I have some values from MySQL . and I want to know ... how I can do the following :
if (Value.ToString() == "1" || Value.ToString() == "2" || Value.ToString() == "3" && SecondValue.ToString() == "5")
Value can be : 1 "or" 2 "or" 3 ... and Second Value "5" . means One of (the three "Value") && SecondValue . or there is no way to do that ? and I should just do this :
if (Value.ToString() == "1" && SecondValue.ToString() == "5"
{
}
if (Value.ToString() == "2" && SecondValue.ToString() == "5"
{
}
ect ....
Thank you for your answer .
Your code is almost correct but you need to add an extra parenthesis around the "or" conditions to group them.
if ((Value.ToString() == "1" || Value.ToString() == "2" || Value.ToString() == "3")
&& SecondValue.ToString() == "5")
我认为您要尝试的是:
if (new List<string>() { "1", "2", "3" }.Contains(Value.ToString()) && SecondValue.ToString() == "5")
You can use parenthesis to group your boolean conditions however you want. If you want a case where "one of these cases is true and also one of these other cases is true", group the cases appropriately. In your case, you'd be better off using a collection to hold your values for valid cases for "Value", something like:
var myValue = Value.ToString();
var myValidCases = new [] {"1", "2", "3"};
if(myValidCases.Any(validCase => validCase == myValue) && SecondValue.ToString() == "5")
{
//do something
}
if
(
(
Value.ToString() == "1" ||
Value.ToString() == "2" ||
Value.ToString() == "3"
) &&
SecondValue.ToString() == "5"
)
Here's what it looks like basically:
(Value == 1 && SecondValue == 5) || (Value == 2 && SecondValue == 5) || (Value == 3 && SecondValue == 5)
Now the && operator is very much like the multiplication operator in that it is distributive . Which means we can do this:
(Value == 1 || Value == 2 || Value == 3) && SecondValue == 5
Try this, it is clean enugh:
if (SecondValue.ToString() == "5")
{
if (Value.ToString() == "1" || Value.ToString() == "2" || Value.ToString() == "3")
{
//Do Stuff
}
}
Regards, Krekkon
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