private string ToString(bool urlencoded, IDictionary excludeKeys)
{
int n = Count;
if (n == 0)
{
return(string.Empty);
}
StringBuilder s = new StringBuilder();
string key, keyPrefix, item;
for (int i = 0; i < n; i++)
{
key = GetKey(i);
if (excludeKeys != null && key != null && excludeKeys[key] != null)
{
continue;
}
if (urlencoded)
{
key = UrlUtility.UrlEncodeUnicode(key);
}
keyPrefix = (!string.IsNullOrEmpty(key)) ? (key + "=") : string.Empty;
ArrayList values = (ArrayList)BaseGet(i);
int numValues = (values != null) ? values.Count : 0;
if (s.Length > 0)
{
s.Append('&');
}
if (numValues == 1)
{
s.Append(keyPrefix);
item = (string)values[0];
if (urlencoded)
{
item = UrlUtility.UrlEncodeUnicode(item);
}
s.Append(item);
}
else if (numValues == 0)
{
s.Append(keyPrefix);
}
else
{
for (int j = 0; j < numValues; j++)
{
if (j > 0)
{
s.Append('&');
}
s.Append(keyPrefix);
item = (string)values[j];
if (urlencoded)
{
item = UrlUtility.UrlEncodeUnicode(item);
}
s.Append(item);
}
}
}
return(s.ToString());
}
internal void FillFromString(string s, bool urlencoded, Encoding encoding)
{
int l = (s != null) ? s.Length : 0;
int i = 0;
while (i < l)
{
// find next & while noting first = on the way (and if there are more)
int si = i;
int ti = -1;
while (i < l)
{
char ch = s[i];
if (ch == '=')
{
if (ti < 0)
{
ti = i;
}
}
else if (ch == '&')
{
break;
}
i++;
}
// extract the name / value pair
string name = null;
string value = null;
if (ti >= 0)
{
name = s.Substring(si, ti - si);
value = s.Substring(ti + 1, i - ti - 1);
}
else
{
value = s.Substring(si, i - si);
}
// add name / value pair to the collection
if (urlencoded)
{
base.Add(
UrlUtility.UrlDecode(name, encoding),
UrlUtility.UrlDecode(value, encoding));
}
else
{
base.Add(name, value);
}
// trailing '&'
if (i == l - 1 && s[i] == '&')
{
base.Add(null, string.Empty);
}
i++;
}
}