“LinkDB”的类型初始值设定项引发异常。
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Data.OleDb;
namespace AccessApplication
{
class Program
{
static void Main(string[] args)
{
LinkDB linkdb = new LinkDB();
linkdb.DisplayData();
}
}
}
class LinkDB
{
static OleDbConnection connection = new OleDbConnection("@Provider=Microsoft.Jet.OLEDB.4.0;Data Source=db1.mdb ");
OleDbCommand cmd = new OleDbCommand("select * from room", connection);
OleDbDataReader Rd;
public void DisplayData()
{
connection.Open();
Rd = cmd.ExecuteReader();
while (Rd.Read())
{
Console.WriteLine("F:{0}, S:{1} ", Rd.GetString(0), Rd.GetString(0));
}
connection.Close();
}
}
这是我修改别人的代码,没有错误,可运行时却出现了如题错误,求教。。。