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How to Pass multiple parameter in Multivalue Converter Over WPF DataTrigger

I'm having four int Property ProOne, ProTwo, ProThree and ProFour
I have to Implement the Boolean Logic ((ProOne == ProTwo) || (ProThree == ProFour)) in the Multivalue Converter namely VisibilityCheckConverter. Based on the Logic the Multivalue Converter VisibilityCheckConverter returns True or False.
Now I need to pass the four properties to the Converter over DataTrigger, Based on the Value, I have to change the Buttons Visibility to Visible
How does one write the a DataTrigger using Multivalue Converter with multiple parameters?
Sample Piece of XAML Code:
<ControlTemplate.Triggers>
<DataTrigger Property="{Binding , Converter={StaticResource VisibilityCheckConverter,ConverterParameter=ProOne ProTwo ProThree ProFour}}" Value="true">
<Setter TargetName="Button" Property="Visibility" Value="Visible" />
</DataTrigger>
</ControlTemplate.Triggers>

You can do something like this
<Style.Triggers>
<DataTrigger Value="True">
<DataTrigger.Binding>
<MultiBinding Converter="{StaticResource VisibilityCheckConverter}">
<Binding Path="ProOne" />
<Binding Path="ProTwo" />
<Binding Path="ProThree" />
<Binding Path="ProFour" />
</MultiBinding>
</DataTrigger.Binding>
<Setter TargetName="Button" Property="Visibility" Value="Visible" />
</DataTrigger>
</Style.Triggers>

Per-item converter instance in style of treeview item container

I have ItemContainerStyle set for TreeView and use MultiBinding with converter in it:
<TreeView>
<TreeView.ItemContainerStyle>
<Style TargetType="{x:Type TreeViewItem}">
<Setter Property="IsSelected">
<Setter.Value>
<MultiBinding Converter="{StaticResource SelectedCategoryConverter}" Mode="TwoWay">
<Binding Path="."/>
<Binding Path="CurrentCategoryId" RelativeSource="{RelativeSource AncestorType=UserControl}"/>
</MultiBinding>
</Setter.Value>
</Setter>
<Setter Property="IsExpanded" Value="True" />
</Style>
</TreeView.ItemContainerStyle>
</TreeView>
I need SelectedCategoryConverter to be created for every unique item in the tree view, so I declared it with x:Shared="False" in window resources:
<local:SelectedCategoryConverter x:Shared="false" x:Key="SelectedCategoryConverter"/>
but it doesn't help: only one instance of converter is created when 2 or more items passed to TreeView through ItemsSource. I tried to write converter as MarkupExtension, but it didn't help too.

I think there is only one way.
1. Move ItemContainerStyle to the resource and marked it as nonshared:
<Application.Resources>
<Style x:Key="TreeViewItemStyle" TargetType="{x:Type TreeViewItem}" x:Shared="False">
<Setter Property="IsSelected">
<Setter.Value>
<MultiBinding Converter="{local:SelectedCategoryConverterCreator}" Mode="TwoWay">
<Binding Path="."/>
<Binding Path="CurrentCategoryId" RelativeSource="{RelativeSource AncestorType=UserControl}"/>
</MultiBinding>
</Setter.Value>
</Setter>
<Setter Property="IsExpanded" Value="True" />
</Style>
</Application.Resources>
<TreeView ItemContainerStyle="{StaticResource TreeViewItemStyle}">
Create your own MarkupExtension which will create a new instance of SelectedCategoryConverter:
public class SelectedCategoryConverterCreatorExtension : MarkupExtension
{
public override object ProvideValue(IServiceProvider serviceProvider)
{
return new SelectedCategoryConverter();
}
}
It will create a new instance of SelectedCategoryConverter for each item. But remember that it is not very memory efficient.

WPF DataGridTextColumn binding and style

here's the deal: styling the DataGridTextColumn's textblock for a datagrid.
I need to format the textblock by it's value, by comparing it from another binded value.
What i want to achieve is something like this:
<Style x:Key="ExpeditionerCellStyle" BasedOn="{StaticResource RightAlignStyle}" TargetType="{x:Type TextBlock}">
<Style.Triggers>
<DataTrigger Binding="{Binding Path=BEST}" Value="{RelativeSource Mode=Self}">
<Setter Property="Background" Value="Green" />
</DataTrigger>
</Style.Triggers>
</Style>
Which is not possible, because the Value of Datatrigger cannot be a relative source.
So i tried with multibinding
<Style x:Key="ExpeditionerCellStyle" BasedOn="{StaticResource RightAlignStyle}" TargetType="{x:Type TextBlock}">
<Style.Triggers>
<DataTrigger Value="True">
<DataTrigger.Binding>
<MultiBinding Converter="{StaticResource IsValueEqualParameterConverter}">
<Binding Path="BEST" />
<Binding RelativeSource="{RelativeSource Mode=Self}" />
</MultiBinding>
</DataTrigger.Binding>
</DataTrigger>
</Style.Triggers>
</Style>
with no luck: textblock Text property is empty, probably because the style is applied before the actual binding is performed.
I have no more ideas.
Please help me!

I'm not sure if this will work, but I noticed that you forgot to specify the Binding.Path in your MultiConverter example... try this:
<Style x:Key="ExpeditionerCellStyle" BasedOn="{StaticResource RightAlignStyle}" TargetType="{x:Type TextBlock}">
<Style.Triggers>
<DataTrigger Value="True">
<DataTrigger.Binding>
<MultiBinding Converter="{StaticResource IsValueEqualParameterConverter}">
<Binding Path="BEST" />
<Binding Path="Text" RelativeSource="{RelativeSource Mode=Self}" />
</MultiBinding>
</DataTrigger.Binding>
</DataTrigger>
</Style.Triggers>
</Style>

If you only want to change the style of the textblock based on the content of the textblock why not just add a bidning to the textblock background and use a converter to check the content of the text?
In other words bind both the text and the background to the same source and use a converter with the background and in the converter match the content and return the correct background style.
If you need something else leave a comment so we better know what the problem is.

I ended modifying a bit my code.
Instead of relying on the value of the cell, in the field "BEST" i passed the name of the column.
Then using the converter I check
Current textblock (as suggested by #Sheridan) -> DatagridCell -> Column's header
if it match, i change the style on this textblock.
Thanks everyone!!!

WPF CheckBox multiBinding

I need to bind a checkBox to TWO property and I think that i have to use multiBindings
so far i have this, but this doesn't work.
<CheckBox x:Name="FilterAll" Content="All">
<CheckBox.IsChecked>
<MultiBinding>
<Binding Path="SearchEngineCompassLogView.FilterSearch.IsFilterAllEnable"
Source="{StaticResource CompassLogView}">
</Binding>
<Binding Path="SearchEngineCompassLogView.FilterSearch.IsFilterVisible"
Source="{StaticResource CoreServiceLogView}">
</Binding>
</MultiBinding>
</CheckBox.IsChecked>
</CheckBox>
is this even possible with MultiBinding?

You could use MultiBinding. And as ethicallogics said, you must use a converter to do the actual logic of the parameters (whether you want to do AND, OR, whatever. You can see a little more about those here
I'm not sure what you are trying to affect on your checkbox, but in the end it will look something like this.
<CheckBox.IsChecked>
<MultiBinding Converter="{StaticResource MultiBoolConverter}">
<Binding Path="SearchEngineCompassLogView.FilterSearch.IsFilterAllEnable" Source="{StaticResource CompassLogView}"/>
<Binding Path="SearchEngineCompassLogView.FilterSearch.IsFilterVisible"
Source="{StaticResource CoreServiceLogView}"/>
</MultiBinding>
</CheckBox.IsChecked>
There is also another way to do this as well, which I sometimes find useful. It's called DataTriggers. If you've done any work with Styles and Templates then you may have seen them before. Here is an example based on your question:
<CheckBox>
<CheckBox.Style>
<Style TargetType={x:Type CheckBox}>
<Style.Triggers>
<MultiDataTrigger>
<MultiDataTrigger.Conditions>
<Condition Binding="{Binding Path="SearchEngineCompassLogView.FilterSearch.IsFilterAllEnable" Source="{StaticResource CompassLogView}" Value="True"/>
<Condition Binding="{Binding Path="SearchEngineCompassLogView.FilterSearch.IsFilterVisible" Source="{StaticResource CoreServiceLogView}" Value="True"/>
</MultiDataTrigger.Conditions>
<Setter Property="CheckBox.IsChecked" Value="True"/>
</MultiDataTrigger>
</Style.Triggers>
</Style>
</CheckBox.Style>
</CheckBox>

You must specify converter in MultiBinding.Multibinding

Change DataTrigger binding reference at runtime

I've a ListView with this DataTrigger attached:
<Style x:Key="HideShowStyle" TargetType="{x:Type ListViewItem}">
<Style.Resources>
<localConverters:ShowHideConverter x:Key="ShowHideConverter" />
</Style.Resources>
<Style.Triggers>
<DataTrigger Value="true">
<DataTrigger.Binding>
<MultiBinding Converter="{StaticResource showHideConverter}">
<Binding Path="EndingDate" />
<Binding Path="UserName" />
<Binding ElementName="SearchBox" Path="Text" />
</MultiBinding>
</DataTrigger.Binding>
<Setter Property="Visibility" Value="Visible" />
</DataTrigger>
<DataTrigger Value="false">
(...)
</DataTrigger>
</Style.Triggers>
</Style>
I use this in a hardcoded scenario to hide/show some ListItems in the ListView. The binding source is specified in the ElementName tag, and the TextBox referred is declared a few lines before.
Now, I've the necessity to change that Binding at runtime with another field incapsulated in a istantiated class. I've tried to use WPF class instead of XAML, but nothing, I don't have any clue how to obtain this.
I'm open to any advice! :)

var style = (Style)FindResource("HideShowStyle");
var trigger = (DataTrigger)style.Triggers[0];
var multibinding = (MultiBinding)trigger.Binding;
var binding1 = (Binding)multibinding.Bindings[0];
var binding2 = (Binding)multibinding.Bindings[1];
var binding3 = (Binding)multibinding.Bindings[2];
Change bindings at will.