.NET的字符串操作问题

Question

我怎么能从下面删除仅第一个逗号+空格，如果它在那里什么也没做。

string comments = ", 38, ";

Answer 1

if( comments.StartsWith(", ") && comments.Length > 2 ) {
  comments = comments.Substring(2);
}

Answer 2

The best way would be to use the String.TrimStart(...) method.

string comments = ", 38, ";
string commentsOK = "38, ";

string trimmedComments = comments.TrimStart(',', ' ');
string trimmedCommentsOK = commentsOK.TrimStart(',', ' ');

After this both trimmedComments and trimmedCommentsOK would have the value "38, " .

String.TrimStart method reference: http://msdn.microsoft.com/en-us/library/system.string.trimstart.aspx