Filter Control

• Aug 01, 2019
• 4 minutes to read

This topic contains the following sections.

• How to invoke the filter control
• How to specify visibility of filter control elements
• Visibility of filter operators

The filter control allows end-users to build complex filter criteria with an unlimited number of filter conditions, combined by logical operators.

How to Invoke the Filter Control

The filter control can be invoked by clicking the filter image or filter expression displayed in the filter bar, whose visibility is controlled by the ASPxGridSettings.ShowFilterBar property.

The ASPxGridSettings.ShowFilterBar property can be set to the following values.

• Hidden - The filter bar is always hidden.
• Visible - The filter bar is always visible.
• Auto - The filter bar is shown displayed when grid data is filtered (e.g., by the header filter).

You can show and hide the filter control in code using the following methods.

Action	Client-side methods	Server-side methods
Show	ASPxClientVerticalGrid.ShowFilterControl	ASPxGridBase.ShowFilterControl
Hide	ASPxClientVerticalGrid.CloseFilterControl	ASPxGridBase.HideFilterControl

How to Specify Visibility of Filter Control Elements

Row Visibility

By default, the filter control allows end-users to create filter criteria with rows that are visible in the grid. Set the ASPxGridFilterControlSettings.ShowAllDataSourceColumns property to true to display all rows from the data source in the filter control (even if these rows are not visible in the grid).

The filter control can display hierarchical rows provided that the ASPxGridFilterControlSettings.AllowHierarchicalColumns property is set to true. In this case, you can use the ASPxGridFilterControlSettings.MaxHierarchyDepth property to limit the max hierarchy depth level.

Tab Visibility

End-users can create filter criteria using visual representation (Visual tab) or by typing the criteria as text (Text tab). The content of the tabs is automatically synchronized. Note that the Text tab is disabled by default, and the Visual tab header is not displayed. Set the ASPxGridFilterControlSettings.ViewMode property to VisualAndText to enable them.

Group Operator Visibility

You can control the visibility of group operators displayed in the drop-down menu using the ASPxGridFilterControlSettings.GroupOperationsVisibility property.

Operand Type Button Visibility

The operand type button allows end-users to switch a filter condition between two modes:

• Comparing a field’s value to a specified criteria value.

  

• Comparing fields values to each other. For example, filtering records where the “Units in stock” field value is greater than the “Units on order” one.

  

The button visibility is controlled by the ASPxGridFilterControlSettings.ShowOperandTypeButton property.

Visibility of Filter Operators

The filter control drop-down window displays different comparison operators based on the row data type. The table below lists comparison operator visibility for different row types.

Filter Comparison Operator	String Row*	ComboBox Row	Binary Image Row	Date Row	Other Type Row(Numbers, etc.)
Equals	yes	yes (default value)	no	yes (default value)	yes
Does not equal	yes	yes	no	yes	yes
Is greater than	yes	no	no	yes	yes (default value)
Is greater than or equal to	yes	no	no	yes	yes
Is less than	yes	no	no	yes	yes
Is less than or equal to	yes	no	no	yes	yes
Is between	yes	no	no	yes	yes
Is not between	yes	no	no	yes	yes
Contains	yes	no	no	no	no
Does not contain	yes	no	no	no	no
Begins with	yes (default value)	no	no	no	no
Ends with	yes	no	no	no	no
Is like	yes	no	no	no	no
Is not like	yes	no	no	no	no
Is blank	yes	yes	no	yes	yes
Is not blank	yes	yes	yes (default value)	yes	yes
Is any of	yes	yes	yes	yes	yes
Is none of	yes	yes	no	yes	yes
Date operators**	no	no	no	yes	no

*A string row is a row containing string values or a row whose GridDataColumnSettings.FilterMode property is set to DisplayText.

**For date rows, the filter control displays an additional list of date operators.