ASP.net(c#)將圖片以二進位格式儲存到資料庫中

using System.Data.SqlClient;
public partial class _Default : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {

    }
    protected void Button1_Click(object sender, EventArgs e)
    {
        try
        {
           
            string ImgPath = FileUpload1.PostedFile.FileName;
            string ImgName = ImgPath.Substring(ImgPath.LastIndexOf("//") + 1);
            string ImgExtend = ImgPath.Substring(ImgPath.LastIndexOf(".") + 1);
            if (!(ImgExtend == "bmp" || ImgExtend == "jpg" || ImgExtend == "gif"))
            {
                Label3.Text = "上傳圖片的格式不正確！";
                return;
            }
            int FileLen = this.FileUpload1.PostedFile.ContentLength;
            Byte[] FileData = new Byte[FileLen];
            HttpPostedFile hp = FileUpload1.PostedFile;//建立訪問用戶端上傳檔案的對象
            Stream sr = hp.InputStream;//建立資料流對象
            sr.Read(FileData, 0, FileLen);//將圖片資料放到FileData數組對象執行個體中,其中0代表數組指標的起始位置,FileLen表示要讀取流的長度(指標的結素位置)
            SqlConnection con = new SqlConnection("server=(local);user id=sa;pwd=;database=");
            con.Open();
            SqlCommand com = new SqlCommand("INSERT INTO tb_15 (name) VALUES (@imgdata)", con);
            com.Parameters.Add("@imgdata", SqlDbType.Image);
            com.Parameters["@imgdata"].Value = FileData;
            com.ExecuteNonQuery();
            Label1.Text = "儲存成功！";
        }
        catch (Exception error)
        {

        
            Label1.Text = "處理出錯！原因為：" + error.ToString();
        }
    }
   
}