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C# Response.ContentType Creating multiple tabs in Excel

I'm generating an Excel report in C# and need to add a second tab to the Excel file that will contain reference data. How do I achieve this without using ClosedXML ?
Response.AddHeader("content-disposition", "attachment; filename=" + fname);
Response.ContentType = "application/vnd.ms-excel";
var writer = new System.IO.StringWriter();
var htmlTextWriter = new HtmlTextWriter(writer);
dataGrid.RenderControl(htmlTextWriter);
Response.Write(writer.ToString());
Response.End();

could not generate excel file on button click in c#

In my project when i click on a button it should generate excel file and in the middle of first line in excel file as a heading i should get as "my first excel file". I could not get it when i am trying with following code.Any ideas?. Thanks in advance
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.IO;
namespace listofdirectories
{
public partial class ExportToExcel : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
}
protected void Button1_Click(object sender, EventArgs e)
{
HttpResponse response = HttpContext.Current.Response;
response.ContentType = "application/ms-excel";
response.AddHeader("Content-Disposition", "attachment;filename=practise.xls");
StreamWriter stw = new StreamWriter();
HtmlTextWriter htw = new HtmlTextWriter(stw);
stw.WriteLine("my first excel file");
response.End();
}
}
}

You forgot to add the content to the response like this-
response.Write(stw.ToString());
response.End();
Also change your content type to this -
response.ContentType = "application/vnd.ms-excel";
Instead of using StreamWriter use StringWriter and change your code like this-
Response.Clear();
Response.ClearContent();
Response.ClearHeaders();
Response.Charset = "";
string FileName = "filename.xls";
StringWriter strwritter = new StringWriter();
HtmlTextWriter htmltextwrtter = new HtmlTextWriter(strwritter);
Response.Cache.SetCacheability(HttpCacheability.NoCache);
Response.ContentType ="application/vnd.ms-excel";
Response.AddHeader("Content-Disposition","attachment;filename=" + FileName);
Response.Write(strwritter.ToString());
Response.End();
To load the content in to the excel file, if recommend that you load the dataset with the data, then bind a grid view with that dataset and render the gridview as html after that fill the response with that rendered html like this-
GridView gv = new GridView();
gv.DataSource = dataset; //Your datasource from database
gv.DataBind();
Response.ClearContent();
Response.Buffer = true;
Response.AddHeader("content-disposition", "attachment; filename=filename.xls");
Response.ContentType = "application/vnd.ms-excel";
Response.Charset = "";
StringWriter sw = new StringWriter();
HtmlTextWriter htw = new HtmlTextWriter(sw);
gv.RenderControl(htw);
Response.Write(sw.ToString());
Response.Flush();
Response.End();

How do I save a word document to my file system instead of printing it out?

In my application I print my div to a word document like this:
Response.Clear();
Response.AddHeader("content-disposition", "attachment;filename=testme.doc");
Response.Charset = "";
Response.Cache.SetCacheability(HttpCacheability.NoCache);
Response.ContentType = "application/doc";
System.IO.StringWriter stringWrite = new System.IO.StringWriter();
System.Web.UI.HtmlTextWriter htmlWrite = new HtmlTextWriter(stringWrite);
divExport.RenderControl(htmlWrite);
Response.Write(stringWrite.ToString());
Response.End();
Instead of opening it on the browser How would I go about saving it to a path? Generally when using ItextSharp I would declare the path and the existing template file.
private static string AppRelativePath_1page = "~/DesktopModules/MyFolder";
private static string AppAbsolutePath_1page = HttpContext.Current.Server.MapPath(AppRelativePath_1page);
In this case there is no existing template file. How would I go about creating this file in my server folder?

Open a StreamWriter, and instead of writing to the Response object, write to your StreamWriter.

you do it by using Streamwriter
using (StreamWriter sw = new StreamWriter(Path))
{
sw.Write(stringWrite.ToString());
}

Creating multiple sheets of excel from c# using streamwriter

I'm using the streamwriter to create an excel file. but the problem is that I didn't find a way to create multiple sheets and specify their names from c#. Also I wanted to draw a chart on excel using streamwriter. So does anybody have an idea how to do both things using streamwriter and not excel instance??
My code is like this:
String sPath = Environment.GetEnvironmentVariable("TEMP") + "\\Synthese.xls";
FileStream oFile = new FileStream(sPath, FileMode.Create);
StreamWriter oWriter = new StreamWriter(oFile, System.Text.Encoding.UTF8);
oWriter.WriteLine("<table border='1' border-color='#ffffff' style=font-weight:bold;><tr>");
...
oWriter.Close();
oFile.Close();
FileInfo myFile = new FileInfo(sPath);
Response.Clear();
Response.AddHeader("Content-Disposition", "attachment; filename=" + myFile.Name);
Response.AddHeader("Content-Length", myFile.Length.ToString());
Response.ContentType = "application/octet-stream";
Response.WriteFile(myFile.FullName);
Response.Flush();
Response.End();
Any help is highly appreciated.

It looks like you're trying to write pseudo-HTML to a xls file and hope it works... I'd be surprised if Excel even opens it.
You are better off using a proper tool for the job.
I suggest looking at EPPlus which allows you to create excel documents in C# with all the features you are describing.
Example lifted from the codeplex site:
FileInfo newFile = new FileInfo(outputDir.FullName + #"\sample6.xlsx");
ExcelPackage pck = new ExcelPackage(newFile);
//Add the Content sheet
var ws = pck.Workbook.Worksheets.Add("Content");
ws.View.ShowGridLines = false;
//Headers
ws.Cells["B1"].Value = "Name";
ws.Cells["C1"].Value = "Size";
ws.Cells["D1"].Value = "Created";
ws.Cells["E1"].Value = "Last modified";
ws.Cells["B1:E1"].Style.Font.Bold = true;
Additionally it is advisable to use using statements when using IDisposable classes such as FileStream:
using (var stream = new FileStream(path, FileMode.Create))
{
// ... stuff using stream in here
}

DataGrid to excel not showing automatic gridlines

Wondering if anyone can assist. I have an .ashx file which creates an excel document which is populated with a C# DataGrid. This all works well the only problem is when I open the excel document the automatic gridlines are turned off. Is there a way to enable them?
Thanks in advance,
Air
HttpResponse response = HttpContext.Current.Response;
response.Clear();
response.Charset = "";
response.ContentEncoding = System.Text.Encoding.Default;
response.ContentType = "application/vnd.ms-excel";
response.AddHeader("Content-Disposition", "attachment;filename=\"dataImportTemplate.xls\"");
using (StringWriter sw = new StringWriter())
{
using (HtmlTextWriter htw = new HtmlTextWriter(sw))
{
System.Web.UI.WebControls.DataGrid dg = new System.Web.UI.WebControls.DataGrid();
dg.DataSource = ds.Tables[0];
dg.ShowHeader = false;
dg.DataBind();
dg.RenderControl(htw);
response.Write(sw.ToString());
}
}

If you export to a csv it keeps the gridlines.
This is a pretty simple workaround that a lot of people opt to use.
See similear post Here
That post includes a helper function that supposedly can add the gridlines to your export.
Hope this helps.