c# - 如何在运行时将属性添加到 JSON (C#)
问题描述
注意:我正在使用 System.Text.Json 包下面是我从数据库中获取的 JSON。我必须遍历 JSON 中的每个键,并检查键名中是否有句点 ( .
);如果是这样,我需要在 JSON 中添加一个required
值为 的属性,true
以提供运行时验证:
validate:{"required", true}
这是我的 JSON:
{
"display": "wizard",
"settings": {},
"components": [{
"title": "Event Information",
"label": "Event Information",
"type": "panel",
"key": "EventInformation",
"components": [{
"label": "Row1Columns",
"columns": [{
"components": [{
"label": "Event Date",
"format": "dd/MM/yyyy hh:mm a",
"tableView": false,
"datePicker": {
"disableWeekends": false,
"disableWeekdays": false
},
"validate": {
"unique": true
},
"key": "Event.EventDate",
"type": "datetime",
"input": true,
"suffix": "<i ref=\"icon\" class=\"fa fa-calendar\" style=\"\"></i>",
"widget": {
"type": "calendar",
"displayInTimezone": "viewer",
"language": "en",
"useLocaleSettings": false,
"allowInput": true,
"mode": "single",
"enableTime": true,
"noCalendar": false,
"format": "dd/MM/yyyy hh:mm a",
"hourIncrement": 1,
"minuteIncrement": 1,
"time_24hr": false,
"minDate": null,
"disableWeekends": false,
"disableWeekdays": false,
"maxDate": null
}
}],
"width": 6,
"offset": 0,
"push": 0,
"pull": 0
}, {
"components": [{
"label": "Duration (minutes)",
"mask": false,
"spellcheck": true,
"tableView": false,
"delimiter": false,
"requireDecimal": false,
"inputFormat": "plain",
"key": "Event.Duration",
"type": "number",
"input": true
}],
"width": 6,
"offset": 0,
"push": 0,
"pull": 0
}],
"tableView": false,
"key": "row1Columns",
"type": "columns",
"input": false
}, {
"label": "Row2Columns",
"columns": [{
"components": [{
"label": "Event Category",
"widget": "choicesjs",
"tableView": true,
"dataSrc": "custom",
"data": {
"custom": "values = getEventCategoryValues()"
},
"valueProperty": "AgencyEventCategoryId",
"template": "<span>{{ item.text }}</span>",
"selectThreshold": 0.3,
"validate": {
"required": true
},
"key": "Event.AgencyEventCategoryId",
"type": "select",
"indexeddb": {
"filter": {}
},
"input": true
}],
"width": 6,
"offset": 0,
"push": 0,
"pull": 0
}, {
"components": [{
"label": "Attendance",
"widget": "choicesjs",
"tableView": true,
"multiple": false,
"dataSrc": "custom",
"data": {
"custom": "values = getAttendanceValues()"
},
"valueProperty": "AgencyEventAttendanceId",
"template": "<span>{{ item.text }}</span>",
"selectThreshold": 0.3,
"validate": {
"required": true,
},
"key": "Event.AgencyEventAttendanceId",
"type": "select",
"indexeddb": {
"filter": {}
},
"input": true
}],
"width": 6,
"offset": 0,
"push": 0,
"pull": 0
}],
"tableView": false,
"key": "row2Columns",
"type": "columns",
"input": false
}, {
"label": "Event Options",
"widget": "choicesjs",
"tableView": true,
"multiple": true,
"dataSrc": "custom",
"data": {
"custom": "values = getEventManagerValues(data.Event.AgencyEventCategoryId)"
},
"template": "<span>{{ item.text }}</span>",
"refreshOn": "Event.AgencyEventCategoryId",
"clearOnRefresh": true,
"selectThreshold": 0.3,
"calculateServer": false,
"validate": {
"required": true,
"multiple": true
},
"key": "Event.EventDetail",
"type": "select",
"indexeddb": {
"filter": {}
},
"input": true
}, {
"label": "Casenote",
"wysiwyg": true,
"autoExpand": true,
"spellcheck": true,
"tableView": true,
"calculateServer": false,
"key": "Event.EventCasenote[0].Casenote",
"type": "textarea",
"input": true
}],
"input": false,
"tableView": false,
"breadcrumbClickable": true,
"buttonSettings": {
"previous": true,
"cancel": true,
"next": true
},
"collapsible": false
}]
}
解决方案
一种选择是将 json 解析为JObject
并通过 Newtonsoft 的 Json.NET 向其添加属性:
var obj = JObject.Parse("{'key':'value'}");
obj.Add("required", true);
Console.WriteLine(obj); // { "key": "value", "required": true }
要添加新对象,您可以使用以下重载Add
:
obj.Add("validate", JObject.FromObject(new { required = true }));
所以整个解决方案看起来像这样:
var obj = JObect.Parse(your_json);
foreach(var token in obj.DescendantsAndSelf().ToList()) // ToList is important!!!
{
if(token is JObject xObj)
{
// check your conditions for adding property
// check if object does not have "validate" property
if(satisfies_all_conditions)
{
xObj.Add("validate", JObject.FromObject(new { required = true }));
}
}
}
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