Esempio n. 1
0
        protected void ConvertButton_Click(object sender, EventArgs e)
        {
            int temp = 0;
            //dont do anything unless a valid money amount has been entered in the money text box.
            if (!money_text_box.Text.Equals("") && Int32.TryParse(money_text_box.Text, out temp))
            {
                //  to declare that mywebService is webservice that we built which contains all the calculation logic
                WebService1 mywebService = new WebService1();
                //  to invoke Curr_converter which is part of mywebService
                // and provid it with 3 required inputs (currency_from,currency_to and amount of money to be converted)
                TextBox1.Text = mywebService.Curr_converter(ddlfrom.SelectedValue, ddlto.SelectedValue, System.Convert.ToDecimal(money_text_box.Text));

                // to show the exchange rate for both currencies
                TextBox2.Text = "1 " + ddlfrom.SelectedValue + " = " + mywebService.get_rate_from_api(ddlfrom.SelectedValue, ddlto.SelectedValue) + " " + ddlto.SelectedValue;
                TextBox3.Text = "1 " + ddlto.SelectedValue + " = " + mywebService.get_rate_from_api(ddlto.SelectedValue, ddlfrom.SelectedValue) + " " + ddlfrom.SelectedValue; ;
                //make the result visible
                TextBox1.Visible = true;
                TextBox2.Visible = true;
                TextBox3.Visible = true;
                //only call the chart method if two different currencies has been entered, otherwise hide the chart
                if (ddlto.SelectedIndex != ddlfrom.SelectedIndex) addChart(ddlfrom.SelectedValue, ddlto.SelectedValue);
                else chart1.Visible = false;
            }
            else
            {
                //hide the textboxes if no valid amount has been entered
                TextBox1.Visible = false;
                TextBox2.Visible = false;
                TextBox3.Visible = false;
            }
        }
Esempio n. 2
0
        private void addChart(string from, string to)
        {
            //clear all existing chart areas and series
            chart1.Series.Clear();
            chart1.ChartAreas.Clear();
            //add new chart area and series for the new graph
            chart1.Series.Add("Series1");
            chart1.Series["Series1"].ChartType = SeriesChartType.Line;
            chart1.ChartAreas.Add("ChartArea1");

            //use web service to get the results to plot
            WebService1 mywebService = new WebService1();
            CurrencyElement[] result = mywebService.createChart(from, to);

            //add each data point and label to the series
            foreach (CurrencyElement obj in result)
            {
                DateTime date = (DateTime)obj.AxisX;
                double rate = obj.AxisY;
                chart1.Series["Series1"].Points.AddXY(date.Date, rate);
            }

            //adjust the appearance of the graph plot
            chart1.ChartAreas["ChartArea1"].AxisX.Maximum = ((DateTime)result[result.GetLength(0) - 1].AxisX).ToOADate();
            chart1.ChartAreas["ChartArea1"].AxisX.Minimum = ((DateTime)result[0].AxisX).ToOADate();
            chart1.ChartAreas["ChartArea1"].AxisX.IntervalType = DateTimeIntervalType.Months;
            chart1.ChartAreas["ChartArea1"].AxisX.Interval = 1;

            //and add a titel to it
            chart1.Titles.Add(
                new Title(from + " to " + to + " currency changes over the past year",
                    Docking.Top,
                    new Font("Times New Roman", 12, FontStyle.Bold),
                    Color.Red)
                );

            //lastly make the graph visible for the user
            chart1.Visible = true;
        }