dropdown list and selected Items on startup

[ballboy11]

I created a custom typeconverter dropdownlist

[GridCategory("Parameters")]
[TypeConverter(typeof(FileNameList))]
public string TradeFiles
{get;set;}


It load but the error is
Failed to get property 'TradeFiles' for indicator 'myindicator': Object reference not set to an instance of an object.

the issue is the dropdownlist is initially blank when i select the name in in the dropdownlist and press apply it will then work.

all i want to do is choose the first item in my dropdown list upon initialization

[NinjaTrader_Jesse]

Hello,

Thank you for the post.

I wanted to check, could you provide an export of the type converter/property into a sample script?

A string would not be null in this situation so this is very likely something in the TypeConverter is not being initialized. If you could provide a sample I would be able to review that further to see if I can find anything else.

You may also try supplying a default string if you are not already from SetDefaults:

TradeFiles = "whatever the default should be";

I look forward to being of further assistance.

[ballboy11]

Thanks Last question how to I get the value of the dropdown list?

[NinjaTrader_Jesse]

Hello,

The TypeConverter is only used to change how the property is displayed/selected, you still access the property if you want its value:

Print(TradeFiles);

You have defined a string property so it could be used anywhere a string is used.

Please let me know if I may be of further assistance.