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Client For Microsoft Excel in C#

, 8 Dec 2005
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MicrosoftExcelClient is a small assembly coded in C#.NET which is used to interface with, i.e., read from and write into an Excel sheet in the .NET Framework.

Sample Image - MicrosoftExcelClient.jpg


In the following article, a brief description has been provided for a client which is used to interface with Microsoft Excel documents. Interfacing to Excel documents (reading, inserting, updating etc.) is a basic task under ADO.NET, and every developer must have a sense of interfacing to Excel documents. The MicrosoftExcelCient is a simple class any developer can use in their code to interface with Excel documents. It has been created in C# and uses OLEDB.

Inside MicrosoftExcelClient

The MicrosoftExcelClient has been created in C#, and in essence is a class which provides an easy to use simple interface to access Excel workbooks in the .NET Framework. OLEDB components are used within C# to access Excel sheets like databases.

/// <summary>
/// Connects to the source excel workbook
/// </summary>

OleDbConnection m_ConnectionToExcelBook;

/// <summary>
/// Reads the data from the document to a System.Data object
/// </summary>

OleDbDataAdapter m_AdapterForExcelBook;

Shown below are code snippets from some of the basic functions used in the MicrosoftExcelClient assembly...

Open Connection To An Excel Workbook

this.m_ConnectionToExcelBook = 
    new OleDbConnection("Provider=Microsoft.Jet" + 
    ".OLEDB.4.0;Data Source=" + 
    this.m_SourceFileName + 
    ";Extended Properties=Excel 8.0;");


Read Data From An Excel Sheet

DataTable returnDataObject = new DataTable();
OleDbCommand selectCommand = 
   new OleDbCommand("select * from [" + iSheetName + "$]");

selectCommand.Connection = this.m_ConnectionToExcelBook;
this.m_AdapterForExcelBook = new OleDbDataAdapter();
this.m_AdapterForExcelBook.SelectCommand = selectCommand;

Insert Or Update Format

OleDbCommand nonQueryCommand = new OleDbCommand(iQuery);
nonQueryCommand.Connection = this.m_ConnectionToExcelBook;
nonQueryCommand.CommandText = iQuery;

How To Use The MicrosoftExcelClient

As mentioned previously, the provided client is quite simple to use for budding developers, and should be a mere cake walk for experienced pros. Shown below is a brief snippet of how simple it is to use this assembly to extract and feed data from / into an Excel sheet…

Sample screenshot

//Declare the sample object & set source data path
MicrosoftExcelClient sampleObject = 
     new MicrosoftExcelClient("SampleData.xls");

//Open connection to the excel work book

//Load the entire excel sheet into Datagrid1 
//( Sheet name is passed as a parameter )
this.dataGrid1.DataSource = sampleObject.readEntireSheet("sheet1");

//Load the result of a specific query on the excel sheet into Datagrid2 
//Query pased as a parameter

this.dataGrid2.DataSource = 
   sampleObject.readForSpecificQuery("select data1 , " + 
   "data2 ,data3 from [sheet1$]");

//Inserts a new record into the excel sheet
sampleObject.runNonQuery("insert into [sheet1$]" + 
         " values('1','2','3','4','5','6','7') ");

//Update the given excel sheet
sampleObject.runNonQuery("update [sheet1$] set data1 = '9'");


To sum it all up, the MicrosoftExcelClient is very simple to use, and is open source and not copyrighted. You may use it in parts or as a whole without any restrictions. The demo project is bug free, and any and all suggestions are welcome. You may face problems deleteing records from an Excel database when using the NonQuery function, however this is a drawback of OLEDB, and is not a mistake in the code.


This article has no explicit license attached to it but may contain usage terms in the article text or the download files themselves. If in doubt please contact the author via the discussion board below.

A list of licenses authors might use can be found here


About the Author

Siddhartha Batra
Web Developer
India India
Siddharth Batra is a first year graduate student, pursuing his Master's of Science in Computer Science at Stanford University. His research interests are in the domains of computer vision, digital image processing, visualizations and applied computer graphics.
He also posseses a keen interest in the .NET Framework and the C# language
You can contact Siddharth Batra at

Comments and Discussions

GeneralMy vote of 1 Pinmemberdebbie613-Apr-12 6:09 
GeneralMy vote of 5 Pinmembermanoj kumar choubey7-Feb-12 2:56 
QuestionAlternative solution PinmemberJamesHoward97228-Dec-11 5:57 
GeneralERROR: the first row don't display! Pinmemberwadeliu6-Oct-08 20:26 
GeneralRe: ERROR: the first row don't display! PinmemberDeathspike22-Oct-08 2:22 
QuestionExcel Probelm Pinmemberghumman638-May-08 18:42 
AnswerRe: Excel Probelm Pinmembergg423713-Nov-09 1:06 
QuestionCan I read Opened Excel file continuosly? PinmemberMember 458580414-Jan-08 7:47 
GeneralProblem with create table. PinmemberTomasz_S14-Jan-08 2:51 
QuestionExtended Functions Pinmembernew devy4-Nov-07 9:25 
AnswerRe: Extended Functions PinmemberSiddhartha Batra4-Nov-07 9:48 
QuestionRe: Extended Functions Pinmembernew devy6-Nov-07 8:23 
GeneralLong Strings Pinmemberstephen66630-Nov-06 2:41 
GeneralDates Pinmemberstephen66624-Nov-06 0:20 
GeneralRe: Dates PinmemberSiddhartha Batra24-Nov-06 0:25 
GeneralRe: Dates Pinmemberstephen66624-Nov-06 0:45 
GeneralRe: Dates Pinmemberstephen66630-Nov-06 2:38 
GeneralRe: Dates PinmemberShailendrasinh14-Nov-07 10:47 
QuestionUpdate Fails PinmemberGeorge.Will30-Oct-06 9:33 
AnswerRe: Update Fails Pinmemberricpue2-Nov-06 10:09 
GeneralI CAN NOT download source Pinmemberlbustio30-Oct-06 3:03 
GeneralRe: I CAN NOT download source PinmemberSiddhartha Batra30-Oct-06 6:34 
GeneralThank you for sharing! PinmemberDavid7776-Sep-06 1:59 
QuestionDeleting rows PinmemberCezar Gradinariu4-Apr-06 2:03 
GeneralRe: Deleting rows PinmemberSiddhartha Batra4-Apr-06 2:06 

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