一、从文件加载
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click Dim strFilename1 As String Dim Pic1 As System.Drawing.Image strFilename1 = "c:\1.png" Pic1 = System.Drawing.Image.FromFile(strFilename1) PictureBox1.SizeMode = PictureBoxSizeMode.StretchImage 'PictureBox1.Image = Pic1 Dim Pic2 As System.Drawing.Image Dim strFilename2 As String = "c:\2.png " Pic2 = System.Drawing.Image.FromFile(strFilename2) Dim b As New System.Drawing.Bitmap(Pic2.Width, Pic2.Height, PixelFormat.Format32bppArgb) '这个地方是做透明处理结果的 Dim g As Graphics = Graphics.FromImage(b) g.Clear(Color.Transparent) g.DrawImage(Pic2, New Rectangle(0, 0, Pic2.Width, Pic2.Height), New Rectangle(0, 0, Pic2.Width, Pic2.Height), GraphicsUnit.Pixel) g.DrawImage(Pic1, New Rectangle(0, 0, Pic1.Width, Pic1.Height), New Rectangle(0, 0, Pic1.Width, Pic1.Height), GraphicsUnit.Pixel) PictureBox1.Image = b PictureBox1.BackColor = Color.Transparent 'b.Save("c:\3.png") End Sub
'从资源文件中加载 Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click Dim Pic1 As System.Drawing.Image Pic1 = My.Resources._1 Dim Pic2 As System.Drawing.Image Pic2 = My.Resources._2 Dim b As New System.Drawing.Bitmap(Pic2.Width, Pic2.Height, PixelFormat.Format32bppArgb) '这个地方是做透明处理结果的 Dim g As Graphics = Graphics.FromImage(b) g.Clear(Color.Transparent) g.DrawImage(Pic2, New Rectangle(0, 0, Pic2.Width, Pic2.Height), New Rectangle(0, 0, Pic2.Width, Pic2.Height), GraphicsUnit.Pixel) g.DrawImage(Pic1, New Rectangle(0, 0, Pic1.Width, Pic1.Height), New Rectangle(0, 0, Pic1.Width, Pic1.Height), GraphicsUnit.Pixel) PictureBox1.Image = b PictureBox1.BackColor = Color.Transparent '这个地方是做透明处理结果的 PictureBox1.SizeMode = PictureBoxSizeMode.StretchImage ' b.Save("c:\3.png") End Sub