+ 和 & 的区别用于在 VB.NET 中连接字符串 [英] The difference between + and & for joining strings in VB.NET

问题描述

+ 和 & 在 VB.NET 中连接字符串有什么区别?

What is the difference between + and & for joining strings in VB.NET?

推荐答案

如果两个操作数都是字符串，则没有区别.然而，如果一个操作数是一个字符串，一个是一个数字，那么你就会遇到问题，请看下面的代码.

There's no difference if both operands are strings. However, if one operand is a string, and one is a number, then you run into problems, see the code below.

"abc" + "def" = "abcdef"
"abc" & "def" = "abcdef"
"111" + "222" = "111222"
"111" & "222" = "111222"
"111" & 222 = "111222"
"111" + 222 = 333
"abc" + 222 = conversion error

因此，我建议在要连接时始终使用 &，因为您可能试图将整数、浮点数、十进制数连接到字符串，这将导致异常，或者充其量，不要做你可能想让它做的事情.

Therefore I recommend to always use & when you mean to concatenate, because you might be trying to concatenate an integer, float, decimal to a string, which will cause an exception, or at best, not do what you probably want it to do.

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