Visual Studio中的事件处理程序

Question

When I try to create an event handler eg. button click in c#, if I write the code manually in code behind class, the event handler won't be called; Whereas if I double click the button on the form and the VS auto generates the event, it will work perfectly. What is the reason behind this behavior?

Answer 1

There is a Form.Designer.cs file that hooks up the events for each individual form (each form has it's own designer file).

Open that and you'll find lines like:

button1.Click += button1_Click;

..etc.

As below:

Answer 2

Your file isnt able to know that the event handler is to be linked to the function you have created.

If you want to link manually, click on the button once, and in the top section of the properties window, you'll see a lightning symbol(events). Click on that, and scroll down to the click event, and over there, add your function.