# MailMerge.BlockMergingEventArgs.SubTextPartID Property

> Gets the ID of the subtext part that represents the block.

- **Product:** TX Text Control .NET for WPF
- **Section:** Reference
- **Kind:** Property
- **Introduced:** 33.0
- **Namespace:** `TXTextControl.DocumentServer`
- **Package:** `TXTextControl.TextControl.WPF.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 WPF > Reference > TXTextControl.DocumentServer > MailMerge.BlockMergingEventArgs.SubTextPartID Property
- **313 words**
- **Web URL:** https://docs.textcontrol.com/tx-text-control-dotnet-wpf/reference/txtextcontrol-documentserver/mailmerge-blockmergingeventargs/subtextpartid-property/
- **LLMs URL:** https://docs.textcontrol.com/tx-text-control-dotnet-wpf/reference/txtextcontrol-documentserver/mailmerge-blockmergingeventargs/subtextpartid-property/llms.txt
- **LLMs-Full URL:** https://docs.textcontrol.com/tx-text-control-dotnet-wpf/reference/txtextcontrol-documentserver/mailmerge-blockmergingeventargs/subtextpartid-property/llms-full.txt

---

### Description

Gets the ID of the subtext part that represents the block.

### Syntax

```csharp
public int SubTextPartID { get; }
```

```vbnet
Public ReadOnly Property SubTextPartID As Integer
```

### Examples

The following example includes the sub text part id value in application diagnostics. The created object is then available to the surrounding document workflow.

```csharp
Console.WriteLine($"Sub Text Part ID: {blockMergingEventArgs.SubTextPartID}");
Console.WriteLine("Block Merging Event Args is ready for use.");
```

```vbnet
Console.WriteLine($"Sub Text Part ID: {blockMergingEventArgs.SubTextPartID}")
Console.WriteLine("Block Merging Event Args is ready for use.")
```

### Limitations

Read only.

---

## Nearby

- **Previous:** [MailMerge.BlockMergingEventArgs.ColumnNames Property](https://docs.textcontrol.com/tx-text-control-dotnet-wpf/reference/txtextcontrol-documentserver/mailmerge-blockmergingeventargs/columnnames-property/llms-full.txt)
- **Next:** [MailMerge.BlockMergingEventArgs.SubTextPartNumber Property](https://docs.textcontrol.com/tx-text-control-dotnet-wpf/reference/txtextcontrol-documentserver/mailmerge-blockmergingeventargs/subtextpartnumber-property/llms-full.txt)