How to add a custom function to the expression editor

[Chris]

I am able to add a custom function no problem, however; doing so seems to remove all the default functions (see screenshot). Any ideas on how to add a custom function and leave the default functions as well?

Telerik.Data.Expressions.ExpressionContext.Context = new MyExpressionContext();
Telerik.WinControls.UI.RadExpressionEditorForm.ExpressionItemsList.Add(
    new Telerik.Data.Expressions.ExpressionItem
{
    Name = "MarketDate (Endur)",
    Value = "MarketDate()",
    Syntax = "MarketDate()",
    Type = Telerik.Data.Expressions.ExpressionItemType.OtherFunc,
    Description = "Returns the market date as it appears in the market manager."
});

Using the LoadFromXml function as described in the help has the same results.

[Dimitar]

Hi Chris,

Thank you for writing.

By default if you add custom item the default ones are not added. To load them you should call the LoadFromXML method with no parameter:

RadExpressionEditorForm.ExpressionItemsList.LoadFromXML();
RadExpressionEditorForm.ExpressionItemsList.Add(item);

Please let me know if there is something else I can help you with. 

 

Regards,
Dimitar
Telerik