public static Uri SetParameter(this Uri url, string paramName, string value)
{
var queryParts = HttpUtility.ParseQueryString(url.Query);
queryParts[paramName] = value;
return(new Uri(url.AbsoluteUriExcludingQuery() + '?' + queryParts.ToString()));
}
public static Uri SetParameterIfDoesntExists(this Uri url, string paramName, string value)
{
if (url == null)
{
return(new Uri(string.Empty));
}
var queryParts = HttpUtility.ParseQueryString(url.Query);
if (string.IsNullOrEmpty(value))
{
queryParts.Remove(paramName);
}
else if (queryParts[paramName] == null)
{
queryParts[paramName] = value;
}
return(new Uri(url.AbsoluteUriExcludingQuery() + '?' + queryParts));
}