c# - 为什么我会收到此异常 : "he ' Microsoft. ACE.OLEDB.12。 0' provider is not registered on the local machine"？

Question

我有这个简单的 C# 控制台应用程序:

using System;
using System.Collections.Generic;
using System.Data;
using System.Data.OleDb;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ImporterRidistribuzioni
{
    class Program
    {
        static void Main(string[] args)
        {
            Console.WriteLine("ImporterRidistribuzioni START");

            string path = "C:\\WS\\RegoleInoltro\\TunnelPro-DistribuzioneTitolario.xlsx";

            ReadREgoleInoltroFrmExcelFile(path);

            Console.WriteLine("ImporterRidistribuzioni END");
        }


        public static void ReadREgoleInoltroFrmExcelFile(string filePath)
        {
            DataTable regoleInoltro;
            string oleDBConnectionString = GetOleDBConnectionString(filePath);

            using (OleDbConnection conn = new OleDbConnection(oleDBConnectionString))
            {
                conn.Open();
                OleDbCommand cmd = new OleDbCommand();
                cmd.Connection = conn;

                // Get all Sheets in Excel File
                DataTable dtSheet = conn.GetOleDbSchemaTable(OleDbSchemaGuid.Tables, null);

                /// Prendo il nome del primo foglio
                DataRow dr = dtSheet.Rows[0];
                string sheetName = dr["TABLE_NAME"].ToString();

                //regoleInoltro = GetDataTablePerimetro(cmd, sheetName);
                cmd = null;
                conn.Close();
            }
            //return regoleInoltro;
        }
    }
}

我的问题是，当它尝试执行这一行时:

conn.Open();

我收到此异常:“'Microsoft.ACE.OLEDB.12.0' 提供程序未在本地计算机上注册。

这里是详细信息:

-       $exception  {"The 'Microsoft.ACE.OLEDB.12.0' provider is not registered on the local machine."} System.InvalidOperationException
+       Data    {System.Collections.ListDictionaryInternal} System.Collections.IDictionary {System.Collections.ListDictionaryInternal}
        HResult -2146233079 int
        HelpLink    null    string
+       InnerException  null    System.Exception
        Message "The 'Microsoft.ACE.OLEDB.12.0' provider is not registered on the local machine."   string
        Source  "System.Data"   string
        StackTrace  "   at System.Data.OleDb.OleDbServicesWrapper.GetDataSource(OleDbConnectionString constr, DataSourceWrapper& datasrcWrapper)\r\n   at System.Data.OleDb.OleDbConnectionInternal..ctor(OleDbConnectionString constr, OleDbConnection connection)\r\n   at System.Data.OleDb.OleDbConnectionFactory.CreateConnection(DbConnectionOptions options, DbConnectionPoolKey poolKey, Object poolGroupProviderInfo, DbConnectionPool pool, DbConnection owningObject)\r\n   at System.Data.ProviderBase.DbConnectionFactory.CreateConnection(DbConnectionOptions options, DbConnectionPoolKey poolKey, Object poolGroupProviderInfo, DbConnectionPool pool, DbConnection owningConnection, DbConnectionOptions userOptions)\r\n   at System.Data.ProviderBase.DbConnectionFactory.CreateNonPooledConnection(DbConnection owningConnection, DbConnectionPoolGroup poolGroup, DbConnectionOptions userOptions)\r\n   at System.Data.ProviderBase.DbConnectionFactory.TryGetConnection(DbConnection owningConnection, TaskCompletionSource`1 retry, DbConnectionOptions userOptions, DbConnectionInternal oldConnection, DbConnectionInternal& connection)\r\n   at System.Data.ProviderBase.DbConnectionInternal.TryOpenConnectionInternal(DbConnection outerConnection, DbConnectionFactory connectionFactory, TaskCompletionSource`1 retry, DbConnectionOptions userOptions)\r\n   at System.Data.ProviderBase.DbConnectionClosed.TryOpenConnection(DbConnection outerConnection, DbConnectionFactory connectionFactory, TaskCompletionSource`1 retry, DbConnectionOptions userOptions)\r\n   at System.Data.ProviderBase.DbConnectionInternal.OpenConnection(DbConnection outerConnection, DbConnectionFactory connectionFactory)\r\n   at System.Data.OleDb.OleDbConnection.Open()\r\n   at ImporterRidistribuzioni.Program.ReadREgoleInoltroFrmExcelFile(String filePath) in C:\\WS\\ArxeiaProtocollo2016\\ImporterRidistribuzioni\\Program.cs:line 32\r\n   at ImporterRidistribuzioni.Program.Main(String[] args) in C:\\WS\\ArxeiaProtocollo2016\\ImporterRidistribuzioni\\Program.cs:line 19" string
+       TargetSite  {Void GetDataSource(System.Data.OleDb.OleDbConnectionString, System.Data.OleDb.DataSourceWrapper ByRef)}    System.Reflection.MethodBase {System.Reflection.RuntimeMethodInfo}

我正在 Azure 云中开发 Windows Server 2012。

我安装了这个工具的 64 位版本:https://www.microsoft.com/en-us/download/details.aspx?id=13255

此处建议:The 'Microsoft.ACE.OLEDB.12.0' provider is not registered on the local machine.

但什么都没有改变。我仍然遇到同样的错误。

为什么？我错过了什么？我该如何尝试解决这个问题？

Answer 1

看来您已经安装了 64 位版本的 MS Access，正如您应该的那样，因为 Windows Server 2012 机器几乎肯定是 64 位的。但是，您的 Console App.is 构建为 32 位。 尝试构建针对 32 位和 64 位操作系统的应用程序