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What is the difference between the Clone() and Copy() methods of the DataSet class?

Posted By :Swati Kadam     Posted Date :September 17, 2014    Points :40   Category :ADO.Net 
The Clone() method copies only the structure of a DataSet. The copied structure includes all the relation, constraint, and DataTable schemas used by the DataSet. The Clone() method does not copy the data, which is stored in the DataSet.

The Copy() method copies the structure as well as the data stored in the DataSet.

You can also find related Interview Question to What is the difference between the Clone() and Copy() methods of the DataSet class?  below: 

Difference Between Dataset.Clone() and Dataset.Copy() ?

  
DataSet.Clone()--Reflects Only Schema to The Dataset


DataSet.Copy()--Retrives total Records to Dataset (More...)

What is the main difference between DataSet.Clone() and DataSet.Copy() ?

  
Generally

DataSet.Clone() would copy only the schema of the DataSet object and it would return the DataSet object that has same struture that the previous dataset object which includes all the relations, constraints and schemas as well. This will not copy the data from the existing one to new one.

The existing Dataset ---

private DataSet CreateMyClone(DataSet myCloneDataSet)

{

DataSet exampleCloneDS;

exampleCloneDS = myCloneDataSet.Clone();

return exampleCloneDS;

}




DataSet.Copy() will copy complete code as well as the structure of the existing DataSet object. (More...)

What is difference between Dataset.clone and Dataset.copy?

  
Dataset.Clone- It only copies structure, does not copy data.
Dataset.Copy - Copies both structure and data. (More...)

Difference between DataSet Clone and DataSet Copy?

  
DataSet.Clone() - It only copies the structure but doesnot Copies the Data;
Dataset.Copy() - It copies both Structure and data..
(More...)

What is the differences between dataset.clone and dataset.copy?

  
Dataset.clone copies just the structure of dataset (including all the datatables, schemas, relations and constraints.); however it doesn't copy the data.
Dataset.copy, copies both the dataset structure and the data.
(More...)

What is the differences between dataset.clone and dataset.copy?

  
What is the differences between dataset.clone and dataset.copy? (More...)

What is the difference between a Struct and a Class?

  
The struct type is suitable for representing lightweight objects such as Point, Rectangle, and Color. Although it is possible to represent a point as a class, a struct is more efficient in some scenarios. For example, if you declare an array of 1000 Point objects, you will allocate additional memory for referencing each object. In this case, the struct is less expensive.

When you create a struct object using the new operator, it gets created and the appropriate constructor is called. Unlike classes, structs can be instantiated without using the new operator. If you do not use new, the fields will remain unassigned and the object cannot be used until all of the fields are initialized.

It is an error to declare a default (parameterless) constructor for a struct. A default constructor is always provided to initialize the struct members to their default values.

It is an error to initialize an instance field in a struct.

There is no inheritance for structs as there is for classes. A struct cannot inherit from another struct or class, and it cannot be the base of a class. Structs, however, inherit from the base class Object. A struct can implement interfaces, and it does that exactly as classes do.

A struct is a value type, while a class is a reference type. (More...)

What is the difference between interface and abstract class ?

  
a class may inherit several interfaces, a class may inherit only one abstract class (More...)

What is the difference between Data Reader & Dataset?

  
Data Reader is connected datasource, read only, forward only record set.

Dataset is disconnected datatsource resides in memory database that can store multiple tables, relations and constraints; (More...)

What is difference between interface inheritance and class inheritance?

  
We can only inherit from one class but multiple interfaces. In addition, an interface does not contain any implementation it just contains a series of signatures. (More...)

Difference between Dataset and Datareader?

  
Data Set is a connectionless service and Data reader is a connection oriented service. Dataset is used to store the data, it contains collections of Datatable. Datareader is used to connect to the database for retrieving data.
Data Reader - Forward only where as Dataset - Can loop through dataset.
Data Reader - Connected Recordset where as DataSet - Disconnected Recordset
Data Reader - Less Memory Occupying where as DataSet - It occupies more memory
Data Reader - Only Single Table can be used where as Dataset - Datatable Concept allows data to be stored in multiple tables.
Data Reader - Read only where as DataSet - Can add/update/delete using the dataset
Data Reader - No relationship can be maintained where as DataSet - Relationship can be maintained.
Data Reader - No Xml Storage available where as DataSet - Can be stored as XML.
The Dataset is a core of disconnected architecture. Disconnected architecture means once you have retrieved the data from the database the data source is dropped. The disconnected data become very commonly. The dataset for the disconnected data from the Dataset object. The DataReader is a readonly, forward only stream from the database. While using the datareader can improve the application performance reduces the system overhead because only one buffer row at a time in memory.


Shashi Ray (More...)

What is difference between abstract class and an interface?

  
An Abstract class is a class with some common/certain implementations and defines abstraction for other services which are implemented in its concrete sub classes, whereas interface only have method declaration with zero implementations. An abstract class and Interface both have method only but not have body of method. The difference between Abstract class and An Interface is that if u call Abstract class then u have to call all method of that particular Abstract class but if u call an Interface then it is not necessary that u call all method of that particular interface. An abstract class is a special kind of class that cannot be instantiated. So the question is why we need a class that cannot be instantiated? An abstract class is only to be sub-classed (inherited from). In other words, it only allows other classes to inherit from it but cannot be instantiated. The advantage is that it enforces certain hierarchies for all the subclasses. In simple words, it is a kind of contract that forces all the subclasses to carry on the same hierarchies or standards.

An interface is not a class. It is an entity that is defined by the word Interface. An interface has no implementation; it only has the signature or in other words, just the definition of the methods without the body. As one of the similarities to Abstract class, it is a contract that is used to define hierarchies for all subclasses or it defines specific set of methods and their arguments. The main difference between them is that a class can implement more than one interface but can only inherit from one abstract class. Since C# doesn't support multiple inheritance, interfaces are used to implement multiple inheritance.


Shashi Ray (More...)

Difference Between GET and POST methods in HTML

  
Difference Between GET and POST methods

GET:
1) Data is appended to the URL.
2) Data is not secret.
3) It is a single call system
4) Maximum data that can be sent is 256.
5) Data transmission is faster
6) This is the default method for many browsers

POST:
1) Data is appended to the URL.
2) Data is Secret
3) It is a two call system.
4) There is no Limit on the amount of data.That is characters any amount of data can be sent.
5) Data transmission is comparatively slow.
6) No default and should be Explicitly specified. (More...)

What's the difference between the System.Array.CopyTo() and System.Array.Clone() in c#?

  
The first one performs a deep copy of the array, the second one is shallow. (More...)

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