private static object CalculatePageName(ActionContext context, RouteValueDictionary ambientValues, string pageName)
{
Debug.Assert(pageName.Length > 0);
// Paths not qualified with a leading slash are treated as relative to the current page.
if (pageName[0] != '/')
{
// OK now we should get the best 'normalized' version of the page route value that we can.
string currentPagePath;
if (context != null)
{
currentPagePath = NormalizedRouteValue.GetNormalizedRouteValue(context, "page");
}
else if (ambientValues != null)
{
currentPagePath = ambientValues["page"]?.ToString();
}
else
{
currentPagePath = null;
}
if (string.IsNullOrEmpty(currentPagePath))
{
// Disallow the use sibling page routing, a Razor page specific feature, from a non-page action.
throw new InvalidOperationException(Resources.FormatUrlHelper_RelativePagePathIsNotSupported(pageName));
}
return(ViewEnginePath.CombinePath(currentPagePath, pageName));
}
return(pageName);
}
private static object CalculatePageName(ActionContext context, RouteValueDictionary ambientValues, string pageName)
{
Debug.Assert(pageName.Length > 0);
// Paths not qualified with a leading slash are treated as relative to the current page.
if (pageName[0] != '/')
{
// OK now we should get the best 'normalized' version of the page route value that we can.
string currentPagePath;
if (context != null)
{
currentPagePath = NormalizedRouteValue.GetNormalizedRouteValue(context, "page");
}
else if (ambientValues != null)
{
currentPagePath = Convert.ToString(ambientValues["page"], CultureInfo.InvariantCulture);
}
else
{
currentPagePath = null;
}
if (string.IsNullOrEmpty(currentPagePath))
{
// Disallow the use sibling page routing, a Razor page specific feature, from a non-page action.
// OR - this is a call from LinkGenerator where the HttpContext was not specified.
//
// We can't use a relative path in either case, because we don't know the base path.
throw new InvalidOperationException(Resources.FormatUrlHelper_RelativePagePathIsNotSupported(
pageName,
nameof(LinkGenerator),
nameof(HttpContext)));
}
return(ViewEnginePath.CombinePath(currentPagePath, pageName));
}
return(pageName);
}