Datagridviewcheckboxcolumn cellvalidating

08 May

The below sample demonstrates how you can set a cell’s padding in the Cell Validating event to provide spacing for the error icon.Since padding by default affects the location of the error icon the sample uses the Cell Painting to move the position of the icon for painting.This new layer provides wrappers for all of the Table Adapter methods, and then adds business-logic to these wrapper-methods.So data-access is achieved entirely through the BLL rather than the underlying DAL.Nonetheless, everything that is demonstrated in this tutorial is still relevant even if you decide to extend Table Adapters and build a separate BLL, or take some other approach.Note: We can still add queries or stored procedures to Table Adapters, which become methods we can call (via helper-methods), without having to explicitly extend a Table Adapter.

The below example uses the Northwind database to display related data from the Territory and Region tables (a territory is in a specific region.) Using the category and subcategory concept, the Region is the category and the Territory is the subcategory.A web-page posts data, or submits a request, that the server processes.The server performs this processing with the Table Adapters.MSDN links: How to: Extend the Functionality of a Dataset How to: Extend the Functionality of a Table Adapter Validating Data in Datasets Walkthrough: Adding Validation to a Dataset Walkthrough: Handling Errors that Occur During Data Entry in the Windows Forms Data Grid View Control The following tutorials are for ASP. Creating a Data Access Layer Creating a Business Logic Layer These concentrate on extending the Table Adapters.The second link creates an entirely new BLL (Business Logic Layer) to sit between the Presentation and Data Access Layers.