# Limitations

## Content

| **<span class="resizer-hover-zone">Area</span>** | **<span class="resizer-hover-zone">Limitation</span>** |
| ---- | ---------- |
| <span class="resizer-hover-zone">Code generation</span> | <span class="resizer-hover-zone">Data Wizard generates C# code only.</span> |
| <span class="resizer-hover-zone">Designer support</span> | <span class="resizer-hover-zone">Data binding to UI controls is limited to WinForms designer.</span> |
| <span class="resizer-hover-zone">Supported controls</span> | <span class="resizer-hover-zone">Data binding is supported for C1FlexGrid and DataGridView controls only.</span> |
| <span class="resizer-hover-zone">Connections</span> | <span class="resizer-hover-zone">Supports one connection per project. </span>See [Adding a Connection.](/componentone/docs/services/online-datawizard/features/working-with-connections) |
| <span class="resizer-hover-zone">Joins</span> | <span class="resizer-hover-zone">The Query Builder supports INNER joins only. </span>See [Creating Joins](/componentone/docs/services/online-datawizard/features/query-builder). |
| <span class="resizer-hover-zone">Connection editing</span> | <span class="resizer-hover-zone">An existing connection cannot be edited. </span>See [Working with Connections](/componentone/docs/services/online-datawizard/features/working-with-connections). |
| <span class="resizer-hover-zone">Data View names</span> | <span class="resizer-hover-zone">A Data View name cannot be changed after creation. </span>See [Working with Data Views](/componentone/docs/services/online-datawizard/features/working-with-data-views). |
| <span class="resizer-hover-zone">Enum columns</span> | <span class="resizer-hover-zone">OData and PostgreSQL columns with an enum data type are not supported for Entity Framework connections. These columns are hidden in the </span>[Query Builder](/componentone/docs/services/online-datawizard/features/query-builder)<span class="resizer-hover-zone">.</span> |

For supported environments and project requirements, see [Installing Data Wizard](/componentone/docs/services/online-datawizard/quick/installing-data-wizard). For supported data sources and license requirements, see [Supported Connectors](/componentone/docs/services/online-datawizard/features/working-with-connections).