How to export to excel in angular and web api using npm filesaver

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I want export to excel in angular and web api using npm filesaver

In Console I am getting the error message :
The request body isn't either a blob or an array buffer

Here is my code

Web Api :

C#

public HttpResponseMessage GetExcelData()
        {

            try
            {
                JobAssignment j = new JobAssignment();
              string filePath = j.GetExcelData();

                HttpResponseMessage result = new HttpResponseMessage(HttpStatusCode.OK);
                var stream = new FileStream(filePath, FileMode.Open, FileAccess.Read);
                result.Content = new StreamContent(stream);
                result.Content.Headers.ContentDisposition = new System.Net.Http.Headers.ContentDispositionHeaderValue("attachment") { FileName = Path.GetFileName(filePath) };
               // result.Content.Headers.ContentLength = stream.Length;
                result.Content.Headers.ContentType = new System.Net.Http.Headers.MediaTypeHeaderValue("application/octet-stream");

                return result;
            }
            catch (Exception ex)
            {
                HttpResponseMessage result = new HttpResponseMessage(HttpStatusCode.InternalServerError);
                return result;
            }
        }

Component :

C#

GetExcelData() {
  this.loaderService.GetExcelData()
    .subscribe(
    blob => {
      importedSaveAs(blob, "file1");
    },
    error => {
      this.errorMessage = <any>error
    });
}

service :

C#

 GetExcelData(): Observable<Blob> {
let headers = new Headers({ 'Content-Type': 'application/json' });
   let options = new RequestOptions({ headers: headers, responseType: ResponseContentType.Blob });
     let bodyString = {};
   return this.http.get(this.rootUrl + 'GetExcelData',{responseType: ResponseContentType.Blob})
     .map(res => res.blob())
     .catch(this.handleError);
 }

What I have tried:

I have changed

C#

result.Content.Headers.ContentType = new System.Net.Http.Headers.MediaTypeHeaderValue("application/vnd.ms-excel");

But it is not working.
Please tell me where I am wrong.

Posted 13-Aug-17 20:38pm

manish.communityhub

Updated 15-Aug-17 23:37pm

v2

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manish.communityhub · Answer 1 · 2017-08-15T23:36:00

Ok I got the solution, very simply we can do it.

Web Api

C#

public void GetExcelData()
{

    string sFileName = System.IO.Path.GetRandomFileName();
    string sGenName = "Friendly.xls";
    System.IO.FileStream fs = null;
    fs = System.IO.File.Open(HttpContext.Current.Server.MapPath("~/TextFiles/StudentWiseRegistrationReport__14082017_134859.xls"), System.IO.FileMode.Open);
    byte[] btFile = new byte[fs.Length];
    fs.Read(btFile, 0, Convert.ToInt32(fs.Length));
    fs.Close();
    HttpContext.Current.Response.AddHeader("Content-disposition", "attachment; filename=" + sGenName);
    HttpContext.Current.Response.ContentType = "application/octet-stream";
    HttpContext.Current.Response.BinaryWrite(btFile);
    HttpContext.Current.Response.End();
}

And In Component:

C#

window.location.href='http://localhost:1036/api/Employee/GetExcelData';

Excel sheet or text file can be downloaded in this way.