Question

I have 2 Index Actions Post And Get when I submitted form the Post Action returned:

return RedirectToAction("Index");

Edit:

My get Index Action can get some parameters to support search and filter returned List. like this:

public ActionResult Index(string search = "", long searchItem = 0, long RC = 0, long Page = 1)

I used Paged List and there is a DropDownList that show Numbers of row in per page, I Write a jquery script to change of this dropdown form.submited and when form submitted
in RedirectTAction I lost my parameters the followings Code:

[HttpPost]
public ActionResult Index(FormCollection collection, string search = "") {

    long RowCount = 0;
    long.TryParse(string.Format("{0}", collection["RowCount"]), out RowCount);

//More implement

return RedirectToAction("Index", new { RC = RowCount, search = search, searchItem = Id });

So is there any way to Get Url or url parameters in Post Action? What is your suggestion in situations like this?

Answer 1

You could capture all query string parameters in a RouteValueDictionary before redirecting:

var query = new RouteValueDictionary(
    Request
        .QueryString
        .Keys
        .OfType<string>()
        .ToDictionary(key => key, key => (object)Request.QueryString[key])
);
return RedirectToAction("Index", query);

This will only keep the query string parameters. If you want to add route values and POSTed values you could concatenate them to the result.