如何用_（下劃線）替換字符串中的空格？

Question

假設初始的字符串是

String result= "Welcome To All" for that i need updated result as 
String result="Welcome_To_All" string value is dynamic,how can i do that,thank for help? 

Answer 1

我相信這是你在找什麼

string oldstr = "Hello World"; 
    string s = oldstr.Replace(" ", "_"); 
    (s == "Hello_World"); 

Answer 2

我要猜你正在使用JavaScript和你確定使用正表達式。

result = result.replace(/ /g, "_");