RE: Sockets programming and SQL, ADO .NET

#1

Hi,
You are trying to access a TEXTBOX in you RunClient method that is not
created in the current executing Thread. That is main. This is not allowed.
Either call your texbox Event asynchronously to update itself or Leave it
alone.
Mail me to know ethe exact reason at unosinu (AT) hotmail (DOT) com
--
Shrinivas Reddy.
Systems Analyst
Satyam Computer Services Ltd.

"tiger" wrote:

Quote:

Hi,

I have a client and server application running on a local host, what I am
trying to do is ...The client will send an IP address, and City to the
server and the will compare this info to the database (MS access) and then
send a response back to client if the data are in the database or not. for
some reason my client just exit right after connect and I can not figure it
out so far. My query works fine. I think I just a set of different eyes to
look at it. I know it is long, but I dont know what to do.

Here is the Database (Fake data):

IP_Address City
127.12.12.3 Dallas
127.3.2.3 Oak Cliff
127.0.0.9 Garland
124.125.12.3 Plano
132.25.6.9 Grand Praire

Here is my Client

using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
using System.Net.Sockets;
using System.Threading;
using System.IO;

namespace SimSocClient
{

/// <summary

/// Summary description for Form1.

/// </summary

public class Client : System.Windows.Forms.Form
{

private System.Windows.Forms.Label label1;
private System.Windows.Forms.TextBox textBox1;
private System.Windows.Forms.Label label2;
private System.Windows.Forms.TextBox textBox2;
private System.Windows.Forms.Button button1;
private System.Windows.Forms.TextBox textBox3;

/// <summary

/// Required designer variable.

/// </summary

private NetworkStream output;
private BinaryWriter writer;
private BinaryReader reader;
private string message = "";

//private string message1 = "";

private string user_IP = "";
private string user_city = "";
private Thread readThread;
private System.ComponentModel.Container components = null;

public Client()
{

//

// Required for Windows Form Designer support

//

InitializeComponent();
readThread = new Thread(new ThreadStart (RunClient));
readThread.Start();

//

// TODO: Add any constructor code after InitializeComponent call

//

}

/// <summary

/// Clean up any resources being used.

/// </summary

protected override void Dispose( bool disposing )
{

if( disposing )
{
if (components != null)
{
components.Dispose();
}

}

base.Dispose( disposing );

}

#region Windows Form Designer generated code

/// <summary

/// Required method for Designer support - do not modify

/// the contents of this method with the code editor.

/// </summary

private void InitializeComponent()

{

this.label1 = new System.Windows.Forms.Label();

this.textBox1 = new System.Windows.Forms.TextBox();

this.label2 = new System.Windows.Forms.Label();

this.textBox2 = new System.Windows.Forms.TextBox();

this.button1 = new System.Windows.Forms.Button();

this.textBox3 = new System.Windows.Forms.TextBox();

this.SuspendLayout();

//

// label1

//

this.label1.Font = new System.Drawing.Font("Microsoft Sans Serif", 8.25F,
System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point,
((System.Byte)(0)));

this.label1.Location = new System.Drawing.Point(8, 32);

this.label1.Name = "label1";

this.label1.TabIndex = 0;

this.label1.Text = "IP Address";

this.label1.TextAlign = System.Drawing.ContentAlignment.MiddleCenter;

//

// textBox1

//

this.textBox1.Location = new System.Drawing.Point(128, 32);

this.textBox1.Name = "textBox1";

this.textBox1.Size = new System.Drawing.Size(176, 20);

this.textBox1.TabIndex = 1;

this.textBox1.Text = "";

//

// label2

//

this.label2.Font = new System.Drawing.Font("Microsoft Sans Serif", 8.25F,
System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point,
((System.Byte)(0)));

this.label2.Location = new System.Drawing.Point(8, 88);

this.label2.Name = "label2";

this.label2.TabIndex = 2;

this.label2.Text = "City";

this.label2.TextAlign = System.Drawing.ContentAlignment.MiddleCenter;

//

// textBox2

//

this.textBox2.Location = new System.Drawing.Point(128, 88);

this.textBox2.Name = "textBox2";

this.textBox2.Size = new System.Drawing.Size(176, 20);

this.textBox2.TabIndex = 3;

this.textBox2.Text = "";

//

// button1

//

this.button1.Font = new System.Drawing.Font("Microsoft Sans Serif", 8.25F,
System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point,
((System.Byte)(0)));

this.button1.Location = new System.Drawing.Point(328, 56);

this.button1.Name = "button1";

this.button1.TabIndex = 4;

this.button1.Text = "Verify";

this.button1.Click += new System.EventHandler(this.button1_Click);

//

// textBox3

//

this.textBox3.Font = new System.Drawing.Font("Microsoft Sans Serif", 8.25F,
System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point,
((System.Byte)(0)));

this.textBox3.Location = new System.Drawing.Point(16, 136);

this.textBox3.Multiline = true;

this.textBox3.Name = "textBox3";

this.textBox3.Size = new System.Drawing.Size(384, 208);

this.textBox3.TabIndex = 5;

this.textBox3.Text = "";

//

// Client

//

this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);

this.ClientSize = new System.Drawing.Size(424, 366);

this.Controls.AddRange(new System.Windows.Forms.Control[] {

this.textBox3,

this.button1,

this.textBox2,

this.label2,

this.textBox1,

this.label1});

this.Name = "Client";

this.Text = "Simple Socket Client";

this.ResumeLayout(false);

}

#endregion

/// <summary

/// The main entry point for the application.

/// </summary

[STAThread]

static void Main()

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RE: Sockets programming and SQL, ADO .NET

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RE: Sockets programming and SQL, ADO .NET - 01-30-2006 , 09:50 AM