COnvert String变量为vb.net中的COnst字符串 [英] COnvert String Variable to COnst string in vb.net

问题描述

亲爱的所有人，



我需要将一个字符串值传递给const字符串值。我将附加下面的代码。我将字符串变量传递给const字符串需要持续表达错误获取。

  Dim  s 作为 字符串 =   sss 
  Const  ZSTransID  As   String  = s 

请帮我解决



问候

Sreejith

解决方案

我担心首先你需要了解Constant在.Net中的含义。在这里阅读文档是MSDN：



http ：//msdn.microsoft.com/en-us/library/zb8fth98.aspx [ ^ ]



在上面的示例中，您需要了解对常量的赋值只能是编译时常量。这是你仍然可以做的（它在C＃中），但基本上意味着你必须将s声明为常量。



我不确定在实践中是否会对你有帮助。

  const   string  s =  < span class =code-string> sss; 
  const   string  ZSTransID = s; 

顺便说一下，你可能想看一下 ReadOnly [ ^ ]关键字以及比较它与Const。



Const and只读关键字 [ ^

Dear All,

I need to pass a string value to const string value.I will attach the code below.While I pass the string variable to const string "constant expression required " error getting.

Dim s As String = "sss"
Const ZSTransID As String = s

Please help me to solve

Regards
Sreejith

解决方案

I am afraid that first you need to understand what Constant is in .Net. Read the documentation is MSDN here:

http://msdn.microsoft.com/en-us/library/zb8fth98.aspx[^]

In you above example, you need to understand that an assignment to a constant can only be a compile time constant. This is what you could still do (it's in C#), but basically means that you have to declare s as constant as well.

I am not sure if in practice that would help you.

const string s = "sss";
const string ZSTransID = s;

Btw, you might want to look at the ReadOnly [^]keyword as well and compare it with Const.

Const and Readonly Keywords[^]

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