How to read an Excel file using c# neither using Interop nor OpenXML

Question

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Hi,

I want to Read an excel file using C# but

1. I dont want to use Interop since microsoft itself advises not to use that bcoz of various problems
2. I dont want to use OpenXML also since my file will be password protected, which will not be supported by OpenXML

Please suggest any other Idea other than this.

Posted 4-Sep-13 0:21am

Mathi2code

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2 solutions

Solution 1

Hi Mathi, try this;

C#

IExcelDataReader iExcelDataReader = null;
 
            FileStream oStream = File.Open(filepath, FileMode.Open, FileAccess.Read);
 
            iExcelDataReader = ExcelReaderFactory.CreateOpenXmlReader(oStream);
 
            iExcelDataReader.IsFirstRowAsColumnNames = true;
 
            DataSet dsUnUpdated = new DataSet();
 
            dsUnUpdated = iExcelDataReader.AsDataSet();
 
            iExcelDataReader.Close();
 
            if (dsUnUpdated == null)
            {
                oStream = File.Open(filepath, FileMode.Open, FileAccess.Read);
                iExcelDataReader = ExcelReaderFactory.CreateBinaryReader(oStream);
 
                iExcelDataReader.IsFirstRowAsColumnNames = true;
 
                dsUnUpdated = iExcelDataReader.AsDataSet();
 
                iExcelDataReader.Close();
            }

you need to add Namespace for this;

C#

using System.Runtime.Serialization.Formatters.Binary;

I hope this will help you.

Thank's

Mohan G

Posted 4-Sep-13 0:33am

Mohan Gopi

v2

Comments

Mathi2code 4-Sep-13 9:28am

I'm not getting this IExcelDataReader.
Could you please help me to refer this interface.
What namespace do I need to get this interface.

Also will this support .xlsb and .xlsm type files.
Kindly help.

Mohan Gopi 4-Sep-13 9:39am

you need to add namespace

Using Excel;

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Nissim Salomon · Accepted Answer · 2013-09-04T00:41:00

Solution 2

Hi I'm using NPOI project in order to process excel files

Posted 4-Sep-13 0:41am

Nissim Salomon

Comments

Mathi2code 4-Sep-13 9:25am

Hi, Thanks for reply.
Will NPOI supports password protected file and .xlsb file ?

Nissim Salomon 4-Sep-13 9:46am

I didn't try it but i think it does basically its a tool that exist in the market for quiet a lot. the first version was for a java framework and imported into .net

Mathi2code 10-Oct-13 22:47pm

Hi, You can use krypto tool to decrypt the password protected file but .xlsb is not supported by NPOI I could read .xlsm file. Thanks