c# – JArray.Contains问题
发布时间:2020-12-16 02:01:24 所属栏目:百科 来源:网络整理
导读:我有一个JArray,从文件中读取: private void RemoveCatalog(Catalog catalog) { System.IO.StreamReader filereader = new System.IO.StreamReader(@appDirectory + "list"); JArray myjarray = JArray.Parse(filereader.ReadToEnd()); filereader.Close(
我有一个JArray,从文件中读取:
private void RemoveCatalog(Catalog catalog) { System.IO.StreamReader filereader = new System.IO.StreamReader(@appDirectory + "list"); JArray myjarray = JArray.Parse(filereader.ReadToEnd()); filereader.Close(); string json = " {"token":"" + catalog.Token + "","name":"" + catalog.Name +"","logo":"" + catalog.Logo + "","theme":"" + catalog.Theme + ""}"; JObject myCatalogAsJObject = JObject.Parse(json); myjarray.Remove(myCatalogAsJObject); } 我想删除与myCatalogAsJObject变量对应的JObject,但它不起作用,因为myjarray.Contains(myCatalogAsJObject)的答案是false. 问题是myjarray实际上包含它:它是我JArray中唯一的JObject. 如果我执行myCatalogAsJObject.ToString().Equals(myjarray.First.ToString()),答案是正确的. 我被卡住了. 解决方法
.Contains(和.Remove)默认会比较引用.由于您正在创建新的JObject,因此该数组不包含该实例.
您可以从数组中获取对象的实例并删除它: JObject match = myjarray.FirstOrDefault(j => j.token == catalog.token && j.name == catalog.name && j.logo == catalog.logo && j.theme == catalog.theme); myjarray.Remove(match); 编辑:这是您的代码,简化: JToken match = myjarray.FirstOrDefault(j => j.ToString().Equals(myCatalogAsJObject.ToString())); myjarray.Remove(match); (编辑:李大同) 【声明】本站内容均来自网络,其相关言论仅代表作者个人观点,不代表本站立场。若无意侵犯到您的权利,请及时与联系站长删除相关内容! |