ToInt32 txtAge. Text ; stu. Click F5 to run the application and fill in the input fields; then, click Save. Please find the below screenshots. Note Here, we are not validating the input fields. If you want, you can validate these. To update the record, we have to select the record from data GridView.
Here, I have written datagridview cell click event to get the values from datagridview to fields. Note We have to select the record from datagridview for update and delete. The same event will help us to get the records. ToString ; txtName. ToString ; txtAge. ToString ; txtCity. ToString ; cmbGender.
ToInt32 lblID. Text , txtName. Text, Convert. Text , txtCity. Text, cmbGender. Please find some external methods we have used here. Show "Saved Successfully!..
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Add a using directive for System. Entity to bring the Load extension method into scope:. This represents the NorthwindEntities object that you selected when you created the model.
You added that already, so you don't need it here. Press F5. You should see the details for the first customer that was retrieved into the CollectionViewSource. You should also see their orders in the data grid. The formatting isn't great, so let's fix that up. You can also create a way to view the other records and do basic CRUD operations. The default arrangement produced by Visual Studio is not ideal for your application, so we'll provide the final XAML here to copy into your code.
You also need some "forms" which are actually Grids to enable the user to add a new customer or order. In order to be able to add a new customer and order, you need a separate set of text boxes that are not data-bound to the CollectionViewSource. You'll control which grid the user sees at any given time by setting the Visible property in the handler methods.
Finally, you add a Delete button to each row in the Orders grid to enable the user to delete an individual order. First, add these styles to the Windows. Resources element in MainWindow. In Windows Forms applications, you get a BindingNavigator object with buttons for navigating through rows in a database and doing basic CRUD operations.
WPF does not provide a BindingNavigator, but it is easy enough to create one. You do that with buttons inside a horizontal StackPanel, and associate the buttons with Commands that are bound to methods in the code behind. There are four parts to the command logic: 1 the commands, 2 the bindings, 3 the buttons, and 4 the command handlers in the code-behind.
First, add the commands in the MainWindow. Resources element:. Add this CommandBindings element after the Windows. Resources closing tag:. Now, add the StackPanel with the navigation, add, delete, and update buttons. First, add this style to Windows. Resources :. The code-behind is minimal except for the add and delete methods. Navigation is performed by calling methods on the View property of the CollectionViewSource.
The DeleteOrderCommandHandler shows how to perform a cascade delete on an order. The UpdateCommandHandler adds a new customer or order to the collection, or else just updates an existing customer or order with the changes that the user made in the text boxes.
Add these handler methods to the MainWindow class in MainWindow. If your CollectionViewSource for the Customers table has a different name, then you need to adjust the name in each of these methods:.
To start debugging, press F5. You should see customer and order data populated in the grid, and the navigation buttons should work as expected.
Click on Commit to add a new customer or order to the model after you have entered the data.
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