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Can I send optional parameters (empty strings, null int?'s etc) to an action through a GET request in asp.net mvc? (one sentence question!)
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To declare optional function parameters in JavaScript, there are two approaches: Using the Logical OR operator ('||'): In this approach, the optional parameter is Logically ORed with the default value within the body of the function. Note: The optional parameters should always come at the end on the parameter list.
You can then use @DefaultValue if you need it: @GET @Path("/job/{param1}/{param2}") public Response method(@PathParam("param1") String param1, @PathParam("param2") String param2, @QueryParam("optional1") String optional1, @QueryParam("optional2") @DefaultValue("default") String optional2) { ... }
Named optional parameters You can call getHttpUrl with or without the third parameter. You must use the parameter name when calling the function. You can specify multiple named parameters for a function: getHttpUrl(String server, String path, {int port = 80, int numRetries = 3}) { // ... }
You can do optional parameters with the routing table fairly easily, just specify the defaults in the route of the global.cs file.
So for a search page with an optional query and page you would have something like
RouteTable.Routes.Add(new Route
{
Url = "Search/[query]/[page]",
Defaults = new { controller="Search", action="Results", page=1 },
RouteHandler = typeof(MvcRouteHandler)
});
Default page for your search is then 1.
This example is found here on Scott Gu's blog.
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