byte[] filebytearray = new byte[filelength]; //图象文件临时储存byte数组 //stream streamobject = upfile.inputstream; //建立数据流对像 /////读取图象文件数据，filebytearray为数据储存体，0为数据指针位置、filelnegth为数据长度 //streamobject.rea
 byte[] filebytearray = new byte[filelength];  //图象文件临时储存byte数组
                //stream streamobject = upfile.inputstream;             //建立数据流对像  
                /////读取图象文件数据，filebytearray为数据储存体，0为数据指针位置、filelnegth为数据长度  
                //streamobject.read(filebytearray, 0, filelength);
                //streamobject = null;
                filestream fs = new filestream(fullfilepath, filemode.openorcreate);
                binaryreader rs = new binaryreader(fs);
                filebytearray = rs.readbytes(convert.toint32(fs.length));
                rs.close();
                rs = null;
                fs.close();
                fs = null;
                thenewfile.content = filebytearray;