CODEWITHSUNDEEP
silverlightquery-string
rjdevereux
rjdevereux

Reputation: 1892

Do you expect query string parameter names to be case sensitive?

Silverlight is case sensitive for query string parameters so the following code would return false with "callid=5"

string callId;
if (System.Windows.Browser.HtmlPage.Document.QueryString.TryGetValue("callId", out callId))
{
....
}

Microsoft defends the decision by citing the www.w3.org spec, but I think it leads to a less friendly experience for people trying to link to you, or give a URL over the phone.

Looks like Stackoverflow is case insensitive: https://stackoverflow.com/search?q=silverlight+bug https://stackoverflow.com/search?Q=silverlight+bug

Upvotes: 5

Views: 15202

Answers (4)

alkasai
alkasai

Reputation: 4033

I did this. Don't know if it helps.

var keyName = "";
if (!string.IsNullOrEmpty(keyName = someDictionary.SomeKeys.FirstOrDefault(k => k.ToLowerInvariant() == "size")))
{
    var someValue = someDictionary[keyName];
}

Upvotes: 1

Oskar Sjöberg
Oskar Sjöberg

Reputation: 2888

This workaround will not use the power of dictionaries because it will iterate through all keys, but it is likely to be a sufficient work-around for most scenarios.

var keyName = HtmlPage.Document.QueryString.Keys.SingleOrDefault(key => key.Equals("callid", StringComparison.OrdinalIgnoreCase));

string callid;
HtmlPage.Document.QueryString.TryGetValue(keyName, out callid)

You could also transform the whole QueryString dictionary to a new dictionary with a case insensitive comparer if you are having many dictionary lookups.

var insensitiveQueryString = HtmlPage.Document.QueryString.ToDictionary(pair => pair.Key, pair => pair.Value, StringComparer.OrdinalIgnoreCase);

Upvotes: 0

Jeff Yates
Jeff Yates

Reputation: 62397

I think you should focus on your naming conventions rather than the implementations of standards, making sure to avoid similar field names and mixed case. For example, you can use a convention of words that over the phone can be read out stating "all lowercase" or "all uppercase".

Upvotes: 6

Mitchel Sellers
Mitchel Sellers

Reputation: 63136

Yes, I'm used to it being case sensitive, and therefore have been programming to it for a long time. I know of some people that have implemented methods to do intermediate parsing to convert them all to lowercase, or other things server side, and it really depends on what you are working with specifically.

As for usability, yes it is harder to read. BUT, at the same time a URL over the phone that has a querystring is not easy to give out anyway.

Upvotes: 0

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