public static string ConvertToValidUrlFileName(string leafName, char charToReplaceInvalidChar)
{
if (string.IsNullOrEmpty(leafName))
{
throw new ArgumentNullException("leafName");
}
if (SPUrlUtility.IsLegalFileName(leafName))
{
return(leafName);
}
StringBuilder stringBuilder = new StringBuilder();
if (charToReplaceInvalidChar != 0 && !SPUrlUtility.IsLegalCharInUrl(charToReplaceInvalidChar))
{
charToReplaceInvalidChar = '\0';
}
bool flag = charToReplaceInvalidChar != '\0';
string text = leafName.Trim().Trim('.');
char c = '\0';
bool flag2 = false;
char[] array = text.ToCharArray();
foreach (char c2 in array)
{
if (!SPUrlUtility.IsLegalCharInUrl(c2) || (c2 == '.' && c == '.'))
{
flag2 = true;
}
else
{
if (flag2 && flag)
{
stringBuilder.Append(charToReplaceInvalidChar);
flag2 = false;
}
stringBuilder.Append(c2);
c = c2;
}
}
return(stringBuilder.ToString());
}