（后台）批量修改图片大小

一个外文站点看到的。直接贴代码吧。外文就不翻译了。

功能很简单，就是在后台直接修改图片大小，也就是超过区域的部分被切掉了。如果扩大图片的话，恐怕有的区域（边缘）什么都没有哦。

没有实施过，如果不好用情通知我，c#代码自己写了。雷

''' <summary> ''' Resize the target image, save it to new location and delete old one. ''' </summary> ''' <param name="strFileName">Original/Source File Name.</param> ''' <remarks> ''' Imports System.IO at the beginning. ''' This is tested and work well on Windows CE 5.0 based HandHeld Terminals only. ''' Not tested in another platform yet. ''' </remarks> ''' <Owner>By SCSFDEV @ March 10, 2009 (9:55 AM)</Owner> ''' <contact>[e-mail]</contact> Private Sub ResizeNMoveImage(ByVal strFileName As String) Try ' Create a bitmap file for original image. Dim srcmap As New Bitmap(strFileName) ' This is where the new image will temp stored. 150x150. Dim destbit As New Bitmap(150, 150) ' The size of the source image. Dim srcRec As New Rectangle(0, 0, srcmap.Width, srcmap.Height) ' The size of the destination image. Dim destRec As New Rectangle(0, 0, 150, 150) ' Start a graphics whose host is new bitmap. Dim g As Graphics g = Graphics.FromImage(destbit) ' Load image in graphics. g.DrawImage(srcmap, destRec, srcRec, GraphicsUnit.Pixel) ' Define the destination target location file path. Dim strPath As String = "" strPath = Path.GetDirectoryName(System.Reflection.Assembly.GetExecutingAssembly.GetName.CodeBase) ' Save the new image to the above location with whatever file name you want. ' Eg > "Your application path/image/a.jpeg". ' or > "Program Files/[application name]/image/a.jpeg". destbit.Save(strPath & "/image/a.jpeg", Imaging.ImageFormat.Jpeg) ' If Old file exist? If File.Exists(strFileName) Then ' Delete it. File.Delete(strFileName) End If Catch ex As Exception ' If there is some exception, Show it on screen. (Not recommented for End user. ' Should display some message instead of this ex.message and should write to Log file for developers to debug.) MessageBox.Show(ex.Message, "Error@ResizeNMoveImage", MessageBoxButtons.OK, MessageBoxIcon.Hand, _ MessageBoxDefaultButton.Button1) End Try End Sub