How to unzip an arraylist in C#?

Question

0.00/5 (No votes)

See more:

I have 2 methods, one for inserting data and another for updating. These 2 methods have all arguments in common except that `update` method has an extra argument:

C#

if ()
    insert_data(arg1, arg2, arg3, arg4);
else
    update_data(ID, arg1, arg2, arg3 arg4);

I don't want to repeat `arg1` to `arg4`, so I have defined an `ArrayList`:

C#

var dataArrayList = new ArrayList()
{
    arg1,
    arg2,
    arg3,
    arg4
}

Is there anyway that can unzip the elements of this `ArrayList` like `*` character in Python?

C#

if ()
    insert_data(*dataArrayList);
else
    update_data(ID, *dataArrayList);

What I have tried:

I have searched through web questions, but the as solutions I should change my method definitions. I do not want to change method definitions.

Posted 28-Oct-20 3:12am

Ali Majed HA

Updated 28-Oct-20 3:28am

Add a Solution

2 solutions

Solution 2

Use a "parameter array".

params keyword for parameter arrays - C# reference | Microsoft Docs[^]

Posted 28-Oct-20 3:29am

Gerry Schmitz

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

Chris Copeland · Accepted Answer · 2020-10-28T03:24:00

Unfortunately there's no easy way to do this without diving into reflection. I would recommend either accessing the ArrayList directly to access each of the values, or a better alternative might be to just create an intermediary class holding all of the values?

C#

public class Data {
  public string Value1 { get; set; }
  public string Value2 { get; set; }
  public int Value3 { get; set; }
}

You can then pass an instance of that object into the methods and have access to all of the relevant fields:

C#

var data = new Data
{
  Value1 = ..,
  Value2 = ..
};

if (..)
  insert_data(data);
else
  update_data(ID, data);