使用c#将图像插入cassandra blob

我正在尝试将图像插入到列数据类型blob的Cassandra表

插入i得到错误:

输入时无变量可选

ISession CluSession = cluster.Connect("dbs");
MemoryStream ms = new MemoryStream();
OpenFileDialog f = new OpenFileDialog();
f.InitialDirectory = @"H:'MobilePics_sufian'";
f.Filter = "All Files |*.*|JPEGs|*.jpg|Bitmaps|*.bmp|GIFs|*.gif";
            f.Multiselect = true;
DialogResult dr = f.ShowDialog();
int i = 0;
 if (dr == System.Windows.Forms.DialogResult.OK)
 {
   foreach(string file in f.FileNames)
   {
    i = 1;
    lstimage.Items.Add(file.ToString());
    FileStream fs = new FileStream(file.ToString(), FileMode.OpenOrCreate,  FileAccess.Read);
    byte[] MyData = new byte[fs.Length];
    fs.Read(MyData, 0, System.Convert.ToInt32(fs.Length));
    CluSession.Execute("insert into Product1(id,name,p_image) values (" + i + "," + "hello" + "," + MyData.ToArray() + ")");
    i = i + 1;
    }
  }