本文整理匯總了VB.NET中System.Drawing.Graphics.FromImage方法的典型用法代碼示例。如果您正苦於以下問題：VB.NET Graphics.FromImage方法的具體用法？VB.NET Graphics.FromImage怎麽用？VB.NET Graphics.FromImage使用的例子？那麽, 這裏精選的方法代碼示例或許可以為您提供幫助。您也可以進一步了解該方法所在類System.Drawing.Graphics的用法示例。
在下文中一共展示了Graphics.FromImage方法的2個代碼示例，這些例子默認根據受歡迎程度排序。您可以為喜歡或者感覺有用的代碼點讚，您的評價將有助於係統推薦出更棒的VB.NET代碼示例。
示例1: SolidBrush
Private Sub FromImageImage2(ByVal e As PaintEventArgs)
' Create image.
Dim imageFile As Image = Image.FromFile("SampImag.jpg")
' Create graphics object for alteration.
Dim newGraphics As Graphics = Graphics.FromImage(imageFile)
' Alter image.
newGraphics.FillRectangle(New SolidBrush(Color.Black), _
100, 50, 100, 100)
' Draw image to screen.
e.Graphics.DrawImage(imageFile, New PointF(0.0F, 0.0F))
' Dispose of graphics object.
newGraphics.Dispose()
End Sub示例2: Graphics.FromImage(Bitmap m)
' 導入命名空間
Imports System
Imports System.Windows.Forms
Imports System.Collections.Generic
Imports System.ComponentModel
Imports System.Drawing.Imaging
Imports System.Drawing
Public Class MainClass
Shared Sub Main()
Dim bm As New Bitmap(256, 256)
' Draw on it.
Dim gr As Graphics = Graphics.FromImage(bm)
gr.Clear(Color.White)
gr.DrawEllipse(Pens.Red, 0, 0, bm.Width - 1, bm.Height - 1)
gr.DrawLine(Pens.Green, 0, 0, bm.Width - 1, bm.Height - 1)
gr.DrawLine(Pens.Blue, bm.Width - 1, 0, 0, bm.Height - 1)
' Save the result as a JPEG file.
bm.Save("test.gif", ImageFormat.Gif)
End Sub
End Class