Draws the cursor on the specified surface, within the specified bounds.

DrawStretched(Graphics, Rectangle)

在指定的表層和指定的範圍內,使用延伸格式繪製游標。Draws the cursor in a stretched format on the specified surface, within the specified bounds.

Equals(Object)

傳回值,指出這個游標是否等於指定的 CursorReturns a value indicating whether this cursor is equal to the specified Cursor.

Finalize()

允許物件在記憶體回收進行回收之前,嘗試釋放資源並執行其他清除作業。Allows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection.

GetHashCode()

擷取目前 Cursor 的雜湊碼。Retrieves the hash code for the current Cursor.

GetType()

取得目前執行個體的 TypeGets the Type of the current instance.

(繼承來源 Object)
Hide()

隱藏游標。Hides the cursor.

MemberwiseClone()

建立目前 Object 的淺層複製。Creates a shallow copy of the current Object.

(繼承來源 Object)
Show()

顯示游標。Displays the cursor.

ToString()

擷取表示這個 Cursor 的人類看得懂的字串。Retrieves a human readable string representing this Cursor.

運算子

Equality(Cursor, Cursor)

傳回值,指出 Cursor 類別的兩個執行個體是否相等。Returns a value indicating whether two instances of the Cursor class are equal.

Inequality(Cursor, Cursor)

傳回值,指出 Cursor 類別的兩個執行個體是否不相等。Returns a value indicating whether two instances of the Cursor class are not equal.

明確介面實作

ISerializable.GetObjectData(SerializationInfo, StreamingContext)

序列化物件。Serializes the object.

適用於

另請參閱