Use Standard ASP.NET Web Server Controls

Lab 2 requires that you use standard ASP.NET controls to construct an interactive interest calculator.

Please write this program in C# ASP.Net

Step 1

• Start Visual Studio and create a new ASP.NET project --> Web --> Web Site
• Create ASP.NET Empty Web Site
• Solution name: yourFirstName_yourLastName
• Name:Lab2
• Add a new Web Form item

Develop a user-interface prototype as in the image

Default Values - Set the following values in your ASP.NET code

1. Default loan amount is the empty string
2. Default interest rate is 7%
3. Default time period is 20 years. Provide time periods of 10, 15, and 20 years in the drop-down box

Typically an acceptance checklist will be prepared in advance to guide the user through a series of tests.

User Interface Acceptance Testing

Default values are correct (empty loan amount, 7%, 20 years)

Loan Amount accepts all user input

Interest Rate accepts mutually exclusive selections of 5%, 6%, or 7%

Number of years allows selection of 10, 15, or 20 years

Labels associated with corresponding control

Step 2

Write Button Click Event Handler Methods

Write an event handler for the Calculate Interest button to calculate the simple interest accrued based on the following formula:

 calculatedInterest = loanAmount * interestRate * numberOfYears; 

Display the calculated interest in an asp:Label underneath the fieldset and formatted as follows:

Test case 1: Loan amount is 100 at 7% interest for 20 years.

 Total interest for a loan of $100.00 at 7% interest for 20 years is $140.00 

Test case 2: Loan amount is 12.11 at 5% interest for 10 years.

 Total interest for a loan of $12.11 at 5% interest for 10 years is $6.06 

Tips

The Convert class methods can be used convert legal strings to numeric values. For example:

double loanAmount = Convert.ToDouble(LoanAmountTextBox.Text);

The String.Format method using format strings is the easiest way to produce the output. See String Formatting in C# for an explanation of the formatting specifiers.

String output = String.Format("Total interest for a loan of {0:C} at {1:0%} interest for {2} years is {3:c}", loanAmount, interestRate, numberOfYears, interest);

Implement the event handler for the Reset button to set all controls back to their default values and clear the calculated interest output (if any).