Migrating 'Handles' from VB.NET to C#
13,374
I recommend using the Telerik Code Converter as a start.
C# does not have that easy automatic attaching of event handlers by means of the "Handles" keyword like VB.NET does.
//EventHandler declaration
public event EventHandler DataLoaded;
protected void Mag_Button_Load_Click(object sender, EventArgs e)
{
//Raise Event
if (DataLoaded != null) {
DataLoaded(this, EventArgs.Empty);
}
}
Also, You need to assign your event handlers to the objects like this:
Button1.Click += Button1_Click;
protected void Button1_Click(object sender, EventArgs e)
{
//do something.
}
However C# does have the succinct ability of doing this as well:
Button1.Click += (sender, e)=>
{
//do something
}
Author by
pistacchio
Updated on July 19, 2022Comments
-
pistacchio almost 2 years
I'm migrating some code from VB.NET to C# (3.5).
I find structures like:
Public Event DataLoaded(ByVal sender As Object, ByVal e As EventArgs) Protected Sub Mag_Button_Load_Click(ByVal sender As Object, ByVal e As EventArgs) Handles Mag_Button_Load.Click [..] RaiseEvent DataLoaded(Me, EventArgs.Empty) End Sub [..] 'Other Class Private Sub LoadData(ByVal sender As Object, ByVal e As System.EventArgs) Handles oData.DataLoaded [..] End Sub
What is the most straightforward way to translate such behaviour to C#?
-
Jon Skeet about 15 yearsI think you've either forgotten the => for a lambda expression in the last piece of code (or the delegate keyword and parameter types for an anonymous method).
-
Zev Spitz over 10 yearsAdding lambda expressions to events can be done in VB.NET as well, with the following monstrosity:
AddHandler Button1.Click, Sub (sender,e) 'do something here
, orAddHandler Button1.Click, Sub (sender,e) 'do something here over multiple lines' End Sub