how to create Phone call Database management system | sradha webcreations

Phone call Database management system in asp.net  Sql Server

using System;

using System.Collections.Generic;

using System.Linq;

using System.Web;

using System.Web.UI;

using System.Web.UI.WebControls;

using System.Configuration;

using System.Data;

using System.Data.SqlClient;

using System.Web.Security;

public partial class IF_ELSE_AND_OR_PhoneCallCalculation : System.Web.UI.Page

{

    protected void Page_Load(object sender, EventArgs e)

    {

    }

    protected void TextBox3_TextChanged(object sender, EventArgs e)

    {

        string sCustomerName = TextBoxCUSTOMERNAME.Text;

        string sPhoneNumber = TextBoxPHONENUMBER.Text;

        int iTotalCall =Convert.ToInt32( TextBoxTOTALCALL.Text);

       

        int iExtraCall;

        iExtraCall = iTotalCall - 200;

        int iExtraCall400;

        iExtraCall400=iTotalCall-400;

        int iExtraCall600;

        iExtraCall600=iTotalCall-600;

        double dCallCharge;

      

        if (iTotalCall <= 200)

        {

            dCallCharge = 200;

        }

        else if (iTotalCall > 200 && iTotalCall <= 400)

        {

            dCallCharge=200+(iExtraCall*1.50);

        }

        else if (iTotalCall > 400 && iTotalCall <= 600)

        {

            dCallCharge = 200 + (200 * 1.50) + (iExtraCall400 * 2.50);

        }

        else

        {

            dCallCharge=200+(200*1.50)+(200*2.50)+(iExtraCall600*3.50);

        }

        TextBoxCALLCHARGE.Text = Convert.ToString(dCallCharge);

    }

    }

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