Afterwards, you should have a fully-functional program that will allow you to view the data in the Data Table. When an input error occurs, there will be a little red exclamation point at that cell location.However, you'll need to add a button and one line of code to be able to save changes back to the database. Load 'TODO: This line of code loads data into the 'North Wind Data Set. If the user hovers over the red "eye ball" (it kinda looks like a lower-case "i") they will see the reason why the input was rejected. Cancel" method with some caution, as it will "lock down" the Data Grid View control, and not let the user move to any other row (or switch to any other control) until after the error is fixed.A Column control that inherits from Data Grid View Column, a Cell control that inherits from Data Grid View Text Box Cell, and an Editing Control that implements the IData Grid View Editing Control interface The Masked Edit Column class is fairly straight forward; it only overrides one property (to ensure that the correct cell type it used).
Click on this triangle to select the data source that was created for you when you ran the Data Source Conversion Wizard. You can use the Error Provider class to display the problems detected during validation.This technique provides an enhancement to the Data Grid View control that further affirms the notion that you should always attempt to prevent user input errors rather than just detect them.This custom Data Grid View column control is contained in 3 classes...Can I use Data Grid View Row Validating to update cells? What would be the correct way for me to fill in hidden key information and to calculate some cell values?
The Data Grid View is a very powerful windows form control for providing a user interface to tabular data.
The source code for the custom Data Grid View Masked Edit Column is found below.