How do I Check if dictionary has a word?

Basically what i am trying to do is:

What already done:

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Ajax my Realtime Databases and request info ( works fine)

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.

Ajax LastData output will be like:

"Json": {

"Apple":"Red;Small;Delicious;Water;Green;Big"

"Banana":"Yellow;Small;Big"

"Watermelon":"Water,Red;Delicious;Big;Giant;Green;Seeds"

"c2dictionary":"true"

}

.

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.

And a Dictionary will load (Works fine)

What I need:

I will text a text on the textbox like (e.g. Water) and compare if the dictionary in one of it keys have the value "Water"

And then call a Ajax using each key that have the word "Water" Like:

Ajax: Tag:"load" // url: MyDatabasesUrl&"/"&Dictionary.currentkey&".json"

.

.

Sry my bad english

You can repeat Dictionary.KeyCount to check Dictionary.Get("" & loopindex) that contains your keyword or not.