C＃ - 如何分割字符串

Question

可能重複：
How to split string preserving whole words?

我有以下字符串：

string s = "The Electors shall meet in their respective states to vote by ballot for President and Vice-President."; 

我要採取的第一個60個字符，將它們分成兩個單獨的字符串，每個字符串不超過30個字符每個字符串必須以整個單詞開頭（不包含部分單詞，也不包含空格）。所以這是期望的結果：

string s1 = "The Electors shall meet in"; // 26 characters 
string s2 = "their respective states to vot"; // 30 characters 

謝謝。

Answer 1

string s = "The Electors shall meet in their respective states to vote by ballot for President and Vice-President."; 

string sSub = s.Substring(0,60); //first 60 letters 

string sSubSub = sSub.Substring(0,30); //at most 30 per string 

int index = sSubSub.LastIndexOf(' '); //finds the last space 

string firstString = sSub.Substring(0,index); //first string is up until that space of t he 60-letter string 

string secondSTring = sSub.Substring(index + 1, 30); //second string is the first 30 letters of the rest of the 60-letter string 

Answer 2

也許嘗試計算中點，然後在兩個方向上工作，直到找到空間。那就是你的分裂點。