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I want to design panels at design time; however, when I right click on the panel and click sent-to-back the panel behind this panel doesn't appear. It seems nothing happen with the sent-to-back or bring-to-front option.
Many thanks in advance for the help.
ljCharlie
I'm using VS.NET 2003 , and it's working well . :confused:
It works now. The problem I had was because I didn't change the underlying form to IsMdiContainer=true before I created the panels.
ljCharlie
It shouldn't make much difference though . ;) . good it's working now .
That's what I thought too but what I have to do is deleted the already created panels and recreate them.
By the way, since it seems you know a lot about vb.net, how do I call a class within another class? Well, here's what I'm trying to do. I am trying to organize my codes a bit since I don't want too many codes just within one form.vb, so I decided that I'm going to add another class so I can put some of my codes into that class. The problem is I don't know how to execute another class once the main class has been executed. Another question I have is, is this the best way to do? What other alternatives besides adding another class?
Many thanks for your help.
ljCharlie
I'm not sure If I know a lot about VB.NET as you said but I'll try to help .
Well , as I understand it , you want to move your code in the form to a class file . Then call your functions from the form . right ?
If so , then it's better to mark your functions asPublic Shared so that you can call it from anywhere without instantiating it . Clear ?
Let's said I have a class name Computers and in this class I have the Paint function to load my data from a database mdb file into a datagrid. How do I call this in my main form? Another question, the event function Paint will have to be declared as Public shared, correct? Because I think by default it is created as Private Sub.
Again, thanks for the help.
ljCharlie
This demo should answer your questions .It's commented also .
For the second question , the default in functions and sub is Public I guess . And you have to make it public so that you can call it within your form .
Many thanks for your help. I will take a look at the demo.
ljCharlie
Pirate, I have another question. I believed your demo was created under VB.NET 2003 that's why I wasn't able to open it. However, I was able to open the individual .vb files. Still, I have one more question. I have a datagride in, let's say frmMain, but how do I access this datagrid's properties in another class, let's say clsComputer? When I'm creating a public function to load the data from a datbase mdb file into frmMain's datagrid1, how do I do that? Here's what I have tried access in the clsComputer class:
But I received an error:Quote:
Public Class clsComputer
Private Shared mdbPath As String = Application.StartupPath & "\Computers.mdb"
Dim clsMain As frmMain
Dim CompDG As DataGrid = clsMain.dgComputer
Public Function ComputerDG()
Dim strConn As String = "Provider=Microsoft.Jet.OLEDB.4.0;" & "Data Source=" & mdbPath
Dim strSQL As String = "SELECT * FROM Computer"
Dim compDataAdapter As New OleDbDataAdapter(strSQL, strConn)
Dim compDataSet As New DataSet()
Dim ts As New DataGridTableStyle()
compDataSet.Clear()
compDataAdapter.Fill(compDataSet, "CompDevices")
CompDG.DataSource = compDataSet.Tables!CompDevices
'GET CURRENCY MANAGER
Dim cm As CurrencyManager
cm = CType(clsMain.BindingContext(compDataSet.Tables!CompDevices), CurrencyManager)
'CREATE DATAGRIDSTYLES AND MODIFY
ts = New DataGridTableStyle(cm)
ts.GridColumnStyles(0).HeaderText = "Serial#"
ts.GridColumnStyles(0).Alignment = HorizontalAlignment.Center
ts.GridColumnStyles(0).ReadOnly() = True
ts.GridColumnStyles(1).Alignment = HorizontalAlignment.Center
ts.GridColumnStyles(1).ReadOnly() = True
ts.GridColumnStyles(2).Alignment = HorizontalAlignment.Center
ts.GridColumnStyles(2).ReadOnly() = True
ts.GridColumnStyles(3).HeaderText = "Date Purchased"
ts.GridColumnStyles(3).Alignment = HorizontalAlignment.Center
ts.GridColumnStyles(3).ReadOnly() = True
ts.GridColumnStyles(3).Width() = 100
CompDG.TableStyles.Add(ts)
End Function
End Class
If I declaredQuote:
An unhandled exception of type “System.NullReferenceException’ occurred in Devices.exe
Additional information: Object reference not set to an instance of an object.
Dim clsMain As frmMain as Dim clsMain As New frmMain then I don't receive any error, the problem now is that the data does not load from the database mdb file into the datagrid in the frmMain form.
ljCharlie
If I were you I wouldn't do it the way you have done . Tell you why ? First , you are nothing making use of the function again . Second , You're not making any sense of OOP here . Here is the ideal solution :
VB Code:
Then call it like this from your form :
VB Code:
not tested though...
Perfect! It works! I should've thought of passing the form and the datagrid through the function. I was too concentratedon the class and not the function it self.
Many thanks for your help again.
ljCharlie
Glad to be helpful ...:)