Passing two bool, and one string from a procedure.

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Sorry in advance if this is a very newbie question.

I have a routine that is used a lot throughout the program and subforms programs. To clean things up, I would like to have the code in one place, like a .dll. The problem is that it needs to return three values, two bool, and one string. I read I can do this with an object array, but I have no idea how to set it up and what the header would look like.

What I have tried:

private void VerifyDate(string thisDay, object [] status)
        {

Posted 3-Aug-22 15:10pm

PaulaJoannAllen

Updated 4-Aug-22 14:39pm

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PIEBALDconsult 3-Aug-22 21:22pm

Define a class or use a Tuple.

2 solutions

Solution 2

Added necessary code to an if statement.

Posted 4-Aug-22 14:39pm

PaulaJoannAllen

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Afzaal Ahmad Zeeshan · Accepted Answer · 2022-08-03T15:50:00

Solution 1

Quote:
The problem is that it needs to return three values, two bool, and one string.

Depends on what you need, and how much old C# language you need to support. But the latest version of C# can handle a Tuple easily.

C#

private Tuple<bool, bool, string> VerifyDate(string thisDay, object[] status) {

It should work just fine, and this would return the three values.

Read more here:
Tuple types - C# reference | Microsoft Docs[^]

More latest versions of the language will enable you to return the tuple structure with a more syntactic-sugar syntax:

C#

private (bool, bool, string) VerifyDate(string thisDay, object[] status) {

However, if you need to label the fields, it would be better to simply create a struct. The structures would provide better performance over class simply because they are put on the stack and not the heap.

Posted 3-Aug-22 15:50pm

Afzaal Ahmad Zeeshan

Updated 3-Aug-22 15:51pm

v2

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PaulaJoannAllen 4-Aug-22 10:09am

It almost works, but I get a

Compiler Error CS0161, method': not all code paths return a value

The code is long, so I will include what I think you need.

All the variables are declared and set in the code.

        
        //public (bool, bool, string) VerifyDate(string thisDay, object[] status)
        public Tuple <bool, bool, string> VerifyDate(string thisDay, object[] status)

                
                //status[3] = (dateError, dateNotValid, outDate);
                var retruneArray = new Tuple<bool, bool, string>(dateNotValid, dateError, outDate);

                return retruneArray;
                //return var retruneArray = new Tuple <bool, bool, string>(dateError,dateNotValid,outDate;
                //return status;
                //return ((bool, bool, string))(status[3] = (dateError, dateNotValid, outDate));

Afzaal Ahmad Zeeshan 4-Aug-22 14:47pm

Deleted

Afzaal Ahmad Zeeshan 4-Aug-22 15:26pm

That means you are not putting a return statement in one of the branches in the code. Since you have not shared the entire code, we don't know where the problem is.

PaulaJoannAllen 4-Aug-22 20:38pm

You were right; I found it in an if statement. I don't know how many times I looked there and did not see it.

Thank you