public static string EnumerableToString <T>(IEnumerable <T> enumerable, string separator)
{
if (enumerable == null)
{
return(String.Empty);
}
NullUtil.CheckForNull(separator, "separator");
StringBuilder sb = new StringBuilder();
foreach (T obj in enumerable)
{
if (obj != null)
{
string str = obj.ToString();
if (StringUtil.IsNotNullOrWhitespace(str))
{
sb.Append(str);
sb.Append(separator);
}
}
}
if (sb.Length != 0)
{
return(sb.Remove((sb.Length - separator.Length), separator.Length).ToString());
}
return(String.Empty);
}
public static string ReplaceFirst(this string value, string oldValue, string newValue, StringComparison comparison)
{
NullUtil.CheckForNull(oldValue, "oldValue");
if (newValue == null)
{
newValue = String.Empty;
}
string str1 = value;
if (StringUtil.IsNotNullOrWhitespace(value))
{
int len = value.IndexOf(oldValue, comparison);
if ((0 <= len) && (len < value.Length))
{
string str2 = String.Empty;
if (len > 0)
{
str2 = value.Substring(0, len);
}
string str3 = String.Empty;
int startIndex = checked (len + oldValue.Length);
if (startIndex < value.Length)
{
str3 = value.Substring(startIndex);
}
str1 = (str2 + newValue + str3);
}
}
return(str1);
}
public static string GetUrlDirectory(string url)
{
NullUtil.CheckForNull(url, "url");
int len = url.IndexOf(CharUtil.QuestionMark);
if (len >= 0)
{
url = url.Substring(0, len);
}
string dirName;
string leafName;
SplitUrl(url, out dirName, out leafName);
return(dirName);
}
public static List <String> GetQueryStringKeys(Uri uri)
{
NullUtil.CheckForNull(uri, "uri");
List <String> list = new List <String>();
string query = uri.Query;
if ((StringUtil.IsNotNullOrWhitespace(query)) && (query.Length > 1))
{
string str = query.Substring(1);
StringSplitOptions options = StringSplitOptions.RemoveEmptyEntries;
string str2 = str;
char[] sep = new char[1] {
CharUtil.Ampersand
};
int num = (int)options;
foreach (string str3 in str2.Split(sep, options))
{
list.Add(str3.Split(new char[1] {
CharUtil.EqualSign
}, options)[0]);
}
}
return(list);
}
