.Net ToolStripMenuItem - how to access click-event for items generated while form is being loaded (in runtime)
I have a form which upon its loading events retrieves data and populates some menu-items. I am adding menu-items using
Viewer.AudioTrackToolStripMenuItem.DropDownItems.Add(myValue)
The number of menu-items created are not always the same. Sometimes they are 2, other times they are 4 depending on the data being retrieved.
Since the menu-items are created during "run-time", how can I now intercept when a user click/select a menu-item (I mean I don't know the name of the control and its click-event). If the menu-items were known before-hand, I would simply create the menu-item in design-time and I would have my click-event but now I don't.
Any help would be appreciated. Thank you.
Edit: you got me on track but I still got some error-messages. Just to clarify, the code is as follows:
myValue = TextBetween(value1, "s|", "|e") 'myValue is the result of a function
'where myValue is a string
myValue.click += New System.EventHandler(myValue_Click) 'ERROR
Me.AudioTrackToolStripMenuItem.DropDownItems.Add(myValue)
Now if I run the code I get the following errors:
1) 'click' is not a member of 'String'
2) Delegate 'System.EventHandler' requires an 'AddressOf' expression or lambda expression as the only argument to its constructor.
Could above errors be because my menu-i开发者_如何学Ctems are named in accordance with a result from a variable (myValue)?
edit2: I got everything working by using the following code:
Dim menuItem As ToolStripMenuItem
myValue = TextBetween(value1, "s|", "|e")
menuItem = New ToolStripMenuItem(myValue)
Me.AudioTrackToolStripMenuItem.DropDownItems.Add(MenuItem.ToString, Nothing, AddressOf ToolStripMenuItem_Click)
then I added the following sub:
Private Sub ToolStripMenuItem_Click(ByVal sender As System.Object, ByVal e As System.EventArgs)
Dim menuItem As ToolStripMenuItem = TryCast(sender, ToolStripMenuItem)
If menuItem IsNot Nothing Then
'item just clicked.
MessageBox.Show(menuItem.Text)
End If
End Sub
Define myvalue_click method to handle all myValue clicks. Add event handles programmatically, like:
this.myValue.Click += new System.EventHandler(this.myValue_Click);
You can add the event at runtime too, e.g..
Since your myValue
is a string, you'll first need to create a button for it:
ToolStripItem toolStripItem = new ToolStripItem();
toolStripItem.Text = myValue;
toolStripItem.Click += new EventHandler(toolStripItem_Click);
Viewer.AudioTrackToolStripMenuItem.DropDownItems.Add(toolStripItem);
精彩评论