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POLoan Calculator in ASP.NET from a Console Application
 

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  1. POLoan Calculator in ASP.NET from a Console Application
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    <p>I just finished working on a console application in witch I created a loan calculator. My code is as follows:</p> <pre><code>using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Threading.Tasks; namespace LoanCalculator { public class LoanCalculator { public static void Main(string[] args) { // declare variables double principle = 0; double years = 0; double interest = 0; string principleInput, yearsInput, interestInput; // User input for Principle amount in dollars Console.Write("Enter the loan amount, in dollars(0000.00): "); principleInput = Console.ReadLine(); principle = double.Parse(principleInput); //Prompt the user to reenter any illegal input if (principle &lt; 0) { Console.WriteLine("The value for the mortgage cannot be a negative value"); principle = 0; } // User input for number of years Console.Write("Enter the number of years: "); yearsInput = Console.ReadLine(); years = double.Parse(yearsInput); //Prompt the user to reenter any illegal input if (years &lt; 0) { Console.WriteLine("Years cannot be a negative value"); years = 0; } // User input for interest rate Console.Write("Enter the interest rate(%): "); interestInput = Console.ReadLine(); interest = double.Parse(interestInput); //Prompt the user to reenter any illegal input if (interest &lt; 0) { Console.WriteLine("The value for the interest rate cannot be a negative value"); interest = 0; } //Calculate the monthly payment //ADD IN THE .Net function call Math.pow(x, y) to compute xy (x raised to the y power). double loanM = (interest / 1200.0); double numberMonths = years * 12; double negNumberMonths = 0 - numberMonths; double monthlyPayment = principle * loanM / (1 - System.Math.Pow((1 + loanM), negNumberMonths)); //double totalPayment = monthlyPayment; //Output the result of the monthly payment Console.WriteLine(String.Format("The amount of the monthly payment is: {0}{1:0.00}", "$", monthlyPayment)); Console.WriteLine(); Console.WriteLine("Press the Enter key to end. . ."); Console.Read(); } } } </code></pre> <p>Everything above works out as planned. I am now trying to convert this into an ASP.NET web application using Visual Studio and I am stuck. My current UI I have set up with 3 labels for principle input (with a text box), loan duration (with radio button list) , and interest rate (with dropdownList). </p> <p>My problem I am having is I am trying to get a radiobutton list in for my loan duration (15, 30, or other) as my selections. If the user selects Other, I am trying to implement a textbox for them to type in a value in years. After the user selects his intended duration I want my InterestRate to be a drop down list item with 1%-10% as options.</p> <p>I also have a button called "Calculate" where it calculates the solution from the users input. If someone could lead me into the right direction on how to approach this. I am brand new to working with ASP.NET and I am confused how to successfully transform my console application to an ASP.NET project. Thanks for the help!</p> <p>My Page looks as follows:</p> <pre><code>&lt;%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %&gt; &lt;!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"&gt; &lt;html xmlns="http://www.w3.org/1999/xhtml"&gt; &lt;head runat="server"&gt; &lt;title&gt;Monthly Mortgage Calculator&lt;/title&gt; &lt;/head&gt; &lt;body&gt; &lt;form id="form1" runat="server"&gt; &lt;div&gt; &lt;h1&gt;Monthly Payment Loan Calculator&lt;/h1&gt; &lt;/div&gt; &lt;asp:Label ID="Label1" runat="server" Text="Please enter the principle amount"&gt; &lt;/asp:Label&gt; &amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp; &lt;asp:TextBox ID="txtPrinciple" runat="server"&gt;&lt;/asp:TextBox&gt; &lt;br /&gt; &lt;br /&gt; &lt;asp:Label ID="Label2" runat="server" Text="Please enter the loan duration in years"&gt;&lt;/asp:Label&gt; &lt;br /&gt; &lt;asp:RadioButtonList ID="RadioButtonList1" runat="server" AutoPostBack="True"&gt; &lt;asp:ListItem&gt;15 Years&lt;/asp:ListItem&gt; &lt;asp:ListItem&gt;30 Years&lt;/asp:ListItem&gt; &lt;asp:ListItem&gt;Other&lt;/asp:ListItem&gt; &lt;/asp:RadioButtonList&gt; &lt;br /&gt; nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;n bsp;&amp;nbsp;&amp;nbsp;&amp;nbsp; &lt;asp:TextBox ID="txtYears" runat="server"&gt;&lt;/asp:TextBox&gt; &lt;br /&gt; &lt;br /&gt; &lt;asp:Label ID="Label3" runat="server" Text="Please select the interest rate"&gt; &lt;/asp:Label&gt; &amp;nbsp;&amp;nbsp;&amp;nbsp; &lt;asp:DropDownList ID="DropDownList1" runat="server"&gt; &lt;asp:ListItem&gt;1&lt;/asp:ListItem&gt; &lt;asp:ListItem&gt;2&lt;/asp:ListItem&gt; &lt;asp:ListItem&gt;3&lt;/asp:ListItem&gt; &lt;asp:ListItem&gt;4&lt;/asp:ListItem&gt; &lt;asp:ListItem&gt;5&lt;/asp:ListItem&gt; &lt;asp:ListItem&gt;6&lt;/asp:ListItem&gt; &lt;asp:ListItem&gt;7&lt;/asp:ListItem&gt; &lt;asp:ListItem&gt;8&lt;/asp:ListItem&gt; &lt;asp:ListItem&gt;9&lt;/asp:ListItem&gt; &lt;asp:ListItem&gt;10&lt;/asp:ListItem&gt; &lt;/asp:DropDownList&gt; &lt;br /&gt; &lt;br /&gt; &lt;asp:Button ID="Button1" runat="server" Text="Monthly Payment" /&gt; &lt;/form&gt; &lt;/body&gt; &lt;/html&gt; </code></pre>
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    1. COPost up some of your asp markup code, what does the page look like
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      1. POLoan Calculator in ASP.NET from a Console Application
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    2. CO@Mikey Mouse Code has been updated
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      1. POLoan Calculator in ASP.NET from a Console Application
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    3. COLooks good. You need to add the OnClick Method to either the Button Markup or in your code Behind with "+=" There's an example in my solution, put a break point on to see if it works
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      1. POLoan Calculator in ASP.NET from a Console Application
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