比較結束字符列出

Question

我想一個字符串的最後一個字符比較已知值的列表，如果任何已知值的匹配結束字符，設置一個標誌。我已經想出瞭如何做到這一點與一個字符，但我似乎無法弄清楚如何做到這一點與列表。誰能幫忙？這是我到目前爲止的代碼：

StringBuilder myGrade = new StringBuilder(); 

// then I pull some data, calculate some stuff, give a grade, build the string, etc. The resulting text can vary, but the grade letter will always be last. 

var goodGrades = new List<string> { "A", "B", "C" }; 
string endStr = myGrade.ToString(); 
endStr = endStr.Substring(Math.Max(0, endStr.Length - 1)); 
if (endStr == "A") 
    //do some stuff for passing grades 
else 
    //do some other stuff for failing grades 

同樣，這完全適用於單個字符...但我將如何去在goodGrades列表檢查每一個項目？有沒有正則表達式的可能性？先謝謝您的幫助。

Answer 1

if(goodGrades.Contains(endStr)) 
{ 
    //Do something. 
} 

此外，這也適用於字符。如果你試圖比較一個角色，這是一個更好的方法。

//Create a list of chars instead of strings 
List<char> goodGrades = new List<char>(){'A', 'B', 'C'}; 
//Get the last char of your string by index 
char endChar = myGrade.ToString()[myGrade.Length - 1]; 

//See if char is contained in list of chars 
if(goodGrades.Contains(endChar)) 
{ 
    //Do something 
} 

Answer 2

msdn

if (goodGrades.Contains(endStr)) 
    do something 
else 

Answer 3

只需使用List.Contains

if (goodGrades.Contains(endStr)) { 
    ... 
}