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Ok but how do I put that button in the PropertyGrid??
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Hello !
When a condition is true I want to make all the controls inside a groupbox not usable by users but without disabling them.
This is the code I use :
Class NW
Inherits NativeWindow
Public Sub New(hwnd As IntPtr)
AssignHandle(hwnd)
End Sub
Const WM_NCHITTEST As Integer = &H84
Protected Overrides Sub WndProc(ByRef m As Message)
If m.Msg = WM_NCHITTEST Then
Return
End If
MyBase.WndProc(m)
End Sub
End Class
Dim nwss As List(Of NW) = Nothing
Public Sub block_area(flag As Boolean)
If flag = True AndAlso IsNothing(nwss) Then
nwss = New List(Of NW)()
For Each c As Control In GroupBox1.Controls
nwss.Add(New NW(c.Handle))
Next
Else
If flag = False And (Not IsNothing(nwss)) Then
For Each nw As Object In nwss
nw.ReleaseHandle()
Next
nwss = Nothing
End If
End If
End Sub
The problem is that this code works for all controls , except the TextBox and DateTimePicker. These 2 controls remain always clickable and editable.
What's wrong ?
Thank you !
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Try enable and / or readonly
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Sorry , but I have posted a code. I have some reasons to not use disable / readonly.
Can you give me a solution for my code ?
Thank you !
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login codes with reset password option using sql server 2008
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If you're looking for someone to just give you code or a finished project you've come to the wrong place.
If you've got specific questions about code you are writing, ask away, but we're not going to do your work for you.
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Hello !
Is there any way to detect if any of the controls inside a TableLaoutPanel is clicked ?
( I mean without using Click event for each control ).
I try using MouseClick's event of TableLayoutPanel , but this doesn't fire when a control is clicked.
Thank you !
modified 5-Apr-15 23:47pm.
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You need to add an event handler which is connected to each control.
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Ok , but what is going to handle this event ?
Because if he's going to handle the click action , this is the same as using all control's click event.
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Yes. You have to wire up the Click event of each control to a central Click handler to do what you want.
It seems like your concern is based on the assumption that only one handler can be assigned to the Click event. That is NOT the case. Multiple handlers can be assigned to the same event and they will all get executed.
So, you CAN have your general Click event handler for every control that you want to be notified for and you can have individual Click handlers for each control for specific functionality for whatever a certain button, or whatever controls, is going to do when clicked.
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sorry , but I have a central Click event.
The problem is that the code inside the click event is depending from the case where the click event is fired from user action ( so a user has clicked ) , or is fired from code.
I can't distinguish these 2 cases , then I ask if is possible to detect a click fro the TableLayoutPanel in general.
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Again, the TableLayoutPanel is NOT a control you can click on. It is an extension to other controls where it adds properties to them to change the way they layout in their parent container, such as a Form or Panel.
There is no way to differentiate where a Click event came from. It's always going to be from the button itself.
If you're kicking off a Click event from code, you're doing it wrong. Move the code from inside the event handler into it's own method and call it from both your code and from the Click event handler.
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What's the trouble with using all control's click event?
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The problem is that the code inside the click event is depending from the case where the click event is fired from user action ( so a user has clicked ) , or is fired from code.
I can't distinguish these 2 cases , then I ask if is possible to detect a click fro the TableLayoutPanel in general.
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I would say this is the point where you should ask yourself "why is this getting weird?" - and my answer would be "because a previous design decision was wrong/not optimal". I wouldn't trigger the Click-event programmatically. Instead I would move the code from the Click-Eventhandler into a separate method with a parameter that indicates whether it's being called from the Click-Eventhandler (= by a user-click) or from code:
SomeButton.Click += SomeButtonClicked;
void SomeButtonClicked(object sender, EventArgs e)
{
DoStuff(userClicked: true);
}
void SimulateButtonClick()
{
DoStuff(userClicked: false);
}
void DoStuff(bool userClicked)
{
if (userClicked)
else
}
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Thank you , but the situation it's a little complicated and I can't use your solution.
I have another Event let's say Event2 that is fired when the button's click event is executed. But this event2 can be fired even without button's click event but from another action. And if this case is true , inside the event2 button's click event is called from code. So the events are depending to each other , and I can't find other way but only to distinguish that the click's event is fired by user click or by code.
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I'm thinking , is possible that when I call the click event from code , to insert an special argment on its Args , and inside the click event to check this arg ?
Can this be done ?
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Sure, either object sender or EventArgs e or both. I try to avoid doing that because I find it a bit messy but it'll work.
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I don't want to change the sender because I need this. Can you explain to me , how can pass a special argument and to check on the code inside ?
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Just derive your custom class from EventArgs that carries your custom arguments. Then check in the called eventhandler for the type of e and cast it to your custom class if it is the same.
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Not very clear for me. Please could you write some code ?
Thank you !
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Ehm. Yes. Just realized we're in the VB-Forum. Can you read C# ? Because I'm not good at writing VB 
class MyEventArgs : EventArgs
{
public string Foo { get; private set; }
public MyEventArgs(string foo)
{
Foo = foo;
}
}
class MyButton : Button
{
public void SimulateClick(string foo)
{
base.OnClick(new MyEventArgs(foo));
}
}
void SomeEventhandler(object sender, EventArgs e)
{
if(e is MyEventArgs)
{
string foo = ((MyEventArgs)e).Foo;
}
else
{
}
}
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Thank you , I understand your code.
But I have a last question :
Is it possible not to use your class , but this idea :
When I call the Button's click event from code , I use this instruction :
myButton_Click(myButton, EventArgs.Empty)
Now when this event is fired from a real user click , the EventsArg is empty or not ?
Because if is not empty , I can just test inside the click event , if eventArgs is empty or not ?
Can this idea work ?
Thank you !
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