C#圖片存入數據庫及其讀出顯示

<1>將圖片轉換成二進制插入數據庫

        FileStream fs = new FileStream("D:\\Add.ico",FileMode.Open); 

        byte[] imagebytes = new byte[fs.Length];

        BinaryReader br = new BinaryReader(fs);

        imagebytes = br.ReadBytes(Convert.ToInt32(fs.Length));   //將圖片轉換成二進制字符串

        string s = "Data Source=A3135;Initial Catalog=mydb1;Integrated Security=True";  //連數據庫字符串

        SqlConnection con = new SqlConnection(s);

        con.Open();

        string str = " insert into [picture](Line,Data) values(@Line,@Data)";  //插入picture表中字符串

        SqlCommand cmd = new SqlCommand(str, con);

        cmd.Parameters.AddWithValue("@Line", 1);

        cmd.Parameters.AddWithValue("@Data", imagebytes);  //將二進制流插入數據庫中

        cmd.ExecuteNonQuery();

        con.Close();

<2>將二進制還原爲圖片

     MemoryStream ms = new MemoryStream(photo);

     Bitmap bmpt = new Bitmap(ms);   //將二進制流轉化成圖片格式

     SickPicture.Image = bmpt;   //SickPicture爲pictureBox控件名稱

<3>依據圖片路徑顯示圖片

      Image image = Image.FromFile(PicturePath);  //直接打開會出現再次添加時提示圖片資源佔用

      Image bmp = new Bitmap(image);

      SickPicture.Image = bmp;

      image.Dispose();

<4>PictureBox綁定圖片的等比縮放

      將pictureBox的SizeMode屬性設置爲StretchImage