ASP.NET MVC: C# Download file and save as dialog

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Setting mime type for excel document 5 answers

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Given that is an Excel doc saved at c:tempexcelDoc.xls and given that you have a WebForm that has a link like this

<asp:LinkButton runat="server" ID="GetExcel" OnClick="GetExcel_Click">Download</asp:LinkButton>

In your code-behind you can read the file from disk and send to the user by something like this

    protected void GetExcel_Click(object sender, EventArgs e)
    {
        var fileName = "excelDoc.xls";
        using (var cs = new FileStream(@"c:temp" + fileName, FileMode.Open))
        {
            Response.Clear();
            Response.AddHeader("content-disposition", "attachment; filename=" + fileName);
            Response.ContentType = "application/vnd.ms-excel";


            byte[] buffer = new byte[32768];
            int read;
            while ((read = cs.Read(buffer, 0, buffer.Length)) > 0)
            {
                Response.OutputStream.Write(buffer, 0, read);
            }

            Response.End();
            Response.Flush();
        }
    }

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