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custom response object for model validation in asp.net core

I want custom object in response of API having [required] data annotation on model properties like this:
{
"resourceType": "OperationOutcome",
"issue": [
{
"severity": "fatal",
"code": "required",
"location": [
"/f:AllergyIntolerance/f:status"
]
}
]
}
Is it possible to do it or I would have to code it.
Because model validation happens before action is called, is there any way I can do it?

To create custom request and respond samples for your api, you can use Swashbuckle.AspNetCore.Swagger and to improve validations on your models you can use FluentValidations Sample. Good Luck!

first for simplify define your models like these :
public class ResponseModel
{
public string resourceType { get; set; }
public List<ResponseIssueModel> issue { get; set; } = new List<ResponseIssueModel>();
}
public class ResponseIssueModel
{
public string severity { get; set; }
public string code { get; set; }
public List<string> locations { get; set; } = new List<string>();
}
Then on your actions you can return this :
var response = new ResponseModel();
response.resourceType = "OperationOutcome";
response.issue.Add(new ResponseIssueModel
{
severity = "fatal",
code = "required",
locations = { "/f:AllergyIntolerance/f:status" }
});
return Ok(response);
you can use Builder Pattern for easy create response object

If you want to validate your model in controller,you could try with TryValidateModel method as mentioned in the document:
I tried as below:
in controller:
var model = new TestModel() { Id=1,nestedModels=new List<NestedModel>() { new NestedModel() { Prop1="P11"} } };
var isvalid=TryValidateModel(model);
var errorfiledlist = new List<string>();
if (!isvalid)
{
foreach (var value in ModelState.Values)
{
foreach (var error in value.Errors)
{
errorfiledlist.Add(MidStrEx(error.ErrorMessage,"The "," field"));
}
}
}
var jsonstring = JsonSerializer.Serialize(model);
foreach (var field in errorfiledlist)
{
var oldstr = String.Format("\"{0}\":null", field);
var newstr = String.Format("\"{0}\":\"required\"", field);
jsonstring = jsonstring.Replace(oldstr, newstr);
};
var obj = JsonSerializer.Deserialize<Object>(jsonstring);
return Ok(obj);
MidStrEx method:
public static string MidStrEx(string sourse, string startstr, string endstr)
{
string result = string.Empty;
int startindex, endindex;
try
{
startindex = sourse.IndexOf(startstr);
if (startindex == -1)
return result;
string tmpstr = sourse.Substring(startindex + startstr.Length);
endindex = tmpstr.IndexOf(endstr);
if (endindex == -1)
return result;
result = tmpstr.Remove(endindex);
}
catch (Exception ex)
{
}
return result;
}
Models：
public class TestModel
{
public int Id { get; set; }
[Required]
public string Prop { get; set; }
public List<NestedModel> nestedModels { get; set; }=new List<NestedModel>();
}
public class NestedModel
{
public string Prop1 { get; set; }
[Required]
public string Prop2 { get; set; }
}
The result：

Tree hierarchy setting flag true if child exists C#

I am trying to set issetting flag to true , if child exists for a
parent.
//Class file
public class EopsModule
{
public int ID { get; set; }
public string ModuleCode { get; set; }
public string Description { get; set; }
public bool IsDefaultModule { get; set; }
public int? ParentID { get; set; }
public bool IsSetting { get; set; }
public List<EopsModule> Children { get; set; }
}
public IResponseResult GetApplicationSettingWithModule()
{
IResponseResult responseResult = new ResponseResult();
dynamic dynamic = new ExpandoObject();
try
{
var settingsDetails = _databaseManager.GetMultipleDataByJson(DatabaseStoredProcedures.spGetAllApplicationSetting.ToString()).Result;
var oObjectDeserializeObject = Newtonsoft.Json.JsonConvert.DeserializeObject<dynamic>(settingsDetails);
//get here all EopsModule in List<EopsModule>
var moduleTreeHierarchy = _eopsModuleManager.GetAllEopsModuleWithHierarchy().Result;
dynamic.settingsDetails = oObjectDeserializeObject;
dynamic.moduleTreeHierarchy = moduleTreeHierarchy;
string oModuleCode = string.Empty;
foreach (var item in oObjectDeserializeObject)
{
oModuleCode = item.moduleCode;
moduleTreeHierarchy.
Where(x => x.ModuleCode == oModuleCode).ToList().ForEach(x =>
{
x.IsSetting = true;
});
}
responseResult = Helper.Response.ResponseModel(dynamic, true, Helper.Constants.ApiSuccess, HttpStatusCode.OK, true);
}
catch (Exception)
{
responseResult = Helper.Response.ResponseModel(null, false, Helper.Constants.ApiFailure, HttpStatusCode.BadRequest, true);
}
return responseResult;
}
The loop i am iterating is working for parent level but , its not updating the value for child values,
wondering if it can be achieved by recursive function.
Please find the output with existing code :

Have you tried something like this? I did not pass it through compiler but you'll get the idea.
public UpdateModuleAndChildren(Module moduleTreeHierarchy) {
if(moduleTreeHierarchy.children != null && moduleTreeHierarchy.children.Count() > 0) {
moduleTreeHierarchy.children.forEach(x => { this.UpdateModuleAndChildren(x) });
module.IsSetting = true;
}
}
Let me know if it helps.
In your code you will just call this.UpdateModuleAndChildren(moduleTreeHierarchy)

Dropdown has a SelectedValue which is invalid because it does not exist in the list of items, even though I cleared the selected items (C#)

I'm getting this error on DataBind(), and I don't know why since there shouldn't be anything selected.
DdState.Items.Clear();
DdState.DataSource = UsStates;
DdState.DataTextField = "Title";
DdState.DataValueField = "Title";
DdState.Items.Insert(0, String.Empty);
if (DdState.SelectedItem != null)
{
DdState.SelectedItem.Selected = false;
}
DdState.DataBind();
private IEnumerable<IStateItem> UsStates
{
get
{
var statesFolder = _sitecoreService.GetItem<ISitecoreItem>(ItemReference.BcsUs_ProductData_States.Guid);
if (statesFolder == null)
return new List<IStateItem>();
List<IStateItem> usStates = _sitecoreService.QueryChildren<IStateItem>(statesFolder).OrderBy(s => s.Title).ToList();
return usStates;
}
}
I tried putting in DdState.SelectedIndex = 0 before the DataBind(), but then I got an error that the selected index did not exist. What's going on?

If the DataSource is a list its much easier to implement. So just "convert" the UsStates IEnumerable to a List an then add it to the data source.
DdState.DataSource = UsStates.ToList();
Then choose the property of a list item as binding.
OR
public Form1()
{
InitializeComponent();
DdState.Items.Clear();
DdState.DataSource = UsStates;
DdState.DisplayMember = "Statename";
DdState.SelectedIndex = 0;
}
private List<IStateItem> UsStates
{
get
{
List<IStateItem> usStates = new List<IStateItem>();
usStates.Add(new IStateItem("California","status1"));
usStates.Add(new IStateItem("Ohio", "status3"));
return usStates;
}
}
private class IStateItem
{
public IStateItem(string statename, string stateStatus)
{
Statename = statename;
StateStatus = stateStatus;
}
public string Statename { get; set; }
public string StateStatus { get; set; }
}

Could there be something wrong with your IStateItem class?
I copy/pasted your code in a new asp.net application, made my own IStateItem class and it works.
using System;
using System.Collections.Generic;
namespace TestIt
{
public partial class Form1 : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
FillTheList();
}
private void FillTheList()
{
ddl_TheList.Items.Clear();
ddl_TheList.DataSource = UsStates;
ddl_TheList.DataTextField = "statename";
ddl_TheList.DataValueField = "stateStatus";
//ddl_TheList.Items.Insert(0, String.Empty);
ddl_TheList.DataBind();
ddl_TheList.SelectedIndex = 0;
}
private IEnumerable<IStateItem> UsStates
{
get
{
List<IStateItem> usStates = new List<IStateItem>();
for (int i = 0; i < 10; i++)
{
usStates.Add(new IStateItem { statename = "state #" + i, stateStatus = "cool state bro" });
}
return usStates;
}
}
}
public class IStateItem
{
public string statename { get; set; }
public string stateStatus { get; set; }
}
}

Binding to New Member Display; BuildComboList

I am trying to build a combo list for a program to fill the combobox with a list of applications. it keeps throwing up "Cannot bind to the new display member. Parameter name: newDisplayMember"
private void BuildComboList()
{
Applicant defaultApplicant = new Applicant();
applicationList = defaultApplicant.GetList();
applicantList.DataSource = applicationList;
applicantList.DisplayMember = "DisplayName";
applicantList.ValueMember = "DisplayValue";
}
Applicant Class
public class Applicant
{
//Members
private int applicant_ID;
private string applicant_fname;
private string applicant_lname;
private string applicant_phone;
private string applicant_address1;
private string applicant_address2;
private string applicant_city;
private string applicant_state;
private string applicant_zip;
private string applicant_email;
//properties
public int Applicant_ID
{
get { return applicant_ID; }
set { applicant_ID = value; }
}
public string Applicant_fname
{
get { return applicant_fname; }
set { applicant_fname = value; }
}
public string Applicant_lname
{
get { return applicant_lname; }
set { applicant_lname = value; }
}
public string Applicant_phone
{
get { return applicant_phone; }
set { applicant_phone = value; }
}
public string Applicant_address1
{
get { return applicant_address1; }
set { applicant_address1 = value; }
}
public string Applicant_address2
{
get { return applicant_address2; }
set { applicant_address2 = value; }
}
public string Applicant_city
{
get { return applicant_city; }
set { applicant_city = value; }
}
public string Applicant_state
{
get { return applicant_state; }
set { applicant_state = value; }
}
public string Applicant_zip
{
get { return applicant_zip; }
set { applicant_zip = value; }
}
public string Applicant_email
{
get { return applicant_email; }
set { applicant_email = value; }
}
//Constructors
private void DefaultValues()
{
applicant_ID = 0;
applicant_fname = "";
applicant_lname = "";
applicant_phone = "";
applicant_address1 = "";
applicant_address2 = "";
applicant_city = "";
applicant_state = "";
applicant_zip = "";
applicant_email = "";
}
private void Rec2Members(ApplicantRecord record)//defined in ApplicantDL
{
applicant_ID = record.applicant_ID;
applicant_fname = record.applicant_fname;
applicant_lname = record.applicant_lname;
applicant_phone = record.applicant_phone;
applicant_address1 = record.applicant_address1;
applicant_address2 = record.applicant_address2;
applicant_city = record.applicant_city;
applicant_state = record.applicant_state;
applicant_zip = record.applicant_zip;
applicant_email = record.applicant_email;
}
public ApplicantRecord ToRecord()
{
ApplicantRecord record = new ApplicantRecord();
record.applicant_ID = applicant_ID;
record.applicant_fname = applicant_fname;
record.applicant_lname = applicant_lname;
record.applicant_phone = applicant_phone;
record.applicant_address1 = applicant_address1;
record.applicant_address2 = applicant_address2;
record.applicant_city = applicant_city;
record.applicant_state = applicant_state;
record.applicant_zip = applicant_zip;
record.applicant_email = applicant_email;
return record;
}
public List<ApplicantRecord> GetList()
{
return Approval_Form.ApplicantRecord.ApplicantDL.GetList();
}
public void Insert()
{
applicant_ID = Approval_Form.ApplicantRecord.ApplicantDL.Insert(applicant_fname, applicant_lname, applicant_phone, applicant_address1, applicant_address2, applicant_city, applicant_state, applicant_zip, applicant_email);
}
public void Select(int applicant_ID)
{
ApplicantRecord record = Approval_Form.ApplicantRecord.ApplicantDL.Select(applicant_ID);
Rec2Members(record);
}
public void Update()
{
if (applicant_ID != 0)
{
Approval_Form.ApplicantRecord.ApplicantDL.Update(applicant_ID, applicant_fname, applicant_lname, applicant_phone, applicant_address1, applicant_address2, applicant_city, applicant_state, applicant_zip, applicant_email);
}
}
}

I think it should be:
private void BuildComboList()
{
Applicant defaultApplicant = new Applicant();
applicationList = defaultApplicant.GetList();
applicantList.DataSource = applicationList;
applicantList.DisplayMember = "Applicant_fname";
applicantList.ValueMember = "Applicant_ID";
}
You can change the applicant class further as follows:
Add two properties.
public string DisplayName
{
get { return (applicant_fname + " " + applicant_lname; }
}
public string DisplayValue
{
get { return (applicant_ID.ToString(); }
}
Keep data binding as:
private void BuildComboList()
{
Applicant defaultApplicant = new Applicant();
applicationList = defaultApplicant.GetList();
applicantList.DataSource = applicationList;
applicantList.DisplayMember = "DisplayName";
applicantList.ValueMember = "DisplayValue";
}

Statement is not updating data item

I have this LINQ statement that tries to set the 1st element in the collection of string[]. But it doesn't work.
Below is the LINQ statement.
docSpcItem.Where(x => x.DocID == 2146943)
.FirstOrDefault()
.FinishingOptionsDesc[0] = "new value";
public string[] FinishingOptionsDesc
{
get
{
if (this._FinishingOptionsDesc != null)
{
return (string[])this._FinishingOptionsDesc.ToArray(typeof(string));
}
return null;
}
set { this._FinishingOptionsDesc = new ArrayList(value); }
}
What's wrong with my LINQ statement above?

Couple of things.. There are some problems with your get and set. I would just use auto properties like this..
public class DocSpcItem
{
public string[] FinishingOptionsDesc { get; set; }
public int DocID { get; set; }
}
Next for your linq statement, depending on the presence of an item with an id of 2146943 you might be setting a new version of the object rather than the one you intended. This should work..
[TestMethod]
public void Linq()
{
var items = new List<DocSpcItem>();
//2146943
for (var i = 2146930; i <= 2146950; i++)
{
items.Add(new DocSpcItem()
{ DocID = i
, FinishingOptionsDesc = new string[]
{ i.ToString() }
}
);
}
var item = items.FirstOrDefault(i => i.DocID == 2146943);
if (item != null)
{
item.FinishingOptionsDesc = new string[]{"The New Value"};
}
}
and
public class DocSpcItem
{
public string[] FinishingOptionsDesc { get; set; }
public int DocID { get; set; }
}