Question

using System;
using System.Data.OleDb;
using System.Diagnostics;

namespace PullData
{

class Program
{

static void Main(string[] args)
    {

    OleDbConnection connLocal = new OleDbConnection("Provider=SAOLEDB.10;Data Source=dental;Persist Security Info=True;User ID=dba;PWD=sql;Location=1.2.3.4");

    OleDbCommand cmdLocal = new OleDbCommand("SELECT tran_num, amount, tran_date FROM transactions", connLocal);

    try
    {
        connLocal.Open();
    }catch (Exception connerr) { Debug.WriteLine(connerr.Message);}

    OleDbDataReader readLocal = cmdLocal.ExecuteReader();

    while (readLocal.Read())
    {
        Console.WriteLine(readLocal.GetString(0), readLocal.GetString(1), readLocal.GetString(2));
    }
    readLocal.Close();
    connLocal.Close();

    if (Debugger.IsAttached)
    {
        Console.ReadLine();
    }
}

上面是我试图在Visual Studio 2015中运行的代码，我尝试连接到旧的SQL Anywhere 10 DB，连接字符串直接来自VS2015的数据库资源管理器，它连接到查看表（我添加PWD除外）。这只是查看表格内容的垫脚石，因此我可以稍后将查询写入CSV或文本。

我在尝试调试/运行时收到的错误是：

An unhandled exception of type 'System.InvalidCastException' occurred in System.Data.dll

Additional information: Specified cast is not valid.

指向：

Console.WriteLine(readLocal.GetString(0), readLocal.GetString(1), readLocal.GetString(2));

似乎没有认识到读者。有人有什么建议吗？谢谢！

SQL Anywhere DB上的C＃读取表问题

0 个答案: