本文整理汇总了VB.NET中System.Drawing.Graphics.FromImage方法的典型用法代码示例。如果您正苦于以下问题：VB.NET Graphics.FromImage方法的具体用法？VB.NET Graphics.FromImage怎么用？VB.NET Graphics.FromImage使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类System.Drawing.Graphics的用法示例。
在下文中一共展示了Graphics.FromImage方法的2个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的VB.NET代码示例。
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)
' 导入命名空间
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