MouseEventArgs 類別

定義

public ref class MouseEventArgs : EventArgs

[System.Runtime.InteropServices.ComVisible(true)]
public class MouseEventArgs : EventArgs

public class MouseEventArgs : EventArgs

[<System.Runtime.InteropServices.ComVisible(true)>]
type MouseEventArgs = class
    inherit EventArgs

type MouseEventArgs = class
    inherit EventArgs

Public Class MouseEventArgs
Inherits EventArgs

繼承

Object

EventArgs

MouseEventArgs

衍生

System.Windows.Forms.DataGridViewCellMouseEventArgs

System.Windows.Forms.HandledMouseEventArgs

System.Windows.Forms.StatusBarPanelClickEventArgs

System.Windows.Forms.TreeNodeMouseClickEventArgs

屬性

ComVisibleAttribute

範例

下列程式碼範例會 MouseDown 處理 控制項上的 TextBox 事件，讓按一下滑鼠右鍵會選取控制項中的所有文字。 此範例需要您有一個表單，其中包含 TextBox 名為 textBox1 的控制項。

private void Form1_Load(object sender, EventArgs e)
{
    // This line suppresses the default context menu for the TextBox control. 
    textBox1.ContextMenu = new ContextMenu();
    textBox1.MouseDown += new MouseEventHandler(textBox1_MouseDown);
}

void textBox1_MouseDown(object sender, System.Windows.Forms.MouseEventArgs e)
{
    if (e.Button == MouseButtons.Right)
    {
        textBox1.Select(0, textBox1.Text.Length);
    }
}

Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
    TextBox1.ContextMenu = New ContextMenu()
End Sub

Private Sub TextBox1_MouseDown(ByVal sender As Object, ByVal e As System.Windows.Forms.MouseEventArgs) Handles TextBox1.MouseDown
    If (e.Button = Windows.Forms.MouseButtons.Right) Then
        TextBox1.Select(0, TextBox1.Text.Length)
    End If
End Sub

下列程式碼範例會 Location 使用 屬性來追蹤滑鼠左鍵的點選，並繪製一系列的直線線段，以回應使用者輸入。 如果您隱藏表單，然後重新顯示該表單，則此範例不會重新繪製行;為了簡單起見，已省略此程式碼。

Point firstPoint;
Boolean haveFirstPoint;

public void EnableDrawing()
{
    this.MouseDown += new MouseEventHandler(Form1_MouseDownDrawing);
}

void Form1_MouseDownDrawing(object sender, System.Windows.Forms.MouseEventArgs e)
{
    if (haveFirstPoint)
    {
        Graphics g = this.CreateGraphics();
        g.DrawLine(Pens.Black, firstPoint, e.Location);
        haveFirstPoint = false;
    }
    else
    {
        firstPoint = e.Location;
        haveFirstPoint = true;
    }
}

Dim FirstPoint As Point
Dim HaveFirstPoint As Boolean = False

Private Sub Form1_MouseDownDrawing(ByVal sender As Object, ByVal e As System.Windows.Forms.MouseEventArgs) Handles Me.MouseDown
    If HaveFirstPoint Then
        Dim g As Graphics = Me.CreateGraphics()
        g.DrawLine(Pens.Black, FirstPoint, e.Location)
        HaveFirstPoint = False
    Else
        FirstPoint = e.Location
        HaveFirstPoint = True
    End If
End Sub

下列程式碼範例會使用 X 和 Y 屬性，在視窗中顯示滑鼠指標 ToolTip 的目前位置。

ToolTip trackTip;

private void TrackCoordinates()
{
    trackTip = new ToolTip();
    this.MouseMove += new MouseEventHandler(Form1_MouseMove);
}

void Form1_MouseMove(object sender, System.Windows.Forms.MouseEventArgs e)
{
    String tipText = String.Format("({0}, {1})", e.X, e.Y);
    trackTip.Show(tipText, this, e.Location);
}

Dim TrackTip As ToolTip

Private Sub TrackCoordinates()
    TrackTip = New ToolTip()
End Sub

Private Sub Form1_MouseMove(ByVal sender As Object, ByVal e As System.Windows.Forms.MouseEventArgs) Handles Me.MouseMove
    Dim TipText As String = String.Format("({0}, {1})", e.X, e.Y)
    TrackTip.Show(TipText, Me, e.Location)
End Sub

備註

當使用者在指標位於控制項上方時按下滑鼠按鍵時，就會發生此 MouseDown 事件。 當使用者 MouseUp 放開滑鼠按鍵時，指標停留在控制項上時，就會發生此事件。 當使用者將滑鼠指標移至控制項上方時，就會發生此 MouseMove 事件。 會 MouseEventArgs 指定按下哪一個滑鼠按鍵、按下和放開滑鼠按鍵的次數、滑鼠座標，以及滑鼠滾輪移動的數量。

如果使用者在放開滑鼠按鍵之前將焦點切換到另一個 MouseDown 應用程式，則可能會收到沒有對應 MouseUp 的事件。

、 AxHost 和 NotifyIcon 類別存在 Control 這三個事件。

如需事件模型的相關資訊，請參閱 處理和引發事件。

另請參閱

• OnMouseDown(MouseEventArgs)
• MouseDown
• OnMouseUp(MouseEventArgs)
• MouseUp
• OnMouseMove(MouseEventArgs)
• MouseMove
• MouseDown
• MouseUp
• MouseMove