Simple Interest Calculator in ASP.NET VB.NET

Simple Interest Calculator in ASP.NET VB.NET

Simple Interest Rate Calculator in asp.net using C#

Get User input Principal Amount, Period(in Years/Month),Interest Rate.  Total Amount =(Interest Amount for the Duration+Principal).

Add  Text fields and dropdownlist 

<form id="form1" runat="server">
        <h1> Simple Interest Calculator in ASP.NET</h1>
    <div>
        <b>Principal Amount:</b>
        <asp:TextBox ID="txtPrincipalAmt" runat="server"></asp:TextBox><br />
        <b>Period:</b>
        <asp:TextBox ID="txtPeriod" runat="server"></asp:TextBox><asp:DropDownList ID="DropDownListPeriods"
                runat="server" AutoPostBack="True" OnSelectedIndexChanged="DropDownListPeriods_SelectedIndexChanged">
            <asp:ListItem>Years</asp:ListItem>
            <asp:ListItem>Months</asp:ListItem>
        </asp:DropDownList><br />
        <b>Interest Rate(%):</b>
        <asp:TextBox ID="txtInterest" runat="server"></asp:TextBox> % per year.<br />
        <asp:Button ID="btnCalculate" runat="server" Text="Calculate" OnClick="btnCalculate_Click"  CssClass="btnStyle"/>
    </div>
        <div>
            <h3>output of simple interest calculation</h3>
            <b>Total Amount:</b><asp:TextBox ID="txtTotalAmt" runat="server"></asp:TextBox> USD<br />
            <b>Interest Amount:</b><asp:TextBox ID="txtIntAmt" runat="server"></asp:TextBox> USD<br />
        </div>
    </form>

On DropDownList selection Change

  Protected  Sub DropDownListPeriods_SelectedIndexChanged(ByVal sender As Object, ByVal e As EventArgs)
            Dim period As String =  DropDownListPeriods.SelectedValue
            If period.ToLower() = "years" Then
                Dim result As Decimal
                If Decimal.TryParse(txtPeriod.Text,out result) Then
                    txtPeriod.Text = (result / 12).ToString()
                End If

            Else
                Dim result As Decimal
                If Decimal.TryParse(txtPeriod.Text,out result) Then
                    txtPeriod.Text = (result * 12).ToString()
                End If
            End If
 End Sub

//Calculate Interest rate Button Click Event Handler

 
  Protected  Sub btnCalculate_Click(ByVal sender As Object, ByVal e As EventArgs)
            Dim pricipalAmt As Decimal
            Decimal.TryParse(txtPrincipalAmt.Text,out pricipalAmt)
            Dim intRate As Decimal
            Decimal.TryParse(txtInterest.Text,out intRate)

            Dim period As String =  DropDownListPeriods.SelectedValue
                        Dim Duration As Decimal

                        Decimal.TryParse(txtPeriod.Text,out Duration)
                        If period.ToLower() = "months" Then

                            Duration = Duration / 12
                        End If


            'txtTotalAmt
            Dim totalIntAmount As Decimal = ((pricipalAmt * intRate * Duration) / 100)
            txtIntAmt.Text = totalIntAmount.ToString()
            txtTotalAmt.Text = (totalIntAmount + pricipalAmt).ToString()
  End Sub

OUTPUT

For  1 year interest rate of 6% amount is $1  ==> after 1yr Total Amount is 1.06 $ interest earned is 0.06.

Tags:Simple Interest Calculator in ASP.NET VB.NET,Simple Interest Calculator in VB.NET,Simple Interest calculator in WPF,Button click Event Handler, DropDownList AutoPostback,DropDownList SelectionIndexChanged Event handler, Decimal.TryParse.