WPF Data Grid – Display Custom Text in Cells Based on a Condition

In this example, the GridControl changes cell display text when a specific condition is met.

If the Discount value is greater than 20, the grid appends (SALE) to the Product Name.

Use this technique when you need to:

• Add labels or status markers to cell values.
• Update cell text dynamically while the original data remains unchanged.
• Improve readability and highlight key values.

Implementation Details

The example includes code-behind and MVVM techniques.

Code-Behind

Handle the CustomColumnDisplayText event to replace or extend the text displayed in a cell based on custom conditions.

void grid_CustomColumnDisplayText(object sender, CustomColumnDisplayTextEventArgs e) {
    if (e.Column.FieldName == "ProductName") {
        decimal discount = (decimal)e.GetCellValue("Discount");
        if (discount > 20)
            e.DisplayText += " (SALE)";
    }
}

MVVM

Bind the CustomColumnDisplayTextCommand to a view model command to change the text displayed in a cell based on custom conditions.

public void OnCustomColumnDisplayText(CustomColumnDisplayTextEventArgs e) {
    if (e.Column.FieldName == "ProductName") {
        decimal discount = (decimal)e.GetCellValue("Discount");
        if (discount > 20)
            e.DisplayText += " (SALE)";
    }
}

Files to Review

Code-Behind

• MainWindow.xaml (VB: MainWindow.xaml)
• MainWindow.xaml.cs (VB: MainWindow.xaml.vb)

MVVM

• MainWindow.xaml (VB: MainWindow.xaml)
• MainViewModel.cs (VB: MainViewModel.vb)

Documentation

• GridControl
• Format Cell Values
• GridControl.CustomColumnDisplayText
• GridControl.CustomColumnDisplayTextCommand

More Examples

• Display Custom Text Within Data Cells and Groups
• Apply Custom Rules to Group Rows

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