lko lko - 22 days ago 20
C# Question

Convert a Dictionary to string of url parameters?

Is there a way to convert a Dictionary in code into a url parameter string?

e.g.

// An example list of parameters
Dictionary<string, object> parameters ...;
foreach (Item in List)
{
parameters.Add(Item.Name, Item.Value);
}

string url = "http://www.somesite.com?" + parameters.XX.ToString();


Inside MVC HtmlHelpers you can generate URLs with the UrlHelper (or Url in controllers) but in Web Forms code-behind the this HtmlHelper is not available.

string url = UrlHelper.GenerateUrl("Default", "Action", "Controller",
new RouteValueDictionary(parameters), htmlHelper.RouteCollection ,
htmlHelper.ViewContext.RequestContext, true);


How could this be done in C# Web Forms code-behind (in an MVC/Web Forms app) without the MVC helper?

Answer

One approach would be:

var url = HttpUtility.UrlEncode(
    string.Format("http://www.yoursite.com?{0}",
        string.Join("&",
            parameters.Select(kvp =>
                string.Format("{0}={1}", kvp.Key, kvp.Value)))));

And you could get rid of the UrlEncode if you don't need it, I just added it for completeness.

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