CODEWITHSUNDEEP
c#.net
Konstantin Dinev
Konstantin Dinev

Reputation: 34895

Accessing through this within a class

Inside my .NET classes I access my properties and members through this. What is the difference if I access them without using this.

public class Test
{
    private string _test;

    public Test()
    {
        this.Test = "test";
        // vs. 
        Test = "test";

        // and
        this._test = "test";
        // vs. 
        _test = "test";
    }

    public string Test { get; set; }
}

Upvotes: 3

Views: 83

Answers (8)

Soner Gönül
Soner Gönül

Reputation: 98740

There's no difference for the compiler. Use which is more readable for you.

public class Test 
{ 

private string _test;

public Test(string Test)
{
    this.Test = "test";
    // vs. 
    Test = "test";

    // and
    this._test = "test";
    // vs. 
    _test = "test";
}

  public string Test { get; set; }
}

Upvotes: 0

JGaarsdal
JGaarsdal

Reputation: 241

Check out the msdn page: http://msdn.microsoft.com/en-us/library/dk1507sz(v=vs.80).aspx

In C# this is primarily used to increase readability when you have variables and parameters with the same name.

Upvotes: 0

mcalex
mcalex

Reputation: 6778

This is just referring to the class's variable. It saves you from being tripped up when you try:

private string Test;

public Test(String Test)
{
    this.Test = Test;
    // vs. 
    Test = Test;

}

The first one will work correctly.

Upvotes: 2

Pranay Rana
Pranay Rana

Reputation: 176896

this doent make any difference till you have parameter with same name liekt his 

public class Test
{
 private string _test;

 public Test(string Test,string _test)
 {
    this.Test = "test";//this refers invoking object Test i.e class varaible
    // vs. 
    Test = "test";//this refer method passed Test param

    // and
    this._test = "test";//this refers invoking object Test i.e class varaible
    // vs. 
    _test = "test";//this refer method passed Test param
}

  public string Test { get; set; }
}

so in above case method parameter Test hide class Test prameter , to avoid this you need to use this to refer current object of class

Upvotes: 1

Ash Burlaczenko
Ash Burlaczenko

Reputation: 25435

There is no difference, whether you use this or not. It's just about readability.

Upvotes: 0

Justin Harvey
Justin Harvey

Reputation: 14672

There is no difference in terms of the end result.

One thing is that typing this will give you intellisense that lists only member available within that class.

Also, if the method is an extension method on the class, then you will need to use this to call it.

Upvotes: 0

Tim Schmelter
Tim Schmelter

Reputation: 460058

There's no difference for the compiler at all. Use whatever is more readable. I prefer using this to show that this is a field/property instead of a local variable.

Upvotes: 2

ie.
ie.

Reputation: 6101

There is no difference in your code, but sometimes this helps you to specify the scope.

public Test(string _test)
{
    this._test = "test"; // sets class field
    // vs. 
    _test = "test"; // sets ctor parameter
}

Upvotes: 0

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