Visual Basic Discussion Boards

Unexpected error when you add or remove components onto forms

JUNEYT27-Dec-05 2:23

JUNEYT

27-Dec-05 2:23

Hello!

I added OleDbConnection1 and OleDbCommand1 on to my form. Everything was working properly and then I decided to define those internally instead of placing on to form and of course I removed these components. And then I decided to put them back onto form again!

I started getting the following error message and connection string returns empty eventough every definition were made exactly as they were before.

"The ConnectionString property has not been initialized."

If you help me to figure out, I would really appreciate it!

Thanks!

Bedri

SQL Database structure

Sasmi27-Dec-05 2:15

Sasmi

27-Dec-05 2:15

Hi guy's it is just an stupid question, i want to know ..
if i create a column in SQL table and give the 'Description' of that column in Columns property window thenwhere does he stored the data...
i mean in which sys table.

Sasmi

Re: SQL Database structure

Colin Angus Mackay27-Dec-05 2:28

Colin Angus Mackay

27-Dec-05 2:28

syscomments probably.

My: Blog | Photos

"Man who stand on hill with mouth open will wait long time for roast duck to drop in." -- Confucius

insert line number in VB

Paritos27-Dec-05 1:54

Paritos

27-Dec-05 1:54

hi,

How to insert line number in VB Code.

Paritosh

Re: insert line number in VB

Colin Angus Mackay27-Dec-05 2:29

Colin Angus Mackay

27-Dec-05 2:29

You'll need to explain more. What do you mean by "insert line number"? Where do you want a line number to go?

My: Blog | Photos

"Man who stand on hill with mouth open will wait long time for roast duck to drop in." -- Confucius

Re: insert line number in VB

Gulfraz Khan28-Dec-05 4:44

Gulfraz Khan

28-Dec-05 4:44

Hi if you are talking about Line Numbers for the source code in Visual Studio .NET 2003 then do the following
Click Tools -> Options then Select "Basic" in the side bar and finally check "Line numbers" under "Display"

resize combobox scrollbars

plukje27-Dec-05 1:40

plukje

27-Dec-05 1:40

Hi,

I want to resize the combobox scrollbars, so you can scroll easily on a touch screen

Thx in advance.

Regards
bart

Incription

Harshad Pednekar27-Dec-05 0:44

Harshad Pednekar

27-Dec-05 0:44

How to incript the text and create text format file

and how to modify that file

by using serialisation in .Net

Re: Incription

Robert Rohde27-Dec-05 21:29

Robert Rohde

27-Dec-05 21:29

Your question is a bit unclear and unspecific. I would suggest that you read this article[^] as a startup.

Can we use VB script For inter process communication

varmag26-Dec-05 23:54

varmag

26-Dec-05 23:54

Hai All
I am developing an app in which i want to open a ITunes App which.
Is it necessary to call vbscript Function ?
Is there any Api with VB6 to open the EXE?
Just like Sendmessage in VC++

Thanks in Advance

Varmag

How do this databind (easy questionm I guess)

MaWeRic26-Dec-05 22:19

MaWeRic

26-Dec-05 22:19

I have a Database wich contains two tables : "Notice" and "Company". Notices contains notices for companys. Relation between tables are Company.CID and Notice.CID. One company can have several Notices

Problem: How do I put all my company-names in a combo instead with DataMember(Name) and DataValue(CID) and when I save my Notice the Company.CID is saved to Notice.CID

I hope you understand ... I want to change companyname on a Notice using their real name instead of using CID ...

Please help

//Maw

background image crystal reports (urgent)

fox2126-Dec-05 21:52

fox21

26-Dec-05 21:52

Hi,
I'm creating an application in vb.net wich uses the crystal reports. But i would like to now if there is a way so set a background image to the report. And if so, how should i do it?

thx in advance

Roy

Re: background image crystal reports (urgent)

Kim Mostinckx27-Dec-05 2:29

Kim Mostinckx

27-Dec-05 2:29

Hi Roy,

I can't help you... Blush | :O

Kim

Regarding datagrid control (very urgent)

nagalakshmibasireddy26-Dec-05 21:32

nagalakshmibasireddy

26-Dec-05 21:32

hello,
please help me regarding my problem
i have to store stored procedure in one dataset,
and sqlquery in one dataset and i have to merge these two datasets and then bind to datagrid,stored procedure has one input parameter....
first help me in retriveing data from stored procedure into dataset...
please help me regarding this
Thanks & Regards
Nagalakshmi

Multi select option for combo box

tsnarayanan26-Dec-05 18:33

tsnarayanan

26-Dec-05 18:33

Currently i have a combo box with a single select and can also enter a text.
Now i need to select more than one from the combobox. Just like our listbox functionality. How to implement without changing the UI. After selecting the items from the listbox and when it is double clicked, the selected items should be shown in the combo box.

I have a way. But it looks tedious one.. I'll explain it in detail...
I have a textbox and combobox (width is reduced to show only the down arrow). So for the user it'll look like combobox only. And when the user clicks on the downarrow, we can display the listbox and allowing to select multi select.

Is this the way that it can be done.?

Re: Multi select option for combo box

Dave Kreskowiak27-Dec-05 7:36

Dave Kreskowiak

27-Dec-05 7:36

Ummm...The ComboBox doesn't support multiple selections. You'll have to use a different control that does, like maybe a CheckedListBox.

RageInTheMachine9532
"...a pungent, ghastly, stinky piece of cheese!" -- The Roaming Gnome

Create a control at runtime and move on the form

annabathula26-Dec-05 18:10

annabathula

26-Dec-05 18:10

Hi,
I have been working on a VB.net project. where I want to use drag and drop controls. Right now, I can able to create the controls on runtime with following code

Dim btn as new Button
me.controls.add(btn)
btn.location=new point(23,34)
btn.show
like..

The only problem is how to move the controls (command buttons) on the form to place it right place on the form.
i tried mouse down and mouse up methods to do it. But, the button created in one event handling sub routine is not Available in other sub routines.As i am declaring it as private sub routine.(I need a global runtime button to be created in a event method so that other event procedures also shared that button).do u understand?

Please help me in this regard.
Thank you
ramesh

.

Ramesh
M.tech

-- modified at 0:13 Tuesday 27th December, 2005

Re: Create a control at runtime and move on the form

Gerben Jongerius26-Dec-05 21:59

Gerben Jongerius

26-Dec-05 21:59

Why don't you use the 'Drag & Drop' options in .Net which you can link to the events of the control during the creation. After this you don't need to know anything about the control as it aranges the drag and drop himself.

All you'l have to do is link some private functions that deal with the drag & drop to the related events of the control and you're done.

Good example: MSDN article

Re: Create a control at runtime and move on the form

annabathula27-Dec-05 3:50

annabathula

27-Dec-05 3:50

Thank you for your reply
The solution showed in the MSDN is ok. But I need a control to be created at runtime and add mouse events to it (double click event).
In the MSDN example case, textboxes created on the form are type friend with event. so all the events are handled by with events method.

But, ,if I create the textbox at runtime ,how do I write the code for event handling?

Can you please explain me with sample code?

Please create the control at runtime and do other tings (drag&drop and move).
Thank you,

ramesh

-- modified at 9:50 Tuesday 27th December, 2005

Re: Create a control at runtime and move on the form

Gerben Jongerius27-Dec-05 7:38

Gerben Jongerius

27-Dec-05 7:38

The below example is for binding the double click event to a function, but you can use a similar method for all events.

sub CreateControls()<br />
   Dim cnt as Control = new Button();<br />
   ' Add placement logic the usual way<br />
   AddHandler cnt.DoubleClick addressof onDoubleClick<br />
End Sub<br />
<br />
private sub onDoubleClick(sender as object, e as EventArgs)<br />
   ' Execute double click code<br />
end sub<br />

For more on events see: MSDN help

Note you will have to bind the drag & drop functions if you choose to use this option.

Re: Create a control at runtime and move on the form

annabathula28-Dec-05 9:08

annabathula

28-Dec-05 9:08

Great........... Laugh | :laugh:

i got a solution for my problem
Thank you

Ramesh

Files and a Network Stream

Mazitan26-Dec-05 13:28

Mazitan

26-Dec-05 13:28

Would anyone happen to know how to transfer any file through a networkstream, sort of like

'Load image wanted to be transferred<br />
Dim TP As Image = Image.FromFile(Path)<br />
'Save to stream to be transferred<br />
TP.Save(NetworkStream, Imaging.ImageFormat.Jpeg)<br />
TP.Dispose() 'Get rid of it

Except for any file (images, etc media(avi,qt,bmp,etc), plaintext files, executables, etc).

I've been looking at the other classes in system.io but nothing I've tried has worked so far.

Re: Files and a Network Stream

Dave Kreskowiak27-Dec-05 7:33

Dave Kreskowiak

27-Dec-05 7:33

You might be looking for something like this[^].

RageInTheMachine9532
"...a pungent, ghastly, stinky piece of cheese!" -- The Roaming Gnome

Re: Files and a Network Stream

Mazitan31-Dec-05 11:47

Mazitan

31-Dec-05 11:47

Sorry for being so long to reply. No, that isn't exactly what I am looking for, although I sort of found my own answer. I was able to send images etc by using a filestream and a binaryreader with readbytes, but that doesn't seem to work with any other file type. The output is slighty different from orignal file, if you could help me figure that out.

References to programmatically created controls

Hmmkk26-Dec-05 5:25

Hmmkk

26-Dec-05 5:25

I have not many clues of what to do... I'm using VS 2003 (VB.net)
I'm trying to create controls on the fly, creating them is just fine. But if I afterwards want to change one of them, how to make that possible?
This code is just a simple example:

Private Sub Beginner()<br />
        For i As Integer = 1 To 10<br />
            Dim p As New Panel<br />
<br />
            p.Name = "pnlThing" & i<br />
            p.BackColor = System.Drawing.Color.Blue<br />
            p.Size = New System.Drawing.Size(10, 10)<br />
            p.Location = New System.Drawing.Point(10 * i, 10)<br />
<br />
            Me.Controls.Add(p)<br />
        Next i<br />
<br />
    End Sub

Is there a way to make a reference so I can use pnlThing1.*method*?

Regards,
Hmmkk

-- modified at 11:38 Monday 26th December, 2005

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