如何在.Net Core应用程序中使用Excel操作运行DLL

Question

我们已经在.NET类库中创建了一个DLL，我们正在其中尝试使用提供程序（Microsoft.ACE.OLEDB.12.0）上传Excel文件。我们已经在系统上安装了Access数据库引擎。从.NET Core应用程序调用DLL函数时，它将引发错误

  

Microsoft.ACE.OLEDB.12.0未在本地计算机上注册

代码：

string pass = "Notihing";
DataTable dtExcelData=null;

try
{
    string FilePath;
    string DBConStr = "data source=.;database=DBTest;Integrated Security=SSPI;persist security info=True;";
    FilePath = @"C:\Test.xlsx";

    dtExcelData = new DataTable();

    pass = "Load";
    string conString = string.Format("Provider=Microsoft.ACE.OLEDB.12.0;Data Source={0};Extended Properties=Excel 8.0", FilePath);

    using (OleDbConnection excel_con = new OleDbConnection(conString))
    {
        pass = "inside OleDbConnection using";
        excel_con.Open();
        pass = "excel_con.Open";

        DataTable schemaTable = excel_con.GetOleDbSchemaTable(OleDbSchemaGuid.Tables, new object[] { null, null, null, "TABLE" });
        DataTable schemaColTable = excel_con.GetOleDbSchemaTable(OleDbSchemaGuid.Columns, new object[] { null, null, null, null });
        string firstWorkSheet = schemaTable.Rows[0]["TABLE_NAME"].ToString();

        string OleDbSQL = string.Format(("SELECT * " + ("FROM [{0}] " + ("WHERE LEN(TRIM([{1}])) BETWEEN 5 AND 10 " + "ORDER BY [{1}]"))), firstWorkSheet, "ANumber");

        OleDbCommand OleDbCmd = new OleDbCommand(OleDbSQL, excel_con);
        string sheet1 = excel_con.GetOleDbSchemaTable(OleDbSchemaGuid.Tables, null).Rows[0]["TABLE_NAME"].ToString();

        DataColumn myDataColumn = new DataColumn();
        myDataColumn.AllowDBNull = false;
        myDataColumn.AutoIncrement = true;
        myDataColumn.AutoIncrementSeed = 1;
        myDataColumn.AutoIncrementStep = 1;
        myDataColumn.ColumnName = "autoID";
        myDataColumn.DataType = System.Type.GetType("System.Int32");
        myDataColumn.Unique = true;

        dtExcelData.Columns.Add(myDataColumn);
        Console.WriteLine("Reading Excel File.....");

        pass = "Before oda.Fill(dtExcelData);";
        using (OleDbDataAdapter oda = new OleDbDataAdapter(OleDbSQL, excel_con))
        {
            oda.Fill(dtExcelData);
        }

        pass = "After oda.Fill(dtExcelData);";

        var SelectedValues = dtExcelData.AsEnumerable().Select(s => s.Field<double>("Article Number")).Distinct().ToArray();
        string commaSeperatedValues = string.Join(",", SelectedValues);

        var PoNumbers = dtExcelData.AsEnumerable().Select(s => s.Field<Double>("Article Number")).Distinct().ToArray();
        string commaSeperated_PoNumbers = string.Join(",", PoNumbers);

        localhost.Service1 sv = new localhost.Service1();
        string rtr = sv.UploadFiles_SOCN(dtExcelData, "CreateSOCN");

        return rtr;
    }
}
catch (Exception ex) 
{ 
    return  "Error occurred: " + ex.Message + " PASS=" + pass; 
}