DecSoft Support - Determine if date was removed from date picker

Determine if date was removed from date picker

DecSoft HTML Compiler is easy to use: set your project's options and compile your apps and games in a nutshell.

DecSoft NeoPlugins put your VisualNeo projects into another level with +1,000 new actions for your apps.

DecSoft App Builder include a convenient Command Line Compiler, so you can compile your apps from the console.

Create apps and expand their capabilities by using the world's popular programming language: Javascript.

Compile, convert your modern HTML apps and games into Microsoft Windows executable programs without dependencies.

Apache Cordova's official plugins are supported out of the box and there are hundreds of plugins ready to use.

Create modern HTML apps and games at another level making things impossible to do even by modern HTML apps and games.

Take a look at our YouTube channel and subscribe to be notified about new videos!

DecSoft NeoPlugins are available in both runtime and designtime flavours to keep your apps as small as possible.

Save time, resources and money creating apps for Android, iOS and more with the same base of code.

Take a look at some frequently asked questions about us and our products!

Create multiplatform apps with DecSoft App Builder, including Android and iOS with the same base of code.

DecSoft HTML Compiler include a convenient Command Line Compiler, so you can compile your apps from the console.

DecSoft App Builder integrates an Open AI assistant in order to assist you while developing your apps.

Design for small screen devices but deploy also (without changes) in larger devices like tablets.

Save money by purchasing our NeoPlugins bundles. Five, Ten and even the complete NeoPlugins collection at an incredible price!

Peter Bradstreet

Hi David,

I am using the date picker that is displayed in the DateInput2 example. In my app I need to act conditionally based on whether the due date is set or not.

If you add a button to your sample app and put this code on click: VarIsUndefined "datePickerValue" "Result" AlertBox "[Result]" "primary" You can see that this detects whether a date is selected or not properly. However, if you select a date and then either clear the date manually or press Pick->Clear the 'Result' is 'False' meaning that it thinks that there is still a date selected.

Any idea how I could detect that they have cleared the date ?

Pete

Peter Bradstreet

A little more info. In DateInput2 there are 3 scenarios for the value of 'datePickerValue'
1. date has not been selected yet: datePickerValue = "undefined"
2. date has been selected: datePickerValue = timestamp for date selected
3. date was selected and then cleared out: datePickerValue = "null"
So it seems that I need to look to see if the value of datePickerValue is either 'undefined' or 'null'. Could you please let me know what the correct syntax is for 2 conditions?
If "a" "==" "a" or "b" "==" "b" Do something here EndIf

DecSoft

Hello Peter,

Something like the below one?


VarIsNull "[datePickerValue]" "[IsNull]"
VarIsNull "[datePickerValue]" "[IsUndefined]"

IfEx "([IsNull] == 'true') || ([IsDefined] == 'true')"
  Alert "Attention" "Please, provide a valid date"
EndIf

Purchase one or more licenses of our products if they are useful to you!

Peter Bradstreet

Just in case anybody has a future use for this, there were a couple of typos in David's code. The correct code should be:

VarIsNull "[datePickerValue]" "[IsNull]"
VarIsUndefined "[datePickerValue]" "[IsUndefined]"

IfEx "([IsNull] == 'true') || ([IsUndefined] == 'true')"
  Alert "Attention" "Please, provide a valid date"
EndIf

Everybody can read the DecSoft support forum for learning purposes, however only DecSoft customers can post new threads. Purchase one or more licenses of some DecSoft products in order to give this and other benefits.