OleDbDataReader cmd.ExecuteReader（）“枚舉沒有結果”

Question

我試圖從Excel文件中獲取數據並將其設置在數據庫中

我的代碼看起來像這樣的答案

            var path = GetPath(activityId);
            path = Path.Combine(path, fileName);

            var strConnection = GetConnectionString();

            var excelConnString = String.Format("Provider=Microsoft.ACE.OLEDB.12.0;Data Source={0};Extended Properties=\"Excel 12.0\"", path);

            using (OleDbConnection excelConnection = new OleDbConnection(excelConnString))
            {
                excelConnection.Open();
                DataTable dtSchema = excelConnection.GetOleDbSchemaTable(OleDbSchemaGuid.Tables, new object[] { null, null, null, "TABLE" });
                string firstSheetName = dtSchema.Rows[0]["TABLE_NAME"].ToString();

                using (OleDbCommand cmd = new OleDbCommand("Select * from [" + firstSheetName + "]" , excelConnection))
                {
                    using (OleDbDataReader dReader = cmd.ExecuteReader())
                    {
                        using (SqlBulkCopy sqlBulk = new SqlBulkCopy(strConnection))
                        {
                            sqlBulk.DestinationTableName = tableName;

                            while (dReader.Read())
                            {
                                sqlBulk.WriteToServer(dReader);
                            }
                        }
                    }
                }

但是當我調試sqlBulk.WriteToServer(dReader); 我也顯示此錯誤，數據也沒有加載到表中：

空=“枚舉沒有結果”

我嘗試了很多答案但沒有成功

注意：我上傳的Excel字段和表格看起來相同

Answer 1

我通過更改如下代碼（使用OleDbDataAdapter而不是OleDbDataReader ）解決了此問題：

   DataTable Contents = new DataTable();
   using (OleDbDataAdapter cmd = new OleDbDataAdapter("Select * from [" + firstSheetName + "]", excelConnection))
   {
     cmd.Fill(Contents);
     using (SqlBulkCopy sqlBulk = new SqlBulkCopy(strConnection))
     {
       sqlBulk.DestinationTableName = tableName;
       sqlBulk.WriteToServer(Contents);
      }
   }