Can i apply JSLINK to my WebPart inside my Event Receiver

Question

I have an event receiver which get fired when and item is create. the event receiver will create a new sub-site based on a site template. here is part of the code which is responsible for creating the subsite:-

SPWeb newSite = spCurrentSite.Webs.Add(curItemID, curItemSiteName, "created automatically after adding a new project item", Convert.ToUInt16(1033), webTemplate, false, false);
newSite.Navigation.UseShared = true;
string masterPage = "Custom.master";
var masterUri = new Uri(rootWeb.Url + "/_catalogs/masterpage/" + masterPage);
newSite.BreakRoleInheritance(true, true);
SPGroup group = newSite.SiteGroups["Project Requestors"];
newSite.RoleAssignments.RemoveById(group.ID);
//newSite.Permissions.Remove();
newSite.MasterUrl = masterUri.AbsolutePath;

newSite.CustomMasterUrl = masterUri.AbsolutePath;

newSite.Update();

newSite.Dispose();

now inside the new subsite there is a list named "Business Risks". and inside the "AllItems" view webpart, i want to assign a JSLINK to the webpart. now using the UI i can simply follow these 4 steps:-

1. go to the Allitems view page.
2. edit the page.
3. edit the webpart.
4. then under the WebPart Miscellaneous tab to specify the location of the JSLINK.

so can i do these steps inside the event receiver ?

Answer 1

Try the below code after your subsite is created:

Option 1: - easier, simpler

SPList brlist = web.Lists.TryGetList("Business Risks");
SPView brlistDefaultView = brlist.DefaultView;
brlistDefaultView.JSLink = "/path-to-jslink/jslink.js";
brlistDefaultView.Update()
web.Update();

Option 2: - a bit more complex

SPList list = web.Lists.TryGetList("Business Risks");
if(list!=null)
{
    var file = list.ParentWeb.GetFile(list.Forms[PAGETYPE.PAGE_DEFAULTVIEW].Url);
    // var file = list.ParentWeb.GetFile("/path-to-allitems.aspx");
    file.CheckOut();

    using (var manager = file.GetLimitedWebPartManager(PersonalizationScope.Shared))
    {
        var webPart = manager.WebParts.OfType<ListFormWebPart>().FirstOrDefault();
        //var webPart = manager.WebParts[0];
        if (webPart != null)
        {
            webPart.JSLink = "/path-to-jslink/customjslink.js"; //change as per your file name
            manager.SaveChanges(webPart);
        }
    }

    file.CheckIn("Added JSLink to the Form");
}

Here, web is the SPWeb object of the created subsite.

Answer 2

When you create a site based on a template which includes your "Business Risks"-list, this process includes a hidden step where a List View Web Part associated to the "Business Risks"-list is created. This web part, which isn't directly available in the web part gallery, is therefore a unique instance with unique identifying properties. So now we have a List and a List View Web Part, which are associated, but two different things.

When you want to display your list using AllItems-view, this is done using the auto-created List View Web Part, which in 2013-version is masked as adding an app to a page. So when your template includes a page with an app of your list, the page actually has the List View Web Part of your list.

This is all coming down to the part where you don't actually have access to your to-be-created List View Web Part until it actually is created. Hence every time you create a site based on a template, you need to do the described action steps in order to add the JSLINK to your web part.

Edit: There has been a similar question earlier: Keep JS Link when adding a list as a webpart. This includes a link to Ms's documentation which describes List View Web Parts in more detail.