I am currently struggling to accept a list of objects from FormData in ASP.NET Core.
The project looks like this:
I have a class called Stavka (English: Item).
public class Stavka
{
public string naziv { get; set; }
public double cenaPoJedinici { get; set; }
public string jedinicaMere { get; set; }
public int kolicina { get; set; }
public Stavka(string naziv, double cenaPoJedinici, string jedinicaMere, int kolicina)
{
this.naziv = naziv;
this.cenaPoJedinici = cenaPoJedinici;
this.jedinicaMere = jedinicaMere;
this.kolicina = kolicina;
}
public Stavka()
{
}
}
I have a class called Faktura (English: Bill) which has a variable called Stavke (English: Items) that is a list containing the Stavka objects.
public class Faktura
{
public int Id { get; set; }
public string pibStart { get; set; }
public string pibEnd { get; set; }
public DateTime datumGen { get; set; }
public DateTime datumRok { get; set; }
public List<Stavka> stavke { get; set;}
public double cena { get; set; }
public string tip { get; set; }
public Faktura(int id, string pibStart, string pibEnd, DateTime datumGen, DateTime datumRok, List<Stavka> stavke, string tip)
{
Id = id;
this.pibStart = pibStart;
this.pibEnd = pibEnd;
this.datumGen = datumGen;
this.datumRok = datumRok;
this.stavke = stavke;
this.tip = tip;
double sumCena = 0;
foreach(Stavka s in stavke)
{
sumCena += s.kolicina * s.cenaPoJedinici;
}
this.cena = sumCena;
}
public Faktura()
{
}
I want to create a new Faktura object and add it to a list within my Controller. I tried to do this with the following code:
[HttpPost("dodajFakturu")]
public IActionResult dodajFakturu([FromForm]string pibStart, [FromForm]string pibEnd,[FromForm]DateTime datumStart, [FromForm]DateTime datumEnd,[FromForm]List<Stavka> stavkeLis, [FromForm]string tip)
{
int id = lst.OrderByDescending(p => p.Id).First().Id + 1;
Faktura f = new Faktura(id, pibStart,pibEnd, datumStart,datumEnd,stavkeLis,tip);
lst.Add(f);
return Ok(SveFakture());
}
And yet, when i post the request (in Swagger/Postman), the variable stavkeLis (which accepts the JSON array) is always empty:
This is certainly because i fundamentally misunderstood the way in which NET Core accepts these variables.
Is there some other way to send a list of objects through form data?
this way you have is currect, but if its not maybe because simple code problem but way that you right the code can be better or you can say develop your code as Below:
// StavkaBody => I Mean All Body In One Json
public async Task<IActionResult> MethodName([FromForm] string
StavkaBody)
{
YourObjectType object = new YourObjectType();
// this will be Populate All Json To Single object And
// You dont Need To Add some Constructors For Done this
JsonConvert.PopulateObject(StavkaBody, objec);
// Example Usage
Console.WriteLine(object.Name);
}
in Here I`ve Used The Newtonsoft.Json For this And Its Make Your Model So Much Simpler.
I Hope Its Helps
I have three classes:
public class M2ArticleMain
{
public int Id { get; set; }
public List<M2ArticleAttributeWeb> Attribut_Web { get; set; }
}
public class M2ArticleAttributeWeb
{
public int Web_Id { get; set; }
public M2ArticleTmpMainSkus Variants { get; set; }
}
public class M2ArticleTmpMainSkus
{
public DateTime TimeAdded { get; set; }
public List<string> Skus { get; set; }
}
And I have two Lists in my code like this:
List<M2ArticleMain> data = new List<M2ArticleMain>();
List<M2ArticleAttributeWeb> attb = new List<M2ArticleAttributeWeb>();
In some part of my code firstly I (from foreach loop) add data to attb list where I add only only some data (because I don't have all data at this point), like this:
...
attb.Add(new M2ArticleAttributeWeb
{
Web_id = item.Id, //(item is from foreach loop)
Variants = null //this is **importat**, I left null for later to add it
});
Next, after I fill attb, I add all this to data list:
...
data.Add(new M2ArticleMain
{
Id = item.Id_Pk, //this is also from foreach loop,
Attribut_Web = attb //now in this part I have only data for Web_id and not Variants
}
Now my question is How to Add items later to data list to object Variants?
Something like this:
data.AddRange( "how to point to Variants" = some data);
The M2ArticleAttributeWeb type holding your Variants property is the member of a collection. That is, there are potentially many of them. You can reference an individual Variants property like this:
data[0].Attribut_Web[0].Variants
But you need to know which items you want to add map to which data and Attribut_Web indexes/objects in order to assign them properly. That probably means another loop, or even a nested loop. That is, you can see all of your Variants properties in a loop like this:
foreach(var main in data)
{
foreach(var attrw in main)
{
var v = attrw.Variants;
// do something with v
Console.WriteLine(v);
// **OR**
attrw.Variants = // assign some object
}
}
It's also much better practice to create your collection properties with the object, and then give them private set attributes:
public class M2ArticleMain
{
public int Id { get; set; }
public List<M2ArticleAttributeWeb> Attribut_Web { get; private set; } = new List<M2ArticleAttributeWeb>();
}
public class M2ArticleAttributeWeb
{
public int Web_Id { get; set; }
public M2ArticleTmpMainSkus Variants { get; set; }
}
public class M2ArticleTmpMainSkus
{
public DateTime TimeAdded { get; set; }
public List<string> Skus { get; private set; } = new List<string>();
}
Now instead of assigning Attribut_Web = attb, you would need to .Add() to the existing List.
The JSON data is as follows：
{"Sucess":true,
"Code":0,
"Msg":"Sucess",
"Data":{
"UserDayRanking":
{
"UserID":11452112,
"UserCharm":0,
"UserName":"gay",
"UserGender":1,
"UserLevel":36,
"UserPhoto":"http://res.xxx.com/2020/3/16/63719926625601201487545U11452112.jpeg",
"Ranking":0,
"IsNobility":0,
"NobilityType":0,
"NobilityLevel":0,
"UserShowStyle":null,
"LiveLevelUrl":null,
"IsStealth":false},
"DayRankingList":[
{
"UserID":3974854,
"UserCharm":114858,
"UserName":"jack",
"UserGender":1,
"UserLevel":91,
"UserPhoto":"http://res.xxx.com/2020/2/15/63717400601924412312384U3974854.jpeg",
"Ranking":2,
"IsNobility":1,
"NobilityType":1,
"NobilityLevel":3,
"UserShowStyle":
{
"NameColor":100102,
"BorderColor":100403,
"LiangMedal":0,
"DztCountDown":0,
"Mounts":100204,
"LiveLevelCode":0,
"LiveRights":null
},
"LiveLevelUrl":null,
"IsStealth":false
},
{"UserID":6231512,
"UserCharm":22644,
"UserName":"red.girl",
"UserGender":1,
"UserLevel":57,
"UserPhoto":"http://res.xxx.com/2019/11/20/63709843050801519858823U6231512.jpeg",
"Ranking":3,
"IsNobility":0,
"NobilityType":0,
"NobilityLevel":0,
"UserShowStyle":{
"NameColor":0,
"BorderColor":0,
"LiangMedal":0,
"DztCountDown":0,
"Mounts":0,
"LiveLevelCode":0,
"LiveRights":null
},
"LiveLevelUrl":null,
"IsStealth":false}
],
"LiveCharmSwitch":1,
"IsSelf":false
}
}
I want to use c # extraction
"UserID": 3974854,
"UserCharm": 114858,
"UserName": "jack",
"UserID":6231512,
"UserCharm":22644,
"UserName":"red.girl",
That is to extract UserID, UserCharm, UserName，This json has many layers,
What I want after the extraction is，id is sorted in order
id = 1, UserID = 3974854, UserCharm = 114858, UserName = jack
id = 2, UserID = 6231512, UserCharm = 22644, UserName = red.girl
I use the following code, but only extract the first one
string json = #"{"Sucess":true,"Code":0,"Msg":"Sucess","Data":{"UserDayRanking":{"UserID":11452112,"UserCharm":0,"UserName":"gay","UserGender":1,"UserLevel":36,"UserPhoto":"http://res.xxx.com/2020/3/16/63719926625601201487545U11452112.jpeg","Ranking":0,"IsNobility":0,"NobilityType":0,"NobilityLevel":0,"UserShowStyle":null,"LiveLevelUrl":null,"IsStealth":false},"DayRankingList":[{"UserID":3974854,"UserCharm":114858,"UserName":"jack","UserGender":1,"UserLevel":91,"UserPhoto":"http://res.xxx.com/2020/2/15/63717400601924412312384U3974854.jpeg","Ranking":2,"IsNobility":1,"NobilityType":1,"NobilityLevel":3,"UserShowStyle":{"NameColor":100102,"BorderColor":100403,"LiangMedal":0,"DztCountDown":0,"Mounts":100204,"LiveLevelCode":0,"LiveRights":null},"LiveLevelUrl":null,"IsStealth":false},{"UserID":6231512,"UserCharm":22644,"UserName":"red.girl","UserGender":1,"UserLevel":57,"UserPhoto":"http://res.xxx.com/2019/11/20/63709843050801519858823U6231512.jpeg","Ranking":3,"IsNobility":0,"NobilityType":0,"NobilityLevel":0,"UserShowStyle":{"NameColor":0,"BorderColor":0,"LiangMedal":0,"DztCountDown":0,"Mounts":0,"LiveLevelCode":0,"LiveRights":null},"LiveLevelUrl":null,"IsStealth":false}],"LiveCharmSwitch":1,"IsSelf":false}}";
List<Info> jobInfoList = JsonConvert.DeserializeObject<List<Info>>(z);
foreach (Info jobInfo in jobInfoList)
{
//Console.WriteLine("UserName:" + jobInfo.UserName);
}
public class Info
{
public string UserCharm { get; set; }
public string UserName { get; set; }
public data DayRankingList { get; set; }
}
public class data
{
public int UserID { get; set; }
public string UserCharm { get; set; }
public string UserName { get; set; }
public string UserGender { get; set; }
public string UserLevel { get; set; }
}
The above code only shows username = jack，Never show username = red.girl
As it looks to me then you want some details from your JSON has the which is in DayRankingList. As you only want some data then we can use a tool like http://json2csharp.com/ to create our classes and then remove what we don't need. Then we end up with the following classes.
public class DayRankingList
{
public int UserID { get; set; }
public int UserCharm { get; set; }
public string UserName { get; set; }
}
public class Data
{
public List<DayRankingList> DayRankingList { get; set; }
}
public class RootObject
{
public Data Data { get; set; }
}
Which you can deserialise like this
string json = .....
var root = JsonConvert.DeserializeObject<RootObject>(json);
Then if you wish, you can extract the inner data into a new List<> and then just work on that.
List<DayRankingList> rankingLists = root.Data.DayRankingList;
//Do something with this, such as output it
foreach(DayRankingList drl in rankingLists)
{
Console.WriteLine(String.Format("UserId {0} UserCharm {1} UserName {2}",drl.UserId, drl.UserCharm, drl.UserName));
}
You can use Json.Linq to parse your JSON into JObject and enumerate DayRankingList items (since it's an array). Then convert every item into data class and order the result sequence by UserID
var jObject = JObject.Parse(json);
var rankingList = (jObject["Data"] as JObject)?.Property("DayRankingList");
var list = rankingList.Value
.Select(rank => rank.ToObject<data>())
.OrderBy(item => item?.UserID);
foreach (var user in list)
Console.WriteLine($"{user.UserID} {user.UserName}");
Another way is copy your JSON, go to Edit->Paste Special->Paste JSON as classes menu in Visual Studio and generate a proper class hierarchy (I've got 5 classes, they are quite long to post here), then use them during deserialization
The most type-safe way is to define the class structure that you want, like jason.kaisersmith suggested.
To have the final format you need, though, you might want to do an extra Linq Order and Select, to include the id:
var finalList = rankingLists.OrderBy(rl => rl.UserId).Select((value, index) => new
{
id = index,
value.UserId,
value.UserCharm,
value.UserName
});
foreach (var drl in finalList)
{
Console.WriteLine($"Id = {drl.id}, UserId = {drl.UserId}, UserCharm = {drl.UserCharm}, UserName = {drl.UserName}");
}
I'm using the HtmlAgility pack to scrape data from this url:
http://www.myfitnesspal.com/food/diary/chuckgross
Essentially, the only data I really need is calories, protein, fat and carbs. The issue is that these columns are user ordered (and users can even not show some of them!).
I'm trying to return that page data into a class:
public class NutritionRecord
{
public string Calories { get; set; }
public string Protein { get; set; }
public string Fat { get; set; }
public string Carbs { get; set; }
}
My idea was to scrape the row with the names of the columns (its a footer), and then scrape the Totals row, and then combine them into a new table, and then somehow figure out how to select the data for a column. I haven't gotten that far. This is what I have so far but feel like I'm just flailing:
http://pastebin.com/uYvMYuM3
This code returns an HTML table, and I cannot figure out how to get the data from the columns. Example in English: Give me the data in the cell whose's column header == "protein".
What the table looks like:
<table class='resultsTable'>
<tr class='labels'>
<th>Calories</th>
<th>Protein</th>
<th>Fat</th>
<th>Carbs</th>
<th>Fiber</th>
</tr>
<tr class='resultsTotals'>
<td>2,386</td>
<td>194</td>
<td>109</td>
<td>161</td>
<td>38</td>
</tr>
</table>
Try this, you don't need to scrap the totals just generate them from the result of the following, this should take care of hidden and reordered columns
public class NutritionRecord
{
public string Meal { get; set; }
public string MealPart { get; set; }
public string Calories { get; set; }
public string Protein { get; set; }
public string Fat { get; set; }
public string Carbs { get; set; }
public string Fiber { get; set; }
public string Sugar { get; set; }
}
and the scrape part:
var html = new WebClient().DownloadString("http://www.myfitnesspal.com/food/diary/chuckgross");
var doc = new HtmlAgilityPack.HtmlDocument();
doc.LoadHtml(html);
var list = new List<NutritionRecord>();
var orderedColumnsList = doc.DocumentNode.SelectNodes("//tr[#class='meal_header']/td[#class='alt']").Select(td=>td.InnerText.Trim()).ToList();
var trs = doc.DocumentNode.SelectNodes("//tr").ToList();
for (var i = 0; i < trs.Count; i++)
{
bool isMealHeader = false;
if (trs[i].Attributes["class"] != null)
{
isMealHeader = trs[i].Attributes["class"].Value == "meal_header";
}
if (isMealHeader)
{
var dataRows = trs[i].SelectNodes("./following-sibling::*").TakeWhile(tr => !tr.HasAttributes)
.Select(tr => new NutritionRecord() {
Meal = WebUtility.HtmlDecode( trs[i].SelectSingleNode("./td[#class='first alt']").InnerText.Trim()),
MealPart = WebUtility.HtmlDecode(tr.SelectSingleNode("./td[#class='first alt']").InnerText.Trim()),
Calories = tr.SelectSingleNode(string.Format("./td[not(contains(#class, 'delete'))][{0}]", orderedColumnsList.IndexOf("Calories") + 2)).InnerText,
Protein = tr.SelectSingleNode(string.Format("./td[not(contains(#class, 'delete'))][{0}]", orderedColumnsList.IndexOf("Protein") + 2)).InnerText,
Fat = tr.SelectSingleNode(string.Format("./td[not(contains(#class, 'delete'))][{0}]", orderedColumnsList.IndexOf("Fat") + 2)).InnerText,
Carbs = tr.SelectSingleNode(string.Format("./td[not(contains(#class, 'delete'))][{0}]", orderedColumnsList.IndexOf("Carbs") + 2)).InnerText,
Fiber = tr.SelectSingleNode(string.Format("./td[not(contains(#class, 'delete'))][{0}]", orderedColumnsList.IndexOf("Fiber") + 2)).InnerText,
});
list.AddRange(dataRows);
}
}
and the result:
also to get the columns order get the InnerText of the column headers in order ,then use IndexOf function to get the index of the given column name, and use that index to get the value, for example
var orderedColumnsList = doc.DocumentNode.SelectNodes("//tr[#class='labels']/th").Select(td => td.InnerText.Trim()).ToList();
var carbsValue = doc.DocumentNode.SelectSingleNode(string.Format("//tr[#class='resultsTotals']/td[{0}]", orderedColumnsList.IndexOf("Carbs") + 1)).InnerText;
How to load XML Elements using LINQ from XDocument into a c# class. I don't want to use XDocument.Descendants because the settings are not repeated and occur only once in the XML.
This works but I think there must be another way where I don't have to use IEnumerable or use ToArray() and use the first element [0]. Any suggestions?
CODE
public class BackupItem // class needed so LINQ reads XML into an editable DbGrid
{
public bool Backup { get; set; }
public bool IncludeSubDir { get; set; }
public string BackupLabel { get; set; }
public string BackupPath { get; set; }
}
public class BackupSettings
{
public bool IncludeDateStamp { get; set; }
public bool DatePrefix { get; set; }
public bool DateSuffix { get; set; }
public string DateFormat { get; set; }
public bool ZipCompress { get; set; }
public bool ZipPrefix { get; set; }
public bool ZipSuffix { get; set; }
public string ZipText { get; set; }
public bool BackupToSiblingFolder { get; set; }
public string SiblingFolder { get; set; }
public bool BackupToFolder { get; set; }
public bool IncludeFullPath { get; set; }
public string BackupFolder { get; set; }
}
// use a LINQ query to load xml file into datagridview and make datagrid editable (create class with get/set)
var q = from arg in GvXMLDoc.Descendants("BackupItem")
select new BackupItem()
{
Backup = (bool)arg.Element("IncludeDirectory"),
IncludeSubDir = (bool)arg.Element("IncludeSubDirectories"),
BackupLabel = (string)arg.Element("BackupLabel"),
BackupPath = (string)arg.Element("BackupPath")
};
dataGridView1.DataSource = q.ToList();
// load global variable
IEnumerable<BackupSettings> GvBackupSettings = from arg in GvXMLDoc.Element("Backup").Elements("Settings")
select new BackupSettings()
{
IncludeDateStamp = (bool)arg.Element("IncludeDateStamp"),
DatePrefix = (bool)arg.Element("DatePrefix"),
DateSuffix = (bool)arg.Element("DateSuffix"),
DateFormat = (string)arg.Element("DateFormat"),
ZipCompress = (bool)arg.Element("ZipCompress"),
ZipPrefix = (bool)arg.Element("ZipPrefix"),
ZipSuffix = (bool)arg.Element("ZipSuffix"),
ZipText = (string)arg.Element("ZipText"),
BackupToSiblingFolder = (bool)arg.Element("BackupToSiblingFolder"),
SiblingFolder = (string)arg.Element("SiblingFolder"),
BackupToFolder = (bool)arg.Element("BackupToFolder"),
IncludeFullPath = (bool)arg.Element("IncludeFullPath"),
BackupFolder = (string)arg.Element("BackupFolder")
};
I can access the values but it seems a very 'messy way'.
var s = GvBackupSettings.ToArray()[0].DateSuffix;
var t = GvBackupSettings.ToArray()[0].DateFormat;
XML FILE
<?xml version='1.0'?>
<Backup>
<Settings>
<IncludeDateStamp>true</IncludeDateStamp>
<DatePrefix>false</DatePrefix>
<DateSuffix>true</DateSuffix>
<DateFormat>yyyy-MM-dd h.m.s</DateFormat>
<ZipCompress>false</ZipCompress>
<ZipPrefix>false</ZipPrefix>
<ZipSuffix>false</ZipSuffix>
<ZipText></ZipText>
<BackupToSiblingFolder>true</BackupToSiblingFolder>
<SiblingFolder>backups</SiblingFolder>
<BackupToFolder>false</BackupToFolder>
<IncludeFullPath>true</IncludeFullPath>
<BackupFolder>C:\\backup</BackupFolder>
</Settings>
<BackupItem>
<IncludeDirectory>true</IncludeDirectory>
<IncludeSubDirectories>true</IncludeSubDirectories>
<BackupLabel>Backup1</BackupLabel>
<BackupPath>C:\TestFiles\Xml\Samples</BackupPath>
</BackupItem>
<BackupItem>
<IncludeDirectory>true</IncludeDirectory>
<IncludeSubDirectories>false</IncludeSubDirectories>
<BackupLabel>Backup2</BackupLabel>
<BackupPath>C:\TestFiles\Xml\Samples</BackupPath>
</BackupItem>
</Backup>
EDIT 1
I also am trying to deserialize the XML (thanks for idea) so I don't have to cast each item. This does not work.. I don't want to have to run the XSD tool either and have a huge class file...
XmlRootAttribute rootAttribute = new XmlRootAttribute("Backup");
XmlSerializer deserializer = new XmlSerializer((typeof(BackupSettings)), rootAttribute);
GvBackupSettings = (BackupSettings)deserializer.Deserialize(XmlReader.Create(GvXMLFileName));
EDIT 2
Ended up serializing and deserializing xml as suggested below using stardard XSD.exe tool to generate the c# class. Especially as I had to read and write to same xml file. Note: Make sure you verify/modify the generated xsd file first.
You don't need a query if you just need the first element:
XElement settings = GvXMLDoc.Element("Backup").Element("Settings");
BackupSettings GvBackupSettings = new BackupSettings
{
IncludeDateStamp = (bool)settings.Element("IncludeDateStamp"),
DatePrefix = (bool)settings.Element("DatePrefix"),
...
};
var s = GvBackupSettings.DateSuffix;
var t = GvBackupSettings.DateFormat;