CODEWITHSUNDEEP
c#resharper
doorman
doorman

Reputation: 16959

Code generating props when newing object

I have an object with 100 properties. Is there a feature in Resharper or Visual Studio 2017 that generates the code for all the properties of the object. e.g.

var myObject = new ObjectWithMultipleProps
{
   Prop1 = "",
   Prop2 = 0,
   Prop3 = "",
   ...etch
}

I am creating unit tests and it would speed up things if this would be possible.

Upvotes: 0

Views: 73

Answers (2)

Wyck
Wyck

Reputation: 11760

type this much:

var myObject = new ObjectWithMultipleProps {

Then press Ctrl+J, Tab. The next unused field or Property will get auto completed for you. You can press Ctrl+J again and it will pop up the type of the field so you can choose an appropriate value. Or you can start typing new then press Ctrl+J and it will auto-complete the type for you.

Then type a comma, and repeat the process for each field. Fields that you have already specified will not appear in the list. If you do not want to set a value for a field, then omit it from the initializer list, and it will get its default value.

Upvotes: 1

MakePeaceGreatAgain
MakePeaceGreatAgain

Reputation: 37095

You seem to have a misunderstanding on what creating an instance means. There´s no way for an instantiated object (this is when you called new ...) to have no value for any of your members. All those members are initialized from the runtime to the default-type for the type of that member. In particular you can´t partly initialize your object, that is set only some members to an initial-value, whilst not setting others. Creating an instance is an all-or-nothing-operation.

So if you simply write this:

var myObject = new ObjectWithMultipleProps();

all properties within myObject will have their defualt-value. You can even print them:

Console.WriteLine(myObject.Prop2);  // this will print 0

You coul of course write all those assignments into the class´ constructor:

class ObjectWithMultipleProps
{
    public ObjectWithMultipleProps()
    {
        Prop1 = null;
        Prop2 = 0;
    }
}

This however has the exact same effect.

What may happen anyway is, that you get a NullReferenceException. This is because all reference-types default to null, making any call to those members yield to that exception, as shown in the following code:

var a = myObject.Prop1.SubsString(0, 1);

As Prop1 is initialized to null once the instance is completely created, you get a NullReferenceException, because you can´t call any member on null.

If you want other default-values for your members, you have to create the constructor and set the values there.

Upvotes: 0

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