我正在尝试将图像存储在SQL Server数据库中，应该使用哪种数据类型？

在下面的内容中code aspx.cs，我试图从请求输入流中读取所有字节并将其存储在数据库中，但是该byte[]数组在表中未正确更新。我想念什么吗？

protected void Page_Load(object sender, EventArgs e)
{
        Request.InputStream.Position = 0;

        byte[] Contents = new byte[Request.InputStream.Length];

        Request.InputStream.Read(Contents, 0, (int)Request.InputStream.Length);

        con.Open();

        try
        {
            string query = "update tblImageUpload set " + IMAGE_ID + " = @imageBytes where Image_ID='" + CID + "'";

            int i = 0;

            using (cmd = new SqlCommand(query, con))
            {
                cmd.Parameters.Add("@imageBytes", SqlDbType.VarBinary, Contents.Length).Value = Contents;

                 i = cmd.ExecuteNonQuery();
            }

            Response.Write("Upload Query = " + query);
            Response.Write("Upload Code = " + i);
        } catch (Exception ex) {
            Response.Write("Upload Code=" + ex);
        }