c#.NET 和 sprintf 语法

Question

如何将此代码翻译成 C#，具体如何 sprintf在 C# 中实现？

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;

我期待看到 "The user isn't logged in"如果TheUser.CheckStatus()是false .

Answer 1

查看 string.Format这是您使用它的代码版本:

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;

或者更简单:(使用三元表达式)

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

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