PictureBox中的Image对象（或者图片）转存到数据库

主要有两个点：

1.图片Image对象 ”保存“到MemoryStream中；

image.Save(mstream, System.Drawing.Imaging.ImageFormat.Jpeg);

2.二进制数据插入到数据库的操作。

SqlParameter param = new SqlParameter("ImgData", SqlDbType.VarBinary, imageBytes.Length);
param.Value = imageBytes;
cmd.Parameters.Add(param);

　　

下面贴上代码

       private void button1_Click(object sender, EventArgs e)
        {
            byte[] imageBytes = GetImageBytes(pictureBox1.Image);

            string connStr = "SQL Server连接字符串";

            using (SqlConnection conn = new SqlConnection(connStr))
            {
                string sql = "Insert Into T_Img Values (@ImgData) ";
                using (SqlCommand cmd = new SqlCommand(sql))
                {
                    SqlParameter param = new SqlParameter("ImgData", SqlDbType.VarBinary, imageBytes.Length);
                    param.Value = imageBytes;
                    cmd.Parameters.Add(param);

                    cmd.Connection = conn;
                    conn.Open();
                    int i = cmd.ExecuteNonQuery();
                    MessageBox.Show(i.ToString());
                }
            }
        }
        private byte[] GetImageBytes(Image image)
        {
            MemoryStream mstream = new MemoryStream();
            image.Save(mstream, System.Drawing.Imaging.ImageFormat.Jpeg);
            byte[] byteData = new Byte[mstream.Length];
            mstream.Position = 0;
            mstream.Read(byteData, 0, byteData.Length);
            mstream.Close();
            return byteData;
        }