使用OleDbDataAdapter在DataTable中填充數據不正確

Question

當我嘗試導入Excel工作表時，它不會提取某些整數值。我正在使用DevExpress GridControl從Grid導出數據。導出後我改變一些單元格（有空白值）的值爲整數比方說123然後在導入它不會取得DataTable中的整數值。

我在DevExpress支持中心「Export values in Improper Cell」上發佈了相同的問題。他們說這個問題來自MSDN而不是他們的控制。請從給定的DevExpress鏈接下載示例鏈接&也可以觀看附加的視頻以獲取更多詳細信息。

我已經使用下面的代碼導入。

private System.Data.DataTable GetDataTableFromFile(string fileName) 
    { 
     string query = string.Empty; 
     //// string connectionString = "provider=Microsoft.Jet.OLEDB.4.0;Data Source='" + fileName + "';Extended Properties=Excel 8.0;"; 
     string connectionStringV12 = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source={0};Extended Properties=Excel 12.0;"; 
     string connectionStringV4 = "Provider=Microsoft.Jet.OLEDB.4.0;Data source={0};Extended Properties=Excel 8.0;"; 
     System.Data.DataTable dataTable = new System.Data.DataTable(); 
     OleDbConnection obedbConnection = new OleDbConnection(string.Format(connectionStringV4, fileName)); 
     try 
     { 
      if (obedbConnection.State != ConnectionState.Open) 
      { 
       obedbConnection.Open(); 
      } 
     } 
     catch (Exception) 
     { 
      ////Diff. Connetion String 
      obedbConnection = new OleDbConnection(string.Format(connectionStringV12, fileName)); 
     } 

     ////Get First SheetName From Xls File 
     string sheetName = GetSheetNameFromFile(obedbConnection); 

     if (sheetName != null) 
     { 
      ////Query for Reading all Data from File 
      query = "select * from [" + sheetName + "]"; 
     } 

     if (!string.IsNullOrEmpty(query)) 
     { 
      OleDbDataAdapter data = new OleDbDataAdapter(query, obedbConnection); 
      data.Fill(dataTable); 
     } 
     return dataTable; 
    } 

    /// <summary> 
    /// Gets First SheetName of excel File 
    /// </summary> 
    /// <param name="con">Connection object.</param> 
    /// <returns>return sheet name.</returns> 
    private string GetSheetNameFromFile(OleDbConnection con) 
    { 
     try 
     { 
      if (con.State != ConnectionState.Open) 
      { 
       con.Open(); 
      } 
      var oledbTableSchema = con.GetOleDbSchemaTable(OleDbSchemaGuid.Tables, new object[] { null, null, null, "Table" }); 
      if (oledbTableSchema.Rows.Count > 0) 
      { 
       string sheetName = oledbTableSchema.Rows[0].ItemArray[2].ToString(); 
       if (string.IsNullOrEmpty(sheetName)) 
       { 
        throw new Exception("Sheet Not Found"); 

       } 
       return sheetName; 
      } 
      return string.Empty; 
     } 
     catch (Exception ex) 
     { 
      throw new Exception(ex.Message); 
     } 
    } 
} 

那麼，任何人都可以幫我解決這個問題嗎？

Answer 1

將IMEX = 1屬性添加到我的連接字符串中，解決了我的問題。

string connectionStringV4 = "Provider=Microsoft.Jet.OLEDB.4.0;Data source={0};Extended Properties=Excel 8.0;IMEX=1;"; 

也有報道在下線程

Not able to read integer in excel file consistantly

有關詳細答案，請進入以下鏈接類似的行爲：

Data not fills correctly in DataTable using OleDbDataAdapter