v9 dropdown and KeyValuePair

Milosz Pawlicki

I have function which returns metastorm List object. I assign to this object list of keyvaluepair objects:

KeyValuePair<string, string>[] objects = new KeyValuePairObjects<string, string>[...];

objects[0] = new KeyValuePair<string, string>("1", "value1");

objects[1] = new KeyValuePair<string, string>("2", "value");

List l = new List(objects);

and now i assign this list to dropdown list options (using creted method promoted to expression builder)

What value should be returned by dropdown (what should be assigned to dropdown variable)?

I'm a bit lost because in my opinion key should be returned, which is in first parameter of KeyValuePair constructor

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Comments

Rob Vignerot

Milosz,

If I understand you correctly, I would expect the key to be returned as well. What is actually happening? Do you have a sample solution?

Rob

Milosz Pawlicki

Hi Rob

I thought that values of keyvaluepair class are displayed in dropdown and key is assigned to variable after we select sth in dropdown, i think it is vice versa, correct me if i am wrong

Jerome_Pearce

The problem is the naming used. The name we are used to in version 7 is 'name, value' pair. Metastorm are now erroneously using the name 'key, value' pair. The former implies the 'displayed value' is first and the 'id' is second. The latter implies the 'id' is first and the 'displayed value' is second.

The Metastorm Pair() function does return a pooly named KeyValuePair object. The parameters to the function are 'name' and 'value', but the return is called a KeyValuePair, that is the problem. It actually consists of a 'name' and 'value' ('id') pair, in that order.

I hope that helps.