# Nested Blocks and Master-Detail Reports

> Build master-detail reports in Windows Forms with nested merge blocks: the Field Navigation sidebar, ChildBlocks, nested JSON and objects, DataSet relations.

- **Product:** TX Text Control .NET for Windows Forms
- **Section:** Documentation
- **Kind:** Topic
- **Path:** TX Text Control .NET for Windows Forms > Mail Merge and Reporting > Nested Blocks and Master-Detail Reports
- **Web URL:** https://docs.textcontrol.com/tx-text-control-dotnet-winforms/mail-merge/nested-blocks/
- **LLMs URL:** https://docs.textcontrol.com/tx-text-control-dotnet-winforms/mail-merge/nested-blocks/llms.txt
- **LLMs-Full URL:** https://docs.textcontrol.com/tx-text-control-dotnet-winforms/mail-merge/nested-blocks/llms-full.txt

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## On This Page

- [How Nested Blocks Work](https://docs.textcontrol.com/tx-text-control-dotnet-winforms/mail-merge/nested-blocks/#how-nested-blocks-work)
- [Shape the Nested Data](https://docs.textcontrol.com/tx-text-control-dotnet-winforms/mail-merge/nested-blocks/#shape-the-nested-data)
- [Design Nested Blocks in the Reporting Tab](https://docs.textcontrol.com/tx-text-control-dotnet-winforms/mail-merge/nested-blocks/#design-nested-blocks-in-the-reporting-tab)
- [Create Nested Blocks in Code](https://docs.textcontrol.com/tx-text-control-dotnet-winforms/mail-merge/nested-blocks/#create-nested-blocks-in-code)
- [Check the Block Hierarchy](https://docs.textcontrol.com/tx-text-control-dotnet-winforms/mail-merge/nested-blocks/#check-the-block-hierarchy)
- [Merge Nested Business Objects](https://docs.textcontrol.com/tx-text-control-dotnet-winforms/mail-merge/nested-blocks/#merge-nested-business-objects)
- [Merge a DataSet With Relations](https://docs.textcontrol.com/tx-text-control-dotnet-winforms/mail-merge/nested-blocks/#merge-a-dataset-with-relations)
- [Repeat Table Headers per Block](https://docs.textcontrol.com/tx-text-control-dotnet-winforms/mail-merge/nested-blocks/#repeat-table-headers-per-block)
- [Handle Levels Without Data](https://docs.textcontrol.com/tx-text-control-dotnet-winforms/mail-merge/nested-blocks/#handle-levels-without-data)
- [Next Steps](https://docs.textcontrol.com/tx-text-control-dotnet-winforms/mail-merge/nested-blocks/#next-steps)

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## Nearby

- **Previous:** [Merge Blocks](https://docs.textcontrol.com/tx-text-control-dotnet-winforms/mail-merge/blocks/llms.txt)
- **Next:** [Subtemplates](https://docs.textcontrol.com/tx-text-control-dotnet-winforms/mail-merge/subtemplates/llms.txt)