如何使用 linq 查询 C# 获取值

Question

如何使用 linq 查询或 lambda 表达式从 json 下面获取 authRoleCode= AHGENERAL 的值。在代码下方，我在此 json 下方提供了类结构。我试过这样。

var str = request.ApplicationsAccess.CategoryAccessType.Where(x=>x.), 

如何获取它的数据数据。

    "applicationsAccess": {
                            "categoryAccessType": [{
                                            "categoryCode": "Accident and Health",
                                            "basicApplications": {
                                                            "applictaionType": "basicApplications",
                                                            "roleAmpLabelAdded": [{
                                                                            "roleAMPLabel": "General access to marketing & resources",
                                                                            "authRoleCode": "AHGENERAL",
                                                                            "authRoleName": "A&H - General access to marketing & resources".

这是类结构，我们用于上面的json。

public partial class ApplicationsAccess
    {
        [JsonProperty("categoryAccessType")]
        public List<CategoryAccessTyp> CategoryAccessType { get; set; }
    }

    public partial class CategoryAccessTyp
    {
        [JsonProperty("categoryCode")]
        public string CategoryCode { get; set; }

        [JsonProperty("applicationTypes")]
        public List<ApplicationType> ApplicationTypes { get; set; }
    }

    public partial class ApplicationType
    {
        [JsonProperty("applictaionType")]
        public string ApplictaionType { get; set; }
       
        public List<RoleAmpLabelAdded> RoleAmpLabelAdded { get; set; }
        
        public ApplicationsAdded ApplicationsAdded { get; set; }
    }

    public partial class ApplicationsAdded
    {
        [JsonProperty("applications")]
        public List<Applications> Applications { get; set; }
    }

    

    public partial class RoleAmpLabelAdded
    {
        [JsonProperty("roleAMPLabel")]
        public string RoleAmpLabel { get; set; }

        [JsonProperty("authRoleCode")]
        public string AuthRoleCode { get; set; }

        [JsonProperty("authRoleName")]
        public string AuthRoleName { get; set; }

        [JsonProperty("applications")]
        public List<Applications> Applications { get; set; }
    }
    public partial class Applications
    {
        [JsonProperty("appId")]

        public long AppId { get; set; }

        [JsonProperty("appCode")]
        public long AppCode { get; set; }

        [JsonProperty("appName")]
        public string AppName { get; set; }
    }

如果您需要更多信息，请告诉我们 TIA。

Answer 1

如果您需要AuthRoleCode 属性等于"AHGENERAL" 的RoleAmpLabelAdded 类的对象，那么您可以尝试以下代码：

 IEnumerable<RoleAmpLabelAdded> result = request
            .ApplicationAccess
            .CategoryAccessType
            .SelectMany(c => c.ApplicationTypes.SelectMany(t => t.RoleAmpLabelAdded))
            .Where(r => r.AuthRoleCode == "AHGENERAL");

获取所有AuthRoleCode-s：

       IEnumerable<string> result = request
            .ApplicationAccess
            .CategoryAccessType
            .SelectMany(c => c.ApplicationTypes.SelectMany(t => t.RoleAmpLabelAdded))
            .Select(r => r.AuthRoleCode);