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Expression Editor Customization

You can customize the Expression Editor. For example, the image below shows the expression editor with the following changes:

  • The Columns category is renamed to Fields.
  • The Now function is removed from the date-time functions list.


Perform the following steps to customize the expression editor:

  1. Handle the DataViewBase.UnboundExpressionEditorCreated (or PivotGridControl.UnboundExpressionEditorCreated) event.
  2. Use one of the following properties to obtain the expression editor:

  3. Specify the required expression editor’s properties.

The following code sample demonstrates how to customize the AutoComplete expression editor as shown in the image above:

      <dxg:TableView UnboundExpressionEditorCreated="OnUnboundExpressionEditorCreated" />
void OnUnboundExpressionEditorCreated(object sender, UnboundExpressionEditorEventArgs e) {
   var expressionEditorContext = e.AutoCompleteExpressionEditorControl.Context;   
   var nowFunction = expressionEditorContext.Functions.FirstOrDefault(f => string.Equals(f.Name, "now", StringComparison.OrdinalIgnoreCase));
   if (nowFunction != null) {
   foreach (var columnInfo in expressionEditorContext.Columns) {
      columnInfo.Category = "Fields";
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