I am trying to parse this data:
<Product>
<ProductName>Climate Guard</ProductName>
<Tag>ClimateGuard</Tag>
<SupportPage>~/Support/ClimateGuard.aspx</SupportPage>
<ProductPage>~/Products/ClimateGuard.aspx</ProductPage>
<ProductCategories>
<ProductCategory>Climate Guard</ProductCategory>
<PartNumbers>
<PartNumber Primary="true">CLIMATE GUARD</PartNumber>
<PartNumber>CLIMATEGUARD LT</PartNumber>
<PartNumber>CLIMATE GUARD STARTER KIT</PartNumber>
<PartNumber>SENSOR MODULE</PartNumber>
<PartNumber>SWCH INP MODULE</PartNumber>
<PartNumber>TEMP SENSOR</PartNumber>
<PartNumber>HUMIDITY SENSOR</PartNumber>
<PartNumber>DOOR CONTACT</PartNumber>
<PartNumber>MOTION SENSOR</PartNumber>
<PartNumber>FLOOD DETECTOR</PartNumber>
<PartNumber>SMOKE DETECTOR</PartNumber>
<PartNumber>TILT SENSOR</PartNumber>
<PartNumber>SENSOR CABLE</PartNumber>
<PartNumber>PWR INP CABLE</PartNumber>
<PartNumber>100FT 2-WIRE</PartNumber>
<PartNumber>RJ25 COUPLER</PartNumber>
</PartNumbers>
</ProductCategories>
<Downloads>
<Download>
<Version>1.0.27</Version>
<Url>~/Files/Downloads/ClimateGuard_Firmware_1_0_27.bin</Url>
<Comment>Firmware</Comment>
</Download>
<Download>
<Version>1.0.6</Version>
<Url>~/Files/Downloads/ClimateGuard_BuiltInModule_1_0_6.bin</Url>
<Comment>Built-in Module</Comment>
</Download>
<Download>
<Version>1.0.2</Version>
<Url>~/Files/Downloads/ClimateGuard_SensorModule_1_0_2.bin</Url>
<Comment>Sensor Module</Comment>
</Download>
<Download>
<Version>1.0.0</Version>
<Url>~/Files/Downloads/ClimateGuard_SwitchInputModule_1_0_0.bin</Url>
<Comment>Switch Input Module</Comment>
</Download>
</Downloads>
</Product>
I am trying to get a List of part numbers, however, only the first appears:
Product Category Climate Guard
Part Number Climate Guard
What is wrong with my part numbers code:
public List<Products> GetProducts()
{
XElement myElement = XElement.Load(HttpContext.Current.Server.MapPath("~/App_Data/products.xml"));
var query = from a in myElement.Elements("Product")
select new Products
{
ProductName = a.Element("ProductName").Value,
Tag = a.Element("Tag").Value,
SupportPage = a.Element("SupportPage").Value,
ProductPage = a.Element("ProductPage").Value,
ProductCategories = from b in a.Elements("ProductCategories")
select new ProductCategories
{
ProductCategory = b.Element("ProductCategory").Value,
//PartNumbers = GetPartNumbers(myElement.Elements("Product").Elements("ProductCategories").Elements("PartNumbers").Elements("PartNumber"))
PartNumbers = from c in b.Elements("PartNumbers")
select new PartNumbers
{
PartNumber = c.Element("PartNumber").Value
}
},
Downloads = from bb in a.Elements("Downloads").Elements("Download")
select new Downloads
{
Comment = bb.Element("Comment").Value,
Url = bb.Element("Url").Value,
Version = bb.Element("Version").Value
},
};
return query.ToList();
}
All of the types (ProductName, Tag, etc.) are strings. PartNumbers is an IEnumerable.
Currently instead of getting collection of PartNumber element values, you are getting only element for their parent PartNumbers with value of first PartNumber child inside. If you want to have PartNumbers class instead of simple list of string values, then it should look like:
public class PartNumbers
{
// list instead of single value
public List<string> Numbers { get; set; }
}
And it should be parsed this way:
PartNumbers = new PartNumbers {
Numbers = b.Element("PartNumbers").Elements()
.Select(c => (string)c).ToList()
}
BTW why are you choosing so strange range variable names (b for ProductCategories elements, a for products, etc)? Also you can use simple List<string> to store part numbers (without creating class for that):
PartNumbers = b.Element("PartNumbers").Elements().Select(c => (string)c).ToList()
You may have forgotten the ToList() for ProductCategories, PartNumbers and Downloads.
public List<Products> GetProducts()
{
XElement myElement = XElement.Load(HttpContext.Current.Server.MapPath("~/App_Data/products.xml"));
var query = from a in myElement.Elements("Product")
select new Products
{
ProductName = a.Element("ProductName").Value,
Tag = a.Element("Tag").Value,
SupportPage = a.Element("SupportPage").Value,
ProductPage = a.Element("ProductPage").Value,
ProductCategories = (from b in a.Elements("ProductCategories")
select new ProductCategories
{
ProductCategory = b.Element("ProductCategory").Value,
//PartNumbers = GetPartNumbers(myElement.Elements("Product").Elements("ProductCategories").Elements("PartNumbers").Elements("PartNumber"))
PartNumbers = (from c in b.Elements("PartNumbers")
select new PartNumbers
{
PartNumber = c.Element("PartNumber").Value
}).ToList()
}).ToList(),
Downloads = (from bb in a.Elements("Downloads").Elements("Download")
select new Downloads
{
Comment = bb.Element("Comment").Value,
Url = bb.Element("Url").Value,
Version = bb.Element("Version").Value
}).ToList(),
};
return query.ToList();
}
Related
Could I please get some help with querying from a JSON file? Populating a datagrid view works just fine but what I am trying to do now is filter the data using LINQ which I'm really struggling with.
This works just fine, populating the datagridview with all of my jsonfile data
//dataGridView1.DataSource = (from p in movie2
// select p).ToArray();
Below is what I have been playing around with. When I group by employee ID into g, I can not longer use my p references to fields.
using (StreamReader file = File.OpenText(#"C:\temp\GRMReportingJSONfiles\Assigned_FTE\" + myFile))
{
JsonSerializer serializer = new JsonSerializer();
IEnumerable<AssgnData> movie2 = (IEnumerable<AssgnData>)serializer.Deserialize(file, typeof(IEnumerable<AssgnData>));
dataGridView1.DataSource = (from p in movie2
group p by p.EMPLID[0] into g
select new {
EMPLID = p.EMPLID,
(decimal?)decimal.Parse(p.MNTH1) ?? 0).Sum(),
};
);
//dataGridView1.DataSource = (from p in movie2
// select Int32.Parse(p.MNTH1).Sum();
dataGridView1.DataSource = (from p in movie2
group p by p.EMPLID[0] into g
select (decimal?)decimal.Parse(p.MNTH1) ?? 0).Sum(); //dataGridView1.DataSource = (from p in movie2
// select p).ToArray();
//where p.Resource_BU == "7000776"
//chart1.DataBindCrossTable(movie2, "MNTH1", "1", "PROJECT_ID", "Label = FTE");
//chart1.Refresh();
}
Here is part of the array layout, removed other fields for now as I was just trying to focus on these two, dataset has 100k rows and 50 columns
public class AssgnData
{
public string EMPLID { get; set; }
public string MNTH1 { get; set; }
}
In my opinion, using Fluent Syntax usually makes it a bit easier to understand what is going wrong here.
As soon as you group your data you are no longer working on the individual objects, but on a 'group', which is the key and an enumerable of objects.
Getting the sum per employee should then be grouping by the full employee id and then parsing the MNTH1 fields of your objects and summing them.
dataGridView1.DataSource = movie2
.GroupBy(p => p.EMPLID) // create a group of data per employee
.Select(g => new
{
EMPLID = g.Key, // the employee id is the group key
Sum = g.Sum(data => decimal.Parse(data.MNTH1)) // parse and sum
})
.ToArray();
Edit: you are right, you need the ToArray to evaluate the query. I just verified on my computer and it works.
Try following :
class Program
{
static void Main(string[] args)
{
IEnumerable<AssgnData> movie2 = null;
dataGridView1.DataSource = movie2.GroupBy(x => new {id = x.EMPLID, month = x.MNTH1})
.Select(x => new {
EMPLYID = x.Key.id,
MONTH = x.Key.month,
SUM = x.Sum(y => y.value)
});
}
}
public class AssgnData
{
public string EMPLID { get; set; }
public string MNTH1 { get; set; }
public int value { get;set;}
}
In other words I need all the elements of list "Categories" to be the "Parent" and elements of list "commodities" be the children.
Example
public string GetCommodities()
{
List<dynamic> categories = new List<dynamic>();
List<dynamic> commodities = new List<dynamic>();
foreach (var comcat in QuickQuoteRepo.CommodityCategories.All().OrderBy(o => o.Order))
{
categories.Add(new
{
comcat.Category,
});
foreach (var com in comcat.Commodities.OrderBy(o => o.Name))
{
commodities.Add(new
{
com.Name,
});
}
}
var response = new JavaScriptSerializer().Serialize(commodities);
return response;
}
And see if it's possible to all commodities names inside each category, within this foreach.
I tried adding a dynamic list such as:
dynamic listOfElements = new { CAT = categories, COMM = commodities };
But it does't return elemnts as parents or dependency of categories. Is the same as adding
commodities.Add(new
{
comcat.Category,
com.Name,
});
public string GetCommodities()
{
List<dynamic> categoryCommodityList = new List<dynamic>();
foreach (var comcat in QuickQuoteRepo.CommodityCategories.All().OrderBy(o => o.Order))
{
var allCommodities = comcat.Commodities.OrderBy(o => o.Name).Select(com => com.Name).ToList();
categoryCommodityList.Add(new { Catagory = comcat.Category, Items = allCommodities } );
}
return new JavaScriptSerializer().Serialize(categoryCommodityList);
}
You class structure does not support parent-child relationships. I mean, if what you want is that each Category holds a list of commodities, then you would need something like this:
var result = from c in comcat
select new { Category = c, Commoddities = c.Commoddities};
This will return a hierarchy of Categories including all Commodities underneath it.
If you are just receiving a flat data set, then you need something like this:
var result = from c in comcat
select new { Category = c,
Commoddities = c.Where(x=>x.Category.Name == c.Name).Select(x=>x.Commodity) };
Hopefully you get the idea...
I have the following responses from the API. How can I group them into the following structure?
Student[]
- Name
- Classes[]
- ClassName
- ClassId
- ClassCategories[]
- CategoryName
- CategoryWeight
- Assignments[]
- AssignmentName
- Score
I was managed to group them until the "Classes" level but unable to get the ClassCategories for each of the classes
var data = (from result in results
group result by new { result.StudentId, result.FirstName, result.LastName, result.MiddleInitial }
into StudentGroup
select new GroupedStudent
{
StudentId = StudentGroup.Key.StudentId,
FullName = string.Format("{0} {1} {2}", StudentGroup.Key.FirstName, StudentGroup.Key.MiddleInitial, StudentGroup.Key.LastName).Replace(" ", " "),
Classes = from result in results
group result by new { result.ClassId, result.ClassName } into ClassGroup
select new groupedClass
{
ClassName = ClassGroup.Key.ClassName,
ClassId = ClassGroup.Key.ClassId,
ClassCategories = ...
})
}).ToList();
Can anyone please assists me? Thank you.
First, you have make ClassGroup from StudentGroup not from results.
Classes = from s in StudentGroup group result by new { s.ClassId, s.ClassName } into ClassGroup
The complete linq query is as follows:
var data =
(from result in results
group result by new { result.StudentId, result.FirstName, result.LastName, result.MiddleInitial } into StudentGroup
select new
{
StudentId = StudentGroup.Key.StudentId,
FullName = string.Format("{0} {1} {2}", StudentGroup.Key.FirstName, StudentGroup.Key.MiddleInitial, StudentGroup.Key.LastName).Replace(" ", " "),
Classes = (from s in StudentGroup
group s by new { s.ClassId, s.ClassName } into ClassGroup
select new
{
ClassId = ClassGroup.Key.ClassId,
ClassName = ClassGroup.Key.ClassName,
ClassCategories = (from c in ClassGroup
group c by new { c.CategoryName, c.CategoryWeight } into CategoryGroup
select new
{
CategoryName = CategoryGroup.Key.CategoryName,
CategoryWeight = CategoryGroup.Key.CategoryWeight,
Assignments = (from ct in CategoryGroup
group ct by new { ct.AssignmentName, ct.Score } into AssingnmentGroup
select new
{
AssignmentName = AssingnmentGroup.Key.AssignmentName,
Score = AssingnmentGroup.Key.Score
}).ToList()
}).ToList()
}).ToList()
}).ToList();
For example, if you want to access to the first Assignment's score, you can get it like this:
var student = data.FirstOrDefault();
var score = student.Classes[0].ClassCategories[0].Assignments[0].Score;
This is usually how I do It.
Create a class to store your data
Create a list of that class type
In your case instead of string dataRow maybe you can use a sub class
.
// get data from webservice
var json = webClient.DownloadString(url);
var values = JsonConvert.DeserializeObject<JArray>(json);
// create a list to save all the element
List<myClass> classList = new List<myClass>();
// process every row
foreach (string dataRow in values)
{
string[] dataField = dataRow.Split(',');
// have a constructor to assign each value to this element
myClass ctROW = new myClass(dataField);
classList.add(ctROW );
I have a linq query which is working fine.How can i use group by in this query.I need to group by username and itemid and i should get sum(Amount)(All are in table called Carts)
FoodContext db = new FoodContext();
List<CartListing> fd = (from e in db.FoodItems
join o in db.Carts on e.itemid equals o.itemid
where e.itemid == o.itemid
select new CartListing
{
Itemname =e.itemname,
Amount =o.amount,
Price=(float)(e.price*o.amount),
}).ToList();
CartModel vm = new CartModel { CartListings = fd };
I can't see username anywhere in your code example, but to group by Itemname and sum Amount, you would something like:
var grouped = fd.GroupBy(
cl => cl.Itemname,
(key, group) => new CartListing
{
Itemname = key,
Amount = group.Sum(cl => cl.Amount),
Price = group.Sum(cl => cl.Price)
});
To also group by username, just generate a text key containing both values, for instance delimited by a character you know will be contained in neither.
Use:
var grouped = fd.GroupBy((a => new { a.itemid,a.name }) into grp
select new MyClass
{
MyProperty1=grp.key.itemid,
MyProperty2 =grp.Sum(x=>x.whatever)
}
Public MyClass
{
public string MyProperty1 {get;set;}
public int MyProperty2 {get;set;}
}
This way it won't be anonymous
I have a class Item with a string List ImagesUrl property:
public class Item
{
string Name { get; set; }
List<string> ImagesUrl { get; set; }
..
}
And I want to parse a XML file and save each node item into var items. In node item there are nodes img1, .. , img5 and right these I want to save into the Img property by using LINQ command like this:
var items = from item in xmlDocument.Descendants("item")
select new Item
{
Name = item.Element("name").Value,
ImagesUrl = item.Element("img1").Value, //....?
..
};
How you can see, I don't know how I could save the img1..5 values in LINQ. Could someone help me?
var items = from item in xmlDocument.Descendants("item")
select new Item
{
Name = item.Element("name").Value,
ImagesUrl = Enumerable.Range(1,5).Select(x => item.Element("img"+x).Value).ToList();
};
Code is self-explanatory here.
Universal solution independent on count of imgX elements
var items = from item in Xml.Descendants("item")
select new Item
{
Name = item.Element("name").Value,
ImagesUrl = item.Elements()
.Where(e => e.Name.LocalName.StartsWith("img"))
.Select(e => e.Value)
.ToList()
};