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Hi,
saeed_rezaei wrote: unfortunately this control donthave PAINT method
Paint event belongs to Control, and TextBox inherits from Control, so it does have one.
This is what MSDN tell us about it: "This event supports the .NET Framework infrastructure
and is not intended to be used directly from your code.
Occurs when the control is redrawn. This event is not relevant for this class. "
I suggest you try attaching a Paint handler to it and see if and when it gets called...
Luc Pattyn [Forum Guidelines] [My Articles]
this months tips:
- use PRE tags to preserve formatting when showing multi-line code snippets
- before you ask a question here, search CodeProject, then Google
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The textbox does have a paint event, BUT it draws itself outside the paint event, owner drawing a text box is a real pain.
Christian Graus - Microsoft MVP - C++
"also I don't think "TranslateOneToTwoBillion OneHundredAndFortySevenMillion FourHundredAndEightyThreeThousand SixHundredAndFortySeven()" is a very good choice for a function name" - SpacixOne ( offering help to someone who really needed it ) ( spaces added for the benefit of people running at < 1280x1024 )
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TextBox is repainted by Form, therefore you may use form’s paint method to do custom drawing in text box.
Following is a small code snippet which may give you some idea about use of Form’s paint event-
Private Sub Form1_Paint(ByVal sender As Object, ByVal e As System.Windows.Forms.PaintEventArgs) Handles Me.Paint
For Each cntrl As Control In Me.Controls
If TypeOf (cntrl) Is TextBox Then
cntrl.BackColor = Color.Red
End If
Next
End Sub
I hope this helps.
-Dave.
Dave Traister,
ComponentOne LLC.
www.componentone.com
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Hi to all!
I am again in this fantastic and very active group, after I resolved a previous problem about TDateTime (with guideline of Dave Kreskowiak), for another problem:
Unfortunately, Compact Framework version of OpenFileDialog (may be also normal version), do not recognize the entire file system in Windows Mobile 2003 based devices, but his "scope" is limited to the "\My Documents" folder.
Absolutely, I need to implement in the code I'm writing, the possibility to choose a file to open (read with StreamReader function),through entire file system (included SD Card).
Is there some simple solution (inside VB .Net Compact Framework environment),to do this or necessarily I'll must to turn to use of others complicated (for me) solutions like use of API, to mix C++ with VB, mix unmanaged code with managed ...etc..etc?
Thanks in advance for help and/or suggests.
Marco
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ok i got my grid all set up how do i add columns to my datgrid then put a name at the top
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Just use the following code
Me.DataGridView1.Columns.Add("myColumn", "Extra Column")
hope it helps !
AliAmjad(MCP)
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hi,
Just want ask anyone who knows how to validate input on textbox.
In such a way that it will only allow numbers to be placed in the textbox.
If letters on the keyboard are pressed, it will not show anything nor msgbox.
I made several searches but what I got is always showing msgbox and reset the textbox but still displays the letter pressed on the keyboard.
hope you can give me useful codes on this..
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You can easily do this by just using the following code in the Textbox's KeyPress event.
If Not IsNumeric(e.KeyChar) Then
e.Handled = True
Else
e.Handled = False
End If
Hope it Helps !
AliAmjad(MCP)
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that's great.. it works.. Thanks sir!
I have another question if you don't mind mr. AliAmjad..
Can I do the same thing or how can I do the same thing with the datagridview on just one column?
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Does this code also work with Input boxes?
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It will work with any form of text input, my articles focus on this, please take a look. The code above, while correct, also blocks space bar, back space and various other functions such as copy and paste.
The ANZAC's articles
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Be careful with this because it alos blocks out backspace and space bar.
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Hi all,
Can some one explain wat is mean by abstract class.I read some articles.But I could not able to understand
Dana
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Abstract Class in vb.net is a MustInherit Class means which cannot be instantiated you cannot create the object of an Abstract class, you have to inherit it in some other class provided that its not an abstract class also in order to create an object of it. They are basically only used for implementation of base classes.
Hope it helps !
AliAmjad(MCP)
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Thanks for the reply.
What about the Interface. Can you please give one simple example for Abstract ?
Dan
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danasegaranea wrote: What about the Interface.
Interfaces allow us to create definitions for component interaction. They also provide another way of implementing polymorphism.
danasegaranea wrote: simple example for Abstract ?
Public MustInherit Class MIClass
'Overridable Keyword allows you to overide this method and
'Implement your own logic
Overridable Sub mymethod()
'Additonal Code
End Sub
Overridable Function myfunc(ByVal a As String) As String
Return ""
End Function
End Class
Public Class UsingMIClass
Inherits MIClass
Public Overrides Sub mymethod()
MyBase.mymethod()
'Additional code
End Sub
Public Overrides Function myfunc(ByVal a As String) As String
Return MyBase.myfunc(a)
End Function
End Class
Hope it helps !
AliAmjad(MCP)
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Does this code also work with inputobxes
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i am using vb 2005 in a form i have a grid bounding with a bindingsource
now i am writing some search query to search the records, how i can change query string or commandtext of grid control at run time
hope u will understand and reply
faisal iqal ch
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By query strng, do you mean the SQL where the data comes from ? Are you using ASP.NET ? The query strng is how varibles are passed on the URL of a web site.
Christian Graus - Microsoft MVP - C++
"also I don't think "TranslateOneToTwoBillion OneHundredAndFortySevenMillion FourHundredAndEightyThreeThousand SixHundredAndFortySeven()" is a very good choice for a function name" - SpacixOne ( offering help to someone who really needed it ) ( spaces added for the benefit of people running at < 1280x1024 )
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no i am working on windows form
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You can use the DataAdapter to execute a particular query then fill the dataset and use that dataset as a source to fill the DataGridView.
Hope it helps !
AliAmjad(MCP)
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I need to write an application that reads a text file from the mainframe and store the information in a sql table. There's no space, comma or anything that separate the field and content of the field in the text file. I don't even have any idea where to begin. Pls help
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start with being able to get the file off the mainframe. if you can't do that then parsing out the file doesn't come in to play
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