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Validate user inputs in PropertySheet

AbelPerez

I followed the sample here ProGuide Custom settings · Esri/arcgis-pro-sdk Wiki · GitHub and have added my own add-in settings to the backstage. I've binded several properties to the UI and it works great. I have a textbox where the user can browse to a folder where our company's data exists. If the user inputs an invalid folder I wanted to change the backcolor of the textbox and set the OK button to disabled until the input is fixed. A similar thing is done with the Layout options.

Ive looked in the community samples and looked at the Pro SDK and cant find anything. Where would I add my validation logic to mimic the existing Layout options?

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Accepted answers

GKmieliauskas

I have attached bundle of ProjectSettingsView mvvm code of BackStage_PropertyPage sample from Esri ArcGIS Pro samples. It works

ProjectSettingsView.zip

All comments

GKmieliauskas

Hi Abel,

This is the WPF stuff. Look here:

https://docs.microsoft.com/en-us/dotnet/framework/wpf/data/how-to-implement-binding-validation

AbelPerez

Yes Im aware of the validation binding. Thank You. What I am asking is how we tap into the Pro Settings OK button to disable it when something is not valid.

GKmieliauskas

You can disable OK button by setting Page IsValid property, like this:

base.IsValid = false;

AbelPerez

Ok I am able to bind my validation rules to the textbox. It works great! Thanks!.

But now am struggling how to get that result back to the ViewModel so I can update the IsValid of the page.

My XAML looks like this

In the ViewModel I can initialize to False and I can see that works:

Protected Overrides Function InitializeAsync() As Task

'setup the initial validity of the Page
MyBase.IsValid = False

Return Task.FromResult(0)
End Function

But how do I process updates? Just cant seem to figure that one out.

Wolf

In the setter for the MyAppDataDir property in the ViewModel set base.IsValid:

<SPAN class="comment token">// for example</SPAN>

<SPAN class="keyword token">public</SPAN> <SPAN class="keyword token">string</SPAN> MyAppDataDir
<SPAN class="punctuation token">{</SPAN>
   <SPAN class="keyword token">get</SPAN> <SPAN class="punctuation token">{</SPAN> <SPAN class="keyword token">return</SPAN> _myAppDataDir<SPAN class="punctuation token">;</SPAN> <SPAN class="punctuation token">}</SPAN>
   <SPAN class="keyword token">set</SPAN>
   <SPAN class="punctuation token">{</SPAN>
      <SPAN class="token function">SetProperty</SPAN><SPAN class="punctuation token">(</SPAN><SPAN class="keyword token">ref</SPAN> _myAppDataDir<SPAN class="punctuation token">,</SPAN> <SPAN class="keyword token">value</SPAN><SPAN class="punctuation token">,</SPAN> <SPAN class="punctuation token">(</SPAN><SPAN class="punctuation token">)</SPAN> <SPAN class="operator token">=</SPAN><SPAN class="operator token">></SPAN> MyAppDataDir<SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">;</SPAN>
      <SPAN class="keyword token">base</SPAN><SPAN class="punctuation token">.</SPAN>IsValid <SPAN class="operator token">=</SPAN> System<SPAN class="punctuation token">.</SPAN>IO<SPAN class="punctuation token">.</SPAN>Directory<SPAN class="punctuation token">.</SPAN><SPAN class="token function">Exists</SPAN><SPAN class="punctuation token">(</SPAN><SPAN class="keyword token">value</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">;</SPAN>
   <SPAN class="punctuation token">}</SPAN>
<SPAN class="punctuation token">}</SPAN>
‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍<SPAN class="line-numbers-rows"><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN></SPAN>

AbelPerez

Wolfgang Kaiser‌ I had something similar but didnt work. I believe its because of the Validity rules. Since the path doesnt exist then the property is never set.

Public Property MyDataDir As String
Get
Return _myAppDataDir
End Get
Set(ByVal value As String)
MyBase.IsValid = False
If SetProperty(_aaAnalystAppDataDir, value, Function() MyAppDataDir) Then
MyBase.IsModified = True
MyBase.IsValid = True 'the property passed the validity rules
Else
MyBase.IsValid = False
End If
End Set
End Property

I even changed my XAML to

<Binding Path="MyAppDataDir" UpdateSourceTrigger="PropertyChanged" ValidatesOnExceptions="True" ValidatesOnDataErrors="True" NotifyOnValidationError="True">

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