Dynamic variables in objects

Question

Lets say that I have a string that is mostly complete. In the middle of it is an entry that is variable - for example:

string speech = @"I am very"variable"and I need some lighter clothes"

Assuming I don't want to create another string to handle that last part of that sentence, how do I place one of many words for "hot" in place of variable?

My pseudo theory would go something like this:

string speech = @"I am very " + &antonym + " and I need some lighter clothes";
public string putTheSentenceTogether(string antonym)
{
    return speech(antonym);
}

Can this be done in C#? Or an any other way that doesn't require me to split speech up?

Have you tried it? There are many ways to concatenate a string in c#. — Derrick Moeller
– Derrick Moeller, Commented Mar 10, 2017 at 18:04

Peter Smith · Accepted Answer · 2017-03-10 18:08:41Z

4

Using C# 6.0 or later, try:

string myAntonym = "hot";
string speech = $"I am very {myAntonym} and I need some lighter clothes";

edited Mar 10, 2017 at 18:08

answered Mar 10, 2017 at 18:05

Peter Smith

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1 Comment

Wolfish Over a year ago

Although all of these examples work, this is the cleanest and shortest, I think, therefore I'm selecting it as the most appropriate answer.

Nikhil Agrawal · Accepted Answer · 2017-03-10 18:13:01Z

4

How about you do

string speech = @"I am very {0} and I need some lighter clothes";
public string PutTheSentenceTogether(string antonym)
{
    return string.Format(speech, antonym);
}

Or you can do (in C# 6.0 i.e. VS 2015 and later)

public string PutTheSentenceTogether(string antonym)
{
    return $"I am very {antonym} and I need some lighter clothes";
}

edited Mar 10, 2017 at 18:13

answered Mar 10, 2017 at 18:04

Nikhil Agrawal

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Comments

dst3p · Accepted Answer · 2017-03-10 18:11:36Z

2

This will work using string interpolation:

public string putTheSentenceTogether(string antonym)
{
    return $"I am very {antonym} and I need some lighter clothes";
}

Or using string.Format

public string putTheSentenceTogether(string antonym)
{
    return string.Format("I am very {0} and I need some lighter clothes", antonym);
}

Provided you want to declare the string outside of the method, you could do

string speech = "I am very {0} and I need some lighter clothes";

public string putTheSentenceTogether(string antonym)
{
    return string.Format(speech, antonym);
}

edited Mar 10, 2017 at 18:11

answered Mar 10, 2017 at 18:07

dst3p

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1 Comment

Brandon Kramer Over a year ago

Interpolation in the first example needs to have a '$' symbol in place of the '@' symbol.

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