System.Text.Json Deserialize empty strings to null[Answered] RSS

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  moris27

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  System.Text.Json Deserialize empty strings to null

  Oct 24, 2020 11:37 AM|moris27|LINK

  Hi

  using Blazor 3.2,is there any option not to convert empty strings to null on System.Text.Json Deserialize?

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  mgebhard

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  Re: System.Text.Json Deserialize empty strings to null

  Oct 24, 2020 12:32 PM|mgebhard|LINK

  moris27

  Hi

  using Blazor 3.2,is there any option not to convert empty strings to null on System.Text.Json Deserialize?

  Empty string are not converted to null.  Null is converted to null.

      public class JsonModel
      {
          public int Id { get; set; }
          public string Name { get; set; }
      }

          static async Task Main (string[] args)
          {
              JsonModel model = new JsonModel() { Id = 1, Name = "" };
              string json = JsonSerializer.Serialize(model);
              Console.WriteLine(json);
  
              model.Name = null;
              json = JsonSerializer.Serialize(model);
              Console.WriteLine(json);
          }

  Results

  {"Id":1,"Name":""}
  {"Id":1,"Name":null}

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  moris27

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  Re: System.Text.Json Deserialize empty strings to null

  Oct 24, 2020 01:28 PM|moris27|LINK

  indeed,only in debugger it is shown as null,but in Console.WriteLine it is ok

  thanks

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  mgebhard

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  Re: System.Text.Json Deserialize empty strings to null

  Oct 24, 2020 01:37 PM|mgebhard|LINK

  moris27

  indeed,only in debugger it is shown as null,but in Console.WriteLine it is ok

  Null and empty string are not the same types.  The serializer does NOT convert an empty string to null.  You must be missing something.  Share code that reproduces this issue so we can figure out what's going on.

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  moris27

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  Re: System.Text.Json Deserialize empty strings to null

  Oct 24, 2020 01:59 PM|moris27|LINK

  It's ok,only Blazor client-side debugging with Chrome shows null

  post can be deleted

  thanks