Input Validation

• Jan 10, 2024
• 2 minutes to read

You can validate new data before saving it to a data source. Likewise, you can ensure that invalid data is not saved to a data source and related errors are clearly displayed.

Note

When you use a custom CellTemplate, input validation is supported only if the template contains a BaseEdit class descendant that is declared as demonstrated in the following topic: Custom In-Place Cell Editors.

GridControl Level

The GridControl raises special events that allow you to validate modified cells and rows:

• Cell Validation
• Row Validation

Data Level

You can validate data based on interfaces and attributes:

• Interface-Based Validation
• Attribute-Based Validation

Check Whether the Grid Contains Validation Errors

The GridControl includes the following properties that allow you to check whether the grid has validation errors:

• The DataViewBase.HasValidationError property discloses whether the GridControl contains validation errors that do not allow users to post changes to a data source. Use this property when you implement validation at the GridControl level.
• The DataViewBase.HasErrors property (along with the DataViewBase.ErrorsWatchMode property) discloses whether the GridControl contains validation errors posted to a data source. Use this property when you implement validation at the data level.

Examples

• How to: Validate Data Rows and Indicate Errors
• How to: Validate Cell Editors
• How to: Implement an Edit Cell Confirmation
• How to: Implement Attribute-Based Validation