Some useful Extensions methods

Extension methods have been around a while now and I like them more every day. Oh I know they are just aliased static methods, but they are convenient for small common situations where it seems like the framework developers missed something out.

Here's a few of my that I find useful:

NameValueCollection Extensions:

/// <summary>
/// Returns the collectionas a standard URL type QueryString
/// </summary>
/// <param name="self">The self.</param>
/// <returns></returns>
public static string ToQueryString(this NameValueCollection self)
{
    string qsString = string.Empty;
    if (self.Count > 0)
    {
        StringBuilder qsBuilder = new StringBuilder("?");

        for (int i = 0; i < self.Keys.Count; i++)
        {
            if (self.Keys[i] != null && self.Keys[i].Length > 0)
            {
                qsBuilder.AppendFormat("{0}={1}&", HttpContext.Current.Server.UrlEncode(self.Keys[i]), HttpContext.Current.Server.UrlEncode(self[i]));
            }
        }

        qsString = qsBuilder.ToString();
    }

    return qsString;
}


/// <summary>
/// Creates a copy the specified NameValueCollection.
/// </summary>
/// <param name="self">The NameValueCollection.</param>
/// <returns></returns>
public static NameValueCollection Copy(this NameValueCollection self)
{
    return new NameValueCollection(self);
}

String Extensions

/// <summary>
/// Capitalizes the specified word.
/// </summary>
/// <param name="word">The word.</param>
/// <returns></returns>
public static string Capitalize(this string word)
{
    if (word.IsNullOrEmpty())
    {
        return word;
    }

// The aggregate is because IEnumerable.ToString doesn't return the characters as a string, it returns the type's name as a string.
    return word[0].ToString().ToUpper() + word.Skip(1).Aggregate("", (s, c) => s + c);
}


/// <summary>
/// Splits the specified string into a list of white-space separated word strings.
/// </summary>
/// <param name="s">The s.</param>
/// <returns></returns>
public static IEnumerable Wordify(this string s)
{
    return s.Split(new char[]{' ', '\n', '\t', '\r', '.', ',', ';', ':', '-'}, StringSplitOptions.RemoveEmptyEntries);
}