absolution183 Posts - Answer Overflow

absolution183

•Created by absolution183 on 3/8/2023 in #help

❔ Using a Custom JSON Converter on NswagStudio's Generated C# Client

Does anyone know how I can make NswagStudio use a custom json converter that I made on the generated C# client?

public class CustomDateTimeOffsetConverter : DateTimeConverterBase
{
    public override object ReadJson(JsonReader reader, Type objectType, object? existingValue, JsonSerializer serializer)
    {
        DateTimeOffset? value = null;

        if (string.IsNullOrEmpty(reader.Value?.ToString())
            || !DateTimeOffset.TryParse(reader.Value?.ToString(), out DateTimeOffset output))
        {
            return value;
        }

        if (output < DateTimeOffset.MaxValue)
        {
            value = output;
        }

        return value;
    }

    public override void WriteJson(JsonWriter writer, object? value, JsonSerializer serializer)
    {
        if (string.IsNullOrEmpty(value?.ToString())
            || !DateTimeOffset.TryParse(value.ToString(), out DateTimeOffset output)
            || (DateTimeOffset.TryParse(value.ToString(), out output) && output == DateTimeOffset.MaxValue))
        {
            writer.WriteNull();
        }

        writer.WriteValue(value);
    }
}

public class CustomDateTimeOffsetConverter : DateTimeConverterBase
{
    public override object ReadJson(JsonReader reader, Type objectType, object? existingValue, JsonSerializer serializer)
    {
        DateTimeOffset? value = null;

        if (string.IsNullOrEmpty(reader.Value?.ToString())
            || !DateTimeOffset.TryParse(reader.Value?.ToString(), out DateTimeOffset output))
        {
            return value;
        }

        if (output < DateTimeOffset.MaxValue)
        {
            value = output;
        }

        return value;
    }

    public override void WriteJson(JsonWriter writer, object? value, JsonSerializer serializer)
    {
        if (string.IsNullOrEmpty(value?.ToString())
            || !DateTimeOffset.TryParse(value.ToString(), out DateTimeOffset output)
            || (DateTimeOffset.TryParse(value.ToString(), out output) && output == DateTimeOffset.MaxValue))
        {
            writer.WriteNull();
        }

        writer.WriteValue(value);
    }
}

4 replies

CC#

•Created by absolution183 on 1/20/2023 in #help

❔ Updating an entity/record with 1 query(?) on Entity Framework

My senior told me that there's a way to select and update something in EF in 1 query. So instead of this:

void MyMethod(int id)
{
    BundleRecord bundle = await databaseContext.Bundles.TagWithCallerName().SingleOrDefaultAsync(x => x.Id == id);
    bundle.ScanUploaded = true;

    await databaseContext.SaveChangesAsync();
}

void MyMethod(int id)
{
    BundleRecord bundle = await databaseContext.Bundles.TagWithCallerName().SingleOrDefaultAsync(x => x.Id == id);
    bundle.ScanUploaded = true;

    await databaseContext.SaveChangesAsync();
}

He said, if he remembers correctly, I should use the Attach() method. I've been Googling, and this is how I understood how to use this method:

void MyMethod(int id)
{
    BundleRecord newBundle = new()
    {
        Id = id,
        ScanUploaded = true // eliminates the "bundle.ScanUploaded = true;" line?
    };

    databaseContext.Bundles.Attach(newBundle).State = EntityState.Modified;

    await databaseContext.SaveChangesAsync();
}

void MyMethod(int id)
{
    BundleRecord newBundle = new()
    {
        Id = id,
        ScanUploaded = true // eliminates the "bundle.ScanUploaded = true;" line?
    };

    databaseContext.Bundles.Attach(newBundle).State = EntityState.Modified;

    await databaseContext.SaveChangesAsync();
}

Just wondering if my approach and understanding of the Attach() method are correct.

15 replies

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