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2012-10-01T19:28:55.523
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2017-05-23T12:18:49.447
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OK, SlickGrid does not have any built in functionality so we have to roll it ourselves. Here is one answer from stackoverflow: <ul> <li><a href="https://stackoverflow.com/questions/6668613/slickgrid-ajax-data">SlickGrid AJAX data</a></li> </ul> And now here is my solution, which works a treat and I think is really easy. The technology stack for this is: <ul> <li>RavenDB </li> <li>NancyFX </li> <li>CoffeeScript</li> <li>SlickGrid</li> </ul> The CoffeeScript <pre><code>loadData=(grid)-> take = 600 loadingGlyph = $ "<img/>", {class:"loading", style:"float:right;margin-top:5px", src:"/Content/img/ajax-loader.gif", alt:"loading", width:"16", height:"16"} $(".slick-pager-status").after loadingGlyph for skip in [0..viewdata.UserCount] by take $.getJSON("/users/#{skip}/#{take}") .done (users) => grid.addRows users $(".loading").hide() if users.length < take $ -> columns = [..your columns..] grid = [..your slick-grid..] loadData grid </code></pre> First I stick in a fancy loading-glyph graphic to show the grid is busy. Note that I intend loading batches of data asynchronously. This will put the grid in a usable state very quickly (after the first batch returns) but the user needs to be told that the data is still downloading in the background. To batch load the data I loop in chunks whose size is determined by the value of <code>take</code> and terminating at the <code>viewData.UserCount</code> value. This has been pre-populated when the page was requested and is the total number of items available (or the maximum you wish to load). Finally I have made use of the <code>addRows</code> method I added to my slick-grid wrapper (not shown). This allows for the fast addition of row-batches and it looks like this: Extend Slick-Grid <pre><code>addRows:(rows)-> dataView.beginUpdate() dataView.addItem row for row in rows dataView.endUpdate() </code></pre> For the sake of completeness, here is the rest of process, including the RavenDB service call that does the batch data retrieval. NancyFX Module <pre><code>Get["/users/{skip}/{take}"] = parameters => { var skip = (int)parameters.skip; var take = (int)parameters.take; var data = UserService.GetForGrid(Db, skip, take); return Response.AsJson(data); }; </code></pre> RavenDB Service <pre><code>public static List<UserGridDTO> GetForGrid(IDocumentSession db, int skip=0, int take=512) { return db.Query<User>() .OrderBy(u=>u.Id) .Skip(skip) .Take(take) .ToList() .Select(user => new UserGridDTO { id = user.Id, Email = user.Email, Name = user.DisplayName, }) .ToList(); } </code></pre>
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