I want to store multiple name in Isolated storage.And i use this code for store multopple storage
if (!setting.Contains("CityDetail"))
{
setting.Add("CityDetail", cityname);
}
else
{
setting["CityDetail"] = cityname;
}
setting.Save();
But it gives only last added value,h=So how can i fetch all the data base value?
You can use these function to store your objects in phoneapplication state
public static void SaveState(string key, object value)
{
if (phoneApplicationPage.State.ContainsKey(key))
{
phoneApplicationPage.State.Remove(key);
}
phoneApplicationPage.State.Add(key, value);
}
public static object LoadState(this PhoneApplicationPage phoneApplicationPage, string key)
{
if (phoneApplicationPage.State.ContainsKey(key))
{
return phoneApplicationPage.State[key];
}
return null;
}
Edit-Using isolatedsettings
public void SaveCompositeObject()
{
var settings = IsolatedStorageSettings.ApplicationSettings;
Person person= new City { Name = "Alex", Age= "21" };
settings.Add("person", person);
}
public class Person
{
public string Name
{
get;
set;
}
public string Age
{
get;
set;
}
}
retrieving data
Person person1;
settings.TryGetValue<Person>("person", out person11);
Related
I am trying to use CsvHelper library to write CSV stream to a file. All is well however I am stuck with 2 things
How do I add additional columns to the csv file. The additional column value will be a constant but will only be known at runtime.
Is there a way to sort the CSV file on a particular field if I am writing one record at a time and also when I am writing all at once
static void Main(string[] args)
{
var records = new List<MyTest>
{
new MyTest { Id = 1, Name = "John", Extra = "hello" },
new MyTest { Id = 2, Name = "Jack", Extra = "hi" },
};
using (var writer = new StreamWriter("C:\\Users\\machina\\AppData\\Local\\Temp\\file.csv"))
using (var csv = new CsvWriter(writer, CultureInfo.InvariantCulture))
{
csv.Context.RegisterClassMap<TestMap<MyTest>>();
csv.WriteRecords<MyTest>(records);
}
}
}
public interface IData
{
public int Id { get; set; }
public string Name { get; set; }
}
public abstract class AbTest : IData
{
public abstract int Id { get; set; }
public abstract string Name { get; set; }
public abstract string Extra { get; set; }
}
public class MyTest : AbTest
{
public override int Id { get; set; }
public override string Name { get; set; }
public override string Extra { get; set; }
}
public class TestMap<T> : ClassMap<MyTest>
{
public TestMap()
{
AutoMap(CultureInfo.InvariantCulture);
}
}
The above works as I have prepared the data records however what I want to achieve is to dynamically add Extra column values to my existing stream of csv data which does not have it.
Also I saw DynamicPropertySort under csvconfiguration and wanted to check if this can be used in any way to sort the fields in my CSV stream before its written even when its writing one record at a time?
I am a novoice developer so let me know if there is a better way to achieve this.
The easiest way to dynamically add columns would likely be to manually write out each row.
DynamicPropertySort is just used for ordering the columns of a dynamic object. You can sort on a particular field using the linq OrderBy() method.
static void Main(string[] args)
{
var records = new List<MyTest>
{
new MyTest { Id = 1, Name = "John", Extra = "hello" },
new MyTest { Id = 2, Name = "Jack", Extra = "hi" },
};
var extraField1 = 10;
var extraField2 = "Testing";
using (var writer = new StreamWriter("C:\\Users\\machina\\AppData\\Local\\Temp\\file.csv"))
using (var csv = new CsvWriter(writer, CultureInfo.InvariantCulture))
{
csv.Context.RegisterClassMap<TestMap>();
var orderedRecords = records.OrderBy(r => r.Name);
csv.WriteHeader<MyTest>();
csv.WriteField("ExtraField1");
csv.WriteField("ExtraField2");
csv.NextRecord();
foreach (var record in orderedRecords)
{
csv.WriteRecord(record);
csv.WriteField(extraField1);
csv.WriteField(extraField2);
csv.NextRecord();
}
}
}
Let's say that you have the following code
public class MyClass {
public double Latitude {get; set;}
public double Longitude {get; set;}
}
public class Criteria
{
public DateTime StartDate { get; set; }
public DateTime EndDate { get; set; }
public MyClass MyProp {get; set;}
}
[HttpGet]
public Criteria Get([FromUri] Criteria c)
{
return c;
}
I'd like to know if someone is aware of a library that could transform any object into query string that is understood by a WEB API 2 Controller.
Here is an example of what I'd like
SerializeToQueryString(new Criteria{StartDate=DateTime.Today, EndDate = DateTime.Today.AddDays(1), MyProp = new MyProp{Latitude=1, Longitude=3}});
=> "startDate=2015-10-13&endDate=2015-10-14&myProp.latitude=1&myProp.longitude=3"
A full example with httpClient might look like :
new HttpClient("http://localhost").GetAsync("/tmp?"+SerializeToQueryString(new Criteria{StartDate=DateTime.Today, EndDate = DateTime.Today.AddDays(1), MyProp = new MyProp{Latitude=1, Longitude=3}})).Result;
At the moment, I use a version (taken from a question I do not find again, maybe How do I serialize an object into query-string format? ...).
The problem is that it is not working for anything else than simple properties.
For example, calling ToString on a Date will not give something that is parseable by WEB API 2 controller...
private string SerializeToQueryString<T>(T aObject)
{
var query = HttpUtility.ParseQueryString(string.Empty);
var fields = typeof(T).GetProperties();
foreach (var field in fields)
{
string key = field.Name;
var value = field.GetValue(aObject);
if (value != null)
query[key] = value.ToString();
}
return query.ToString();
}
"Transform any object to a query string" seems to imply there's a standard format for this, and there just isn't. So you would need to pick one or roll your own. JSON seems like the obvious choice due to the availability of great libraries.
Since it seems no one has dealt with the problem before, here is the solution I use in my project :
using System;
using System.Collections;
using System.Collections.Specialized;
using System.Globalization;
using System.Linq;
using System.Web;
namespace App
{
public class QueryStringSerializer
{
public static string SerializeToQueryString(object aObject)
{
return SerializeToQueryString(aObject, "").ToString();
}
private static NameValueCollection SerializeToQueryString(object aObject, string prefix)
{
//!\ doing this to get back a HttpValueCollection which is an internal class
//we want a HttpValueCollection because toString on this class is what we want in the public method
//cf http://stackoverflow.com/a/17096289/1545567
var query = HttpUtility.ParseQueryString(String.Empty);
var fields = aObject.GetType().GetProperties();
foreach (var field in fields)
{
string key = string.IsNullOrEmpty(prefix) ? field.Name : prefix + "." + field.Name;
var value = field.GetValue(aObject);
if (value != null)
{
var propertyType = GetUnderlyingPropertyType(field.PropertyType);
if (IsSupportedType(propertyType))
{
query.Add(key, ToString(value));
}
else if (value is IEnumerable)
{
var enumerableValue = (IEnumerable) value;
foreach (var enumerableValueElement in enumerableValue)
{
if (IsSupportedType(GetUnderlyingPropertyType(enumerableValueElement.GetType())))
{
query.Add(key, ToString(enumerableValueElement));
}
else
{
//it seems that WEB API 2 Controllers are unable to deserialize collections of complex objects...
throw new Exception("can not use IEnumerable<T> where T is a class because it is not understood server side");
}
}
}
else
{
var subquery = SerializeToQueryString(value, key);
query.Add(subquery);
}
}
}
return query;
}
private static Type GetUnderlyingPropertyType(Type propType)
{
var nullablePropertyType = Nullable.GetUnderlyingType(propType);
return nullablePropertyType ?? propType;
}
private static bool IsSupportedType(Type propertyType)
{
return SUPPORTED_TYPES.Contains(propertyType) || propertyType.IsEnum;
}
private static readonly Type[] SUPPORTED_TYPES = new[]
{
typeof(DateTime),
typeof(string),
typeof(int),
typeof(long),
typeof(float),
typeof(double)
};
private static string ToString(object value)
{
if (value is DateTime)
{
var dateValue = (DateTime) value;
if (dateValue.Hour == 0 && dateValue.Minute == 0 && dateValue.Second == 0)
{
return dateValue.ToString("yyyy-MM-dd");
}
else
{
return dateValue.ToString("yyyy-MM-dd HH:mm:ss");
}
}
else if (value is float)
{
return ((float) value).ToString(CultureInfo.InvariantCulture);
}
else if (value is double)
{
return ((double)value).ToString(CultureInfo.InvariantCulture);
}
else /*int, long, string, ENUM*/
{
return value.ToString();
}
}
}
}
Here is the unit test to demonstrate :
using System;
using System.Collections.Generic;
using System.Globalization;
using Microsoft.VisualStudio.TestTools.UnitTesting;
namespace Framework.WebApi.Core.Tests
{
[TestClass]
public class QueryStringSerializerTest
{
public class EasyObject
{
public string MyString { get; set; }
public int? MyInt { get; set; }
public long? MyLong { get; set; }
public float? MyFloat { get; set; }
public double? MyDouble { get; set; }
}
[TestMethod]
public void TestEasyObject()
{
var queryString = QueryStringSerializer.SerializeToQueryString(new EasyObject(){MyString = "string", MyInt = 1, MyLong = 1L, MyFloat = 1.5F, MyDouble = 1.4});
Assert.IsTrue(queryString.Contains("MyString=string"));
Assert.IsTrue(queryString.Contains("MyInt=1"));
Assert.IsTrue(queryString.Contains("MyLong=1"));
Assert.IsTrue(queryString.Contains("MyFloat=1.5"));
Assert.IsTrue(queryString.Contains("MyDouble=1.4"));
}
[TestMethod]
public void TestEasyObjectNullable()
{
var queryString = QueryStringSerializer.SerializeToQueryString(new EasyObject() { });
Assert.IsTrue(queryString == "");
}
[TestMethod]
public void TestUrlEncoding()
{
var queryString = QueryStringSerializer.SerializeToQueryString(new EasyObject() { MyString = "&=/;+" });
Assert.IsTrue(queryString.Contains("MyString=%26%3d%2f%3b%2b"));
}
public class DateObject
{
public DateTime MyDate { get; set; }
}
[TestMethod]
public void TestDate()
{
var d = DateTime.ParseExact("2010-10-13", "yyyy-MM-dd", CultureInfo.InvariantCulture);
var queryString = QueryStringSerializer.SerializeToQueryString(new DateObject() { MyDate = d });
Assert.IsTrue(queryString.Contains("MyDate=2010-10-13"));
}
[TestMethod]
public void TestDateTime()
{
var d = DateTime.ParseExact("2010-10-13 20:00", "yyyy-MM-dd HH:mm", CultureInfo.InvariantCulture);
var queryString = QueryStringSerializer.SerializeToQueryString(new DateObject() { MyDate = d });
Assert.IsTrue(queryString.Contains("MyDate=2010-10-13+20%3a00%3a00"));
}
public class InnerComplexObject
{
public double Lat { get; set; }
public double Lon { get; set; }
}
public class ComplexObject
{
public InnerComplexObject Inner { get; set; }
}
[TestMethod]
public void TestComplexObject()
{
var queryString = QueryStringSerializer.SerializeToQueryString(new ComplexObject() { Inner = new InnerComplexObject() {Lat = 50, Lon = 2} });
Assert.IsTrue(queryString.Contains("Inner.Lat=50"));
Assert.IsTrue(queryString.Contains("Inner.Lon=2"));
}
public class EnumerableObject
{
public IEnumerable<int> InnerInts { get; set; }
}
[TestMethod]
public void TestEnumerableObject()
{
var queryString = QueryStringSerializer.SerializeToQueryString(new EnumerableObject() {
InnerInts = new[] { 1,2 }
});
Assert.IsTrue(queryString.Contains("InnerInts=1"));
Assert.IsTrue(queryString.Contains("InnerInts=2"));
}
public class ComplexEnumerableObject
{
public IEnumerable<InnerComplexObject> Inners { get; set; }
}
[TestMethod]
public void TestComplexEnumerableObject()
{
try
{
QueryStringSerializer.SerializeToQueryString(new ComplexEnumerableObject()
{
Inners = new[]
{
new InnerComplexObject() {Lat = 50, Lon = 2},
new InnerComplexObject() {Lat = 51, Lon = 3},
}
});
Assert.Fail("we should refuse something that will not be understand by the server");
}
catch (Exception e)
{
Assert.AreEqual("can not use IEnumerable<T> where T is a class because it is not understood server side", e.Message);
}
}
public enum TheEnum : int
{
One = 1,
Two = 2
}
public class EnumObject
{
public TheEnum? MyEnum { get; set; }
}
[TestMethod]
public void TestEnum()
{
var queryString = QueryStringSerializer.SerializeToQueryString(new EnumObject() { MyEnum = TheEnum.Two});
Assert.IsTrue(queryString.Contains("MyEnum=Two"));
}
}
}
I'd like to thank all the participants even if this is not something that you should usually do in a Q&A format :)
ActionBase, ActionA, ActionB and ActionC are Entities (from a database). ActionA, ActionB and ActionC are derived type of ActionBase.
ActionB and ActionC implements ISpecialAction with a SpecialProperty.
ex :
public interface ISpecialAction
{
Guid SpecialProperty { get; }
}
public partial class ActionBase
{
public objectX OnePropertyBase { get; set; }
}
public partial class ActionA : ActionBase
{
public objectY OnePropertyA { get; set; }
}
public partial class ActionB:ActionBase,ISpecialAction
{
public objectZ OnePropertyB { get; set; }
public Guid SpecialProperty
{
get
{
return OnePropertyB.ID;
}
}
}
public partial class ActionC : ActionBase ,ISpecialAction
{
public objectW OnePropertyC { get; set; }
public Guid SpecialProperty
{
get
{
return OnePropertyC.ID;
}
}
}
My problem is that SpecialProperty is build from other Properties of the objects (ActionB or ActionC) and when the cast (to ISpecialAction) is done, OtherProperty and OtherProperty2 are null.
I tried :
GetActionBase().ToList().Where(x=>x is ISpecialAction && ((dynamic) x).SpecialProperty== p_SpecialProperty);
GetActionBase().ToList().Where(x=>x is ISpecialAction && ((ISpecialAction) x).SpecialProperty== p_SpecialProperty);
GetActionBase().ToList().OfType<ISpecialAction>().Where(x => x.SpecialProperty== p_SpecialProperty).Cast<ActionBase>();
return GetActionOnGoing().ToList().OfType<ICityAction>().Cast<ActionBase>().Where(x => ((dynamic)x).CityId == p_CityId);
remark : OfType<> doesn't works with an Interface in Linq to entities but is ok in Linq to object
How do I access my property interface without knowing the type of the object?
I might missed something but this is Ok with the code you provided :
public class objectX
{
}
public class objectY
{
}
public class objectZ
{
public Guid ID { get { return Guid.NewGuid();} }
}
public class objectW
{
public Guid ID { get { return new Guid(); } }
}
class Program
{
private static Guid p_SpecialProperty;
static void Main(string[] args)
{
var result = GetActionBase().ToList().Where(x => x is ISpecialAction && ((dynamic)x).SpecialProperty == p_SpecialProperty).FirstOrDefault();
var result1 = GetActionBase().ToList().Where(x => x is ISpecialAction && ((ISpecialAction)x).SpecialProperty == p_SpecialProperty).FirstOrDefault();
var result2 = GetActionBase().ToList().OfType<ISpecialAction>().Where(x => x.SpecialProperty == p_SpecialProperty).Cast<ActionBase>().FirstOrDefault();
}
private static IEnumerable<ActionBase> GetActionBase()
{
return new List<ActionBase> {new ActionA{OnePropertyA= new objectY()}, new ActionB{OnePropertyB=new objectZ()},new ActionC{OnePropertyC=new objectW()} };
}
}
Not sure if I exactly understand your question, but could you try using an intermediate interface, such as:
public interface ISpecialActionB : ISpecialAction
{
objectZ OnePropertyB { get; set; }
}
public class ActionB : ActionBase, ISpecialActionB
{
//same stuff
}
and casting to that instead.
var b = new ActionB{OnePropertyB = new Whatever()};
var bAsSpecial = b as ISpecialActionB;
var whatever = b.OnePropertyB; // should not be null
It' ok.
Your example run very well without problem so I searched in a other way : AutoMapper.
l_List.Actions = Mapper.Map<List<ActionBase>, Action[]>(l_ActionManagement.GetActionBySpecialId(l_Special.ID).ToList());
The problem was not interfaces or Linq queries but it was that automapper need an empty constructor and in this constructor, I need to initialize OnePropertyB and OnePropertyC to compute SpecialProperty.
Thanks
Using "string.Join(",", test);" works but for some reason I get an output of:
"Ilistprac.Location, Ilistprac.Location, Ilistprac.Location"
I tried ToString, Convert.ToString, etc and I still get that output.
All the IList interfaces are implemented with the IEnurmerable too (just not listed here unless someone wants me to).
class IList2
{
static void Main(string[] args)
{
string sSite = "test";
string sBldg = "test32";
string sSite1 = "test";
string sSite2 = "test";
Locations test = new Locations();
Location loc = new Location();
test.Add(sSite, sBldg)
test.Add(sSite1)
test.Add(sSite2)
string printitout = string.Join(",", test); //having issues outputting whats on the list
}
}
string printitout = string.Join(",", test.ToArray<Location>);
public class Location
{
public Location()
{
}
private string _site = string.Empty;
public string Site
{
get { return _site; }
set { _site = value; }
}
}
public class Locations : IList<Location>
{
List<Location> _locs = new List<Location>();
public Locations() { }
public void Add(string sSite)
{
Location loc = new Location();
loc.Site = sSite;
loc.Bldg = sBldg;
_locs.Add(loc);
}
private string _bldg = string.Empty;
public string Bldg
{
get { return _bldg; }
set { _bldg = value; }
}
}
You need to supply a useful ToString implementation for Location as Join is calling that for each element. The default implementation will just return the name of the type. See documentation.
So if you have a type like
class SomeType
{
public string FirstName { get; private set; }
public string LastName { get; private set; }
public SomeType(string first, string last)
{
FirstName = first;
LastName = last;
}
public override string ToString()
{
return string.Format("{0}, {1}", LastName, FirstName);
}
}
You need to specify how that should be represented as a string. If you do that, you can use string.Join like this to produce the output below.
var names = new List<SomeType> {
new SomeType("Homer", "Simpson"),
new SomeType("Marge", "Simpson")
};
Console.WriteLine(string.Join("\n", names));
Output:
Simpson, Homer
Simpson, Marge
You have to override ToString() inc your Location class to provide some meaningful output if you want to keep your current approach, E.g.:
public override string ToString()
{
return Site;
}
I created a local db with helper app project. and deployed it from isolate storage to installation folder,i added to project directory with content build action by add existing item. my problem is that i want to insert data, but i don't know how to move the db file to isolate storage to insert and data must add to my .sdf file that is locate in my project directory also.
Souphia,
While learning to use WP, I wrote a simple application that tracked tasks.
One version of that app stored all task data in Sql on the phone.
You can read the post and download all the code for the app here:
http://www.ritzcovan.com/2012/02/building-a-simple-windows-phone-app-part-3/
But, here is some of the code from that project:
First we have the model class decorated with the appropriate attributes:
[Table]
public class Task : INotifyPropertyChanged, INotifyPropertyChanging
{
[Column(IsDbGenerated = false, IsPrimaryKey = true, CanBeNull = false)]
public string Id
{
get { return _id; }
set
{
NotifyPropertyChanging("Id");
_id = value;
NotifyPropertyChanging("Id");
}
}
[Column]
public string Name
{
get { return _name; }
set
{
NotifyPropertyChanging("Name");
_name = value;
NotifyPropertyChanged("Name");
}
}
[Column]
public string Category
{
get { return _category; }
set
{
NotifyPropertyChanging("Category");
_category = value;
NotifyPropertyChanged("Category");
}
}
[Column]
public DateTime? DueDate
{
get { return _dueDate; }
set
{
NotifyPropertyChanging("DueDate");
_dueDate = value;
NotifyPropertyChanged("DueDate");
}
}
[Column]
public DateTime? CreateDate
{
get { return _createDate; }
set
{
NotifyPropertyChanging("CreateDate");
_createDate = value;
NotifyPropertyChanged("CreateDate");
}
}
[Column]
public bool IsComplete
{
get { return _isComplete; }
set
{
NotifyPropertyChanging("IsComplete");
_isComplete = value;
NotifyPropertyChanged("IsComplete");
}
}
[Column(IsVersion = true)] private Binary _version;
private string _id;
private bool _isComplete;
private DateTime? _createDate;
private DateTime? _dueDate;
private string _name;
private string _category;
public event PropertyChangedEventHandler PropertyChanged;
public event PropertyChangingEventHandler PropertyChanging;
public void NotifyPropertyChanged(string property)
{
if (PropertyChanged != null)
PropertyChanged(this, new PropertyChangedEventArgs(property));
}
public void NotifyPropertyChanging(string property)
{
if (PropertyChanging != null)
PropertyChanging(this, new PropertyChangingEventArgs(property));
}
}
In the constructor in app.xaml.cs, I have the following:
TaskMasterDataContext = new TaskMasterDataContext();
if (!TaskMasterDataContext.DatabaseExists())
{
TaskMasterDataContext.CreateDatabase();
DatabaseHelper.SetupDatabase(TaskMasterDataContext);
}
and here is the TaskMasterDataContext.cs code
public class TaskMasterDataContext : DataContext
{
public TaskMasterDataContext() : base("Data Source=isostore:/TaskMasterData.sdf")
{
}
public Table<Task> Tasks;
}
public static class DatabaseHelper
{
public static void SetupDatabase(TaskMasterDataContext dataContext)
{
string category = string.Empty;
var tasks = new List<Task>();
for (int i = 0; i < 20; i++)
{
tasks.Add(new Task()
{
Id = System.Guid.NewGuid().ToString(),
Category = GetCategoryString(i),
CreateDate = DateTime.Now,
DueDate = DateTime.Now.AddDays(new Random().Next(1, 30)),
IsComplete = false,
Name = String.Format("{0} Task # {1}", GetCategoryString(i), i)
});
}
dataContext.Tasks.InsertAllOnSubmit(tasks);
dataContext.SubmitChanges();
}
private static string GetCategoryString(int i)
{
if (i%2 == 0)
return "home";
if (i%3 == 0)
return "personal";
return "work";
}
}
The DatabaseHelper class is just there to populate the DB with some test data after its created.
I hope this helps.