Question

I’m trying to return route values in my view using a function:

VIEW:

@functions {    
    public Dictionary<string, object> GetFilters()
    {
        var filters = new Dictionary<string, object>();
        var f_phrase = this.Request["f_phrase"] ?? string.Empty;
        var f_site = this.Request["f_site"] ?? string.Empty;
        var f_device = this.Request["f_device"] ?? string.Empty;
        var f_startdate = this.Request["f_startdate"] ?? string.Empty;
        var f_enddate = this.Request["f_enddate"] ?? string.Empty;
        var f_package = this.Request["f_package"] ?? string.Empty;

        filters.Add("f_phrase", f_phrase);
        filters.Add("f_site", f_site);
        filters.Add("f_device", f_device);
        filters.Add("f_startdate", f_startdate);
        filters.Add("f_enddate", f_enddate);
        filters.Add("f_package", f_package);

        return filters;
    }
}

Then on my link I want to be able to do this:

@Html.ActionLink("Export file", "Export", "Log", new { @GetFilters() }, new { @class="iconDocumentText"})

but doesn’t work.

Answer 1

From the MSDN on the routeValues parameter:

An object that contains the parameters for a route. The parameters are
retrieved through reflection by examining the properties of the
object. The object is typically created by using object initializer
syntax.

So you need to construct an object and return that instead of returning a dictionary (not sure, but maybe you can achieve this with dynamic/ExpandoObject or just create a custom type with properties named according to your route values).

Example:

public class FilterRouteValues
{
    public string f_phrase { get; set; }
    // ...
}

public FilterRouteValues GetFilters()
{
    // Read from request, fill an instance of FilterRouteValues
}

Markup:

@Html.ActionLink("Export file", "Export", "Log", GetFilters(), ...)