# FilterInstruction Class

> The FilterInstruction class is used to filter merge block data by certain conditions before merging. A filter instruction represents a condition which must be fulfilled by the content of a data row in a data table to execute a certain merge action. It uses a relational operator such as "is equal to" or "is greater than" to compare a given value to the contents of a specified data row column. This class is used in class MergeBlockInfo to determine if a merge block should be merged at all, for example. Multiple filter instructions can be logically concatenated using "and" and "or" operators.

- **Product:** TX Text Control .NET for Windows Forms
- **Section:** Reference
- **Kind:** Class
- **Introduced:** 26.0
- **Namespace:** `TXTextControl.DocumentServer.DataShaping`
- **Package:** `TXTextControl.TextControl.WinForms.SDK` (assembly `TXDocumentServer.dll`, from the private NuGet feed or Text Control Offline Packages)
- **.NET Framework:** reference `TXDocumentServer.dll` from the setup
- **Path:** TX Text Control .NET for Windows Forms > Reference > TXTextControl.DocumentServer.DataShaping > FilterInstruction Class
- **Web URL:** https://docs.textcontrol.com/tx-text-control-dotnet-winforms/reference/txtextcontrol-documentserver-datashaping/filterinstruction/
- **LLMs URL:** https://docs.textcontrol.com/tx-text-control-dotnet-winforms/reference/txtextcontrol-documentserver-datashaping/filterinstruction/llms.txt
- **LLMs-Full URL:** https://docs.textcontrol.com/tx-text-control-dotnet-winforms/reference/txtextcontrol-documentserver-datashaping/filterinstruction/llms-full.txt

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## On This Page

- [Description](https://docs.textcontrol.com/tx-text-control-dotnet-winforms/reference/txtextcontrol-documentserver-datashaping/filterinstruction/#description)
- [Syntax](https://docs.textcontrol.com/tx-text-control-dotnet-winforms/reference/txtextcontrol-documentserver-datashaping/filterinstruction/#syntax)
- [Examples](https://docs.textcontrol.com/tx-text-control-dotnet-winforms/reference/txtextcontrol-documentserver-datashaping/filterinstruction/#examples)
- [Members](https://docs.textcontrol.com/tx-text-control-dotnet-winforms/reference/txtextcontrol-documentserver-datashaping/filterinstruction/#members)

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## In This Section

- [FilterInstruction.ColumnName Property](https://docs.textcontrol.com/tx-text-control-dotnet-winforms/reference/txtextcontrol-documentserver-datashaping/filterinstruction/columnname-property/llms.txt): Gets or sets the name of the table column whose content this merge condition is compared to.
- [FilterInstruction.CompareTo Property](https://docs.textcontrol.com/tx-text-control-dotnet-winforms/reference/txtextcontrol-documentserver-datashaping/filterinstruction/compareto-property/llms.txt): Gets or sets the value the table column content is compared to using the specified comparison operator. If this value can be parsed to a numerical value, a numerical comparison is used internally when possible (i. e. when the table column contains numerical values, too). Otherwise the column content and this value are interpreted as / converted to strings.
- [FilterInstruction.ComparisonOperator Property](https://docs.textcontrol.com/tx-text-control-dotnet-winforms/reference/txtextcontrol-documentserver-datashaping/filterinstruction/comparisonoperator-property/llms.txt): Gets or sets the relational operator used as the comparison operator. See the description of the constructor of this class for possible values.
- [FilterInstruction Constructor](https://docs.textcontrol.com/tx-text-control-dotnet-winforms/reference/txtextcontrol-documentserver-datashaping/filterinstruction/constructor/llms.txt): Initializes a new instance of the FilterInstruction class.
- [FilterInstruction.Culture Property](https://docs.textcontrol.com/tx-text-control-dotnet-winforms/reference/txtextcontrol-documentserver-datashaping/filterinstruction/culture-property/llms.txt): Gets or sets the format provider for numerical value comparison. The default value for this property is the invariant culture.
- [FilterInstruction.LogicalOperator Property](https://docs.textcontrol.com/tx-text-control-dotnet-winforms/reference/txtextcontrol-documentserver-datashaping/filterinstruction/logicaloperator-property/llms.txt): Gets or sets the logical operator by which to logically connect a filter instruction to the previous one if a filter consists of a collection of multiple filter instructions. Possible values are listed in the description of the constructor of this class.

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## Nearby

- **Previous:** [TXTextControl.DocumentServer.DataShaping namespace](https://docs.textcontrol.com/tx-text-control-dotnet-winforms/reference/txtextcontrol-documentserver-datashaping/llms.txt)
- **Next:** [FilterInstruction.ColumnName Property](https://docs.textcontrol.com/tx-text-control-dotnet-winforms/reference/txtextcontrol-documentserver-datashaping/filterinstruction/columnname-property/llms.txt)