Does Anyone Know C#? What Is The Question Notation?

Discussion in 'Education & Personal Growth' started by SuiDhaaga, Jan 5, 2022.

  1. Jan 5, 2022 #1
    SuiDhaaga

    SuiDhaaga IL Hall of Fame

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    I am tracing code to study for a certification.

    Insee something like

    string requestBody = new StreamReader(req.body).ReadToEnd()
    Dynamic data = JsonConvert.DeserializeObject(requestBody)

    if (data?.values == null) …..

    what is the “?” In data?.values

    What should I even Google???
     
    SuiDhaaga, Jan 5, 2022
    SuiDhaaga, Jan 5, 2022
    #1
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  2. Jan 5, 2022 #2
    Gauri03

    Gauri03 Moderator Staff Member IL Hall of Fame

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    It's the Null-Conditional Operator. It is a way of pre-emptively testing for whether the object (data in this case) is null before accessing its values. Question marks can be used in a bunch of different ways in C#. See here - What does a question mark mean in C# code?
     
    Gauri03, Jan 5, 2022
    Gauri03, Jan 5, 2022
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    SuiDhaaga likes this.
  3. Jan 5, 2022 #3
    SuiDhaaga

    SuiDhaaga IL Hall of Fame

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    U r da best!!!!!!!
     
    SuiDhaaga, Jan 5, 2022
    SuiDhaaga, Jan 5, 2022
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