regarding the asp.net

protected void btnSub_Click(object sender, EventArgs e)
{
    UploadVideo obj = new UploadVideo();
    string filename = fuUploadVideo.FileName;
    string path = Server.MapPath("Uploads4");
    string strFinalFileName = Path.GetFileName(fuUploadVideo.FileName);
    long  FileLength = fuUploadVideo.PostedFile.ContentLength;
    long uploadchunklimit;
    int SizeLimit = (int)FileLength;
        if (FileLength <= 1024)
        {
            uploadchunklimit = 1;
            SizeLimit = (int)FileLength;
        }
        else if (FileLength > 1024)
        {
            uploadchunklimit = FileLength / 1024;
            SizeLimit = 10;
        }
        else if (FileLength <= 10240 && FileLength > 1024)
        {
            uploadchunklimit = FileLength / 1024;
        }
        else
        {
            uploadchunklimit = FileLength / 1024;
        }

        long lngSize = (long)SizeLimit;
        lngSize = 1024 * 1024;
        string ext = Path.GetExtension(fuUploadVideo.PostedFile.FileName);

        path = "~\\Uploads4\\" + filename;
        SqlConnection con = new SqlConnection(str);
        lblinfo.Text = " uploaded successfully ";
        cmd = new SqlCommand("Insert into tablename(Video_Name,url) values(@Video,'" + path + "')", con);
        cmd.Parameters.AddWithValue("Video", TextBox2.Text);
        cmd.CommandType = CommandType.Text;
        con.Open();
        cmd.ExecuteNonQuery();
        con.Close();
    }