How to remove an existing parameter of indicator?

[doron]

Hi

I develop indicator in NT8.
Suppose initially I generated the indicator with the wizard with parameters A,B,C .
The wizard generate base code . include A,B,C.

Logic with A,B and C was generated within the region "NinjaScript generated code"

As development progress I decided to add another parameter called D .
I added parameter D to region Properties and after compilation D was added automatically to region "NinjaScript generated code" .

As development progress I decided to remove parameter C ( it is not needed)
if I simply remove it from region Properties and compile I get error messages .
What is the proper way to remove a parameter from indicator ?

[NinjaTrader_ZacharyG]

Hello doron,

Thank you for writing in.

Once you have removed the particular property, have you deleted the variable assignment within State.SetDefaults for that property as well?

protected override void OnStateChange()
{
     if (State == State.SetDefaults)
     {
          [B]A = 1; // remove this[/B]
     }
}

#region Properties
[Range(1, int.MaxValue)]
[NinjaScriptProperty]
[Display(Name="A", Order=1, GroupName="Parameters")]
public int A
{ get; set; }
#endregion

If so, and you are still seeing an error, can you provide a screenshot of the error that you are seeing?

To send a screenshot with Windows 7 or newer I would recommend using Window's Snipping Tool.

Click here for instructions

Alternatively to send a screenshot press Alt + PRINT SCREEN to take a screenshot of the selected window. Then go to Start--> Accessories--> Paint, and press CTRL + V to paste the image. Lastly, save as a jpeg file and send the file as an attachment.

Click here for detailed instruction

[doron]

hi

the error after i remove a parameter is in the region "NinjaScript generated code"

I found that if i remove this region as i delete the parameter this region is regenerated again without an error

is this the correct procedure ?

[NinjaTrader_ZacharyG]

Hello doron,

You should not be modifying the NinjaScript generated code region.

Once you have removed the property and its variable assignment, the NinjaScript generated code region will regenerate without reference to that removed property.

[doron]

as i wrote after removing a parameter the regeneration process of this region has a problem.
try it you will see

[NinjaTrader_ZacharyG]

Hello doron,

You should not be removing or modifying anything within the NinjaScript generated code region.

If you are seeing errors after modifying it, please delete the region and recompile so a new NinjaScript generated code region is generated.

I am not seeing a compile error once I have removed a property from the script within the Properties region and removing its variable assignment.

[doron]

sorry you are correct i retried it and i see no problem now
i probably made a mistake
thx

[grose]

Note - if you comment out a parameter, the line [Category("Parameters")] will still be processed and you will get a compile error. Just do something like put a space in front of Parameters, as in [Category(" Parameters")], to fix that..

[NinjaTrader_ZacharyG]

Hello grose,

It would be expected for a compile error to occur. A property will need to be combined with the attribute. You cannot add an attribute without an entity that uses it placed below it.

Please take a look at this page from MSDN for more information about attributes: https://msdn.microsoft.com/en-us/library/mt653979.aspx