C# asp.net 图片存进数据库二进制和读取

protected void Button1_Click(object sender, EventArgs e)
    {

        ///////////////////////////////////
        string name = FileUpload1.PostedFile.FileName;
        string type = name.Substring(name.LastIndexOf(".") + 1);
        FileStream fs = File.OpenRead(name);
        byte[] content = new byte[fs.Length];
        fs.Read(content, 0, content.Length);
        fs.Close();
        SqlConnection cn = new SqlConnection("Data Source=4-05\\SQLEXPRESS;Initial Catalog=News123;Integrated Security=True");
        SqlCommand cm = new SqlCommand("insert into image(image) values(@image)", cn);
        cn.Open();
        if (type == "jpg" || type == "gif" || type == "bmp" || type == "png")
        {
            cm.Parameters.Add("@image", SqlDbType.Image);
            cm.Parameters["@image"].Value = content;
            cm.ExecuteNonQuery();
            cn.Close();
        }

        Response.Write("保存成功");



    }
    protected void Button2_Click(object sender, EventArgs e)
    {
         SqlConnection cn= new SqlConnection("Data Source=4-05\\SQLEXPRESS;Initial Catalog=News123;Integrated Security=True");