Question

我正在尝试将图像插入到列数据类型blob

的Cassandra表中

插入时我收到错误：

输入
时没有变量替代

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;
    }
  }

Answer 1

使用参数化查询，例如（... values（？，？）...）并添加参数。你的查询方式，它将具有值（1，＆＃34;你好＆＃34;，＆＃34;数组＆＃34;）....（或类似的）。

点击此处的文档：https://github.com/datastax/csharp-driver

使用C＃将图像插入到cassandra blob中

1 个答案: