批量修改圖片的尺寸(c#)

項目需要，經常需要手動調整圖片尺寸，流程太過麻煩 ，效率低下 。所以寫了一個小程序，以提高工作效率

   
   
   
           

    
    
    
            
using System;
    
    
    
            
using System.Collections.Generic;
    
    
    
            
using System.Linq;
    
    
    
            
using System.Text;
    
    
    
            
using System.Threading.Tasks;
    
    
    
            
using System.IO;
    
    
    
            
using System.Drawing;
    
    
    
            
using System.Drawing.Imaging;
    
    
    
            

    
    
    
            
namespace ChangeImgSize
    
    
    
            
{
    
    
    
            
 class Program
    
    
    
            
 {
    
    
    
            
 static void Main(string[] args)
    
    
    
            
 {
    
    
    
            
 int num = 0;
    
    
    
            
 if (!System.IO.Directory.Exists("Img"))
    
    
    
            
 {
    
    
    
            
 System.IO.Directory.CreateDirectory("Img");
    
    
    
            
 Console.WriteLine("已創建Img目錄，請把需要處理的圖片放到該目錄下");
    
    
    
            
 Console.ReadKey(true);
    
    
    
            
 return;
    
    
    
            
 }
    
    
    
            
 if (!System.IO.Directory.Exists("NewImg"))
    
    
    
            
 {
    
    
    
            
 System.IO.Directory.CreateDirectory("NewImg");
    
    
    
            
 }
    
    
    
            
 Console.WriteLine("請輸入需要縮小的倍數");
    
    
    
            
 double size = Convert.ToDouble(Console.ReadLine());
    
    
    
            
 string[] fileStrs = System.IO.Directory.GetFiles("Img");
    
    
    
            
 foreach (string s in fileStrs)
    
    
    
            
 {
    
    
    
            
 System.IO.FileInfo info = new System.IO.FileInfo(s);
    
    
    
            
 if (info.Extension == ".png" || info.Extension == ".jpg")
    
    
    
            
 {
    
    
    
            
 Image img = GetFile(s);
    
    
    
            
 Bitmap bit = GetNewSizeBitmap(img,size);
    
    
    
            
 SaveImage(bit, info.Name, info.Extension);
    
    
    
            
 }
    
    
    
            
 ++num;
    
    
    
            
 }
    
    
    
            
 Console.WriteLine("共處理：" + num + "張圖片，已經保存到NewImg目錄中。");
    
    
    
            
 Console.ReadKey(true);
    
    
    
            
 }
    
    
    
            

    
    
    
            
 static public Image GetFile(string path)
    
    
    
            
 {
    
    
    
            
 FileStream stream = File.OpenRead(path);
    
    
    
            
 int fileLength = 0;
    
    
    
            
 fileLength = (int)stream.Length;
    
    
    
            
 Byte[] image = new Byte[fileLength];
    
    
    
            
 stream.Read(image, 0, fileLength);
    
    
    
            
 System.Drawing.Image result = System.Drawing.Image.FromStream(stream);
    
    
    
            
 stream.Close();
    
    
    
            
 return result;
    
    
    
            
 }
    
    
    
            

    
    
    
            
 static public Bitmap GetNewSizeBitmap(Image img , double size){
    
    
    
            
 int newWidth = Convert.ToInt32(img.Width / size);
    
    
    
            
 int newHeight = Convert.ToInt32(img.Height / size);
    
    
    
            
 Size s = new Size(newWidth, newHeight);
    
    
    
            
 Bitmap newBit = new Bitmap(img, s);
    
    
    
            
 return newBit;
    
    
    
            
 }
    
    
    
            

    
    
    
            
 static public void SaveImage(Bitmap bit,string name,string ext)
    
    
    
            
 {
    
    
    
            
 bit.Save(@"NewImg\" + name);
    
    
    
            
 bit.Dispose();
    
    
    
            
 Console.WriteLine("已處理:" + name);
    
    
    
            
 }
    
    
    
            

    
    
    
            
 }
    
    
    
            
}
   
   
   
           

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