Use LINQ to Find All Web Applications that Use a Specific Service Application in SharePoint 2010


I was working on some code today when I had a bit of an unusual problem.  I had a SearchServiceApplicationProxy and I wanted to find out all of the web applications that were using it.  There were a few different routes I could take, most of them which would require churning through some number of collections in a way I usually hate.  I decided instead to use LINQ to write a query to find the web apps and it actually worked the first time (a minor miracle in my world).  So here's the code that I used; especially in SharePoint 2010 with so many collections of things all over the place, and this thing has some relationship to that thing, I find I'm using LINQ a lot more when writing code.

//get my service app proxy

SearchServiceApplicationProxy p = myCodeThatGetsTheServiceAppProxy();

 

//get a reference to the web service to snag the list of web apps from

SPWebService ws = SPWebService.ContentService;

 

//write a LINQ query to get all the web applications that use

//this service application proxy

var waps = from SPWebApplication wp in ws.WebApplications

where wp.ServiceApplicationProxyGroup.Proxies.Contains((SPServiceApplicationProxy)p)

select wp;

 

//do something with the results

foreach (SPWebApplication wap in waps)

{

//do something with the results

}

Comments (1)

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