AllowEmptyValue

Gets or sets a value indicating whether the MfParams instance accepts empty values such as null or ""

OutputVar := instance.AllowEmptyValue
instance.AllowEmptyValue := value

Value

MfBool instance or var boolean

Gets

Gets a var boolean value indicating whether the MfParams instance accepts empty values such as null or ""

Sets

Sets whether the MfParams instance accepts empty values such as null or ""

Remarks

Default Value is false.

If set to true then you may add null values into the Add() method. The default value is false so adding null value in usin the constructor is not possible. You must first create an instance of MfParams, set AllowEmptyValue to true and then you can use the Add() method to add null values.

If an attempt to set a null value using Add() is made with first setting AllowEmptyValue to true then an MfException will be thrown by Add().

When AllowEmptyValue is set t true and the value being added is Null then Undefined is added as a var in place to the underlying list.

AllowOnlyAhkObj takes priority over AllowEmptyValue and if AllowOnlyAhkObj is true Empty values such as null or Undefined cannot be added to the underlying list.

Example

par := new MfParams()
par.AllowEmptyValue := true
par.AllowOnlyAhkObj := false
par.Add(null) ; converts to Undefined
par.Add(new MfInteger(33))
par.Add(MfNull.Null) ; converts to Undefined

For i, p in par
{
   if (p != Undefined)
   {
       ; take action
   }
}