使用C＃将图像插入cassandra blob [英] Insert image into cassandra blob using C#

问题描述

我正在尝试将图像插入列数据类型 blob

I am trying to insert an image into Cassandra table of column datatype blob

的Cassandra表中错误：

While inserting i get the error:

输入处没有变量替代

no variable alternative at input

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;
    }
  }

推荐答案

使用参数化查询，例如（... values（?,？）...）并添加参数。您查询的方式将是值（1， hello， Array）...（或类似值）。

Use a parameterized query, like ( ... values(?, ?)...) and add parameters. The way you have your query, it's going to have values(1, "hello", "Array").... (or similar).

从中检查文档此处： https://github.com/datastax/csharp-driver

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