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Hi,
Actually, I created a user controls in my VB .Net project. And later, I want them to instantiate in my main form module at once without reinstantiating them. So, I decided to use HashTable class to store these objects. But, I found out, when im accessing one of the objects in the HashTable, it is really very slow. It takes a about 5 to 10 seconds before it loads. So, this is really a problem of using HashTable class?
Thanks.
j.j.
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A key search in a HashTable is very fast. It's O(1) to be exact. However, an iterative search via ForEach would not be as fast as an Array or an ArrayList. If your HashTable has a lot of elements in it and you need to iterate through, then you should consider using a different data structure.
Also, if I were you, I'd double check to see if any exceptions are being thrown and caught in your code. A single exception can cause a 5-10 second hang when in a Try/Catch block. It's happened to me before.
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how i can create xml file and write or read from\to it
vb.net 2003
123
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The XMLDocument class is a DOM implimentation. There's also an XMLWriter ( from memory ), a stream that allows you to specify the nodes to create, and it makes sure the XML is valid.
Christian Graus - Microsoft MVP - C++
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i have problem with crystal report .
i have finished from project has .rpt ,and i deploymeneted to my project. when install my project on other pc , i can't run report . display message
(key32dll is not found)
vb.net 2003
123
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hello, i want to know how to choose more than 1 file using open file dialog! how can i choose more than one item (File such as: mp3)
Adrian De Battista: .Net Programmer, Java Programmer and Web Designer.
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You have to set the SelectMultiple property to true.
--------------------------------------------------------
Q:What does the derived class in C# tell to it's parent?
A:All your base are belong to us!
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Dim fd As OpenFileDialog = New OpenFileDialog()
fd.Filter="MP3 Files (mp3)|*.mp3"
fd.Multiselect = True
fd.ShowDialog()
fd.dispose
---------------
To select more than one file use SHIFT key pressed while you select. Each file you select will be added to the File Name Box and ultimately to fd.FileNames array.
thanks.
End Less Loop
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yes 10x alot .. but how can i put each song in a listbox! 
Adrian De Battista: .Net Programmer, Java Programmer and Web Designer.
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Dim fd As OpenFileDialog = New OpenFileDialog()
fd.Filter = "MP3 Files (mp3)|*.mp3"
fd.Multiselect = True
Dim result As DialogResult = fd.ShowDialog
If result = DialogResult.Cancel Then
Return
End If
Dim i As Integer
For i = 0 To fd.FileNames.Length - 1
lb.Items.Add(i + 1 & ". " & fd.FileNames(i)).ToString()
Next
fd.Dispose()
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"lb" or "LB" stands for listbox, so you better change your listbox's name before executing the code.
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thank you very very much man! u r my hero hehe  10x mate
Adrian De Battista: .Net Programmer, Java Programmer and Web Designer.
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You Welcome. Can you help me with my posted question about "Clipboards" ?
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i have declared Dim an integer in a form e.g form 1
mnow the number sotred in tht varaiable.. i want ot use it in form 2
how ca i do tht
plz help me thz
Arshaad
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'Declaration in form 1
Public ABC as Integer
'Use in form2
Form1.abc
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The other guy is correct. The wrinkle is that form2 needs to be able to see form1. That is, the instance of form1 in use would be a variable within form2. A better approach would be to factor out the variables that need to be visible to more than one form to a commonly used class, and make them static if appropriate.
Another approach would be to pass the variable between forms, so if form1 creates form2, make the form2 constuctor take an int, and pass it through that way.
Christian Graus - Microsoft MVP - C++
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You can declare that variable public in the module
which is accessible from any form
Knock out "T" from CAN'T
You 'CAN' if you think you 'CAN'
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I remember that in VB6 i can do this by copy/mutiple a textBox, then there is an array of them.
Can i do this in VB.Net? b'cause i want to display a array of number in several textBox. I can't type
textBox1.text = a(0).ToString()
textBox2.text = a(1).ToString()
...
...
textBoxXX.text = a(XX).ToString()
Can anyone have better idea???
Hopefully any idea...
Thanks
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For Next Loop ?
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Oh, my God! How can i understand your idea????
Pls give me more detail...
OK?
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Dim x As Integer
Dim count As Integer
count = 20
Dim ary() As Integer = {0, 1, 2, 3, 4}
For x = 0 To 4 'Count = collCtls.Count - 1
Dim tb As New TextBox()
With tb
.Name = "TextBox" & x
.Top = count
.Height = 150
.Width = 250
.Text = tb.Name & " Contains Array Item " & x & "'s value which is " & ary(x).ToString
End With
count += 40
Me.Controls.Add(tb)
Next
-----------------
One Click Operation.
You may change the properties of the Tbox accordingly.
I hope you should understand my idea now.
Can you help me with my posted question ?
thanks.
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thanks a lot!!
Sorry, i don't know much about ClipBoard.!
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Well nevermind, anyways thanks for reply.
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My component will hold a connection to third party service (which takes more time to initalize). Have set the minimum pool size as 3 and maximum as 50. Before calling the required method on the class, i check for whether the object holds a valid connection to the third party service , otherwise i am setting up the connection. On deactivate of the class i am not closing the connection. So that pool will have objects with live connections. The problem is when more than 3 objects are created in the pool, after the timeout period the COM+ keeps only the minimum objects (3) in the pool and destroys the rest.
I wanted to close connection to thrid party service when object is thrown out of pool. I tried putting code in "Sub Destroy" it did not work..
Can somebody help pls ?
Choks
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<serializable()>_
Class abc
Sub mysub()
Dim abc As DataObject
abc.SetData(System.Windows.Forms.DataFormat.WaveAudio,True,{?})
Clipboard.SetDataObject(abc)
End Sub
End Class
----------------------------
Which variable to use to place "Media File as object" in place of "?" in the above SetData Method.
1. FileStream.
2. MemoryStream.
3. Path To File.
All I want is to copy a media file to clipboard(mainly mpg,wav), so that I can paste it.
Thanks.
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-- modified at 8:24 Wednesday 29th March, 2006
Never Mind I solved it myself.
Thanks for your help.
Ta Ta Tadennn!
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