winform把图片存储到数据库

1、先在Form中放一个PictureBox控件，再放三个按钮。

2、双击打开按钮，在里面写如下代码：

OpenFileDialog open1 = new OpenFileDialog();
            DialogResult isok = open1.ShowDialog();
            if (isok == DialogResult.OK)
            {
                string filename = open1.FileName;
                FileStream fs = new FileStream(filename,FileMode.Open);
                Image img = Image.FromStream(fs);
                pictureBox1.Image = img;
                fs.Close();
            }

3、双击存储到数据库按钮，在里面写如下代码：

OpenFileDialog open1 = new OpenFileDialog();
            DialogResult isok = open1.ShowDialog();
            if (isok == DialogResult.OK)
            {
                //根据路径读取图片，把图片存到数据库
                string filename = open1.FileName;
                FileStream fs = new FileStream(filename, FileMode.Open);
                BinaryReader br = new BinaryReader(fs);//二进制读取器
                byte[] buffer = br.ReadBytes((int)fs.Length);//图片数据进去到buffer中
                br.Close();
                fs.Close();
                SqlConnection conn = new SqlConnection("server=.;database=图片;user=sa;pwd=123");
                SqlCommand cmd = conn.CreateCommand();
                cmd.CommandText = "insert into tupian values(@image)";
                cmd.Parameters.Clear();
                cmd.Parameters.Add("@image", buffer);
                conn.Open();
                cmd.ExecuteNonQuery();
                conn.Close();
            }

4、双击读取数据库按钮，在里面写如下代码：

SqlConnection conn = new SqlConnection("server=.;database=图片;user=sa;pwd=123");
            SqlCommand cmd = conn.CreateCommand();
            cmd.CommandText = "select *from tupian where id=1";
            conn.Open();
            SqlDataReader dr = cmd.ExecuteReader();
            while(dr.Read())
            {
                byte[] buffer = (byte[])dr["image"];
                MemoryStream ms = new MemoryStream(buffer);
                Image img = Image.FromStream(ms);
                pictureBox1.Image = img;
            }
            conn.Close();