Asp.Netファイルアップロードクラス(ファイル接尾辞名を取得し、ファイルを保存し、文字透かしを加える)

 
  
using System; 
  
using System.Data; 
  
using System.Configuration; 
  
using System.Web; 
  
using System.Web.Security; 
  
using System.Web.UI; 
  
using System.Web.UI.WebControls; 
  
using System.Web.UI.WebControls.WebParts; 
  
using System.Web.UI.HtmlControls; 
  
using System.Drawing; 
  
using System.IO; 
  
using System.Drawing.Imaging; 
  
 
  
namespace EC 
  
{ 
  
/// 
 
  
///     
  
/// 
 
  
public class UploadObj 
  
{ 
  
 
  
public UploadObj() 
  
{ 
  
// 
  
// TODO:             
  
// 
  
} 
  
/// 
 
  
///             
  
/// 
 
  
public enum FileType 
  
{ 
  
jpg,gif,bmp,png 
  
} 
  
 
  
#region        
  
/// 
 
  
///        
  
/// 
 
  
///      
  
///  
  
public static string GetFileExtends(string filename) 
  
{ 
  
string ext = null; 
  
if (filename.IndexOf('.') > 0) 
  
{ 
  
string[] fs = filename.Split('.'); 
  
ext = fs[fs.Length - 1]; 
  
} 
  
return ext; 
  
} 
  
#endregion 
  
 
  
#region          
  
/// 
 
  
///            
  
/// 
 
  
///       
  
///  
  
public static bool CheckFileExtends(string fileExtends) 
  
{ 
  
bool status = false; 
  
fileExtends = fileExtends.ToLower(); 
  
string[] fe = Enum.GetNames(typeof(FileType)); 
  
for (int i = 0; i < fe.Length; i++) 
  
{ 
  
if (fe[i].ToLower() == fileExtends) 
  
{ 
  
status = true; 
  
break; 
  
} 
  
} 
  
return status; 
  
} 
  
#endregion 
  
 
  
#region      
  
/// 
 
  
///      
  
/// 
 
  
///    ,Server.MapPath() 
  
///      
  
///  
  
public static string PhotoSave(string fpath,FileUpload myFileUpload) 
  
{ 
  
string s = ""; 
  
string fileExtends = ""; 
  
string fileName = myFileUpload.FileName; 
  
if (fileName != "") 
  
{ 
  
//       
  
fileExtends = EC.UploadObj.GetFileExtends(fileName); 
  
if (!EC.UploadObj.CheckFileExtends(fileExtends)) 
  
{ 
  
EC.MessageObject.ShowPre("         "); 
  
} 
  
Random rd = new Random(); 
  
s = EC.RandomObject.DateRndName(rd) + "." + fileExtends; 
  
string file = fpath + "\\" + s; 
  
try 
  
{ 
  
myFileUpload.SaveAs(file); 
  
} 
  
catch (Exception ee) 
  
{ 
  
throw new Exception(ee.ToString()); 
  
} 
  
} 
  
return s; 
  
} 
  
 
  
#endregion 
  
 
  
#region        
  
 
  
/// 
 
  
///        
  
/// 
 
  
///       (   ) 
  
///    
  
public void AddTextToImg(string fileName, string text) 
  
{ 
  
if (!File.Exists(fileName)) 
  
{ 
  
throw new FileNotFoundException("     "); 
  
} 
  
if (text == string.Empty) 
  
{ 
  
return; 
  
} 
  
//              
  
 
  
System.Drawing.Image image = System.Drawing.Image.FromFile(fileName); 
  
Bitmap bitmap = new Bitmap(image, image.Width, image.Height); 
  
Graphics g = Graphics.FromImage(bitmap); 
  
float fontSize = 12.0f;//     
  
float textWidth = text.Length * fontSize;//      
  
//          ,                
  
float rectX = 0; 
  
float rectY = 0; 
  
float rectWidth = text.Length * (fontSize + 8); 
  
float rectHeight = fontSize + 8; 
  
//      
  
RectangleF textArea = new RectangleF(rectX, rectY, rectWidth, rectHeight); 
  
Font font = new Font("  ", fontSize);//     
  
Brush whiteBrush = new SolidBrush(Color.White);//   ,     
  
Brush blackBrush = new SolidBrush(Color.Black);//   ，     
  
g.FillRectangle(blackBrush, rectX, rectY, rectWidth, rectHeight); 
  
g.DrawString(text, font, whiteBrush, textArea); 
  
MemoryStream ms = new MemoryStream(); 
  
bitmap.Save(ms, ImageFormat.Jpeg); 
  
//        ，        ，            
  
//Response.Clear(); 
  
//Response.ContentType = "image/jpeg"; 
  
//Response.BinaryWrite(ms.ToArray()); 
  
g.Dispose(); 
  
bitmap.Dispose(); 
  
image.Dispose(); 
  
} 
  
#endregion 
  
} 
  
}