public myTestClass deepCopy()
{
myTestClass tempObject = new myTestClass(); //composes a new instance of object from myTestClass
tempObject.irTestVal = this.irTestVal; //value type
tempObject.srName = this.srName; //immutable
tempObject.srLocation = this.srLocation; //immutable
tempObject.lstCollection = this.lstCollection.ToList(); //i am making a deep copy here with ToList method call
return(tempObject);
}
private void btnShallowCloning_Click(object sender, RoutedEventArgs e)
{
List <int> lstSecondList = lstMyMainList;
lstSecondList[2] = 400;
//the below foreaches are equal, therefore they will throw error
//collection is modified during enumaration error
//foreach (var vrSecondList in lstSecondList)
//{
// lstMyMainList.Add(vrSecondList);
//}
//foreach (var vrSecondList in lstMyMainList)
//{
// lstMyMainList.Add(vrSecondList);
//}
//when assign reference type objects it just copies their address
//any changes on them modified the same data
myTestClass test = new myTestClass();
test.irTestVal = 100;
myTestClass test2 = test;
test2.irTestVal = 200;
//now both test and test2 irTestVal is 200
int ir1 = 100;
int ir2 = ir1;
ir1 = 200;
//now ir1 = 200 and ir2= 100 because these are value types
string sr1 = "hello world";
string sr2 = sr1;
sr1 = "hello home";
//now sr1 is hello home and sr2 is hello world
//string is only exception of shallow copy of class type
//because
//Strings in C# are immutable; that means they cannot change. When you say s = "hello home" you are creating a new string and assigning its reference to sr1; this does not affect the reference saved to sr2 which still points to the original string.
//since string is immutable, whenever you concatenate a string, it composes a new string. therefore, for long strings you should use stringbuilder
}
private void btnDeepCopy_Click(object sender, RoutedEventArgs e)
{
List <int> lstSecondList = lstMyMainList.ToList();
lstSecondList[2] = 400;
//this will work since they are different lists now
foreach (var vrSecondList in lstSecondList)
{
lstMyMainList.Add(vrSecondList);
}
myTestClass myDefaultTestClass = new myTestClass();
myTestClass myTest2 = new myTestClass
{
irTestVal = 250,
lstCollection = new List <int> {
500, 1000, 10
},
srLocation = "Turkey",
srName = "Toros University"
};
//how can i make a deep copy of myTest2 into myDefaultTestClass??
myDefaultTestClass = myTest2;// how it copies? this is only shallow cloning
myDefaultTestClass.lstCollection[2] = 1;
myTest2.lstCollection[1] = 3;
myDefaultTestClass.srLocation = "default location of myDefaultTestClass";
myTest2.srLocation = "default location of myTest2";
myDefaultTestClass = myTest2.deepCopy();
myDefaultTestClass.lstCollection[2] = 800;
myTest2.lstCollection[1] = 5000;
myDefaultTestClass.srLocation = "new location of myDefaultTestClass";
myTest2.srLocation = "great location of myTest2";
myTestClass test3 = myTest2.DeepClone();
myTest2.lstCollection[2] = 1800;
test3.lstCollection[1] = 15000;
myTest2.srLocation = "awesome location of myDefaultTestClass";
myTest2.srLocation = "super location of myTest2";
}
