图片批量改尺寸
1 using System; 2 using System.Collections.Generic; 3 using System.ComponentModel; 4 using System.Data; 5 using System.Drawing; 6 using System.Linq; 7 using System.Text; 8 using System.Windows.Forms; 9 using System.IO; 10 using System.Threading; 11 12 namespace WindowsFormsApplication1 13 { 14 public partial class Form1 : Form 15 { 16 17 public delegate void MyInvoke(object str); 18 19 public Form1() 20 { 21 InitializeComponent(); 22 } 23 24 public void setProgress(object iValue ) 25 { 26 if( progressBar1.InvokeRequired ) 27 { 28 MyInvoke inv = new MyInvoke(setProgress); 29 this.Invoke(inv, new Object[] { iValue }); 30 } 31 else{ 32 progressBar1.Value = (int)iValue; 33 } 34 } 35 36 public void setMaximum(object iValue) 37 { 38 if (progressBar1.InvokeRequired) 39 { 40 MyInvoke inv = new MyInvoke(setMaximum); 41 this.Invoke(inv, new Object[] { iValue }); 42 } 43 else 44 { 45 progressBar1.Minimum = 0; 46 progressBar1.Maximum = (int)iValue; 47 progressBar1.Value = 0; 48 } 49 } 50 51 public void EnableButton(object iValue) 52 { 53 if (button1.InvokeRequired) 54 { 55 MyInvoke inv = new MyInvoke(EnableButton); 56 this.Invoke(inv, new Object[] { iValue }); 57 } 58 else 59 { 60 button1.Enabled = (bool)iValue; 61 } 62 } 63 64 65 public void DoWork(object thObj) 66 { 67 ResizeMethod((string)thObj); 68 EnableButton(true); 69 70 string str = string.Format("共转换完成图片{0}个!", progressBar1.Maximum); 71 72 MessageBox.Show(str); 73 } 74 75 76 77 78 private void button1_Click(object sender, EventArgs e) 79 { 80 FolderBrowserDialog dlg = new FolderBrowserDialog(); 81 if( dlg.ShowDialog() == DialogResult.OK ) 82 { 83 string strPath = dlg.SelectedPath; 84 Thread thread = new Thread(new ParameterizedThreadStart(DoWork)); 85 thread.Start(strPath); 86 } 87 88 } 89 90 private void ResizeMethod(string strPath) 91 { 92 string[] strFiles = Directory.GetFiles(strPath, "*.jpg", SearchOption.TopDirectoryOnly); 93 94 95 96 setMaximum( strFiles.Length ); 97 EnableButton(false); 98 int iCount = 0; 99 100 101 foreach (string ss in strFiles) 102 { 103 try 104 { 105 var img = Image.FromFile(ss); 106 107 108 double blk = (img.Width + 0.0) / 1024.0; 109 110 int newHeight = (int)(img.Height / blk); 111 112 Bitmap tempBitmap = new Bitmap(1024, newHeight); 113 114 Graphics gTempBitmap = System.Drawing.Graphics.FromImage(tempBitmap); 115 116 gTempBitmap.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.High; 117 gTempBitmap.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality; 118 gTempBitmap.Clear(Color.White); 119 120 121 gTempBitmap.DrawImage(img, new Rectangle(0, 0, 1024, newHeight), new Rectangle(0, 0, img.Width, img.Height), 122 GraphicsUnit.Pixel); 123 124 125 tempBitmap.Save(@"d:\img\" + Path.GetFileName(ss)); 126 127 gTempBitmap.Dispose(); 128 img.Dispose(); 129 tempBitmap.Dispose(); 130 131 132 if( iCount % 10 == 0 ) 133 { 134 GC.Collect(); 135 } 136 137 138 } 139 catch (System.Exception e1) 140 { 141 MessageBox.Show(e1.Message); 142 } 143 finally 144 { 145 iCount++; 146 setProgress(iCount); 147 } 148 149 } 150 } 151 } 152 }