C# C语言中的OldeDb对象异常#

此异常最初是在此调用堆栈中引发的：

---

使用

Microsoft.ACE.OLEDB.12.0

或

Microsoft.ACE.OLEDB.16.0

而不是

Microsoft.Jet.OLEDB.4.0

。打开CSV文件时，连接字符串包含目录路径，而不是.CSV文件名，扩展属性不指定

Excel 8.0

，而是指定

text

。查询

SELECT*FROM

，指定文件名，而不是像这样的类似Excel的工作表

[9-50070\u 000018.csv$]

+（更多问题）--看不同的例子，你能写一个正确的陈述吗？我已经按照你给定的链接进行了操作，但仍然发现连接错误。open你能用记事本打开文件吗？文件中的数据最近有变化吗？您最近是否进行过任何windows更新？我已将连接字符串更改为Jimi Guidence。现在，我遇到无效路径错误，因为我的路径是正确的。

System.Data.OleDb.OleDbConnectionInternal.OleDbConnectionInternal(System.Data.OleDb.OleDbConnectionString, System.Data.OleDb.OleDbConnection)
    System.Data.OleDb.OleDbConnectionFactory.CreateConnection(System.Data.Common.DbConnectionOptions, System.Data.Common.DbConnectionPoolKey, object, System.Data.ProviderBase.DbConnectionPool, System.Data.Common.DbConnection)
    System.Data.ProviderBase.DbConnectionFactory.CreateConnection(System.Data.Common.DbConnectionOptions, System.Data.Common.DbConnectionPoolKey, object, System.Data.ProviderBase.DbConnectionPool, System.Data.Common.DbConnection, System.Data.Common.DbConnectionOptions)
    System.Data.ProviderBase.DbConnectionFactory.CreateNonPooledConnection(System.Data.Common.DbConnection, System.Data.ProviderBase.DbConnectionPoolGroup, System.Data.Common.DbConnectionOptions)
    System.Data.ProviderBase.DbConnectionFactory.TryGetConnection(System.Data.Common.DbConnection, System.Threading.Tasks.TaskCompletionSource<System.Data.ProviderBase.DbConnectionInternal>, System.Data.Common.DbConnectionOptions, System.Data.ProviderBase.DbConnectionInternal, out System.Data.ProviderBase.DbConnectionInternal)
    System.Data.ProviderBase.DbConnectionInternal.TryOpenConnectionInternal(System.Data.Common.DbConnection, System.Data.ProviderBase.DbConnectionFactory, System.Threading.Tasks.TaskCompletionSource<System.Data.ProviderBase.DbConnectionInternal>, System.Data.Common.DbConnectionOptions)
    System.Data.ProviderBase.DbConnectionClosed.TryOpenConnection(System.Data.Common.DbConnection, System.Data.ProviderBase.DbConnectionFactory, System.Threading.Tasks.TaskCompletionSource<System.Data.ProviderBase.DbConnectionInternal>, System.Data.Common.DbConnectionOptions)
    System.Data.ProviderBase.DbConnectionInternal.OpenConnection(System.Data.Common.DbConnection, System.Data.ProviderBase.DbConnectionFactory)
    System.Data.OleDb.OleDbConnection.Open()
    WindowsFormsApp1.DB_Connect.DB_Fields() in DB_Connect.cs
    ...
    [Call Stack Truncated]

public static string[] DB_Fields()
{

String[] s = new string[21];
int i = 0, res1;
string s1 = "-";

            string con = @"Provider=Microsoft.Jet.OLEDB.4.0;Data Source=C:\Users\Mu\Desktop\9-50070_000018.csv;" + @"Extended Properties='Excel 8.0;HDR=No;'";
            using (OleDbConnection connection = new OleDbConnection(con))
            {
                connection.Open();
                OleDbCommand command = new OleDbCommand("select * from [9-50070_000018.csv$]", connection);
                using (OleDbDataReader dr = command.ExecuteReader())
                {
                    while (dr.Read())
                    {
                        var data = dr[0];
                        //Console.WriteLine(data);
                        res1 = Strings.InStr(data.ToString(), s1, CompareMethod.Text);
                        //MessageBox.Show(res1.ToString());
                        //MessageBox.Show(data.ToString());
                        if (res1 == 0)
                        {
                            s[i] = data.ToString();
                            i++;
                        }
                        else
                        {
                            break;
                        }
                    }
                }
            }
            return s;
        }