How to save created excel file to Client pc in ASP.NET

Question

I am creating a excel report and html report in asp.net when I clik the button and my application create it and save to the client desktop but, it is not working correctly becau

Answer 1

You need to send the file to client using Response object. To ignore the warning message like when client is opening the excel file -

To prevent this you need to mention the content type and length in the response use the sample code

//Read the Excel file in a byte array. here pck is the Excelworkbook              
Byte[] fileBytes = pck.GetAsByteArray();

//Clear the response               
Response.Clear();
Response.ClearContent();
Response.ClearHeaders();
Response.Cookies.Clear();
//Add the header & other information      
Response.Cache.SetCacheability(HttpCacheability.Private);
Response.CacheControl = "private";
Response.Charset = System.Text.UTF8Encoding.UTF8.WebName;
Response.ContentEncoding = System.Text.UTF8Encoding.UTF8;
Response.AppendHeader("Content-Length", fileBytes.Length.ToString());
Response.AppendHeader("Pragma", "cache");
Response.AppendHeader("Expires", "60");
Response.AppendHeader("Content-Disposition",
"attachment; " +
"filename=\"ExcelReport.xlsx\"; " +
"size=" + fileBytes.Length.ToString() + "; " +
"creation-date=" + DateTime.Now.ToString("R") + "; " +
"modification-date=" + DateTime.Now.ToString("R") + "; " +
"read-date=" + DateTime.Now.ToString("R"));
Response.ContentType = "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet";
//Write it back to the client    
Response.BinaryWrite(fileBytes);
Response.End();