如何使用C＃使用多个条件运算符

Question

I want to use combination of the 2 operators: the && and the || operator using C#. I have 5 variables that I would like to make sure if these conditions are met. varRequestedDate varTotdayDate varExpectedDate Approval1 Approval2 Here is what I have for my current condition but would like to add other variables adding the OR operator:

if (varRequestedDate != ("&nbsp;") && varExpectedDate < varTotdayDate)

here is the pseudocode for what I would like to see after the updated version:

(if varRequestedDate is not blank 
and varExpectedDate is less than varTotdayDate
and either Approved1 OR Approved2 = Yes)
send email()

i cannot figure out how to do this. thanks

Answer 1

You just have to add nested parentheses:

if (varRequestedDate != " " 
    && varExpectedDate < varTotdayDate
    && (Approved1 == "Yes" || Approved2 == "Yes")
)
    sendEmail();

Answer 2

For the sake of readability and expressiveness I would extract the boolean values into meaningfully named variables:

var isDateRequested = varRequestedDate != (" ");
var isDateWithinRange = varExpectedDate < varTotdayDate;
var isApproved = Approved1 == "Yes" || Approved2 == "Yes";

if (isDateRequested && isDateWithinRange && isApproved)
{...}

Answer 3

You can nest logical operators using parentheses (just like arithmetic operators). Otherwise they follow a defined precedence going left to right.

if (
    varRequestedDate !=(" ") && 
    varExpectedDate < varTodayDate && 
    (Approved1==Yes||Approved2==yes))