OleDbDataReader從Excel電子表格中讀取空白行

不確定發生了什麼，因爲我之前使用OleDbDataReader從Excel電子表格中提取數據，但突然間我的C＃批處理作業並未通過循環在空行停止。OleDbDataReader從Excel電子表格中讀取空白行

這是我正在使用的C＃代碼。我只是試圖將所有記錄從Excel電子表格中取出並循環訪問數據。不過，出於某種原因，無論如何，_reader.Read()函數都會返回true。

private static OleDbDataReader _reader; 
    static void Main(string[] args) 
    { 
     string connString = @"Provider=Microsoft.ACE.OLEDB.12.0;Data Source= \\prdhilfs03\l&i-sales&mkt\WORKAREA\Agencyservices\Shared\AIC\Analysts_and_Reporting\Realignments\2014\MassUpdateTesting\Validate\ZipCodeTest.xlsx;Extended Properties='Excel 8.0;HDR=Yes;IMEX=1'"; 
     string queryString = "SELECT * FROM [Query1$]"; 

     Validation validation; 
     ZipCodeTerritory record; 

     bool flag = true; 
     try 
     { 
      Stopwatch watch = new Stopwatch(); 
      watch.Start(); 

      using (OleDbConnection connection = new OleDbConnection(connString)) 
      { 
       //Set connection objects to pull from spreadsheet 
       OleDbCommand command = new OleDbCommand(queryString, connection); 
       connection.Open(); 
       _reader = command.ExecuteReader(); 

       //Instantiate validation object with zip and channel values 
       _allRecords = GetRecords(); 
       validation = new Validation(); 
       validation.SetLists(_allRecords); 

       while (_reader.Read()) 
       { 
        record = new ZipCodeTerritory(); 
        record.ChannelCode = _reader[0].ToString(); 
        record.DrmTerrDesc = _reader[1].ToString(); 
        record.IndDistrnId = _reader[2].ToString(); 
        record.StateCode = _reader[3].ToString().Trim(); 
        record.ZipCode = _reader[4].ToString().Trim(); 
        record.EndDate = Convert.ToDateTime(_reader[5].ToString()); 
        record.EffectiveDate = Convert.ToDateTime(_reader[6].ToString()); 
        record.LastUpdateId = _reader[7].ToString(); 
        record.ErrorCodes = _reader[8].ToString(); 
        record.Status = _reader[9].ToString(); 
        record.LastUpdateDate = DateTime.Now; 


        if (string.IsNullOrEmpty(record.LastUpdateId)) 
        { 
         //Add to error list 
         _issues++; 
         _errorList.Add(record, "Missing last update Id"); 
         continue; 
        } 

        if (_reader[10] != DBNull.Value) 
        { 
         record.Id = Convert.ToInt32(_reader[10]); 
        } 

        _errorMsg = validation.ValidateZipCode(record); 

        if (!string.IsNullOrWhiteSpace(_errorMsg)) 
        { 
         _errorList.Add(record, _errorMsg); 
         continue; 
        } 
        else if (flag) 
        { 
         //Separate updates to appropriate list 
         SendToUpdates(record); 
        } 

        //Console.WriteLine(record.Id.ToString()); 
       }

我發現this question對堆棧溢出，並試圖通過改變queryString到下面跟隨選擇的答案。但是，當OleDbCommand運行其.ExecuteReader()方法時，這隻會引發OleDbException。（例外的Message財產寫着「沒有爲一個或多個必需的參數給出值」）

SELECT * FROM [Query1$] WHERE NOT ([ChannelCode] = '' and [DrmTerrDec] = '' and [StateCode] = '' and [ZipCode] = '' and [EndDate] = '' and [EffectiveDate] = '')

編輯

剛剛添加的while循環內所有代碼。

來源

2014-02-06 NealR

兩者可能要粘貼在_reader.Read（）使用，而塊中的代碼。 – Sorceri

剛添加到帖子。謝謝 – NealR

幫我

dataTable = dataTable.Rows.Cast<DataRow>().Where(row => !row.ItemArray.All(field => field is System.DBNull || string.Compare((field as string).Trim(), string.Empty) == 0)).CopyToDataTable();e

從https://stackoverflow.com/a/9233678

來源

2015-06-05 13:05:10 geninsin

OleDbDataReader從Excel電子表格中讀取空白行

回答

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