Whenever we start any new project we tend to write some Utilities class with frequently used methods like GetItem, EditItem, etc. and also, adding & retrieving query strings using UriBuilder/HttpUtility.ParseQueryString API.
Sitecore uses query strings like sc_mode, sc_lang etc. This got me a thinking.
Sitecore should have come up with its own methods for adding & retrieving query strings.
Luckily we have such methods in Sitecore.Web.WebUtil class, syntax below,
Sitecore.Web.WebUtil.AddQueryString(<em>url</em>, <em>key1</em>, <em>value1</em>, <em>key2, value2</em>)
Sitecore.Web.WebUtil.GetQueryString(<em>key</em>)
AddQueryString method will encode the query string values (in case of special characters), so url encoding using HttpUtility.UrlEncode is not required. In case of decoding, ExtractUrlParm & ParseQueryString methods will help.
Hope this will save you some lines of code and time.
Originally Posted at: https://www.nttdatasitecore.com/Blog/2017/March/Sitecore-API-for-Adding-Retrieving-Query-Strings