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Hello, I only recently started working in VB, so now I'm having an obvious syntax-wise question:
I want to hook the .Click event of an object (sectionItem), inheriting from Panel to a Sub in my class.
In C# this would simply be sectionItem.Click += new EventHandler(mySub) , but in VB I'm a bit confused.
Could someone point me to the right actions?
Tnx
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you can use AddHandler in VB.NET inorder to bind an event dynamically
Like,
<br />
AddHandler btnClose.Click, AddressOf btnClose_Click<br />
where btnClose is a button and btnClose_Click is the function or the event handler for that button when that button is clicked
Mubashir
Every job is a self portrait of the person who did it.
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Exactly what I needed. Thanks!
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There are two options in VB:
1. As described by Mubashir.
2. Using a "Handles" clause:
e.g.,
Public Sub btnClose_Click(...<param list="" />...) Handles btnClose.Click
Some people prefer this more traditional VB way. However, of course this method only applies to cases that you know at design time.
David Anton
www.tangiblesoftwaresolutions.com
Instant C#: VB to C# converter
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hi..
I hve design .net based C++ class library. I want to use it in vb.net proj.
My class library code compile without an error. But when i access that library in vb.net proj it gives me an error (its run time error)
error discription:
Unhandled Exception: System.BadImageFormatException: Could not load file or asse
mbly 'Appa, Version=1.0.2598.12775, Culture=neutral, PublicKeyToken=null' or one
of its dependencies. An attempt was made to load a program with an incorrect fo
rmat.
File name: 'Appa, Version=1.0.2598.12775, Culture=neutral, PublicKeyToken=null'
at Anna.MyModule.Main()
WRN: Assembly binding logging is turned OFF.
To enable assembly bind failure logging, set the registry value [HKLM\Software\M
icrosoft\Fusion!EnableLog] (DWORD) to 1.
Note: There is some performance penalty associated with assembly bind failure lo
gging.
To turn this feature off, remove the registry value [HKLM\Software\Microsoft\Fus
ion!EnableLog].
===========================================================
// Appa.h
#pragma once
using namespace System;
namespace Appa
{
public ref class MyClass
{
public:
int Add(int x, int y);
};
}
===========================================================
// This is the main DLL file.
#include "stdafx.h"
#include "Appa.h"
namespace Appa
{
int MyClass :: Add(int x, int y)
{
int k = x+y;
return k;
}
}
=================================================
//MyModule.vb
Module MyModule
Sub Main()
Dim obj As New Appa.MyClass
Console.WriteLine(obj.Add(10, 15))
End Sub
End Module
=================================================
plz help me guys
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You'd be better off asking this in the C++ forum. My C++ is pretty rusty, but this doesn't look like a COM componet you've written, or a .NET assembly. You're trying to use a C++ style class in managed code, and that just isn't going to work. It needs to be rewritten using CLI (Managed C++) in order to be used the way your doing it now. But, like I said, you're in the wrong forum for an accurate answer to this question.
Dave Kreskowiak
Microsoft MVP - Visual Basic
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hello,
How can I do a relation between a DataGrid and a ComboBox outside the DataGrid?
I need a help in syntax, using vb.net 2003 and sql server 2000
thank you
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Not a very clear question, but if you bind a bindingsource to your datagridview, you can use the alter the currently selected row by changing the .Current property of the bindingsource.
I'm guessing you want to pick a row by selecting a value form your ComboBox, so you could do something like this:
Dim dgv As New DataGridView()
Dim bs As New BindingSource()
dgv.DataSource = bs
bs.DataSource = myDataSet
Dim cb As New ComboBox()
And then on SelectedIndexChange event of the combobox, you can set the bs.Current to the selected Value.
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10x bertburtbort
but the question is that what i really need , the combobox brings its data from database.
when a selected value in the comboBox then its details displayed in the dataGrid
actually the data in datagrid is brought from an other table in the database
that is what i need
10x again
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If someone could show me how i can loop the following code until end of the text file.
This would be much appreciated.
Dim FileReader As System.IO.StreamReader
FileReader = My.Computer.FileSystem.OpenTextFileReader("C:\SBL.txt")
Dim StringReader As String
StringReader = FileReader.ReadLine
Form2.ListView1.Items.Add(StringReader)
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StringReader is a strange name for a string ?
Anyhow, you use a while loop. your string will return null ( Nothing in VB ) when the file is empty. Or you can use ReadAllText to get the strings out as a string array and use for each to iterate over that.
Christian Graus - Microsoft MVP - C++
Metal Musings - Rex and my new metal blog
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Christian Graus wrote: StringReader is a strange name for a string ?
It's name is what it does, so i think that the name is relevant.
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It's also the name of a class, I believe. It threw me for a second, that's all.
Christian Graus - Microsoft MVP - C++
Metal Musings - Rex and my new metal blog
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Christian Graus wrote: It's also the name of a class, I believe. It threw me for a second, that's all.
Hmm, will have to check into that THANKS
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WestSideRailways wrote: It's name is what it does
No, actually it's not. The string object doesn't read anything. It only contains data that was read.
If you want to write less confusing code, you should name the variable after what it contains or what it's used for, not after what some part of the code does when it uses the variable. Also, variables are generally not named with the first letter in capital, to distinguish them from classes and methods, and using data types in variable names is generally discouraged.
---
single minded; short sighted; long gone;
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WestSideRailways wrote: Then maybe it should be called StringHolder or StringContainer
It doesn't contain a string, it is a string. Well, actually it's a reference to a string, but that's implied as reference type variables always are references.
It contains a line of text. What's wrong will calling it "line"?
---
single minded; short sighted; long gone;
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Do While Not FileReader.EndOfStream
StringReader = FileReader.ReadLine
Form2.Listview1.items.add(StringReader)
Loop
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TwoFaced wrote: Do While Not FileReader.EndOfStream
StringReader = FileReader.ReadLine
Form2.Listview1.items.add(StringReader)
Loop
This works like a charm THANKS
Now for another question...
Is there any way to input horizonaly in a Listview box?
Or is this just a matter of Formatting?.
All my data is going down instead of across.
I am viewing the Listview Box with Details set as true and Columns Headers ready and waiting.
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Yes, you would first add an item (the leftmost item). The 'Add' method returns a listviewitem so you can get a reference to it by writing this:
Dim item As ListViewItem = ListView1.Items.Add(StringReader) Then to add an item to the next column you would use this:
item.SubItems.Add(SubItem) That's basically what you need to know.
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TwoFaced wrote: Then to add an item to the next column you would use this:
item.SubItems.Add(SubItem)
That's basically what you need to know.
THANKS Again
Have just been doing some more reading about Listview Boxs and have just figured out that what you have said is what i need to do.;)
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This is my Code so far.....
Do While Not FileReader.EndOfStream
StringReader = FileReader.ReadLine
Form2.ListView1.Items.Add(StringReader)
'Adding Subitems
Dim item As ListViewItem = Form2.ListView1.Items.Add(StringReader)
Dim i As Integer
For i = 0 To 5
item.SubItems.Add(StringReader)
Next
Loop
Just a little bit of fine tuning....
What is happening is that the first item on the left is in the right spot, after that what should be the first sum-item it duplicated in the left column.
Then in the 3rd row this same item is in all the sub-item columns.
And the same thing happens to all the other sum-items, which then knoks out of wack all the other data.
It is surprising how writing something out and then thinking about it , you can come up with an answer;)
AND THE ANSWER is :-
move the Stringreader line into the for next loop and get rid of the line :-
Form2.ListView1.Items.Add(StringReader) as you don't need it twice in the code.
-- modified at 5:52 Monday 12th February, 2007
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Can PDA support USB devices?? Such as fingerprint reader.
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I doubt it, since it would probably be another drain on the battery. Check the specs on the one you're looking at. The bigger problem would be are there USB devices out there that support being attached to a PDA...
Dave Kreskowiak
Microsoft MVP - Visual Basic
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I am populating a windows form from btn but i want to hide the form the button is on, and when i close the existing form i bring back original form. hope this makes sense
Regards
big al
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