Vault Data Standard - Blank Rows in Combo Box

[Darin.Green]

Issue:

Within my combo box, there are a number of blank rows before the row containing information:

The combo box has uses the SelectedItem from the previous Combo Box.

Below is the XML structure of the content. NOTICE: There are a number of Types listed before my Build attributes. Those are actually the blank lines in my Combo Box...

I would like to know how to get rid of the blank rows...

Any help would be appreciated.

Thanks,

Darin

[wangdu]

Hi,

It is difficult to say what could be the cause for the blank rows. Maybe you could post a simple sample (xaml + xml etc.) that reproduces this behaviour so that I can give a look.

Anyway, FYI, I have found a nice example on the web that uses XmlDataProvider and XPath queries to filter unwanted data. https://docs.microsoft.com/en-us/dotnet/framework/wpf/data/how-to-bind-to-xml-data-using-an-xmldatap...

Wangdu

coolOrange

www.coolOrange.com

[Darin.Green]

@wangdu

I was able to remove the blank rows using a DataContext method as follows:

<ComboBox x:Name="Build1" Height="Auto" Grid.Row="6" Grid.Column="1" 
  ItemsSource="{Binding XPath=Build}" 
  DataContext="{Binding SelectedItem, ElementName=Option1}" 
  DisplayMemberPath="@Build" 
  SelectedValuePath="@Build" 
  SelectedValue="{Binding Prop[Building].Value}"/>

Although it's displaying correctly, the value within the Custom Property is no longer selected when the dialog is opened...

The Property is already set to 1 for Building, but the form is no longer selected that value since making the changes above. @wangdu, Do you know why that may be?

Thanks,
Darin

[wangdu]

Hi,

Is it the Mode property that you have to set to TwoWay?

<ComboBox x:Name="Build1" Height="Auto" Grid.Row="6" Grid.Column="1" 
  ItemsSource="{Binding XPath=Build}" 
  DataContext="{Binding SelectedItem, ElementName=Option1}" 
  DisplayMemberPath="@Build" 
  SelectedValuePath="@Build" 
  SelectedValue="{Binding Prop[Building].Value, Mode=TwoWay}"/>

Hope this helps!

Wangdu

coolOrange

www.coolOrange.com

[Darin.Green]

@wangdu

Changing the Mode to TwoWay didn't help. 

Do you know if there's something I can add into the Default.ps1 file to not list the blank rows? I'm open to anything at this point.

[wangdu]

hi,

<ComboBox x:Name="Build1" Height="Auto" Grid.Row="6" Grid.Column="1" 
  ItemsSource="{Binding XPath=./Build/@Type}" 
  DataContext="{Binding SelectedItem, ElementName=Option1}" 
  SelectedIndex="0" 
  SelectedItem="{Binding Prop[Building].Value}"/>

Does this help? I am assuming the 'Type' attribute is what you want in the Prop[Building].Value. Correct the attribute name, if that's not the one.

Wangdu

coolOrange

www.coolOrange.com

[Darin.Green · Accepted solution]

@wangdu

I was able to resolve the issue by incorporating LastChild.ChildNodes

<ComboBox
   x:Name="Build1"
   Height="Auto"
   Grid.Row="7"
   Grid.Column="1"
   ItemsSource="{Binding SelectedItem.LastChild.ChildNodes, ElementName=Option1}"
   DisplayMemberPath="@Build" 
   SelectedValuePath="@Build" 
   SelectedValue="{Binding Prop[Building].Value}"/>

[wangdu]

Hi,

Glad that you have been able to resolve the issue.

You could accept it as solution and could help some others in the future..

Wangdu

coolOrange