读取某个txt文件,并统计字母个数读取一个txt文件（内容为英文）,取每个单词的首字母,统计这些字母的个数（例如：a:23个,b:22个……z：2个）,不分大小写,貌似要用到index（）,thankyou!

Question

读取某个txt文件,并统计字母个数
读取一个txt文件（内容为英文）,取每个单词的首字母,统计这些字母的个数（例如：a:23个,b:22个……z：2个）,不分大小写,貌似要用到index（）,thank you!

Answer 1

用linq就可以.
private string StatisticsLetters(string text)
{
StringBuilder sb = new StringBuilder();
string s = text;
var statistics =
from c in s
group c by c into g
select new { g.Key,count = g.Count() };
var mostFrequestFirst =
from entry in statistics
orderby entry.count descending
select entry;
foreach (var entry in mostFrequestFirst)
{
sb.AppendFormat("{0}:{1}{2}",entry.Key,entry.count,System.Environment.NewLine);
}
return sb.ToString();
}