asp.Net(C#)圧縮画像、画像テンプレートの高さと幅を指定できます

 
  
//        
  
//    ：     、       、   、    
  
// ：              
  
public static void MakeSmallImg(System.IO.Stream fromFileStream, string fileSaveUrl, System.Double templateWidth, System.Double templateHeight) 
  
{ 
  
//         ，               
  
System.Drawing.Image myImage = System.Drawing.Image.FromStream(fromFileStream, true); 
  
//    、  
  
System.Double newWidth = myImage.Width, newHeight = myImage.Height; 
  
//         
  
if (myImage.Width > myImage.Height || myImage.Width == myImage.Height) 
  
{ 
  
if (myImage.Width > templateWidth) 
  
{ 
  
//    ，       
  
newWidth = templateWidth; 
  
newHeight = myImage.Height * (newWidth / myImage.Width); 
  
} 
  
} 
  
//         
  
else 
  
{ 
  
if (myImage.Height > templateHeight) 
  
{ 
  
//    ，       
  
newHeight = templateHeight; 
  
newWidth = myImage.Width * (newHeight / myImage.Height); 
  
} 
  
} 
  
//       
  
System.Drawing.Size mySize = new Size((int)newWidth, (int)newHeight); 
  
//    bmp   
  
System.Drawing.Image bitmap = new System.Drawing.Bitmap(mySize.Width, mySize.Height); 
  
//       
  
System.Drawing.Graphics g = System.Drawing.Graphics.FromImage(bitmap); 
  
//         
  
g.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.High; 
  
//     ,          
  
g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality; 
  
//       
  
g.Clear(Color.White); 
  
//        
  
g.DrawImage(myImage, new System.Drawing.Rectangle(0, 0, bitmap.Width, bitmap.Height), 
  
new System.Drawing.Rectangle(0, 0, myImage.Width, myImage.Height), 
  
System.Drawing.GraphicsUnit.Pixel); 
  
///     
  
//System.Drawing.Graphics G=System.Drawing.Graphics.FromImage(bitmap); 
  
//System.Drawing.Font f=new Font("  ",10); 
  
//System.Drawing.Brush b=new SolidBrush(Color.Black); 
  
//G.DrawString("myohmine",f,b,10,10); 
  
//G.Dispose(); 
  
///     
  
//System.Drawing.Image copyImage = System.Drawing.Image.FromFile(System.Web.HttpContext.Current.Server.MapPath("pic/1.gif")); 
  
//Graphics a = Graphics.FromImage(bitmap); 
  
//a.DrawImage(copyImage, new Rectangle(bitmap.Width-copyImage.Width,bitmap.Height-copyImage.Height,copyImage.Width, copyImage.Height),0,0, copyImage.Width, copyImage.Height, GraphicsUnit.Pixel); 
  
//copyImage.Dispose(); 
  
//a.Dispose(); 
  
//copyImage.Dispose(); 
  
//      
  
bitmap.Save(fileSaveUrl, System.Drawing.Imaging.ImageFormat.Jpeg); 
  
g.Dispose(); 
  
myImage.Dispose(); 
  
bitmap.Dispose(); 
  
} 
  
 
 

 
  
private void button2_Click(object sender, EventArgs e) 
  
{ 
  
OpenFileDialog fileDialog = new OpenFileDialog(); 
  
fileDialog.Title = "      "; 
  
// fileDialog.Filter = "excel files (*.xls)|*.xls"; 
  
fileDialog.FilterIndex = 1; 
  
if (fileDialog.ShowDialog() == System.Windows.Forms.DialogResult.OK) 
  
{ 
  
 
  
System.IO.FileStream file =System.IO.File.Open(fileDialog.FileName,System.IO.FileMode.Open); 
  
System.IO.Stream strea = file; 
  
file.Close(); 
  
MakeSmallImg(strea, "   .jpg", 150, 150); 
  
// file.Close(); 
  
 
  
} 
  
}