LoveDotNet, я считаю, что есть небольшая проблема с вашим исходным кодом, следующая строка:
Graph.CopyFromScreen(area.X, area.Y, area.Y, area.Y, BitmapSize)
Должно быть:
Graph.CopyFromScreen(area.X, area.Y, 0, 0, BitmapSize)
Кроме того, просто быстрый совет всем, кто хочет использовать этот код, вы можете вызвать его следующим образом:
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim img As Image = SnippingTool.Snip(Screen.AllScreens(0)) 'Set to (1) for secondary monitor'
End Sub
Кроме того, при создании формы SnippingTool обязательно измените StartPosition свойство для Manual.
Большое редактирование:
Я проделал некоторую работу по поддержке нескольких мониторов одновременно, что не требует от разработчика выбора, какоймонитор для использования (это клонирует «Snipping Tool» немного ближе).
В основном я перебираю все экраны, чтобы найти минимальные X и Y координаты и самые большие Right и Bottom, это позволяет нам оценить полный размер «Виртуального монитора»:
Я протестировал его с моей конфигурацией:
Primary 1280x800
Secondary 1280x1024 w/ -224 X offset
Код:
'SnippingTool Code: Place this in a new form (set the StartUp Property to Manual)'
Public Class SnippingTool
Private Shared _Screen As Screen
Private Shared BitmapSize As Size
Private Shared Graph As Graphics
Private Structure MultiScreenSize
Dim minX As Integer
Dim minY As Integer
Dim maxRight As Integer
Dim maxBottom As Integer
End Structure
Private Shared Function FindMultiScreenSize() As MultiScreenSize
Dim minX As Integer = Screen.AllScreens(0).Bounds.X
Dim minY As Integer = Screen.AllScreens(0).Bounds.Y
Dim maxRight As Integer = Screen.AllScreens(0).Bounds.Right
Dim maxBottom As Integer = Screen.AllScreens(0).Bounds.Bottom
For Each aScreen As Screen In Screen.AllScreens
If aScreen.Bounds.X < minX Then
minX = aScreen.Bounds.X
End If
If aScreen.Bounds.Y < minY Then
minY = aScreen.Bounds.Y
End If
If aScreen.Bounds.Right > maxRight Then
maxRight = aScreen.Bounds.Right
End If
If aScreen.Bounds.Bottom > maxBottom Then
maxBottom = aScreen.Bounds.Bottom
End If
Next
Dim m_MultiScreenSize As MultiScreenSize
With m_MultiScreenSize
.minX = minX
.minY = minY
.maxBottom = maxBottom
.maxRight = maxRight
End With
Return m_MultiScreenSize
End Function
Public Shared Function Snip() As Image
Dim m_MultiScreenSize As MultiScreenSize = FindMultiScreenSize()
Dim bmp As New Bitmap(m_MultiScreenSize.maxRight - m_MultiScreenSize.minX, _
m_MultiScreenSize.maxBottom - m_MultiScreenSize.minY, _
System.Drawing.Imaging.PixelFormat.Format32bppPArgb)
Dim gr As Graphics = Graphics.FromImage(bmp)
Graph = gr
gr.SmoothingMode = Drawing2D.SmoothingMode.None
BitmapSize = bmp.Size
Using snipper = New SnippingTool(bmp)
snipper.Location = New Point(m_MultiScreenSize.minX, m_MultiScreenSize.minY)
If snipper.ShowDialog() = DialogResult.OK Then
Return snipper.Image
End If
End Using
Return Nothing
End Function
Public Sub New(ByVal screenShot As Image)
InitializeComponent()
Me.BackgroundImage = screenShot
Me.ShowInTaskbar = False
Me.FormBorderStyle = FormBorderStyle.None
Me.DoubleBuffered = True
End Sub
Public Property Image() As Image
Get
Return m_Image
End Get
Set(ByVal value As Image)
m_Image = Value
End Set
End Property
Private m_Image As Image
Private rcSelect As New Rectangle()
Private pntStart As Point
Protected Overrides Sub OnMouseDown(ByVal e As MouseEventArgs)
' Start the snip on mouse down'
If e.Button <> MouseButtons.Left Then
Return
End If
pntStart = e.Location
rcSelect = New Rectangle(e.Location, New Size(0, 0))
Me.Invalidate()
End Sub
Protected Overrides Sub OnMouseMove(ByVal e As MouseEventArgs)
' Modify the selection on mouse move'
If e.Button <> MouseButtons.Left Then
Return
End If
Dim x1 As Integer = Math.Min(e.X, pntStart.X)
Dim y1 As Integer = Math.Min(e.Y, pntStart.Y)
Dim x2 As Integer = Math.Max(e.X, pntStart.X)
Dim y2 As Integer = Math.Max(e.Y, pntStart.Y)
rcSelect = New Rectangle(x1, y1, x2 - x1, y2 - y1)
Me.Invalidate()
End Sub
Protected Overrides Sub OnMouseUp(ByVal e As MouseEventArgs)
' Complete the snip on mouse-up'
If rcSelect.Width <= 0 OrElse rcSelect.Height <= 0 Then
Return
End If
Image = New Bitmap(rcSelect.Width, rcSelect.Height)
Using gr As Graphics = Graphics.FromImage(Image)
gr.DrawImage(Me.BackgroundImage, New Rectangle(0, 0, Image.Width, Image.Height), _
rcSelect, GraphicsUnit.Pixel)
End Using
DialogResult = DialogResult.OK
End Sub
Protected Overrides Sub OnPaint(ByVal e As PaintEventArgs)
' Draw the current selection'
Using br As Brush = New SolidBrush(Color.FromArgb(120, Color.White))
Dim x1 As Integer = rcSelect.X
Dim x2 As Integer = rcSelect.X + rcSelect.Width
Dim y1 As Integer = rcSelect.Y
Dim y2 As Integer = rcSelect.Y + rcSelect.Height
e.Graphics.FillRectangle(br, New Rectangle(0, 0, x1, Me.Height))
e.Graphics.FillRectangle(br, New Rectangle(x2, 0, Me.Width - x2, Me.Height))
e.Graphics.FillRectangle(br, New Rectangle(x1, 0, x2 - x1, y1))
e.Graphics.FillRectangle(br, New Rectangle(x1, y2, x2 - x1, Me.Height - y2))
End Using
Using pen As New Pen(Color.Red, 3)
e.Graphics.DrawRectangle(pen, rcSelect)
End Using
End Sub
Protected Overrides Function ProcessCmdKey(ByRef msg As Message, ByVal keyData As Keys) As Boolean
' Allow canceling the snip with the Escape key'
If keyData = Keys.Escape Then
Me.DialogResult = DialogResult.Cancel
End If
Return MyBase.ProcessCmdKey(msg, keyData)
End Function
Protected Overrides Sub OnLoad(ByVal e As System.EventArgs)
MyBase.OnLoad(e)
Dim m_MultiScreenSize As MultiScreenSize = FindMultiScreenSize()
Me.Size = New Size(m_MultiScreenSize.maxRight - m_MultiScreenSize.minX, _
m_MultiScreenSize.maxBottom - m_MultiScreenSize.minY)
Graph.CopyFromScreen(m_MultiScreenSize.minX, m_MultiScreenSize.minY, 0, 0, BitmapSize)
End Sub
End Class
И вы можете назвать это лиКе это:
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim img As Image = SnippingTool.Snip()
img.Save("C:\ScreenShot.png")
End Sub