How to download a file using JQuery code from web api

Create a web api controller like below.

using System;

using System.Collections.Generic;

using System.Web.Http;

using System.Web.Http.Description;

using AdeptAccelerator.Application.Services.XML;

using System.Net;

using System.Net.Http;

using System.Net.Http.Headers;

using System.Configuration;

using AdeptAccelerator.API.Common;

namespace AdeptAccelerator.API.v1.Controllers.Domain.XML

{

    [RoutePrefix("api/domain/XML")]

    public class XMLController : BaseController

    {

        [HttpGet, Route("DownLoadXML")]

        [ResponseType(typeof(HttpResponseMessage))]

        public HttpResponseMessage DownLoadXML()

        {

            return DownloadXMLFile();

        }

    }

Create a method for getting xml file from local folder

public HttpResponseMessage DownloadXMLFile(string filename)

      {

     

          var fileinfo = new FileInfo(filename);

          if (!fileinfo.Exists)

          {

              throw new FileNotFoundException(fileinfo.Name);

          }

          try

          {

              HttpResponseMessage response = new HttpResponseMessage();

              response.Content = new StreamContent(File.OpenRead(filename));

              response.Content.Headers.ContentType = new MediaTypeHeaderValue("application/xml");

              response.Content.Headers.ContentDisposition = new ContentDispositionHeaderValue("attachment")

              {

                  FileName = "test.xml",

              };

              return response;

          }

          catch (Exception ex)

          {

              throw ex;

          }

      }

}

Now add below anchor tag into html.

<a  id = "btnDownloadXML"class="btn btn-info" href="#"><span>Download XML</span></a>

Copy and paste below JavaScript code to JavaScript file

$(document).on("click", "#btnDownloadXML", function () {

     jQuery.support.cors = true;  // This is for cross domain 

   var  url = apiDomain + "XML/DownLoadXML;

   var hiddenElement = document.createElement('a');

    hiddenElement.href = url;

    hiddenElement.download = 'test';

    hiddenElement.target = '_blank';

    hiddenElement.click();

    });

How to change xml file inner text or attribute value using c#.

   private XmlDocument ChangeXMLDoc(string filepath)

       {

           XmlDocument document = new XmlDocument();

            document.Load(filepath);

           XmlNodeList nodeList;

           nodeList  = document.GetElementsByTagName("PlanId");

     foreach (XmlNode xnode in nodeList)

          {

                 xnode.InnerText = "Hello world";  // This is for innertext value change 

           xnode.Attributes["code"].Value = "Hello world"; // This is for attribute value change.

          }

         

           return document;

}