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I have a table that I'm storing the actual names of classes in as a string. from the selected record I'd like to be able to instantiate a class from the string in the table. I've found examples using createobject(), but in all those cases the class had to be registered first. I have a couple of classes and would like to be able to just use the string stored in the table instead of a select statement so that when new classes are added, I don't have to change the code. does anyone know how to do this?
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BlackDice
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You need reflection to accomplish this:
System.Reflection.Assembly.GetExecutingAssembly().CreateInstance("FullyQualifiedTypeName")
Note that you need the Assembly instance in which the class which should be created resides. If this is not the executing assembly than you will have to use some of the other static functions of Assembly.
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In that case, no.
RageInTheMachine9532
"...a pungent, ghastly, stinky piece of cheese!" -- The Roaming Gnome
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hello all ....
I want to open a file in its parent application In visual basic 6...i dont want to specify the exe path of the application...based on the file extension my application should search its parent application and open the file...
In visual basic 6
Using Shell i tried... Like
Shell("d:\windows\system32\notepad.exe d:\temp.txt" )
but in this i need to give the parent application path.i dont want to do that...
in
In Vb .net we have
process.start(d:\temp.txt)
this opens in the parent application...
i want to do the same thing in Visual Basic 6....
Can any one help me out...
Thanks in advance....
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Did you try:
Shell("D:\temp.txt")
RageInTheMachine9532
"...a pungent, ghastly, stinky piece of cheese!" -- The Roaming Gnome
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i tried
shell("d:\temp.txt")
it gives invalid procedure call error msg
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I seem to remember why that didn't work now. Try:
Shell "CMD /C D:\TEMP.TXT"
RageInTheMachine9532
"...a pungent, ghastly, stinky piece of cheese!" -- The Roaming Gnome
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Hi, was wondering if anyone has ever tryed to implement a right click action on a MenuItem, ie: like the start menu does, u right click an item and it shows another Cmenu... i notice that when my appz context menu is popped up, u can press the windows button and nothing happens, ie: only one cmenu at a time, but then i realized that if the start menu is a Cmenu then it cant inherit from a system menu (which i believe MenuItem does). So anyone know of a completely rewritten menu control? or another way to go about this.
(BTW it appears that a MEnuItem doesnt send windows messages to a nativewindow, ie u cant subclass it.)
like this
<br />
Class MenuItemSubClass<br />
Inherits NativeWindow<br />
Sub WndProc(m as Message)<br />
MessageBox.Show m.msg.tostring<br />
'nevers shows a single message<br />
End Sub<br />
End Class<br />
<br />
'Usage<br />
Sub Form_Load<br />
dim mis as new MenuItemSubClass<br />
mis.assignhandle(aMenuItem.Handle)<br />
End Sub<br />
ANY IDEAS??? (also drag n drop would be cool  )
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Hi Friends,
I m using stored procedure to create dataset & bind that 2 my grid control. For that I have writeen the following logic. Kindly let me know that is this the correct way or is there any other optimised & good way of creating & binding a dataset 2 a particular control.
Dim cmdDetail As New SqlCommand("usp_Contact_Select_ContactDetail", ObjConContacts)
Dim daDetail As New SqlDataAdapter
Dim dsDetail As New DataSet
Dim drDetail As SqlDataReader
'
With cmdDetail
.CommandType = CommandType.StoredProcedure
.Parameters.Add("@EntryType", SqlDbType.TinyInt).Value = EntryType
.Parameters.Add("@FilterCriteria", SqlDbType.Text, 100).Value = IIf(IsNothing(Trim(txtFilterCriteria.Text)), "", Trim(txtFilterCriteria.Text))
End With
'
With daDetail
.SelectCommand = cmdDetail
.Fill(dsDetail)
grdContactDetails.SetDataBinding(dsDetail, "")
End With
Can we directly bind a DataReader to any control??
Friends just let me know ur thoughts / suggestions regading optimization of my above code.
Regards,
Vipul Mehta
Regards,
Vipul Mehta
Software Engineer
Chenoa Information & Software Services Pvt Ltd
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l=RemoveMenu(menu,pos,MF_DISABLED)
menu- handle to menu
pos- Position of menu
The above code is not working
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Hi
I have a Button(for example) and I want to check how many click eventhandlers have been assigened tothis Button
how can I do it?
-----
suppose that I have a Button , I want to assign an eventhandler for its click event, only if it has no eventhandler. how can I do it?
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I've got a huge headache right now (side-effect of being at work!), so I could be wrong here, but I don't think there is a way for you to do that.
RageInTheMachine9532
"...a pungent, ghastly, stinky piece of cheese!" -- The Roaming Gnome
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Hi
Tanx,
what is the usage of Me.Events?
Can't it help me?
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Nope. It's a Protected, ReadOnly property that returns an EventHandlerList object. The EventHandlerList has no enumeration capabilities since it is not a true collection.
RageInTheMachine9532
"...a pungent, ghastly, stinky piece of cheese!" -- The Roaming Gnome
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I am looking for a good website to learn Vb.net Any good suggestions?
I have prorgrammed in Java swing. How long would u think it would take a person to be a intermediate vb.net programmer
Thanks in advance
ep
Imagine a Day when the Concept of money disappears.
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I don't know of any websites that offer complete tutorials. A better bet would be to exvaluate your own skill set against what you find at a book store. And for how long that will take? Only you can answeer that question.
RageInTheMachine9532
"...a pungent, ghastly, stinky piece of cheese!" -- The Roaming Gnome
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 G'day and thanx in advance for anyone replying to my question.
Being a VB.Net newbie, I am having trouble using basic text extraction from a richtextbox.
As the user types into a richtext box I have a tool tip that pops up when the user hits '(' and closes on the ')' key hits. It appears just below and to the right of the current caret location in the richtextbox.
I would like to be able to extract the last word typed just prior to hitting the '(' key, so I know what they are trying to do and can provide appropriate tips in the tooltip.
Can anyone help me with a short example of extracting text from the current caret position - 1, to the last '$', " " , "<", ";" entered before the current caret position.
Sorry if it's a real Newb question, .NET has so many bloody classes, I'm sure there's a simple way to do it, but I don't know where to look.
Cheers, Craig.
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The current Caret position is always stored in the SelectionStart property of the RichTextBox control.
Now, the Text() property will return the text as a String object. You can then use its LastIndexOfAny(char(), startIndex, count) method, using 1 for startIndex and the value of SelectionStart for the count, to find the index of the last character, which you've already supplied in your post. This will give to the starting position and ending position of the word your looking for.
RageInTheMachine9532
"...a pungent, ghastly, stinky piece of cheese!" -- The Roaming Gnome
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G'day Dave,
Thanks heaps for a super fast response, and sorry for my tardiness in thanking you.
I'm stunned at how quick I have received help from these forums. It's guys like you, willing to read these and provide help, that make it all work.
Thanks again.
Craig.
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4 more to go! 
Then it's the WEEKEND! 
RageInTheMachine9532
"...a pungent, ghastly, stinky piece of cheese!" -- The Roaming Gnome
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Hi Craig
Your question is similar to having autoselect in a Combobox.You can extend the same idea over here using the keypress event.
Private Sub TextBox1_Keypress(ByVal sender As System.Object, ByVal e As KeyPressEventArgs) Handles TextBox1.KeyPress
If Char.IsControl(e.KeyChar) Then Return
With Me.TextBox1
Dim ToFind As String = .Text.Substring(0, .SelectionStart) & e.KeyChar
End With
End Sub
the variable toFind will have previous characters in textbox and the currently typed character.for eg:- if the textbox contains "chr" and user types "i" then the value of to find will be "Chri".
I think this should solve your problem.
Mandar Patankar
Microsoft Certified professional
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G'day Mandar,
Thanks very much for that. I haven't tried it yet, but it reads well, it's simple and seems to make sense. You're obviously skilled in VB .NET
I did pick up on a neat little trick you're using, which I havn't seen anywhere else....the 'With' and 'End With' Statement. It appears from your code that it basically saves us from typing Me.TextBox1 within the 'With'-'End With'. That in itself is a bit of gold !
With Me.TextBox1
Dim ToFind As String = .Text.Substring(0, .SelectionStart) & e.KeyChar
End With
Also, just a quick comment about how fast I received 2 very clever responses to my question. I received the first response in a matter of an hour or two and the second not long after. The 'CodeProject' has been a huge help. Cheers to the admin as well.
Craig.
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I'm writing an application(VB) that connect to a trading server, I have the following code, but I am havign some strange behaviour:
Private Sub cmdConnect_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles cmdConnect.Click
' assume this is a non Financial Advisor account. If it is the managedAccounts()
' event will be fired.
m_faAccount = False
m_dlgConnect.Show()
If m_dlgConnect.ok Then
With m_dlgConnect
Call TwsCtrl.connect(.hostIP, .port, .clientId)
End With
End If
End Sub
When this code is executed, the result that I want, namely to logon the server, I am having to run this code twice, I mean it works, but The command button that I press to execute this code requires me to have to press it twice, requiring this module to execute twice???? I cant quite figure why I get this strange behaviour??
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Since you've provided no information about the service your trying to connect to and what this .connect method does exactly, there's nothing anyone can tell you to help.
RageInTheMachine9532
"...a pungent, ghastly, stinky piece of cheese!" -- The Roaming Gnome
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