C# 无法使用 opendatasource 和 Microsoft.ACE.OLEDB.16.0 从存储过程中获取数据

Question

我在从 Eexcel 文件中读取数据时遇到一个奇怪的问题。我在 SQL 服务器中使用 OPENDATASOURCE:

进行了查询

    SELECT COMPETENZA, [CODICE CLEINTE], [RAGIONE SOCIALE], MODELLO, VARIANTE, 
  TIPOLOGIA, ESSENZA, FINITURA, TAPPEZZERIA, COMMESSA, ROUND([% MOL SU RICAVI NETTI] * 100,2) as MARGINE
  FROM OPENDATASOURCE('Microsoft.ACE.OLEDB.16.0', 
   'Data Source=K:\UTENTI\SAMUELE\temp id commesse\ID Commesse produzione.xls;Extended Properties=EXCEL 12.0')...['Consuntivi produzione$']
  WHERE MODELLO IS NOT NULL AND [% MOL SU RICAVI NETTI] IS NOT NULL

如果我在存储过程中执行这个查询，它工作正常。

但是当我通过 HttpGet 从 C# 执行时，我遇到了这个问题：

System.Data.SqlClient.SqlException (0x80131904): Cannot initialize the data source object of OLE DB provider "Microsoft.ACE.OLEDB.16.0" for linked server "(null)".

这是我的 C# 代码：

[HttpGet]
    public async Task<JsonResult> GetMarginiCommessaListJSON()
    {
        var yourdata = GetMarginiCommessaList();

        return Json(new { data = yourdata });
    }

    public List<MarginiCommessa> GetMarginiCommessaList()
    {
        SqlDataReader reader;
        SqlConnection sqlConn = new SqlConnection(_configuration["dbConnectionString"]);
        string sqlCmdStr = "MARGINI_COMMESSE";
        SqlCommand sqlCmd = new SqlCommand(sqlCmdStr, sqlConn);
        sqlCmd.CommandType = CommandType.StoredProcedure;
        List<MarginiCommessa> allestList = new List<MarginiCommessa>();

        try
        {
            using (sqlConn)
            {
                sqlConn.Open();
                reader = sqlCmd.ExecuteReader();
                while (reader.Read())
                {
                    allestList.Add(new MarginiCommessa
                    {
                        anno = reader.GetValue(0).ToString(),
                        codCli = reader.GetValue(1).ToString(),
                        nomCli = reader.GetValue(2).ToString(),
                        modello = reader.GetValue(3).ToString(),
                        variante = reader.GetValue(4).ToString(),
                        tipologia = reader.GetValue(5).ToString(),
                        essenza = reader.GetValue(6).ToString(),
                        finitura = reader.GetValue(7).ToString(),
                        tapezzeria = reader.GetValue(8).ToString(),
                        commessa_qta = reader.GetValue(9).ToString(),
                        margine = reader.GetValue(10).ToString()
                    });
                }
                reader.Close();
                sqlConn.Close();
            }

        }
        catch (Exception e)
        {
            System.IO.File.WriteAllText(GlobalVariables.errorFolderLocation + "GetMarginiCommessaListJSON.txt", e.ToString());
        }

        return allestList;
    }

这是我的存储过程：

ALTER PROCEDURE [dbo].[MARGINI_COMMESSE]
AS
BEGIN
    SET NOCOUNT ON;

  SELECT COMPETENZA, [CODICE CLEINTE], [RAGIONE SOCIALE], MODELLO, VARIANTE, 
  TIPOLOGIA, ESSENZA, FINITURA, TAPPEZZERIA, COMMESSA, ROUND([% MOL SU RICAVI NETTI] * 100,2) as MARGINE
  FROM OPENDATASOURCE('Microsoft.ACE.OLEDB.16.0', 
   'Data Source=K:\UTENTI\SAMUELE\temp id commesse/ID Commesse produzione.xls;Extended Properties=EXCEL 12.0')...['Consuntivi produzione$']
  WHERE MODELLO IS NOT NULL AND [% MOL SU RICAVI NETTI] IS NOT NULL
  
END

我真的不明白为什么在 SQL 服务器中它工作正常而在 C# 中却不行。我该如何解决这个问题？

Answer 1

OP #1：

I have a strange issues reading datas from an excel file. I made a query in mssql with OPENDATASOURCE: If i execute this query in a stored procedure, it works fine.

OP #2：

But when i execute from c# by an HttpGet i get this issues:

首先，这是一个苹果和橘子的比较。一方面，您使用的是 MySQL，另一方面是 SQL 服务器。在后一种情况下，您还有一个网络应用程序使用 ADO.NET 来访问存储过程。

现在我不能保证 MySQL 或 OPENDATASOURCE 在这两种情况下所做的任何事情，但有一件事是肯定的 - 您似乎在服务器设置中使用 ACE OLEDB“Jet”可能是你的问题的原因。除了崩溃，使用 ACE 可能会遇到许可问题。见下文。

微软（我的重点）：

Although such programmatic development can be implemented on a client system with relative ease, a number of complications can occur if Automation takes place from server-side code such as Microsoft Active Server Pages (ASP), ASP.NET, DCOM, or a Windows NT service.

NOTE: In this context, the Access Database Engine Redistributable and Access Runtime are considered Microsoft Office components.

...和：

Developers who try to use Office in a server-side solution need to be aware of five major areas in which Office behaves differently than anticipated because of the environment.

...最重要的是（我强调）：

Besides the technical problems, you must also consider licensing issues. Current licensing guidelines prevent Office applications from being used on a server to service client requests, unless those clients themselves have licensed copies of Office. Using server-side Automation to provide Office functionality to unlicensed workstations is not covered by the End User License Agreement (EULA).

结论

因此，即使您解决了技术问题，也要注意最后一点。

另见

Considerations for server-side Automation of Office、微软

C# 无法使用 opendatasource 和 Microsoft.ACE.OLEDB.16.0 从存储过程中获取数据

C# can't get datas from stored procedure with opendatasource and Microsoft.ACE.OLEDB.16.0

c#

sql-server

stored-procedures

http-get

oledbconnection

结论

另见