Session.Abandon()
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Daily Tips- Tip #4 - How will you kill a user's session variable explicitly?
Wednesday, July 8, 2009
What area the differences between Global.asax and Web.Config?
| Sno | global.asax | web.config |
| 1 | Class File | Its an XML file |
| 2 | There can be only one for an application | there can be many if under different sub-folders |
| 3 | Can have Application and Session events | Can't |
| 4 | Need to be recompiled when changes are made | No need to compile when changes are made. |
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What are test cases you should go through in unit testing?
You need to check 3 test cases, which are the following,
1. Positive test cases (correct data, correct output)
2. Negative test cases (broken or missing data, proper handling)
3. Exception test cases (exceptions are thrown and caught properly)
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What are the different Debugging tools which come with .NET ?
Two debugging tools come with .NET, they are :
1. CorDBG
– command-line debugger
2. DbgCLR – graphic debugger.
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What are the differences between const and readonly ?
| Sno | const | readonly |
| 1 | Can't be static. | Can be instance level or static |
| 2 | evaluated at design time | evaluated at run time |
| 3 | Initialized at declaration | Initialized at declaration and in constructor |
| 4 | must be of integral type or enumeration | In addition it can have complex types with new keyword and enumerations are not allowed |
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How can you tell the application to look for assemblies at the locations other than its installed location?
You can do that by adding the following entry in the web.config file,
<probing privatePath="c:\yourlibrary; bin\debug" />
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<probing privatePath="c:\yourlibrary; bin\debug" />
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What’s the difference between authentication and authorization?
what is Authentication?
Is a process by which the system decides whether the user is valid to login to the site as a whole.
what is Authorization?
Is a process by which the system decides which are the areas and functionalities the user is allowed to access, at the component level.
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Is a process by which the system decides whether the user is valid to login to the site as a whole.
what is Authorization?
Is a process by which the system decides which are the areas and functionalities the user is allowed to access, at the component level.
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How to download webpage using asp.net and c# ?
See the following code,
using System;
using System.Collections.Generic;
using System.Text;
using System.IO;
using System.Net;
namespace DownloadingFile
{
class Program
{
static void Main(string[] args)
{
WebRequest reqFile = WebRequest.Create("http://www.codecollege.net/2009/07/cloud-computing.html");
WebResponse resFile = reqFile.GetResponse();
Stream smFile = resFile.GetResponseStream();
// Output the downloaded stream to the console
StreamReader sr = new StreamReader(smFile);
string line;
while ((line = sr.ReadLine()) != null)
Console.WriteLine(line);
Console.Read();
}
}
}
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using System;
using System.Collections.Generic;
using System.Text;
using System.IO;
using System.Net;
namespace DownloadingFile
{
class Program
{
static void Main(string[] args)
{
WebRequest reqFile = WebRequest.Create("http://www.codecollege.net/2009/07/cloud-computing.html");
WebResponse resFile = reqFile.GetResponse();
Stream smFile = resFile.GetResponseStream();
// Output the downloaded stream to the console
StreamReader sr = new StreamReader(smFile);
string line;
while ((line = sr.ReadLine()) != null)
Console.WriteLine(line);
Console.Read();
}
}
}
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How to read and write from a text file using c#.net ?
See the following sample,
using System;
using System.Collections.Generic;
using System.Text;
using System.IO;
namespace ReadWriteFromTxt
{
class Program
{
static void readFile()
{
FileStream fsEmp = new FileStream("c:\\Emp.html", FileMode.Open, FileAccess.Read);
StreamReader srEmp = new StreamReader(fsEmp);
string s;
while ((s = srEmp.ReadLine()) != null)
{
Console.WriteLine(s);
Console.Read();
}
srEmp.Close();
fsEmp.Close();
}
static void writeFile()
{
FileStream fsEmp = new FileStream("c:\\Emp.html", FileMode.Open, FileAccess.Write );
StreamWriter swEmp = new StreamWriter(fsEmp );
string s="Have you seen god? Is there anything else to see";
swEmp.WriteLine(s);
swEmp.Close();
fsEmp.Close();
}
static void Main(string[] args)
{
writeFile();
readFile();
}
}
}
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using System;
using System.Collections.Generic;
using System.Text;
using System.IO;
namespace ReadWriteFromTxt
{
class Program
{
static void readFile()
{
FileStream fsEmp = new FileStream("c:\\Emp.html", FileMode.Open, FileAccess.Read);
StreamReader srEmp = new StreamReader(fsEmp);
string s;
while ((s = srEmp.ReadLine()) != null)
{
Console.WriteLine(s);
Console.Read();
}
srEmp.Close();
fsEmp.Close();
}
static void writeFile()
{
FileStream fsEmp = new FileStream("c:\\Emp.html", FileMode.Open, FileAccess.Write );
StreamWriter swEmp = new StreamWriter(fsEmp );
string s="Have you seen god? Is there anything else to see";
swEmp.WriteLine(s);
swEmp.Close();
fsEmp.Close();
}
static void Main(string[] args)
{
writeFile();
readFile();
}
}
}
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what are the Differences between Abstract Class and Interface ?
| Sno | Abstract Class | Interface |
| 1 | Can have implemented Methods | Cant |
| 2 | A class can inherit only one abstract class | A Class can implement any number of Interfaces. |
| 3 | We go for Abstract classes on such situations where we need to give common functionality for group of related classes | We go for Interface on such situations where we need to give common functionality for group of un-related classes |
| 4 | If you add a new method, then you can provide a default implementation and so no need to make any change to existing work. | If you add a new method, then you need to change all the existing work. |
| 5 | Static and Instance constants are possible. | Only Static constants are possible. |
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