SSRS: Web Service API - Get and Filter dependent parameters
<p>I am using the <a href="https://www.nuget.org/packages/Microsoft.ReportViewer.Runtime.WebForms/" rel="nofollow noreferrer">ReportViewer control</a> with custom built built custom parameters panel. I have used only the <a href="https://msdn.microsoft.com/en-us/library/reportservice2010.aspx" rel="nofollow noreferrer">web service</a> so far to get all reports and their parameters to build the UI for the parameters.</p>

<p>My question is about Chained/Dependent parameters - I can not find a method in the existing <a href="https://msdn.microsoft.com/en-us/library/reportservice2010.aspx" rel="nofollow noreferrer">ReportService2010</a> web services documentation that will give me a way to get parameter dependent values based on another parameter. In other words I need to filter parameter values dependent and another parameter.</p>

<p>What is the best way to get the details of dependet parameters and filter them? 
I wanted to avoid querying the Reporting Services database and wanted to acheive this via the web service layer only, is this possible?...</p>

<p>I also looked breifly at the network traffic in the browser developer tools at the default web based Microsoft implementation hoping to see web service calls there but there were none. Instead every parameter is hosted in an iframe wich is refreshed with client side code and no web service calls - I have to dig further...</p>