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C# Error - Overload for method
I took a button in form.I have two classes emp and bonus.bonus class is inherited from emp class.If bonus is giving ie in dialog box if we select ‘Yes’ b ie bonus is added to sal and we get ts ie total sal along with eno.If bonus is not given ie in dialog box if we select ‘No’ we need to get only sal along with eno.The following pgm is working fine.class emp { private int...
bhanu supriya
- Jul 19th, 2010
Here you are passing parameters to the class itself...You have to pass the parameters to method.
sudhakarr.net
- Jul 11th, 2008
Hi aarruunnaa,You try this code, if it is useful for you send me reply otherwise ask me again dont hesitate class emp {public int eno,sal; public emp(){}public emp(int eno,int sal) {this.eno=eno;...
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Unsafe Keyword
Why we use pointer in C#.NET with Unsafe keyword?
phanish
- Jul 16th, 2010
In C# the value can be directly referenced to a variable, so there is no need of pointer. Use of pointer sometime crashes the application. But C# supports pointer, that means we can use pointer in C#....
kvvsmbalaji
- Jul 16th, 2010
As we know, the CLR is responsible for managing the execution of code compiled for the .NET platform. The code that satisfies the CLR at runtime in order to execute is reffered as Managed Code.Un...
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Can you prevent your class from being inherited and becoming a base class for some other classes?
Yes, that is what keyword sealed in the class definition is for. The developer trying to derive from your class will get a message: cannot inherit from Sealed class WhateverBaseClassName. It is the same concept as final class in Java.
sabir
- Jan 6th, 2006
Can be done by using the keyword "not inhertitable "syntax is not inheritable class '''''''''''''''codeend class
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What is page life cycle in c#.net
kirangiet
- Jun 8th, 2010
Following are the events occur during ASP.NET Page Life Cycle:1) Page_PreInit2) Page_Init3) Page_InitComplete4) Page_PreLoad5) Page_Load6) Control Events7) Page_LoadComplete8) Page_PreRender9) SaveVie...
sd.rawat
- Dec 29th, 2009
There are 10 different stages and methods in page life cycle Stage - Method 1) Page Initialization - Page_Init 2) View State Loading - LoadViewState 3) PostBack data processing - LoadPostData 4) Page ...
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C# Serializable Keyword
What is the use of serializable keyword in C#?
kirangiet
- Jun 8th, 2010
We usually serialize the object, which we are transferring across processes.Example: When we are using Out Proc session Management we should add the serializable attribute at the top of the class.e.g.[Serializable]public Class Employee{public string Name;public int Age;}
azita2005
- Apr 6th, 2010
Serialization is the process of taking an object and convert it to a format that can be transmitted over the network or save in database or store in the file.Objects may be serialized in three fo...
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Assembly version information is stored in the:
Skill/Topic: AdvancedA) ManifestB) Garbage CollectorC) Heap
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Which of the following is wrong with regards to Out keyword
A) For Out parameters a variable can be passed which has not initializedB) If Out parameters are not assigned a value with in the function body compiler throws errorC) The variable passed as a Out parameter must be static
Sanjida123
- Jun 4th, 2010
Let's see what is out? Out is a keyword used to fill value to the parameter named as out.A) For Out parameters a variable can be passed which has not initialized - TrueWe can pass an uninitializ...
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If we need to compare X to a value 3 how do we do it in C#
A) If (X==3)B) If (X=3)C) If (X.equals(3) )
Aby Kurian
- Jan 29th, 2007
If x is an integer then
if (x==3){your code}
if x is string the convert value to integer then apply this code -
Which keyword is used of specify a class that cannot inherit by other class
Sanjida123
- Jun 4th, 2010
Sealed is the keyword that says the specific class cannot be inherited by another class.
nagarjuna
- Jul 5th, 2006
By using "sealed" keyword we can restrict a class from inheritence. Please reply me if it is wrong!
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What is ref parameter?What is Out parameter?What's the difference between these two?
Kuldeep Shishodia
- May 25th, 2010
Ref parameter are basically use to pass the variable as a reference to a function.OUT Parameter are used to send back the result to a calling function.
Sachin
- Aug 6th, 2007
Oops...The difference is that for a ref parameter, you have to assign a value before you call the function, while for OUT parameter, you dont have to assign a value, the calling function assumes that the called function would assign some value.
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Uses of delegates
What is a delegate in C# and when are they commonly used in Windows Forms programming?
hdkhanna
- May 18th, 2010
Delegates are an efficient way of calling methods dynamically in C#. As long as the signature of the method called is the same as the delegate type defined it can be called. This is one way a method c...
asifdcsku
- Sep 12th, 2008
Delegeates are reference to methods Delegates are most commonly used in event handling.
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How to Do File Exception Handaling in C#
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Can you store multiple data types in System.Array?
No.
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Postbackurl and Navigateurl
What is difference between "Session" and "Session" Objects? What is the use of "postbackurl" and "navigateurl" and the differences between those two things?
azita2005
- Apr 6th, 2010
With PostbackUrl you can perform the cross page posting and you can get information from the source page. It is working with Http Post command which sends the value of the source page to the target pa...
csharpkate
- Mar 9th, 2010
The PostBackUrl property allows you to perform a cross-page post using the button control. Postbackurl can be set so that the values like those on a form, can be passed onto another page. For example ...
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Explicit Implimentation
What do you mean by Explicit Interface Implimentation? What's Interface Mapping?
azita2005
- Apr 5th, 2010
If we have a class inherits from interface, we need to implements the members of that interface. It is possibe with explicitly or implicitly way. In Explicit way, through the interface we ...
RajMarandi
- Oct 23rd, 2009
interface I1{ void someMethod();}Interface I1{ void someMethod();} class someClass:I1,I2{ void I1.someMethod() { ...
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AutoPostBack Property
There is Cancel button and OK button on page. When we click Cancel button it skips all validation controls and goes to next page.(a)Page AutoPostback of Cancel is True.(b)Page AutoPostback of Cancel is False.(c)Page AutoPostback of OK is True.(d)Page AutoPostback of OK is False.Which option is correct?
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Editorial / Best Answer
solanki.hr- Member Since Dec-2009 | Dec 10th, 2009
A button control does not have AutoPostBack property it has click event. so once you click on cancel and if its CausesValidation Property is false it will skips all validations, and if it is true it will validate the controls on the page.
AutoPostBack property is for say DropDown,textbox etc... whnever you change/enter value/keyed some caharcter in textbox or change your selection in drop down postback will happen if that control's is AutoPostBack property is true, depending on that postback you can fill values or set some values for other controls or you can do some validation against enterd or selcted values.
e.g. say tehre are 2 drop down. DropDown1 and DropDown2
DropDown2 is currently holding states of US country as in DropDown1 you have selcted US. Now you want to fill DropDown2 with state value of India.
Now if
DropDown1.AutopostBack = True;
and you change DropDown1's value from Us to India.
Page will post back to server and you can fill DropDown2 with Indian States.
Thanks,
Solankiazita2005
- Apr 1st, 2010
By default when we press the button, validation automatically occurs.With using causevalidation=false we can prevent validation.
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Public Members
Why do we use properties rather than public members?
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Editorial / Best Answer
netdev- Member Since Oct-2009 | Oct 10th, 2009
To the user of an object, property and public member may not make much difference with respect to syntax. However, property provides the ability to combine both field and method via the get and set accessors.
MS Help for C# presents the best answer for using properties:Properties have many uses: they can validate data before allowing a change; they can transparently expose data on a class where that data is actually retrieved from some other source, such as a database; they can take an action when data is changed, such as raising an event, or changing the value of other fields.
ms-help://MS.VSCC.v90/MS.MSDNQTR.v90.en/dv_csref/html/f7f67b05-0983-4cdb-96af-1855d24c967c.htmazita2005
- Apr 1st, 2010
With Properties, we can implement validation.For example, if we have customer age and we want to add validation on the age, we can do it with properties.Another benefits of properties is that we can protect a field in a class by reading and writing it through the properties.
SeeSharp
- Mar 7th, 2010
Private data fields of class should not be exposed by making them public. Instead they can made visible using public properties in more controlled manner. Also we can make properties read only or read/write.
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How to get the capacity of an array in C#
A) Count PropertyB) Length PropertyC) Ubound method
abhi.uno
- Mar 17th, 2010
".Length" for total no elements in all dimensions.".getlength(int x)" gets total elements in dimension x(int)
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What is a read only object? e. g.static readonly object padlock = new object();
sbehera02
- Dec 14th, 2006
A read only member is like a constant in that it represents an unchanging value. The difference is that a readonly member can be initialized at runtime, in a constructor as well being able to be initi...
C# Interview Questions
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