How to read excel File from ASHX page?

Question

Hi i have uploaded file to one amazon s3 server,how can i read excel file and want to send excel data to database. my code is

<script type="text/javascript">
         var obj = null;
         $(function () {
             $('#fileupload').fileupload({
                 replaceFileInput: false,
                 formData: function (form) {
                     return [{ name: "name1", value: "value1" }, { name: "name2", value: "value2"}];
             $('#btnGo').click(function () {
                 obj.submit();
             });
         });
     </script>

And my ashx page, where i need to read excel data

public class AjaxFileHandler : IHttpHandler
    {
        public void ProcessRequest(HttpContext context)
        {
            var file = context.Request.Files[0];
            string fileName=fileName = Guid.NewGuid().ToString() + file.FileName;
            Stream streamContentFile = context.Request.Files[0].InputStream;

            var iFileSize = context.Request.Files[0].ContentLength;
            byte[] data = new byte[iFileSize];
            int bytes_read = 0;
            while (bytes_read < iFileSize)
            {
                int bytes_read_this_iteration = streamContentFile.Read(data, bytes_read, iFileSize - bytes_read);
            streamContentFile.Close();
            streamContentFile.Dispose();
            CommonBLL.UploadTemporaryFilesToS3Bucket(fileName, data);
//Here i need to read excel code can you provide how to do that pleas
    }

Answer 1

you need two things:

• a Driver that allows code to read Excel content
• access to this file
• a query over excel data

In this sample:

• I use ACE (Microsoft Access Database Engine) driver, that must be installed on the server
• the file is in App_Data folder (in your case the file should be rached CommonBLL library, i suppose)

• the query is an UPDATE query; you can replace with a SELECT or INSERT query, using common DB SNippets.

   string fileName= Server.MapPath( "~/App_Data/MyFile.xls"); string sheetName= "Sheet1"; string connString = string.Format( "Provider=Microsoft.ACE.OLEDB.12.0;Data Source={0};Extended Properties='Excel 8.0;HDR=No'" , fileName); string command = string.Format("UPDATE [{0}${1}:{1}] SET F1='{2}'", sheetName,cellName, cellValue); using (OleDbConnection oledbConn = new OleDbConnection(connString)) { oledbConn.Open(); using (OleDbCommand cmd = new OleDbCommand(command, oledbConn)) cmd.ExecuteNonQuery(); oledbConn.Close(); } 

Answer 2

I would use open source libraries for excel, EPPlus (xslx) or NPOI (xls). They are very easy to use, and I am using EPPlus for numerous excel imports / exports and it's working great. These libraries have no external dependancies, and you can use it on server side.