update to net6.0

Author: dima_z

server-dotnetcore/Controllers/CubeController.cs

@@ -89,7 +89,7 @@ public async Task<IActionResult> PostFields([FromBody]FieldsRequest request)
  Response.StatusCode = 400;
  return new JsonResult("Incorrect request for this endpoint.");
  }
- return new JsonResult(response, new JsonSerializerOptions { IgnoreNullValues = true, PropertyNamingPolicy = JsonNamingPolicy.CamelCase, Converters = { new ColumnTypeJsonConverter() } });
+ return new JsonResult(response, new JsonSerializerOptions { DefaultIgnoreCondition = System.Text.Json.Serialization.JsonIgnoreCondition.WhenWritingNull, PropertyNamingPolicy = JsonNamingPolicy.CamelCase, Converters = { new ColumnTypeJsonConverter() } });
  }
 
  /// <summary>
@@ -286,7 +286,7 @@ private async Task<string> SelectData(string index, Query query, int page)
  DataSlice data = new DataSlice(rawData);
  SelectResponse response = new SelectResponse();
  string[] responses = null;
- JsonSerializerOptions options = new JsonSerializerOptions { IgnoreNullValues = true, PropertyNamingPolicy = JsonNamingPolicy.CamelCase, Converters = { new SelectResponseJsonConverter() } };
+ JsonSerializerOptions options = new JsonSerializerOptions { DefaultIgnoreCondition = System.Text.Json.Serialization.JsonIgnoreCondition.WhenWritingNull, PropertyNamingPolicy = JsonNamingPolicy.CamelCase, Converters = { new SelectResponseJsonConverter() } };
  if (query.Filter != null)
  {
  data.FilterData(query.Filter);

server-dotnetcore/NetCoreServer.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk.Web">
 
  <PropertyGroup>
- <TargetFramework>netcoreapp3.0</TargetFramework>
+ <TargetFramework>net6.0</TargetFramework>
  <Authors>Flexmonster</Authors>
  <Version>2.8.0</Version>
  <Description>Sample server that implement Flexmonster custom data source API.</Description>