【.net core】剔除JSON对象中值为null的字段

方法/// summary /// 递归剔除JObject中值为null的字段 /// /summary static void RemoveNullProperties(JToken token) { if (token.Type JTokenType.Object) { var jObj (JObject)token; var propertiesToRemove jObj.Properties() .Where(p p.Value null || p.Value.Type JTokenType.Null || string.IsNullOrEmpty((string)p.Value)|| (p.Value.Type JTokenType.String string.IsNullOrWhiteSpace((string)p.Value)) || (p.Value.Type JTokenType.Array !p.Value.HasValues)) .ToList(); foreach (var prop in propertiesToRemove) prop.Remove(); foreach (var child in jObj.Children()) { if (child.Children().Count() 0) { RemoveNullProperties(child); } } } else if (token.Type JTokenType.Property) { if (token.Children().Count() 0) { var childs token.Children().Where(p p null || p.Type JTokenType.Null || string.IsNullOrEmpty((string)p) || (p.Type JTokenType.String string.IsNullOrWhiteSpace((string)p)) || (p.Type JTokenType.Array !p.HasValues)) .ToList(); foreach (var prop in childs) prop.Remove(); foreach (var child in token.Children()) { if (child.Children().Count() 0) { RemoveNullProperties(child); } } } } else if (token.Type JTokenType.Array) { var jArray (JArray)token; // 清理数组内部的 null / for (int i jArray.Count - 1; i 0; i--) { var item jArray[i]; if (item.Type JTokenType.Null || (item.Type JTokenType.String string.IsNullOrWhiteSpace((string)item))) { jArray.RemoveAt(i); } } // 递归数组内对象/子数组 foreach (var child in jArray) RemoveNullProperties(child); // 如果数组最后变空也删除 if (!jArray.HasValues) { if (jArray.Parent is JProperty prop) prop.Remove(); } } }调用object reqHeader new { transTime 20260421171327, reqId 123456, test null }; JObject reqHeaderJobject JObject.FromObject(reqHeader); RemoveNullProperties(reqHeaderJobject); //剔除后reqHeaderJobject为{transTime:20260421171327,reqId:123456}