C#.NET和sprintf语法 [英] c#.NET and sprintf syntax

问题描述

如何将这些代码转换为C#，特别是如何在C#中实现 sprintf ?

How would this code be translated into C#, specifically how would sprintf be implemented in C#?

string output = "The user %s logged in";
string loggedIn = "is";
string loggedOut = "isn't";

if (TheUser.CheckStatus())
{
    output = sprintf(output, loggedIn);
}
else
{
    output = sprintf(output, loggedOut);
}

return output;

如果 TheUser.CheckStatus()为 false ，我希望看到用户未登录" .

I'm expecting to see "The user isn't logged in" if TheUser.CheckStatus() is false.

推荐答案

签出 string.Format ，这是使用它的代码版本:

Check out string.Format and here is a version of your code using it:

string output = "The user {0} logged in";
string loggedIn = "is";
string loggedOut = "isn't";

if (TheUser.CheckStatus())
{
    output = string.Format(output, loggedIn);
}
else
{
    output = string.Format(output, loggedOut);
}

return output;

或更简单地说:(使用三元表达式)

Or more simply: (using a ternary expression)

string output = "The user {0} logged in";

return TheUser.CheckStatus() 
    ? string.Format(output, "is")
    : string.Format(output, "isn't");

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