c# 미리 보기 그림을 틀리지 않게 만드는 방법 실례 공유

 
  
/// 
 
  
///       
  
/// 
 
  
///  
  
  public bool GetThumbImg() 
  
{ 
  
try 
  
{ 
  
string imgpath; //     
  
     if(imgsourceurl.IndexOf("\",0)<0) //         
  
     { 
  
imgpath = HttpContext.Current.Server.MapPath(imgsourceurl); //        
  
     } 
  
else 
  
{ 
  
imgpath=imgsourceurl; 
  
} 
  
System.Drawing.Image sourceImage = System.Drawing.Image.FromFile(imgpath); 
  
int width = sourceImage.Width; 
  
int height = sourceImage.Height; 
  
if(thumbwidth <= 0) 
  
{ 
  
thumbwidth = 120; 
  
} 
  
if(thumbwidth >= width) 
  
{ 
  
return false; 
  
} 
  
else 
  
{ 
  
(thumbwidth,thHeight*thumbwidth/thWidth,null,IntPtr.Zero); 
  
Image imgThumb=new System.Drawing.Bitmap(thumbwidth,height*thumbwidth/width); 
  
System.Drawing.Graphics g = System.Drawing.Graphics.FromImage(imgThumb); 
  
g.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.HighQualityBicubic; 
  
g.DrawImage(sourceImage, new Rectangle(0, 0, thumbwidth,height*thumbwidth/width), 0, 0, width, height, GraphicsUnit.Pixel); 
  
string thumbpath=""; 
  
sourceImage.Dispose(); 
  
if(thumburl=="") 
  
{ 
  
thumbpath=imgpath; 
  
} 
  
if(thumbpath.IndexOf("\",0)<0)//         
  
      { 
  
thumbpath=HttpContext.Current.Server.MapPath(thumburl);//        
  
      } 
  
imgThumb.Save(thumbpath,ImageFormat.Jpeg); 
  
imgThumb.Dispose(); 
  
return true; 
  
} 
  
} 
  
catch 
  
{ 
  
throw; 
  
} 
  
}