Save pictures to database and C # read pictures

The picture is saved to the database, if SQL Server is the image type, if it is saved to Oracle is the BLOB type, in C # corresponds to the byte[] type, and only need to cast the read data to the line (byte[]) object .

1. Save the picture as a byte array

parameter is picture path, return byte[] Type

 Public byte [] Getpicturedata (string  ImagePath)    {       new  FileStream (ImagePath, FileMode.Open);        byte New byte [File. Length];        0 , by. Length);       File. Close ();        return by ;    }

parameter is image, return byte[] Type

 Public byte[] Getpicturedata (System.Drawing.Image imgphoto) {//convert image to stream data and save as byte[]MemoryStream Mstream=NewMemoryStream ();       Imgphoto.save (mstream,system.drawing.imaging.imageformat.bmp); byte[]bydata=NewByte[mstream.       Length]; Mstream. Position=0; Mstream. Read (Bydata,0, bydata.length); Mstream.       Close (); returnBydata; }  

2. Converting a byte array to a picture

//parameter is a byte[] type, and the return value is an Image object     PublicSystem.Drawing.Image Returnphoto (byte[] streambyte) {MemoryStream me=NewMemoryStream (Streambyte); returnSystem.Drawing.Image.FromStream (MS); }      //parameter is a byte[] type, there is no return value, which is for ASP. Export the picture from the output to the Web page     Public voidWritephoto (byte[] streambyte) {Response.ContentType="Image/gif";    Response.BinaryWrite (Streambyte); }

3. Conversion of Byte[] and string

    // byte[] Convert to string    byte [] by;     string str=System.Convert.ToBase64String (by);     // convert String to byte[]    string str;     byte [] by=system.convert.frombase64string (str);

Save pictures to database and C # read pictures