need to download files from client rather than server using asp.net - asp.net

Question

I am downloading data from yahoo stocks using the Web.DownloadString(); the site will have multiply users so I need to have the client send the download request rather than the server to avoid getting blocked from sending too many request from the servers Ip address. I can't find a way to run it on the client side and am looking for assistance making it run from client rather than server.
below is a poorly formatted function that I plan to clean up that I am using right now
I plan only do use the part required to get the data run client side and the rest run server I have just yet to clean up my code.
Public void DownloadData()
{
string csvData = null;
string month1 = Convert.ToString(DropDownList1.SelectedIndex);
string month2 = Convert.ToString(DropDownList2.SelectedIndex);
string Temp = "http://ichart.finance.yahoo.com/table.csv?s=" + SymbolName.Text + "&d=" + month2 + "&e=" + TextBox3.Text + "&f=" + TextBox4.Text + "&g=d&a=" + month1 + "&b=" + TextBox1.Text + "&c=" + TextBox2.Text + "&ignore=.csv";
string FileRead;
List<string> Remove1 = new List<string>();
string path = System.AppDomain.CurrentDomain.BaseDirectory;
using (WebClient web = new WebClient())
{
try
{
csvData = web.DownloadString(Temp);
}
catch
{
}
}
if (csvData != null && csvData != "")
{
File.WriteAllText(path + "\\MyTest.txt", csvData);
}
System.IO.StreamReader file = new System.IO.StreamReader(path + "\\MyTest.txt");
while ((FileRead = file.ReadLine()) != null) //reads from file
{
Remove1.Add(FileRead);
}
file.Close();
csvData = csvData.Replace("Date,Open,High,Low,Close,Volume,Adj Close", "");
List<stock> prices = YahooFinance.Parse(csvData);
double Lowest = 0;
foreach (stock price in prices) // finds lowest value to addjust priceing
{
if (Lowest == 0)
{
Lowest = Convert.ToDouble(price.low);
}
if (Lowest > Convert.ToDouble(price.low))
{
Lowest = Convert.ToDouble(price.low);
}
}
// new double[] { Convert.ToDouble(price.low), Convert.ToDouble(price.high), Convert.ToDouble(price.Open), Convert.ToDouble(price.close) }
Chart1.ChartAreas[0].AxisX.Interval = 2;
Chart2.ChartAreas[0].AxisX.Interval = 2;
Chart1.ChartAreas[0].AxisX.Maximum = prices.Count + 20;
Chart1.ChartAreas[0].AxisY.Minimum = Lowest - 3;
foreach (stock price in prices)
{
Chart1.Series[0].Points.AddXY(price.date, Convert.ToDouble(price.low), Convert.ToDouble(price.high), Convert.ToDouble(price.Open), Convert.ToDouble(price.close));
Chart2.Series[0].Points.AddXY(price.date, Convert.ToDouble(price.Volume));
}
}
`