How to use Default Parameter on methods.

Posted by Tripati.patro under C# category on 2/21/2011 | Points: 40 | Views : 3085

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Default parameter is supported in .Net 4.0 only

private void UseDefaultValue()
{
    DefalutValueMethod("Codes");
    DefalutValueMethod("Interviews");
    // Access the method without passing any value.
    DefalutValueMethod();
}

/// <summary>
/// Method to show a message with a default parameter.
/// Supported in .Net 4.0 only
/// </summary>
/// <param name="sectionType"></param>
private void DefalutValueMethod(string sectionType = "Articles")
{
    MessageBox.Show(string.Format("DotNetFunda includes: {0} section.", sectionType);
}

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Comments or Responses

Posted by: T.saravanan on: 2/22/2011 Level:Silver | Status: [Member] [MVP] | Points: 10

Hi B.Tripati Patro,

its really Nice one...
Sorry for the disturbance...
I am working in 3.5 framework.So i am not check my doubt in this framework.
If i am using Method Overloading concept in your above code means which method access if i call DefalutValueMethod() ...
For example...

private void UseDefaultValue()

{

    DefalutValueMethod("Codes");      

    DefalutValueMethod();

}

private void DefalutValueMethod()

{ 

   MessageBox.Show("No Parameter");

}

private void DefalutValueMethod(string sectionType = "Articles")

{

    MessageBox.Show(string.Format("DotNetFunda includes: {0} section.", sectionType);

}

Kindly check it out and inform to me because i am using 3.5 framework.

Posted by: Tripati.patro on: 2/27/2011 Level:Starter | Status: [Member] | Points: 10

Hi Saravanan,

Sorry for late response.

In the above code mentioned by you, if you call DefalutValueMethod(); then the overloaded parameter less method will be invoked not the method having default parameter.

Hope this answers your query.

Posted by: T.saravanan on: 3/7/2011 Level:Silver | Status: [Member] [MVP] | Points: 10

Hi B.Tripati Patro,

Sorry for the delay....

Thanks for your response.

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