Dictonary Object

 Dictionary Object 

Dictionary Object  stores data key, item pairs. A Dictionary object stores the items in the array. Each item is associated with a unique key. The key is used to retrieve an individual item and is usually an integer or a string, but can be anything except an array.

 

 Adavntages of using it in QTP:

1. can be used as Global variable declaration. so that any test can access the values from it in the run time.

2. You can store and retrive any number of run time values in to dictonary.

3. It is one of the Parameterization techique we can use in QTP

 

 Disadvantages:

we can not specify the values in the desingn time like Datatable , Action parameters, environment variable.

So it is useful only in Run time , not design time

Methods:

Add Method

Adds a key and item pair to a Dictionary

object. object.Add (key, item)

Arguments 

object Required. Always the name of a Dictionary object.

key Required. The key associated with the item being added.item Required.

The item associated with the key being added. 

Remarks

An error occurs if the key already exists.

The following example illustrates the use of the Add method.

Dim d   ‘ Create a variable. 

Set d = CreateObject(“Scripting.Dictionary”) 

 d.Add “a”, “Athens”   ‘ Add some keys and items.  

d.Add “b”, “Belgrade”

 

 Items Method

 Returns an array containing all the items in a Dictionary object. 

object.Items( )

 Remarks The object is always the name of a Dictionary object.The following code illustrates use of the Items method:

Set d = CreateObject(“Scripting.Dictionary”)   

 d.Add “a”, “Athens”   ‘ Add some keys and items.  

  d.Add “b”, “Belgrade”    

   a = d.Items   ‘ Get the items.  

  For i = 0 To d.Count -1 ‘ Iterate the array.

       s = s & a(i) & “<BR>” ‘ Create return string.  

      Next

Msgbox s  

     Exists Method

 Returns true if a specified key exists in the Dictionary object, false if it does not.

object.Exists(key)

 Arguments

object Required. Always the name of a Dictionary object.

key Required. Key value being searched for in the Dictionary object.

 Remarks

The following example illustrates the use of the Exists method.

Set d = CreateObject(“Scripting.Dictionary”)  

  d.Add “a”, “Athens”   ‘ Add some   keys and items.   

 d.Add “b”, “Belgrade”   

   If d.Exists(“c”) Then   

    Msgbox  “Specified key exists.”   

 Else      

 Msgbox  “Specified key doesn’t exist.” 

   End If

  Keys Method

Returns an array containing all existing keys in a Dictionary object.

 object.Keys( )

Remarks

The object is always the name of a Dictionary object.

The following code illustrates use of the Keys method:   

Dim a, d, i   ‘ Create some variables.   

 Set d = CreateObject(“Scripting.Dictionary”)   

 d.Add “a”, “Athens”   ‘ Add some keys and items.  

  d.Add “b”, “Belgrade”   

  a = d.Keys   ‘ Get the keys. 

   For i = 0 To d.Count -1 ‘ Iterate the array.    

   s = s & a(i) & “<BR>” ‘ Return results.   

  Next

Msgbox s

 Remove Method  

Removes a key, item pair from a Dictionary object. 

object.Remove(key) 

Arguments

 object Required. Always the name of a Dictionary object.

key Required. Key associated with the key, item pair you want to remove from the Dictionary object.

Remarks

An error occurs if the specified key, item pair does not exist.

The following code illustrates use of the Remove method:

Dim a, d   ‘ Create some variables. 

Set d = CreateObject(“Scripting.Dictionary”) 

d.Add “a”, “Athens”   ‘ Add some keys and items. 

d.Add “b”, “Belgrade”

 d.Add “c”, “Cairo” … 

d.Remove(“b”)   ‘ Remove second pair.

RemoveAll Method

 The RemoveAll method removes all key, item pairs from a Dictionary object.

 object.RemoveAll( ) 

Dim a, d, i   ‘ Create some variables.

 Set d = CreateObject(“Scripting.Dictionary”) 

d.Add “a”, “Athens”   ‘ Add some keys and items.

 d.Add “b”, “Belgrade” 

d.Add “c”, “Cairo” … 

a = d.RemoveAll   ‘ Clear the dictionary.

Author: Mohan Kakarla

Reference:MSDN