Textbox ReadOnly or Disabled....

Arg81 · Mar 16, 2006

Not sure whether this is one of those things you cannot get around, but here goes

When a user submits data from my data entry form, all fields become disabled (enabled=false). However, a couple of my textboxes are filled in with an amount of data, and so have vertical scrollbars.

When a textbox is disabled, the scrollbar doesn't work. It does when the textbox is readonly.

This to me isn't a problem, but the users can't see why they can click into that textbox but not enter any text (give them a colouring in book and crayons any day...

)

So my question is, is there;

a) A way to make a disabled textbox have an enabled scrollbar OR
b) Have a read-only textbox, but not be "clickable"

Regards,
Luke

kulrom · Mar 16, 2006

b) Have a read-only textbox, but not be "clickable"
How you imagine that user can see entire text/data if scrollbar is disabled but text is longer than visible part can provide ...?

Regards

Arg81 · Mar 16, 2006

What I mean is I don't want the user to be able to click into the textbox and them then think they can type - I want the textbox to be like it's disabled, you can't click into it - but I want them to be able to use the scrollbar if it's required.

It's those annoying users. If they weren't there then there'd be no problems with my apps....and I probably wouldn't have a job

kulrom · Mar 16, 2006

Ok check this out http://www.syncfusion.com/FAQ/WindowsForms/FAQ_c94c.aspx#q739q

is that what do you want?

Arg81 · Mar 16, 2006

ya mean...

27.7 How do I prevent a control from receiving focus when it receives a mouseclick?

You can set the control's Enabled property to false. This will prevent clicking but also gives the disabled look.

There is a ControlStyles.Selectable flag that determines whether the control can get focus or not. But it does not appear to affect some controls such as TextBox. But you can prevent the TextBox from getting focus by overriding its WndProc method and ignoring the mouse down.
public class MyTextBox : TextBox
{
const int WM_LBUTTONDOWN = 0x0201;

protected override void WndProc(ref System.Windows.Forms.Message m)
{
if(m.Msg == WM_LBUTTONDOWN)
return;
base.WndProc(ref m);
}
}

then yes!! But this will be the first time I've ever done some overriding, so how do I go about that?

Regards,
Luke

kulrom · Mar 16, 2006

It seems that i failed completely today giving you all these links

but i am a bit lazy so, please take a look of this article ... i think it will explain a lot of things to you
http://www.codeproject.com/useritems/OSH.asp

Regards

Arg81 · Mar 16, 2006

OK, I've tried converting this to VB but am getting stuck on;

const int WM_LBUTTONDOWN = 0x0201;

I assume in VB that is

const WM_LBUTTONDOWN as Integer = 0x0201

however, 0x0201 isn't an integer...

regards,
Luke

Arg81 · Mar 16, 2006

OK, I have now put the class together and have;

VB.NET:

[SIZE=2][COLOR=#0000ff]Public[/COLOR][/SIZE][SIZE=2] [/SIZE][SIZE=2][COLOR=#0000ff]Class[/COLOR][/SIZE][SIZE=2] MyTextBox
[/SIZE][SIZE=2][COLOR=#0000ff]Inherits[/COLOR][/SIZE][SIZE=2] TextBox
[/SIZE][SIZE=2][COLOR=#0000ff]Const[/COLOR][/SIZE][SIZE=2] WM_LBUTTONDOWN [/SIZE][SIZE=2][COLOR=#0000ff]As[/COLOR][/SIZE][SIZE=2] [/SIZE][SIZE=2][COLOR=#0000ff]Integer[/COLOR][/SIZE][SIZE=2] = 0x0201
[/SIZE][SIZE=2][COLOR=#0000ff]Protected[/COLOR][/SIZE][SIZE=2] [/SIZE][SIZE=2][COLOR=#0000ff]Overloads[/COLOR][/SIZE][SIZE=2] [/SIZE][SIZE=2][COLOR=#0000ff]Overrides[/COLOR][/SIZE][SIZE=2] [/SIZE][SIZE=2][COLOR=#0000ff]Sub[/COLOR][/SIZE][SIZE=2] WndProc([/SIZE][SIZE=2][COLOR=#0000ff]ByRef[/COLOR][/SIZE][SIZE=2] m [/SIZE][SIZE=2][COLOR=#0000ff]As[/COLOR][/SIZE][SIZE=2] System.Windows.Forms.Message)
[/SIZE][SIZE=2][COLOR=#0000ff]If[/COLOR][/SIZE][SIZE=2] m.Msg = WM_LBUTTONDOWN [/SIZE][SIZE=2][COLOR=#0000ff]Then
[/COLOR][/SIZE][SIZE=2][/SIZE][SIZE=2][COLOR=#0000ff]Return
[/COLOR][/SIZE][SIZE=2][/SIZE][SIZE=2][COLOR=#0000ff]End[/COLOR][/SIZE][SIZE=2] [/SIZE][SIZE=2][COLOR=#0000ff]If
[/COLOR][/SIZE][SIZE=2][/SIZE][SIZE=2][COLOR=#0000ff]MyBase[/COLOR][/SIZE][SIZE=2].WndProc(m)
[/SIZE][SIZE=2][COLOR=#0000ff]End[/COLOR][/SIZE][SIZE=2] [/SIZE][SIZE=2][COLOR=#0000ff]Sub
End[/COLOR][/SIZE][SIZE=2] [/SIZE][SIZE=2][COLOR=#0000ff]Class[/COLOR][/SIZE]
[SIZE=2][COLOR=#0000ff][/COLOR][/SIZE] 
[SIZE=2][COLOR=black]

[/COLOR][/SIZE]

So, how do I override the textbox in question? Or will it automatically override all textboxes in my App (not bothered if it does)

..These are the fundamentals of programming I haven't come across yet, so bear with me as I'm again a Noob

Arg81 · Apr 20, 2006

Please could someone help me on this as it's still an issue....

I am trying to have the textbox so it's "Disabled", but still use the Vertical scrolbar (which doesn't work if set textbox1.enabled=false)

Thanks,
Luke

JuggaloBrotha · Apr 20, 2006

i just made a project with a multiline textbox and set it's readonly property to true and the scrollbars work fine, here's the code:

VB.NET:

TextBox1.Text = "1" & ControlChars.NewLine & "2" & ControlChars.NewLine & "3" & ControlChars.NewLine & "4" & ControlChars.NewLine & "5"
TextBox1.ScrollBars = ScrollBars.Vertical
TextBox1.ReadOnly = True

kulrom · Apr 20, 2006

JuggaloBrotha said:
i just made a project with a multiline textbox and set it's readonly property to true and the scrollbars work fine, here's the code:

VB.NET:

TextBox1.Text = "1" & ControlChars.NewLine & "2" & ControlChars.NewLine & "3" & ControlChars.NewLine & "4" & ControlChars.NewLine & "5" TextBox1.ScrollBars = ScrollBars.Vertical TextBox1.ReadOnly = True

yes but he doesn't want the user be able to select the text. And with the code above you can still select it. Right?
V-B_New-B> try this

VB.NET:

[SIZE=2][COLOR=#0000ff]Protected [/COLOR][/SIZE][SIZE=2][COLOR=#0000ff]Overloads [/COLOR][/SIZE][SIZE=2][COLOR=#0000ff]Overrides [/COLOR][/SIZE][SIZE=2][COLOR=#0000ff]Sub[/COLOR][/SIZE][SIZE=2] WndProc([/SIZE][SIZE=2][COLOR=#0000ff]ByRef[/COLOR][/SIZE][SIZE=2] m [/SIZE][SIZE=2][COLOR=#0000ff]As[/COLOR][/SIZE][SIZE=2] System.Windows.Forms.Message)
[/SIZE][SIZE=2][COLOR=#0000ff] If[/COLOR][/SIZE][SIZE=2] (m.Msg = &H202) [/SIZE][SIZE=2][COLOR=#0000ff]Then
[/COLOR][/SIZE][SIZE=2]   [COLOR=darkgreen] '{...}[/COLOR]
[/SIZE][SIZE=2][COLOR=#0000ff] End [/COLOR][/SIZE][SIZE=2][COLOR=#0000ff]If
[/COLOR][/SIZE][SIZE=2][COLOR=#0000ff]End [/COLOR][/SIZE][SIZE=2][COLOR=#0000ff]Sub[/COLOR][/SIZE]

or you can declare the variable WM_LBUTTONDOWN as integer and use it for Comparasion.

VB.NET:

[SIZE=2][COLOR=#0000ff]Const[SIZE=2][COLOR=#000000] WM_LBUTTONDOWN [/COLOR][/SIZE][SIZE=2][COLOR=#0000ff]As [/COLOR][/SIZE][SIZE=2][COLOR=#0000ff]Integer[/COLOR][/SIZE][SIZE=2][COLOR=#000000] = &H202[/COLOR][/SIZE][/COLOR][/SIZE]

Regards

Arg81 · Apr 21, 2006

Hey,

Yes you are correct I don't want any of the text to be selected - I want the textbox to act as though it is disabled. However I do want the vertical scrollbar to still be used.

Kulrom, please bear in mind I'm new to this overriding and overloading side of programming

I've tried your code, but what replaces '(...) ?? I tried using

VB.NET:

[LEFT][SIZE=2][COLOR=#0000ff]Protected [/COLOR][/SIZE][SIZE=2][COLOR=#0000ff]Overloads [/COLOR][/SIZE][SIZE=2][COLOR=#0000ff]Overrides [/COLOR][/SIZE][SIZE=2][COLOR=#0000ff]Sub[/COLOR][/SIZE][SIZE=2] WndProc([/SIZE][SIZE=2][COLOR=#0000ff]ByRef[/COLOR][/SIZE][SIZE=2] m [/SIZE][SIZE=2][COLOR=#0000ff]As[/COLOR][/SIZE][SIZE=2] System.Windows.Forms.Message)
[/SIZE][SIZE=2][COLOR=#0000ff] If[/COLOR][/SIZE][SIZE=2] (m.Msg = &H202) [/SIZE][SIZE=2][COLOR=#0000ff]Then
[/COLOR][/SIZE][SIZE=2]  [COLOR=#0000ff]Return
[SIZE=2]End[/SIZE][/COLOR][SIZE=2][COLOR=#0000ff]If
[/COLOR][/SIZE][SIZE=2][COLOR=#0000ff]MyBase[/COLOR][/SIZE][SIZE=2].WndProc(m)
[/SIZE][/SIZE][SIZE=2][COLOR=#0000ff]End [/COLOR][/SIZE][SIZE=2][COLOR=#0000ff]Sub[/COLOR][/SIZE]
[COLOR=#0000ff][/COLOR] 
[COLOR=#0000ff]

[/COLOR]

but that didn't work

Thanks!
Luke[/LEFT]

JuggaloBrotha · Apr 21, 2006

from the sounds of it, you should make your own control for this

i would suggest using a label on a panel with a vertical scrollbar

R_K_T_ASHOKA · Apr 23, 2006

HI Check this i have did it in VB.Net..

'Put this in a class...

VB.NET:

Public Class MyTextBox
Inherits System.Windows.Forms.TextBox
'const int WM_LBUTTONDOWN = 0x0201; 
Protected Overrides Sub WndProc(ByRef m As System.Windows.Forms.Message)
'If m.Msg = WM_LBUTTONDOWN Then Exit Sub
If m.WParam.ToString = 4917572 Then Exit Sub
MyBase.WndProc(m)
End Sub
End Class

Add a form to your application and add a Button, name it Button1

paste this code..

Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim mt As New MyTextBox
mt.Left = 0
mt.Top = 0
mt.Size = New Size(50, 100)
mt.Multiline = True
mt.Show()
Me.Controls.Add(mt)

mt.Text = "asd asdjh asdlh kjshf shdfljsah dhslkdfh ksahdf hsadl flkshdflkh sad hflksfdlkhslkdf lksdfl hdhfals dhhasdl lkjsdhflkhsdlkfhlksdhf lhsadf hdhf lsah jasdhlkhsdfh fd asd asdjh asdlh kjshf shdfljsah dhslkdfh ksahdf hsadl flkshdflkh sad hflksfdlkhslkdf lksdfl hdhfals dhhasdl lkjsdhflkhsdlkfhlksdhf lhsadf hdhf lsah jasdhlkhsdfh fd "

mt.ScrollBars = ScrollBars.Vertical
mt.BackColor = Color.Gray

End Sub

and by the way How we can convert this code to VB.Net, Anybody knows??
'const int WM_LBUTTONDOWN = 0x0201;

Bye

kulrom · Apr 23, 2006

R_K_T_ASHOKA said:
... and by the way How we can convert this code to VB.Net, Anybody knows??
'constint WM_LBUTTONDOWN = 0x0201;

Const WM_LBUTTONDOWN As Integer = &H202

Textbox ReadOnly or Disabled....

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