Visual Basic

Re: Pass data between forms. Urgent...

19-Jul-05 14:13

Have the constructor of the second dialog take a DataRow, and pass the row in from your dataset.

Christian Graus - Microsoft MVP - C++

makeko19-Jul-05 16:29

makeko

19-Jul-05 16:29

Do you have some example how can i make that?

One more thing, i want that when the key is pressed the form2 close and the data go to the textboxs in form1 at the same time, without do anything more.

Thanks for the help.

Re: Pass data between forms. Urgent...

Christian Graus19-Jul-05 16:37

19-Jul-05 16:37

// Constructor that takes a DataRow
public MyNewClass(System.Data.DataRow dr)
{
// Read the data out of the row to populate your internal variables here.
}

// Don't let anyone use the default constructor
private MyNewClass(){};

makeko wrote:
One more thing, i want that when the key is pressed the form2 close and the data go to the textboxs in form1 at the same time, without do anything

If Form2 is modal, then just check the DialogResult ( if there is a Cancel button ) and then act on it like this:

In Form2:

OnClose
{
this.MylocalVar = this.MyLocalTextBox.Text; // Because the textbox will be destroyed
}

In Form1

Form2 dlg = new Form2();

if (dlg.ShowDialog() == DialogResult.OK)
{
this.TheTextBox.Text = dlg.MylocalVar;
}

Of course, it should be exposed as a get only property, and set as an internal variable that the property returns.

Christian Graus - Microsoft MVP - C++

TextBox Switch

Jason Baggett19-Jul-05 10:48

Jason Baggett

19-Jul-05 10:48

I need to figure out how to write code to swap the contents between 2 textboxes by way of a button. Also, I need to learn how to clear the contents of both TextBoxes by clicking the form.

I appreciate your help.

Jason

Christian Graus19-Jul-05 10:58

19-Jul-05 10:58

string s = TextBox1.Text
TextBox1.Text = TextBox2.Text
TextBox2.Text = s

TextBox1.Text = Textbox2.Text = ""

Christian Graus - Microsoft MVP - C++

Christian Graus19-Jul-05 11:17

19-Jul-05 11:17

I am pasting your reply here and responding to it. Please respond to the board. It may help someone else to read this.

I am learning VB.Net and doing it all on my own so that I can better
understand it from a financial standpoint.
Bare with me because I am learning and not a pro, not even close to an
amateur!!!! :)

I put the code into the Private Sub Form1_Load that you posted on the
board and

Dim String as Text

But something still isnt right........
Am I missing something? Sorry for being an idiot!!!

The code I gave you was meant to provide a template, sorry that I assumed that was obvious.

First of all, to add a button, just drag it onto the form in the design view. I believe double clicking it will add a method that is called when it is clicked, otherwise the properties window has a lightning type icon, that shows you possible events, you can type a name into the 'Clicked' event to define one.

Now, your two text boxes have names. You can change them in the properties box as well ( right click on the textbox and choose properties, although if the window is visible, just clicking will do ). A TextBox has a Text property, so TextBox1.Text assumes one of your text boxes is called TextBox1. I believe that in VB.NET, Dim s as string is the right code to create a temporary string variable ( not string s ), so if you substitute the names of your textboxes,

Dim s as string
s = Textbox1.Text
Textbox1.Text = Textbox2.Text
Textbox2.Text =s

should swap the strings. And if you create a button/event handler for the 'clear' operation,

Textbox1.Text = Textbox2.Text = ""

will clear the text boxes. What's happening here is that all the other values get changed to the last one. You can put it on two lines if you find that clearer:

Textbox1.Text = ""
Textbox2.Text = ""

I hope that helps....

Christian Graus - Microsoft MVP - C++

Anonymous19-Jul-05 11:21

19-Jul-05 11:21

Thanks!!! I think I have a good handle on it now from reading this post.
I'll try this tonight and let you know how it goes tomorrow. This is great information. Thanks again Christian!!! Big Grin | :-D

Jason Baggett20-Jul-05 4:07

Jason Baggett

20-Jul-05 4:07

Ok I have got it working.......

I was missing a few main points, one being the click event for the Form1.

In order to clear both textboxes, you will need to go to the form, Base Class Events, then Click and write code as follows:

Textbox1.text = " "
Textbox2.text = " "

this clears the textboxes by clicking the form itself.

Thanks again Christian Graus

Jason Baggett

insert statment

Anonymous19-Jul-05 10:22

Need suggestions on using a barcode scanner as a input device

19-Jul-05 10:22

hellow to all

i am trying to make insert statment into a access database ..
i write the folloing statment

MyOledbCommand.CommandText = "Insert Into Messages " _
& "(firstname,lastname,username,password,date) " _
& "Values (" & "'" & String2 & "', " & "'" & String3 & "', " & "'" & String4 & "', " & "'" & String5 & "')"

but i keep getting the msg Syntax error insert statment ..
the more odd thing is that i use the same statment in other form and it run's fine !
what could be the problem ..
i had tried million thing and possibilities nothing is working Frown | :(

thxx a lot

Re: insert statment

StealthMaker19-Jul-05 10:27

StealthMaker

19-Jul-05 10:27

maybe the problem isnt with your statment, but with your connection?

Re: insert statment

KaptinKrunch19-Jul-05 12:57

KaptinKrunch

19-Jul-05 12:57

You may wnat to check the values of each string, If one of them contains a single quote mark, then your insert statement will fail.

Re: insert statment

thealca19-Jul-05 22:50

thealca

19-Jul-05 22:50

"Date" is a VB reserved word, don't take it a habit of using reserved words, however u can still use it as a DB fieldm enclose it with "[]"

MyOledbCommand.CommandText = "Insert Into Messages " _
& "(firstname,lastname,username,password,[date]) " _
& "Values (" & "'" & String2 & "', " & "'" & String3 & "', " & "'" & String4 & "', " & "'" & String5 & "')"

good luck

Wink | ;)

Card32.dll mouse event

StealthMaker19-Jul-05 10:05

StealthMaker

19-Jul-05 10:05

hello everybody,

first off i wanna say thanks to everybody behind this website, its a great source of knowledge.

now im having trouble adding mouse events to the cards being drawn using the cards32.dll functions, ive looked around but cant find anything that would explain what im supposed to do.

what i need is to be able to click/drag (interact) with the cards drawn using cdtDrawExt function.

thanks in advance.

spettiford19-Jul-05 9:12

spettiford

19-Jul-05 9:12

I'm attempting to tackle a problem I have no experience with. Does anyone know a good resource where that I can use to be able to interface with a barcode scanner in order to navigate a application. (The application I'm creating has mouse or keyboard input devices, only a barcode reader. It will ONLY allow a user to scan an object and progress/navigate throughout the application by means of a barcode reader.)
Any ideas?
Confused | :confused:

shannon

Re: Need suggestions on using a barcode scanner as a input device

thealca19-Jul-05 13:54

thealca

19-Jul-05 13:54

If you are using scanner with keyboard interface, its just as simple as typing from a keyboard. Use notepad, scan a barcode, the data read will be displayed in the notepad.

Hope it helps
:->

Re: Need suggestions on using a barcode scanner as a input device

spettiford20-Jul-05 7:37

spettiford

20-Jul-05 7:37

There is no keyboard input. The user is using a industry barcode scanner to vehicle parts. The scanner is th only input device. Any ideas?

Shannon

Re: Need suggestions on using a barcode scanner as a input device

thealca20-Jul-05 13:32

thealca

20-Jul-05 13:32

How does it interface with PC? is it RS232? or does it have additional peripheral like PCI Interface cards? . . . . In that case, I think you should be contacting the "Barcode Scanner Vendor" regarding the drivers or commands you will use to communicate with the machine.

If it is via RS232, try it with "Microsoft Comm Control", but still u need to know the commands you will be sending to the machine.

Hope it helps.

Re: Need suggestions on using a barcode scanner as a input device

Anonymous21-Jul-05 3:28

Open/Close Forms: Has anybody seen this problem?

21-Jul-05 3:28

Thank you for your suggestions! They did in fact point me in the right direction.

Shannon

Brad Fackrell19-Jul-05 8:47

Brad Fackrell

19-Jul-05 8:47

I show/hide different forms by defining the forms in a module:

Public Class formLibrary

    Public Shared frmMain As Form
    Public Shared frmComponents As Form
    Public Shared frmNewProject As Form
    ....

End Class

Then I use the following to close the current form and open another:

Dim newFrmMain As New frmMain
formLibrary.frmNewProject.Hide()
newFrmMain.ShowDialog()

This is working perfect for all forms in my project except one. When I attempt to open the frmNewProject, I get this error:

An unhandled exception of type 'System.NullReferenceException' occurred in Mule! Data Management Tool.exe
Additional information: Object reference not set to an instance of an object.

..on this line of code:

formLibrary.frmNewProject.Hide()

Has anybody ever experienced a problem like this?

Thanks
Brad

Re: Open/Close Forms: Has anybody seen this problem?

Anonymous19-Jul-05 9:45

Re: Open/Close Forms: Has anybody seen this problem?

19-Jul-05 9:45

Your form declaration is this:
Public Shared frmNewProject As Form

And you recieve an unhandled exception here:
formLibrary.frmNewProject.Hide()

The reason is because .Hide is not a shared sub procedure of the Forms Class, therefore you are required to instantiate a Form object instance.

For instance:
Public frmNewProject As New Form

Anonymous19-Jul-05 9:48