MVC exports data to Excel new method: Convert view or partial view to HTML before returning directly to Fileresult

New ways to export data to Excel: Convert a View or partial view to HTML and return directly to the Fileresult export Excel method Summary:
There are many ways in which MVC exports data to Excel, which is common:

1. Use the Excel COM component to dynamically generate the XLS file and save it to the server, then go to the file storage path;
Advantages: You can set rich Excel format, disadvantage: Need to rely on Excel components, and Excel process in the server can not close in time, and the server will persist a large number of unnecessary XLS files;

2. Set the output header to: Application/ms-excel, and then output the stitching HTML table data;
Advantages: No components, can set some simple format, disadvantage: Splicing HTML table process is more complex, not intuitive;

3. With third-party components (e.g., npoi)
The pros and cons are dependent on the ease of use of third-party components and are not described here;

Implementing a new Export Excel method under MVC
Here is a new way to share in MVC: Convert a View or partial view to HTML and return directly to Fileresult to easily export Excel functionality;

First look at the contents of the partial view (indexdatalist):

@model Ienumerable<ccps. Models.data.customercommentinfo>@using Pagedlist.mvc;<table> <thead> <tr> <th> opinions id</th> <th> Organization </th> <th> license plate </th> <th> models </th> <th> Royal version </th> <t H> Customer </th> <th> Customer Phone </th> <th> Responsible Department </th> <th> responsible Team <            /th> <th> Business Advisors </th> <th> opinion types </th> <th> status </th> <th> Entry Clerk </th> <th> entry Time </th> </tr> </thead> <tbody id="List-table-body">@foreach (varIteminchModel) {            stringClassName =""; if(item. Status = ="Audit not processed") {ClassName="Uncl_yellow"; if(item. Auditdatetime! =NULL&& datetime.now > (DateTime) item. Auditdatetime). AddHours ( -) ) {ClassName="uncl_red"; }            }            <trclass="@className"data-adt="@item. Auditdatetime"> <td><a href="Http://oa.pfcn.com/flow/[email protected]&flow_id=147"target="_blank"> @item. id</a></td> <td> @item .orgname</td> <td> @item. Plateno</td> <td> @item. Model</td> <td> @item. Isroyalver</td> <td> @item. Customername</td> <td> @item. Customerphoneno</td> <td> @item. Relevantdept</td> <td> @item. Relevantgroup</td> <td> @item. Consultant</td> <td> @item. Type</td> <td> @item. Status</td> <td> @item. Createby</td> <td> @string. Format ("{0:g}", item. Createdatetime) </td> </tr>        }    </tbody></table>@if (true!=viewbag.nopaging) { <divclass="Pager">@Html. Pagedlistpager (Model asPagedlist.ipagedlist<ccps. models.data.customercommentinfo>, page =string. Format ("javascript:turnpage ({0});", page), Pagedlistrenderoptions.classicplusfirstandlast)</div>}

My partial view here is not just for exporting Excel, so I can use it when I display the data with the main views, so I have a page to judge if I export Excel, that certainly does not need paging.
Here's how to implement generating HTML for a view, a partial view, with the following code:

[Nonaction]protected stringRenderviewtostring (Controller controller,stringViewName,stringmastername) {IView View=ViewEngines.Engines.FindView (Controller. ControllerContext, ViewName, Mastername).            View; using(StringWriter writer =NewStringWriter ()) {ViewContext ViewContext=NewViewContext (Controller. ControllerContext, view, controller. ViewData, Controller.                TempData, writer);                ViewContext.View.Render (ViewContext, writer); returnwriter.            ToString (); }} [Nonaction]protected stringRenderpartialviewtostring (Controller controller,stringpartialviewname) {IView View=ViewEngines.Engines.FindPartialView (Controller. ControllerContext, Partialviewname).            View; using(StringWriter writer =NewStringWriter ()) {ViewContext ViewContext=NewViewContext (Controller. ControllerContext, view, controller. ViewData, Controller.                TempData, writer);                ViewContext.View.Render (ViewContext, writer); returnwriter.            ToString (); }        }

These two methods are implemented according to the steps and principles of their view rendering, the general step is: Find View--materialized view context--render view to output container
Finally, you define an action method that exports Excel and return Fileresult, which completes the export of Excel functionality, with the following code:

         PublicActionResult Export (datafilter<customercommentinfo>[] filters) {            varResultlist = Dataprovider.getcustomercommentinfos (filters). (t =t.createdatetime); Viewbag.nopaging=true; Viewdata.model=resultlist; stringviewhtml = renderpartialviewtostring ( This,"indexdatalist"); returnFile (System.Text.Encoding.UTF8.GetBytes (viewhtml),"Application/ms-excel",string. Format ("Ccpi_{0}.xls", Guid.NewGuid ())); }

Isn't it simple? To export what kind of Excel format content, directly can be in the view of the design is OK.

MVC exports data to Excel new method: Convert a view or partial view to HTML and then return directly to Fileresult