Programming in VB.Net

Input Field validation (Accept only numbers)

noreply@blogger.com (Darshana) — Tue, 13 Apr 2010 05:53:00 -0700

In this exercise you will learn one of the methods of validating inputs at field level

Add a new form to project. Name it as frmTextboxvalid.
Place a Label and a TextBox. Name the textbox as txtNumbers.
Click at "View" and then at "Code" to enter the code window.
Click at the combo box on the left side and select txtNumbers.
Click at the combo box on the right side and select KeyPress event.
Then write the following code.

       Private Sub txtNumbers_KeyPress(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyPressEventArgs) Handles txtNumbers.KeyPress

   If Asc(e.KeyChar) <> 8 Then
   If Asc(e.KeyChar) < 48 Or Asc(e.KeyChar) > 57 Then
   e.Handled = True
   End If
   End If

   End Sub

Run the Application.

Sending EMAIL through VB.Net

noreply@blogger.com (Darshana) — Sun, 14 Mar 2010 07:52:00 -0700

Now you will learn how to send email using a VB.net program. This can be done in different ways.
First two code segments shows how a mail can be Configured and sent using the default mail server using VB code.
This program sends emails to a recipient address(s) that you specify. You have to give the mail server (SMTP Server) name or the IP address correctly.
If you are planned to send the mail using the button1_click() or button2_click() methods, first make a reference to the System.web.dll file (because the example uses classes in the system.web.mail namespace). project->Add reference...
Third code segment [button3_click()] starts the MS OUTLOOK and then user can use that application to send and receive emails.

Codings...

Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim email As New System.Web.Mail.MailMessage
email.To = "ABSReceiver@abc.com"
email.From = "ABcSender@abc.com"
email.Body = "Hi!!!!!! "
email.Subject = "Testing"
email.BodyFormat = Web.Mail.MailFormat.Text
System.Web.Mail.SmtpMail.SmtpServer = "1.1.1.1" 'SMTP Server IP Address
System.Web.Mail.SmtpMail.Send(email)
End Sub

Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
System.Web.Mail.SmtpMail.SmtpServer = "1.1.1.1" 'SMTP Server IP Address
System.Web.Mail.SmtpMail.Send("ABSReceiver@abc.com", "ABcSender@abc.com", "Testing", "Hi!!!!!! ")
End Sub

Private Sub Button3_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button3.Click
Dim a As Object
a = Shell("c:\Program Files\Outlook Express\msimn.exe", AppWinStyle.NormalFocus)
End Sub

Use of font dialog box and colour dialog box

noreply@blogger.com (Darshana) — Sun, 7 Mar 2010 06:29:00 -0800

Create new project and add a form.
Drag and Drop two command buttons and a Label to the form.
Then drag & drop a FontDialog and a ColorDialog to the form.
change the Name property of the buttons & Label as cmdFont, cmdColor and lblShow.
Change the Text property of the buttons & Label as Change Font, Change Color and Show

Double click on the change font button. write the following two lines.

FontDialog1.ShowDialog()
lblShow.Font = FontDialog1.Font

Double click on the change Color button. write the following two lines.

ColorDialog1.ShowDialog()
lblShow.ForeColor = ColorDialog1.Color

Run the Application by clicking at > or by pressing F5. Click on button and change fonts and colors.

Our first Project " Hello World ! "

noreply@blogger.com (Darshana) — Tue, 24 Nov 2009 07:05:00 -0800

First Create New Project........

Then drag and drop a button from tool box

Then click button and change the text property ("Button1") in Property window to Hello.....

Now double click on then command window appear

Then add following code.....

MsgBox("Hello World !")

Then come to form design and click Run Button

Finaly Click Hello button and see result....

Let's start VB.Net

noreply@blogger.com (Darshana) — Sun, 22 Nov 2009 09:06:00 -0800

How to open VB.Net

Go to Start menu -> All Progarms -> Microsoft Visual Studio 2005 and select Microsoft Visual Studio 2005 like this..............

Then you can see following window

Then click create project on left side to create new project. If you want open your existing report choose open project..........

Click create project

Then you get following Window............

Choose language as Visual Basic and Windows Application and after that give a name for project click OK.....

Then You have opened a new project

Now we have to Design and add code to our Project............

Do you Want to become a VB.Net Programmer

noreply@blogger.com (Darshana) — Tue, 15 Sep 2009 22:20:00 -0700

Hi ! All

Do you Want to become a VB Programmer