字符串的数值输出 [英] Numeric Output from string

问题描述

我们可以在vb.net中从(5000 + 400-300)* 12/100"获取输出，但输出应为数字格式，而不是字符串格式.

输出应为612
我怎么才能得到它，因为数组在这里不能正常工作.

Can we get output from "(5000+400-300)*12/100" in vb.net but output should be in numeric format not string format.

Output should be 612
How can i get it bacause array is niot working here.

推荐答案

您需要计算表达式.看一下:运行时C#表达式评估器 [

You need to evaluate the expression. Have a look at this: Runtime C# Expression Evaluator[^] - it''s in C#, but all the principles hold the same for VB.

有两种方法，
1. 创建函数以解析字符串&评估它，例如运行时C#表达式评估器 [

there are 2 ways,
1. create function to resolve string & evalute it e.g. Runtime C# Expression Evaluator[^] as given in solution 1

2. if you are using sql server also, then

equ= "(5000+400-300)*12/100"
cmd.commandtext="select " & equ
dim ans=cmd.executescalar()

祝您编程愉快！
:)

Happy coding!
:)

我的问题已解决.解决方案是您必须为此创建一个函数(选择"5000 + 1000").接受该字符串并进行计算，然后以数字格式返回值.

My question is solved .the solution is you have to make a function for like this (select ''5000+1000''). which accept this string and calculate it then return value to you in numeric format.

这篇关于字符串的数值输出的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！