# MailMerge.FormFieldMergeType Property

> Specifies in which manner form fields are treated during the merge process. Form fields can either be ignored, preselected or replaced with a value from the data source. The default value is FormFieldMergeType.None which means that form fields are completely unaffected by the merge process.

- **Product:** TX Text Control .NET Server
- **Section:** Reference
- **Kind:** Property
- **Introduced:** 30.0
- **Namespace:** `TXTextControl.DocumentServer`
- **Package:** `TXTextControl.TextControl.Core.SDK` (assembly `TXDocumentServer.Core.dll`, from the private NuGet feed or Text Control Offline Packages)
- **Package:** `TXTextControl.TextControl.ASP.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 Server > Reference > TXTextControl.DocumentServer > MailMerge.FormFieldMergeType Property
- **514 words**
- **Web URL:** https://docs.textcontrol.com/tx-text-control-dotnet-server/reference/txtextcontrol-documentserver/mailmerge/formfieldmergetype-property/
- **LLMs URL:** https://docs.textcontrol.com/tx-text-control-dotnet-server/reference/txtextcontrol-documentserver/mailmerge/formfieldmergetype-property/llms.txt
- **LLMs-Full URL:** https://docs.textcontrol.com/tx-text-control-dotnet-server/reference/txtextcontrol-documentserver/mailmerge/formfieldmergetype-property/llms-full.txt

---

### Description

Specifies in which manner form fields are treated during the merge process. Form fields can either be ignored, preselected or replaced with a value from the data source. The default value is `FormFieldMergeType.None` which means that form fields are completely unaffected by the merge process.

### Syntax

```csharp
public FormFieldMergeType FormFieldMergeType { get; set; }
```

```vbnet
Public Property FormFieldMergeType As FormFieldMergeType
```

### Members

| Value | Description |
|---|---|
| None | Form fields are not merged at all. |
| Preselect | Form field content is preselected when possible. Form fields not associated with a data table column are unaffected. |
| Replace | Form fields are replaced with database content. Empty form fields are removed according to property [MailMerge.RemoveEmptyFields](https://docs.textcontrol.com/tx-text-control-dotnet-server/reference/txtextcontrol-documentserver/mailmerge/removeemptyfields-property/llms-full.txt). |

### Examples

The following example uses `MailMerge.FormFieldMergeType` to configure form field merge type as part of the mail merge workflow. The configured value is checked before the workflow continues.

```csharp
mailMerge.FormFieldMergeType = TXTextControl.DocumentServer.FormFieldMergeType.Preselect;
Console.WriteLine($"Form Field Merge Type used by Mail Merge: {mailMerge.FormFieldMergeType}");
```

```vbnet
mailMerge.FormFieldMergeType = TXTextControl.DocumentServer.FormFieldMergeType.Preselect
Console.WriteLine($"Form Field Merge Type used by Mail Merge: {mailMerge.FormFieldMergeType}")
```

---

## Nearby

- **Previous:** [MailMerge.FormFieldMergedEventArgs.TableCell Property](https://docs.textcontrol.com/tx-text-control-dotnet-server/reference/txtextcontrol-documentserver/mailmerge-formfieldmergedeventargs/tablecell-property/llms-full.txt)
- **Next:** [MailMerge.FrameMergedEventArgs Class](https://docs.textcontrol.com/tx-text-control-dotnet-server/reference/txtextcontrol-documentserver/mailmerge-framemergedeventargs/llms-full.txt)