Hey guys please help me here. Im using a converter to bind to an enumeration with a three state checkbox. I have a 3 value enumeration, Allowed, Denied, and Unassigned. I have a custom styled checkbox that is red, green, and yellowe depending on the bound value of the enumeration. However I cannot get this to update the property on my bound object when i change the value of the checkbox. The very weird thing is I can get it to work (which is not an option i can use).  If I dont use a celleditor template and just define a cellcontent template, then the editor by default is a text value -- if i type in the enumeration and hit enter or click on another row to call EndEdit then i can see the changes reflected in my business objects bound PrivilegeStatus property. However (and ive tried like 5 different combinations or things) when I define a celleditor template with a checkbox then the property is never updated after the EndEdit. Very strange. Ive also looked at changing the return values for my ConvertBack function in my converter, to no avail. I will past the code for my converter and then for my datatemplates. Someone here please help! :)

 

This is the setup where I can edit the text and type in the correct enum value and it works, but this is not an option i can take.

<xcdg:Column Title="Privilege Status" FieldName="UserPrivilegeStatus" ReadOnly="False" >

<xcdg:Column.CellContentTemplate>

<DataTemplate>

 

<CheckBox Style="{DynamicResource PrivilegeCheckbox}" IsThreeState="True" IsChecked="{Binding Path=.,Converter={StaticResource StatusConverter},Mode=TwoWay,UpdateSourceTrigger=PropertyChanged}" />

 

</DataTemplate>

</xcdg:Column.CellContentTemplate>

<!--<xcdg:Column.CellEditor>

<xcdg:CellEditor>

<xcdg:CellEditor.EditTemplate>

<DataTemplate>

 

<CheckBox Style="{DynamicResource PrivilegeCheckbox}"  IsThreeState="True" IsChecked="{Binding Path=.,Converter={StaticResource StatusConverter},Mode=TwoWay,UpdateSourceTrigger=PropertyChanged}" />

</DataTemplate>

</xcdg:CellEditor.EditTemplate>

</xcdg:CellEditor>

</xcdg:Column.CellEditor>-->

</xcdg:Column>

 

 

Heres my converter code

Public Function Convert(ByVal value As Object, ByVal targetType As System.Type, ByVal parameter As Object, ByVal culture As System.Globalization.CultureInfo) As Object Implements System.Windows.Data.IValueConverter.Convert

If (value IsNot Nothing) And (CType(value, String) <> "") Then

Dim status As Common.Enums.PrivilegeStatus = CType(value, Common.Enums.PrivilegeStatus)

Select Case status

Case Common.Enums.PrivilegeStatus.Allowed

Return True

Case Common.Enums.PrivilegeStatus.Denied

Return False

Case Common.Enums.PrivilegeStatus.Unassigned

Return Nothing

Case Else

Return Nothing

End Select

Else

Return Nothing

End If

End Function

Public Function ConvertBack(ByVal value As Object, ByVal targetType As System.Type, ByVal parameter As Object, ByVal culture As System.Globalization.CultureInfo) As Object Implements System.Windows.Data.IValueConverter.ConvertBack

If value Is Nothing Then

Return Common.Enums.PrivilegeStatus.Unassigned

Else

If CType(value, Boolean) = False Then

Return Common.Enums.PrivilegeStatus.Denied

Else

Return Common.Enums.PrivilegeStatus.Allowed

End If

End If

Throw New Exception("Cannot convert back")

End Function

 

 

Any help is greatly appreciated!

 

Thanks

Justin Coon

In your EditTemplate, you need to use a CellEditorBinding to bind the value of the IsChecked property.

---

Technical Writer - Xceed Software

Of all the things I've lost, I miss my mind the most. - Mark Twain

Jenny thank you so much for your reply. This is for a project at work, which im kind of stuck till I can get past this. I looked at the documentation examples and its still a little fuzzy to me. Here is what i have and it still is not updating the privilegestatus property in my bound object.

 

<xcdg:Column Title="Privilege Status" FieldName="UserPrivilegeStatus" ReadOnly="False" >

<xcdg:Column.CellContentTemplate>

<DataTemplate>

 

<CheckBox Style="{DynamicResource PrivilegeCheckbox}" IsThreeState="True" IsChecked="{Binding Path=.,Converter={StaticResource StatusConverter},Mode=TwoWay,UpdateSourceTrigger=PropertyChanged}" />

 

</DataTemplate>

</xcdg:Column.CellContentTemplate>

<xcdg:Column.CellEditor>

<xcdg:CellEditor>

<xcdg:CellEditor.EditTemplate>

<DataTemplate>

 

<CheckBox Style="{DynamicResource PrivilegeCheckbox}" IsThreeState="True" IsChecked="{Binding xcdg:CellEditorBinding,Converter={StaticResource StatusConverter},Mode=TwoWay,UpdateSourceTrigger=PropertyChanged}" />

</DataTemplate>

</xcdg:CellEditor.EditTemplate>

</xcdg:CellEditor>

</xcdg:Column.CellEditor>

</xcdg:Column>

 

Any thoughts? I must be doing something wrong ....

Hey Jenny I think I got it. :)

IsChecked="{xcdg:CellEditorBinding Converter={StaticResource StatusConverter}}"

 

I think thats working. Thank you so much for your help it is greatly appreciated. Also thank you for being so active in the forums its so helpful. I see you answering many many posts.

 

Justin

Hi,

 how do I have to write ConverterParameter?

No. You do not need to write a converter parameter. Whatever you put there (for example "HelloWorld") will appear as the "parameter" parameter in  your converter's Convert method.

---

Technical Writer - Xceed Software

Of all the things I've lost, I miss my mind the most. - Mark Twain

for example

 

<TextBlock Text="{Binding Path=SomeProperty, Converter={StaticResource aConverter}, ConverterParameter='a string parameter to pass to the converter'}" />