计时器值错误 [英] Error In Timer Values

问题描述

大家好，

在我的项目中，我节省了y表单已打开的时间，因此我将表单的打开时间和关闭时间用于将它们组合为字符串变量，但是当我减去关闭时间和打开时间时，它会显示一个错误.

我在向减法值声明字符串varibale，但是它显示出这样的错误:

Hi all,

In my project I am saving the time on how long y form has been open, so I am taking my form''s open time and close time and assinging them into string variables but when I am subtracting close time and open time its showing an error.

I am assinging that subtraction value also string varibale but its showing error like this:

Conversion from string "9:02:53 PM" to type ''Double'' is not valid.

这是我遇到的错误.

This is the error I am getting.

推荐答案

您需要使用TimeSpan 对象进行时差计算.请参见此处 [

You need to use a TimeSpan object to do a time difference calculation. See here[^] for examples.

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