exists

[ Function ]

public static exists(
    propertyName: string,
    control: TcHmi.Controls.System.baseTcHmiControl
): boolean;

Determines whether a binding exists between a symbol and a control attribute.

Parameter

Name	Type	Description
propertyName	string	Name of the attribute
control	TcHmi.Controls.System.baseTcHmiControl	Reference to the control instance

Return value

Type	Description
boolean	Returns true if the attribute is linked to a symbol.

	Available from version 1.10

Sample - JavaScript

var myControl = TcHmi.Controls.get('TcHmiTextbox_1');
if(myControl){
    var result = TcHmi.Binding.exists('Text',myControl);
    if(result){
         // Binding exists
    } else {
         // Binding exists not
    }
}