Because Is Valid = true on in case of checked checkbox and once it set to 'true' then it'll not false until at the end of the loop.I've got a Check Box List control that I want to require the user to check at least ONE box, it does not matter if they check every single one, or 3, or even just one.The "Add New Item" dialog will pop up with default class selected.
Step 1 - Database part Created a sample database with the name “All Sample Code” for showing the demo. We are going to name the class as Database Context and click on Add button.
Inside this database, I have added a Category table. After adding a Database Context class, next we are going to inherit Db Context class.
I'm not a Java Script guru so I did not implement or even thought about how to implement the client side validation.
On the aspx file you can now work with the Validateable Check Box List just like you would with a plain Text Box.
Nothing to install and it will be full supported in the next version of Visual Studio I think.
Check out this article from 4 Guys From Rolla: show you how to create a validator for the Check Box and Check Box List controls that works exactly like the Required Field Validator for the other . It has the server side validation and the client side validation.In the spirit of asp.net's validation controls, what can I use to enforce this?I'm also using the Ajax validation extender, so it would be nice if it could look like other controls, and not some cheesy server validate method in the codebehind. The below dialog of Nu Get Package Manager will pop up. After adding reference, the next step is to add a connection string in file. Step 3 - Installing package for EF Core, from Nu Get To install the package, just right click on the project (MVCCore2) and then, select "Manage Nu Get package". Step 4 - Adding connection string and setting up Db Context.In this article, we are creating a simple Check Box List in ASP. For creating this Check Box list, we are going to pull data from the SQL Server database using Entity Framework Core. Inside that, from the left pane, choose Installed . For adding a folder, just right click on the project (MVCCore2), choose "Add" from menu that pops up, and choose New Folder inside that. Now, let’s add a class with name Database Context in Models folder.