Initialising array of struct KeyValuePair<TKey,TValue>

[Russell Hind]

I want to create an array of key value pairs. This code compiles fine:

KeyValuePair<string, object>[] kvps = {
new KeyValuePair<string,object>( "int", 5 ),
new KeyValuePair<string,object>( "string", "robot")
};

But is their no shorthand to this such as

KeyValuePair<string,object>[] kvps = {{"int",5 },{"string","a string"}};

This works:

object[,] kvps = {{"int",5},{"string","a string"}};

But I would like the array to be KeyValuePairs<> and the top syntax is
very long winded.

Cheers

Russell

 

[Tom Spink]

I want to create an array of key value pairs. This code compiles fine:

KeyValuePair<string, object>[] kvps = {
new KeyValuePair<string,object>( "int", 5 ),
new KeyValuePair<string,object>( "string", "robot")
};

But is their no shorthand to this such as

KeyValuePair<string,object>[] kvps = {{"int",5 },{"string","a string"}};

This works:

object[,] kvps = {{"int",5},{"string","a string"}};

But I would like the array to be KeyValuePairs<> and the top syntax is
very long winded.

Cheers

Russell

Hi Russell,

May I ask why you aren't using a Dictionary<K,V>?

///
Dictionary<string, object> myDict = new Dictionary<string, object>();

myDict.Add( "int", 5 );
myDict.Add( "string", "robot" );
///

Is it because you need duplicate keys?

 

[Russell Hind]

Hi Russell,

May I ask why you aren't using a Dictionary<K,V>?

///
Dictionary<string, object> myDict = new Dictionary<string, object>();

myDict.Add( "int", 5 );
myDict.Add( "string", "robot" );
///

Is it because you need duplicate keys?

I am using a dictionary inside the objectthat this kvp array is passed
to. I'm trying to find the easiest way for a user to initialise the
structure. I started with your code above but would have liked to to
come down to something like this:

Dictionary<string,object> D = new Dictionary<string,object>();
D.AddItems({{"int",5},{{"string","robot"}});

But the dictionary is wrapped up in a larger object so I wanted the user
to have a very simple way to create the items as an array to fill in the
dictionary.

I'm just trying to reduce the code the user has to write basically as
this will be done in many places for us.

Cheers

Russell

 

[Guest]

I want to create an array of key value pairs. This code compiles fine:

KeyValuePair<string, object>[] kvps = {
new KeyValuePair<string,object>( "int", 5 ),
new KeyValuePair<string,object>( "string", "robot")
};
But is their no shorthand to this such as
KeyValuePair<string,object>[] kvps = {{"int",5 },{"string","a string"}};

I think that's not, because you need create an object that will be
referenced from the array item

This works:
object[,] kvps = {{"int",5},{"string","a string"}};

Yes, because in that case you object created explicitly for the simple types
see object[] kvps = {"12", 5, new YouClass()};

But I would like the array to be KeyValuePairs<> and the top syntax is
very long winded.

--
WBR,
Michael Nemtsev :: blog: http://spaces.msn.com/laflour

"At times one remains faithful to a cause only because its opponents do not
cease to be insipid." (c) Friedrich Nietzsche

 

[Linda Liu [MSFT]]

Hi Russell,

Thank you for posting.

I don't think you could use the shorthand array initializers in this case.
The element type of kvps is KeyValuePair structure which is a complex data
type and array initializers can only be used in a variable or field
initializer.

In the statement "object[,] kvps = {{"int",5},{"string","a string"}};", the
element type of kvps is object which is a simple data type, so array
initializers can be used in this statement.

If you have anything unclear, please feel to let me know.


Sincerely,
Linda Liu
Microsoft Online Community Support

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[Linda Liu [MSFT]]

Hi Russell,

I am closely monitoring the newsgroup and I am contacting you to check the
issue status.

If you have anything unclear, please feel free to post in the newsgroup and
we will follow up.

Thank you for using our MSDN Managed Newsgroup Support Service!


Sincerely,
Linda Liu
Microsoft Online Community Support

============================================================================
=============================================
Get notification to my posts through email? Please refer to
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With newsgroups, MSDN subscribers enjoy unlimited, free support as opposed
to the limited number of phone-based technical support incidents. Complex
issues or server-down situations are not recommended for the newsgroups.
Issues of this nature are best handled working with a Microsoft Support
Engineer using one of your phone-based incidents.

============================================================================
=============================================
This posting is provided "AS IS" with no warranties, and confers no rights.

 

[Russell Hind]

Hi Russell,

I am closely monitoring the newsgroup and I am contacting you to check the
issue status.

If you have anything unclear, please feel free to post in the newsgroup and
we will follow up.

Thank you for using our MSDN Managed Newsgroup Support Service!

Thanks for the follow-up. There are numerous solutions to this, some
simpler than others, that I can use so no need for anything more.

Ultimately it would be nice if the language could be altered so that
something like this is possible

KeyValuePair<string, object>[] kvps = {("int",5), ("string","robot")};

(i.e. The compiler looks for a constructor of the array element type
that can take the given parameters) but as it isn't, I can use another
solution.

Cheers

Russell

 

[Linda Liu [MSFT]]

Hi Russell,

Thanks for your quick response.

I think your thought is good. However, at the present time it is
unfortunately not feasible. Thank you for your understanding and support
for Microsoft!

If you have any other questions in the future, please don't hesitate to
contact us. It is always our pleasure to be of assistance.

Have a nice day!


Sincerely,
Linda Liu
Microsoft Online Community Support

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=============================================
Get notification to my posts through email? Please refer to
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ications.

With newsgroups, MSDN subscribers enjoy unlimited, free support as opposed
to the limited number of phone-based technical support incidents. Complex
issues or server-down situations are not recommended for the newsgroups.
Issues of this nature are best handled working with a Microsoft Support
Engineer using one of your phone-based incidents.

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=============================================
This posting is provided "AS IS" with no warranties, and confers no rights.