Simple Interest Calculator in ASP.NET C#

Simple Interest Calculator in ASP.NET C#

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 void DropDownListPeriods_SelectedIndexChanged(object sender, EventArgs e)
        {
            String period = DropDownListPeriods.SelectedValue;
            if (period.ToLower() == "years")
            {
                Decimal result;
                if (Decimal.TryParse(txtPeriod.Text, out result))
                {
                    txtPeriod.Text = (result / 12).ToString();
                }
               
            }
            else
            {
                Decimal result;
                if(Decimal.TryParse(txtPeriod.Text, out result))
                {
                    txtPeriod.Text = (result * 12).ToString() ;
                }
            }
        }

//Calculate Interest rate Button Click Event Handler

    protected void btnCalculate_Click(object sender, EventArgs e)
        {
            Decimal pricipalAmt;
            Decimal.TryParse(txtPrincipalAmt.Text, out pricipalAmt);
            Decimal intRate;
            Decimal.TryParse(txtInterest.Text, out intRate);

            String period = DropDownListPeriods.SelectedValue;
                        Decimal Duration;

                        Decimal.TryParse(txtPeriod.Text, out Duration);
                        if (period.ToLower() == "months")
                        {
                           
                            Duration = Duration / 12;
                        }
                      

            //txtTotalAmt
            Decimal totalIntAmount = ((pricipalAmt * intRate * Duration) / 100);
            txtIntAmt.Text = totalIntAmount.ToString();
            txtTotalAmt.Text = (totalIntAmount + pricipalAmt).ToString();
        }

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 C#,Simple Interest Calculator in C#,Simple Interest calculator in WPF,Button click Event Handler, DropDownList AutoPostback,DropDownList SelectionIndexChanged Event handler, Decimal.TryParse.