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Posted 14 Dec 2012

Read Excel File into DataSet in ASP.NET Using C#

, 30 Jul 2013
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How to read Excel file data into a DataSet in ASP.NET using C#.


In this example, I will explain how to read Excel file data into a DataSet in ASP.NET using C#. I have created an Excel file which contains the Slno, FirstName, LastName, and Location which is shown below:

We would be putting all the data into the grid view and with the help of filter with the dropdown list box, we would filter the Slno and display accordingly, else display all the cell values in the grid.


<asp:DropDownList ID="ddlSlno" runat="server" 


        AutoPostBack="true" AppendDataBoundItems="True">
<asp:ListItem Selected="True" 

Value="Select">- Select -</asp:ListItem>
<asp:GridView ID="grvData" runat="server">
<asp:Label ID="lblError" runat="server" />

C# Code

using System;
using System.Data.OleDb;
using System.Data;
using System.IO;
OleDbConnection oledbConn;
protected void Page_Load(object sender, EventArgs e)
    if (!IsPostBack)
protected void ddlSlno_SelectedIndexChanged(object sender, EventArgs e)
private void GenerateExcelData(string SlnoAbbreviation)
            // need to pass relative path after deploying on server
            string path = System.IO.Path.GetFullPath(Server.MapPath("~/InformationNew.xlsx"));
            /* connection string  to work with excel file. HDR=Yes - indicates 
               that the first row contains columnnames, not data. HDR=No - indicates 
               the opposite. "IMEX=1;" tells the driver to always read "intermixed" 
               (numbers, dates, strings etc) data columns as text. 
            Note that this option might affect excel sheet write access negative. */

            if (Path.GetExtension(path) == ".xls")
                oledbConn = new OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0;
                Data Source=" + path + ";
                Extended Properties=\"Excel 8.0;HDR=Yes;IMEX=2\"");
            else if (Path.GetExtension(path) == ".xlsx")
                oledbConn = new OleDbConnection(@"Provider=Microsoft.ACE.OLEDB.12.0;
                Data Source=" + path + ";
                Extended Properties='Excel 12.0;HDR=YES;IMEX=1;';");
            OleDbCommand cmd = new OleDbCommand(); ;
            OleDbDataAdapter oleda = new OleDbDataAdapter();
            DataSet ds = new DataSet();

            // passing list to drop-down list

            // selecting distinct list of Slno 
            cmd.Connection = oledbConn;
            cmd.CommandType = CommandType.Text;
            cmd.CommandText = "SELECT distinct([Slno]) FROM [Sheet1$]";
            oleda = new OleDbDataAdapter(cmd);
            oleda.Fill(ds, "dsSlno");
            ddlSlno.DataSource = ds.Tables["dsSlno"].DefaultView;
            if (!IsPostBack)
                ddlSlno.DataTextField = "Slno";
                ddlSlno.DataValueField = "Slno";
            // by default we will show form data for all states 
            // but if any state is selected then show data accordingly
            if (!String.IsNullOrEmpty(SlnoAbbreviation) && SlnoAbbreviation != "Select")
                cmd.CommandText = "SELECT [Slno], [FirstName], [LastName], [Location]" +
                    "  FROM [Sheet1$] where [Slno]= @Slno_Abbreviation";
                cmd.Parameters.AddWithValue("@Slno_Abbreviation", SlnoAbbreviation);
                cmd.CommandText = "SELECT [Slno],
                [FirstName],[LastName],[Location] FROM [Sheet1$]";
            oleda = new OleDbDataAdapter(cmd);

            // binding form data with grid view
            grvData.DataSource = ds.Tables[1].DefaultView;
        // need to catch possible exceptions
        catch (Exception ex)
            lblError.Text = ex.ToString();
}// close of method GemerateExceLData


When you select the value from the dropdown list, the result would be: 


This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)


About the Author

Mannava Siva Aditya
Web Developer
India India
I am a 29 year old software Web Developer from Hyderabad, India. I have been working since approximately age 25. Where as in IT Development industry since 27. I am Microsoft Certified Technology Specialist.

I have taught myself in development, beginning with Microsoft's technologies ASP.NET, Approximately 3 years ago, I was given an opportunity to work as a freelance in the tech field. Now I am working as a web developer where my roles make me purely in web based technology solutions which manage and control access to applications and patient information stored in legacy systems, client-server applications.

I too had an opportunity to train some IT professionals with technical skills in development area. Which became my passion.

I have worked on various .NET framework versions(2.0 , 3.5, 4.0) and have been learning every new technology being introduced. Currently, I am looking forward to working in R & D in .Net to create distributed, reusable applications.

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Comments and Discussions

GeneralMy vote of 5 Pin
Carsten V2.014-Dec-12 21:40
memberCarsten V2.014-Dec-12 21:40 
GeneralRe: My vote of 5 Pin
Mannava Siva Aditya16-Dec-12 18:27
memberMannava Siva Aditya16-Dec-12 18:27 
GeneralRe: My vote of 5 Pin
Carsten V2.016-Dec-12 21:05
memberCarsten V2.016-Dec-12 21:05 

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