IT3101 -Rapid Application Development Second Year- First Semester. Practical 01. Visual Basic.NET Environment.

Transcription

1 IT3101 -Rapid Application Development Second Year- First Semester Practical 01 Visual Basic.NET Environment. Main Area Menu bar Tool bar Run button Solution Explorer Toolbox Properties Window

2 Q1) Creating User Interface - HelloWorld Application: Category Control Property Value frmhello text First Windows Application Form frmhello FormBorderStyle FixedSingle MaximizeBox False Start position CenterScreen lblmessage Label lblmessage Text Hello world!!! Font Desired font, size, style ForeColor Desired color

3 Q2) 1. Create an interface with followings, Four Labels (Student ID,, Address, Age) Four Textboxes Correspond to above Labels Three buttons (Exit, Clear, OK) 2. these controls according the.net convention. 3. Change the background color of the textboxes (StudentID Orange, -Yellow, Address- Blue, Age Green). 4. Change the font size of textboxes to Change the background color of the interface into Light Blue. 6. Add an image box to the interface, and then import a picture. 7. Set the tab indexes for all textboxes and buttons with correct order. 8. Make inactive Clear and OK buttons when the program is running. Q3) Create a new form with the following design 1. When press the Change Color button backcolor of the textboxes should be changed into orange. 2. Right and Left button will align the text. 3. Clear button will clear all textboxes. 4. Exit button will close the interface.

4 Q4) Create a Graphical User Interface: Category Control Property Value lblfirst lblfirst Text First lblgender Label lblgender Text Gender lblinterestedin lblinterestedin Text Interested In lblcity lblcity Text City txtfirst Text Box txtfirst Text TextAlign Center BackColor Desired color radmale radmale Text Male RadioButton Checked True radfemale radfemale Text Female Checked lstinterestedin ListBox lstinterestedin Items Desired Items SelectionMode MultiSingle cbocity ComboBox cbocity Items Desired Items DropdownStyle Dropdown btnok Button btnok Text OK btncancel btncancel Text Cancel Display the user selections as an output in msg box

5 Q5) Windows Applications: Handling Events Category Control Property Value File Welcome.vb frmwelcome Form frmwelcome Text Welcome FormBorderStyle FixedSingle MaximizeBox False StartPosition CenterScreen lbl Label lbl Text AutoSize True txt TextBox txt Text txtdisplay txtdisplay Text ReadOnly True btnwelcome btnwelcome Text Welcome btnclear Button btnclear Text Clear Enable False btnexit btnexit Text E&xit

6 Public Class frmwelcome Inherits System.Windows.Forms.Form Private Sub btnexit_click(byval sender As Object, _ ByVal e As System.EventArgs) Handles btnexit.click End Private Sub btnclear_click(byval sender As Object, _ ByVal e As System.EventArgs) Handles btnclear.click txt.text = "" txtdisplay.text = "" txt.enabled = True btnwelcome.enabled = True btnclear.enabled = False Private Sub btnwelcome_click(byval sender As Object, _ ByVal e As System.EventArgs) Handles btnwelcome.click txtdisplay.text = "Hello, " & txt.text & _ ", Welcome To World Of.Net" txt.enabled = False btnwelcome.enabled = False btnclear.enabled = True End Class

7 Q6) Windows Applications: Handling Events Category Control Property Value File Logging.vb frmlogging Form frmlogging Text Logging FormBorderStyle FixedSingle MaximizeBox False StartPosition CenterScreen lbl Label lbl Text Enter User AutoSize True lbl Label lblpassword Text Enter Password AutoSize True Label lblmessage lblmessage txt txt Text TextBox txtpassword txtpassword Text btnsubmit btnsubmit Text Submit btnclear Button btnclear Text Clear btnexit btnexit Text E&xit Public Class Form1 Inherits System.Windows.Forms.Form Private Sub btnsubmit _Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click Dim Login As String, Password As String Login = txt.text ATI-Kurunegala 2012

8 Password = txtpassword.text If Login = "Dotnet" And Password = "aaa" Then lblmessage.text = "Welcome To Dot Net Worrld" Else lblmessage.text = "Incorrect User & Password" txt.text= "" txtpassword.text = "" txt.focus() End If Or Using Message Box If Login = "Dotnet" Then If Password = "aaa" Then MessageBox.Show("Welcome To Dot Net Worrld") Else MessageBox.Show("Incorrect Password") txtpassword.text = "" txtpassword.focus() End If Else MessageBox.Show("Incorrect Username") txt.text = "" txt.focus() End If Private Sub btnexit _Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button3.Click End Private Sub btnclear _Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click txt.text= "" txtpassword.text = "" txt.focus() End Class