How to Define a generic method ?

Question

Dear all,

I have the following 2 methods :

1	public void LoadRunningTags(TagnameParameters tags)
2	{
3	foreach (ItTagname tag in tags)
4	{
5	string Tagname = tag.TagName; //"AnalogDevice_004";
6	string Value = tag.Value; //"0";
7	System.Console.WriteLine("Tag name: {0} with Value: {1}", Tagname, Value);
8	}
9
10
11	}

1	public void LoadNextTags(NextTagnameParameters nxtTags)
2	{
3	foreach (ItNextTagname tag in nxtTags)
4	{
5	string Tagname = tag.TagName; //"AnalogDevice_004";
6	string Value = tag.Value; //"0";
7
8
9	System.Console.WriteLine("Tag name: {0} with Value: {1}", Tagname, Value);
10	}
11
12	}

As you can see only the type pass as parameter is change.

I am trying to build a generic method out of this 2 function above.
Is there a way to specify the type as beeing of one or the other ?

I have try as follow :

public bool LoadTag<T>(T tagparam) where T:TagnameParameters,NextTagnameParameters

but it is refusing

thanks for help
regards
serge

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Your experience is build from the one of others

Answer 1

You would need to inherit both from a common interface that implements the TagName and the value properties:

Define your classes like this:

public interface ITagParameters

{

    string TagName { get; set; }

    string Value { get; set; }

}

 

public class TagnameParameters : ITagParameters

{

    public string TagName { get; set; }

    public string Value { get; set; }

}

 

public class NextTagnameParameters : ITagParameters

{

    public string TagName { get; set; }

    public string Value { get; set; }

}

 

And your method would look like this:

public void LoadTags<T>(T tag) where T : ITagParameters

{

    Console.WriteLine("Tag Name: {0} with Value {1}", tag.TagName, tag.Value);

}

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David Morton - http://blog.davemorton.net/

Answer 2

Thanks for your reply.

What about then if I need to pass to my generic method either a List of ITagParameters or ITagParameters ?

wil it become something like :

public void LoadTags<List<T>>(T tag) where T : ITagParameters

thnaks

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Your experience is build from the one of others

Answer 3

Close:

public void LoadTags<T>(List<T> tag) where T : ITagParameters

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David Morton - http://blog.davemorton.net/

Answer 4

 Args, caramba :-)
thnaks

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Your experience is build from the one of others