# Explicit Column Filtering
## Content
FullTextFilterBehavior provides developers with comprehensive control to enable filtering operations on preferred columns. Columns can be explicitly included or excluded by using the FilteredFields or MatchBooleans properties to provide a cleaner and more relevant filtering experience for end-users.
### **Key Capabilities**
1. Explicit Column Inclusion by Field Name
* Define which columns should be filterable by specifying a collection of field names using the FilteredFields property.
2. Dynamic Filtering UI
* The filtering UI automatically adjusts to show the fields specified using the FilteredFields property or based on column types.
3. Default Behavior
* All fields are filterable by default when no explicit configuration is specified.
4. Improved End-User Experience
* Users see only meaningful fields in filter lists, which leads to faster and more accurate data filtering.
5. Error Handling
* Excluding or including non-existent columns does not cause run-time errors, as the grid automatically ignores invalid configuration.
### Configure Filtering Capabilities
Configure **FullTextFilterBehavior** to filter only the specified text, numeric or Boolean columns
#### **1\. Add a Search Box and Filtering Options in XAML**
Include the necessary input controls and checkboxes for the filter options:
```xml
```
#### **2\. Apply FullTextFilterBehavior to FlexGrid and Bind to Filter Options**
Apply the behavior to the FlexGrid and bind the properties to the controls defined in the previous step:
```xml
```
#### **3\. Specify Columns for Filtering Using C\#**
In the code-behind file, define and populate the FilteredFields collection with the names of the columns that should support filtering:
```auto
public sealed partial class MainWindow : Window
{
public IEnumerable FilteredFields { get; }
public MainWindow()
{
this.InitializeComponent();
root.DataContext = new SampleData();
// Include only relevant text/numeric columns
FilteredFields = new[]
{
GridView.ColumnHeaders.Columns[0].ColumnName, // Name
GridView.ColumnHeaders.Columns[1].ColumnName, // Country
GridView.ColumnHeaders.Columns[2].ColumnName // Optional numeric column
};
}
}
```
* Enter search terms in the search box.
* Verify that the data in preferred columns is filtered.