In this series I answer various .NET questions. Some of them are asked during interviews, some of them I see on the internet, some of them are completely made up. The goal is to provide short answer with links to references if needed. This is by no means a .NET tutorial or experts reference, this is just a bunch of useful answers to refresh your knowledge.
تلاشهایی به صورت مستقل برای جاوا هم شده (یکپارچه با زبان نیست)
http://xircles.codehaus.org/projects/quaere
اما باز هم پیاده سازی آن در بسیاری از موارد type safety دات نت را ندارد و از رشتهها کمک گرفته.
در کل جاوا به دلیل نداشتن معادلی برای lambda expressions که پایه و اساس LINQ را تشکیل میدهد، هنوز در این زمینه کار پایهای را انجام نداده است و در کل قسمت LI مربوط به LINQ را ندارد (language integrated)
آشنایی با IBM Swift Sandbox
معرفی SharePoint Framework
کتابخانه stimed
STIMED.js is a jQuery plugin for controlling CSS styles over time. There are almost endless possibilities for using timed CSS properties. You could change webpage colors to make them more calm at night and more contrast during daytime, or hide a specific element in a certain time, or just move an element in sync with time... Demo
Unhandled exceptions are a bit of a misnomer. In .NET, every exception is handled. By the time you access the specifics of an error in your Try-Catch block, the Framework has already analyzed the problem, built a structure to contain its details, examined the stack trace, and used reflection to pinpoint the location of the error, among other mundane tasks. In short, when errors occur, .NET serves them up to your code in a neatly packaged, highly examinable data block.
مطابق Ajax API ترجمه گوگل، برای ترجمه یک متن باید محتویات آدرس زیر را تحلیل کرد:
http://ajax.googleapis.com/ajax/services/language/translate?v=1.0&q={0}&langpair={1}|{2}
بنابراین برای استفاده از آن تنها کافی است این URL را تشکیل داده و سپس محتویات خروجی آنرا آنالیز کرد. فرمت نهایی دریافت شده از نوع JSON است. برای مثال اگر hello world! را به این سرویس ارسال نمائیم، خروجی نهایی JSON دریافت شده به صورت زیر خواهد بود:
//{\"responseData\": {\"translatedText\":\"سلام جهان!\"}, \"responseDetails\": null, \"responseStatus\": 200}
در کتابخانهی System.Web.Extensions.dll دات نت فریم ورک سه و نیم، کلاس JavaScriptSerializer برای این منظور پیش بینی شده است. تنها کافی است به متد Deserialize آن، متن JSON دریافتی را پاس کنیم:
GoogleAjaxResponse result =
new JavaScriptSerializer().Deserialize<GoogleAjaxResponse>(jsonGoogleAjaxResponse);
برای اینکه عملیات نگاشت اطلاعات متنی JSON به کلاسهای دات نتی ما با موفقیت صورت گیرد، میتوان خروجی JSON گوگل را به شکل زیر نمایش داد:
//ResponseData.cs file
public class ResponseData
{
public string translatedText { get; set; }
}
//GoogleAjaxResponse.cs file
using System.Net;
/// <summary>
/// کلاسی جهت نگاشت اطلاعات جی سون دریافتی به آن
/// </summary>
public class GoogleAjaxResponse
{
public ResponseData responseData { get; set; }
public object responseDetails { get; set; }
public HttpStatusCode responseStatus { get; set; }
}
using System;
using System.Globalization;
using System.IO;
using System.Net;
using System.Web;
using System.Web.Script.Serialization;
//{\"responseData\": {\"translatedText\":\"سلام جهان!\"}, \"responseDetails\": null, \"responseStatus\": 200}
public class CGoogleTranslator
{
#region Fields (1)
/// <summary>
/// ارجاع دهنده
/// </summary>
private readonly string _referrer;
#endregion Fields
#region Constructors (1)
/// <summary>
/// مطابق مستندات نیاز به یک ارجاع دهنده اجباری میباشد
/// </summary>
/// <param name="referrer"></param>
public CGoogleTranslator(string referrer)
{
_referrer = referrer;
}
#endregion Constructors
#region Properties (2)
/// <summary>
/// ترجمه از زبان
/// </summary>
public CultureInfo FromLanguage { get; set; }
/// <summary>
/// ترجمه به زبان
/// </summary>
public CultureInfo ToLanguage { get; set; }
#endregion Properties
#region Methods (2)
// Public Methods (1)
/// <summary>
/// ترجمه متن با استفاده از موتور ترجمه گوگل
/// </summary>
/// <param name="data"></param>
/// <returns></returns>
public string TranslateText(string data)
{
//ساخت و انکدینگ آدرس مورد نظر
string url =
string.Format(
"http://ajax.googleapis.com/ajax/services/language/translate?v=1.0&q={0}&langpair={1}|{2}",
HttpUtility.UrlEncode(data), //needs a ref. to System.Web.dll
FromLanguage.TwoLetterISOLanguageName,
ToLanguage.TwoLetterISOLanguageName
);
//دریافت اطلاعات جی سون از گوگل
string jsonGoogleAjaxResponse = fetchWebPage(url);
//needs a ref. to System.Web.Extensions.dll
//نگاشت اطلاعات جی سون دریافت شده به کلاس مرتبط
GoogleAjaxResponse result =
new JavaScriptSerializer().Deserialize<GoogleAjaxResponse>(jsonGoogleAjaxResponse);
if (result != null && result.responseData != null && result.responseStatus == HttpStatusCode.OK)
{
return result.responseData.translatedText;
}
return string.Empty;
}
// Private Methods (1)
/// <summary>
/// دریافت محتویات جی سون بازگشتی از گوگل
/// </summary>
/// <param name="url"></param>
/// <returns></returns>
string fetchWebPage(string url)
{
try
{
var uri = new Uri(url);
if (uri.Scheme == Uri.UriSchemeHttp || uri.Scheme == Uri.UriSchemeHttps)
{
var request = WebRequest.Create(uri) as HttpWebRequest;
if (request != null)
{
request.Method = WebRequestMethods.Http.Get;
request.Referer = _referrer;
request.UserAgent = "Mozilla/5.0 (Windows; U; Windows NT 5.0; ; rv:1.8.0.7) Gecko/20060917 Firefox/1.9.0.1";
request.AllowAutoRedirect = true;
request.Timeout = 1000 * 300;
request.KeepAlive = false;
request.ReadWriteTimeout = 1000 * 300;
request.AutomaticDecompression = DecompressionMethods.GZip | DecompressionMethods.Deflate;
using (var response = request.GetResponse() as HttpWebResponse)
{
if (response != null)
{
using (var reader = new StreamReader(response.GetResponseStream()))
{
return reader.ReadToEnd().Trim();
}
}
}
}
}
return string.Empty;
}
catch (Exception ex)
{
Console.WriteLine(String.Format("fetchWebPage: {0} >> {1}", ex.Message, url), true);
return string.Empty;
}
}
#endregion Methods
}
string res = new CGoogleTranslator("https://www.dntips.ir/")
{
FromLanguage = CultureInfo.GetCultureInfo("en-US"),
ToLanguage = CultureInfo.GetCultureInfo("fa-IR")
}.TranslateText("Hello world!");
Data architecture is an area in which the optimal degree of isolation for a SaaS application can vary significantly depending on technical and business considerations. Experienced data architects are used to considering a broad spectrum of choices when designing an architecture to meet a specific set of challenges, and SaaS is certainly no exception. We shall examine three broad approaches, each of which lies at a different location in the continuum between isolation and sharing
FirstName
firstName
strFirstName lblFirstName
<Company>.<Technology|Produt|Project>[.<Feature>][.<SubNamespace>]
Microsoft.Reporting.WebForms Kara.Support.Manager.Enums Kara.CSS.HQ.WebUI.Configuration
PackageManager , PacakgeConfigGenerator Circle , Utility , Package
CreateConfig , classdata CManager , ClsPackage , Config_Creator , Config1389
CenterCollection , PackageCollection
public delegate void Logger (string log); public delegate void LoggingCallback (object sender, string reason);
AddEventArgs , EditEventArgs , DeleteEventArgs
Adding , Add , Added
public delegate void <EventName>EventHandler (object sender, <EventName>EventArgs e);
public event EventHandler <AddEventArgs> Adding;
DisplayNameAttribute , MessageTypeAttribute
IComponent (اسم) IConnectionProvider (موصوف) ICloneable (صفت)
public enum FileMode { Append, Read, … }
[Flag] public enum KeyModifiers { Alt = 1, Control = 2, Shift = 4 }
public enum OperationState { DoneState, FaultState, RollbackState }
AddDays , Save , DeleteRow , BindData , Close , Open
Radius , ReportType , DataSource , Mode , CurrentCenterId
public CenterCollection Centers { get; set; }
if (list.Contains(item)) if (regularExpression.Matches(text)) if (stream.CanSeek) if (context.Created) if (form.Enabled)
if (list.IsContains(item)) if (regularExpression.Match(text)) if (stream.Seekable) if (context.IsCreated) if (form.IsEnabled)
public Color Color { get; set; }
firstName , e , id , packageId , centerName , name
public static MyType operator +(MyType left, MyType right) public static bool operator ==(MyType left, MyType right)
public static MyType operator ++(MyType value)
public static MyType operator /(MyType dividend, MyType divisor)
public static MyType operator -(MyType d1, MyType d2) // incorrect!
Area , DataBinder , PublicCacheName
_centersList _firstName _currentCenter
parameterType , packageOperationTypeId
lblName (Label) txtHeader (TextBox) btnSave (Button)
ArgumentNullException , InvalidOperaionException
System.Data
<Company>.<Component>.dll <Company>.<Project|Product|Technology>.<Component>.dll
Microsoft.CSharp.dll , Kara.CSS.Manager.dll
public int IComparer<T> {…} public delegate bool Predicate<T> (T item)
public int ISessionChannel<TSession> {…} public delegate TOutput Converter<TInput, TOutput> (TInput from) public class Nullable<T> {…} public class List<T> {…}
ArgumentExceptionIllegalCharacters ArgumentExceptionInvalidName ArgumentExceptionFileNotFound
Pascal Casing |
camel Casing |
Wrong |
Callback |
callback |
CallBack |
BitFlag |
bitFlag |
Bitflag / bitflag |
Canceled |
canceled |
Cancelled |
DoNot |
doNot |
Donot / Don’t |
|
|
|
Endpoint |
endpoint |
EndPoint / endPoint |
FileName |
fileName |
Filename / filename |
Gridline |
gridline |
GridLine / gridLine |
Hashtable |
hashtable |
HashTable / hashTable |
Id |
id |
ID |
Indexes |
indexes |
Indices |
LogOff |
logOff |
Logoff / LogOut ! |
LogOn |
logOn |
Logon / LogIn ! |
SignOut |
signOut |
Signout / SignOff |
SignIn |
signIn |
Signin / SignOn |
Metadata |
metadata |
MetaData / metaData |
Multipanel |
multipanel |
MultiPanel / multiPanel |
Multiview |
multiview |
MultiView / multiView |
Namespace |
namespace |
NameSpace / nameSpace |
Ok |
ok |
OK |
Pi |
pi |
PI |
Placeholder |
placeholder |
PlaceHolder / placeHolder |
UserName |
username |
Username / username |
WhiteSpace |
whiteSpace |
Whitespace / whitespace |
Writable |
writable |
Writeable / writeable |
public class Color { … public static Color FromArgb(…) { … } }