You are getting that error because you are attempting to update a control
from another thread.
The best way to handle this is with delegates. You utilize the
InvokeRequired/BeginInvoke methods to transfer the update request from the
background thread to the UI updater thread.
...Glenn
On Fri, Oct 31, 2008 at 2:19 PM, Dickery1 <[EMAIL PROTECTED]> wrote:
>
> i get a error cross thread operation not valid when it is trying to
> write to the textfield.
> void appendToTextBox(string str){
>
>
> i have a feeling that the delegates run in a different thread and when
> the events are triggered, they are trying to write to the form thread.
> i guess C# does not like it. how do i fix it.
>
> using System;
> using System.Collections.Generic;
> using System.ComponentModel;
> using System.Data;
> using System.Drawing;
> using System.Text;
> using System.Windows.Forms;
> using Krs.Ats.IBNet;
>
> using Krs.Ats.IBNet.Contracts;
>
> namespace collectTickData
> {
> public partial class Form1 : Form
> {
> private static IBClient client;
>
> public Form1()
> {
> InitializeComponent();
> }
> private void appendToTextBox(string str){
> textBox1.Text += str + "\r\n";
>
> }
>
> private void textBox1_TextChanged(object sender, EventArgs e)
> {
>
> }
>
> private void button1_Click(object sender, EventArgs e)
> {
> client = new IBClient();
> client.ThrowExceptions = true;
> client.Error += client_Error;
> client.TickPrice += client_TickPrice;
> client.TickSize += client_TickSize;
> Console.WriteLine("Connecting to IB.");
> client.Connect(textBox1.Text, Int32.Parse(textBox2.Text),
> 10);
> //Forex Test
> Forex EUR = new Forex("EUR", "USD");
> client.RequestMarketData(17, EUR, null, false);
>
> }
> void client_TickSize(object sender, TickSizeEventArgs e)
> {
> appendToTextBox("Tick Size: " + e.Size + " Tick Type: " +
> EnumDescConverter.GetEnumDescription(e.TickType));
> }
>
> void client_Error(object sender, ErrorEventArgs e)
> {
> appendToTextBox("Error: " + e.ErrorMsg);
> }
>
> void client_TickPrice(object sender, TickPriceEventArgs e)
> {
> appendToTextBox("Price: " + e.Price + " Tick Type: " +
> EnumDescConverter.GetEnumDescription(e.TickType));
> }
>
>
> }
> }
