Re: Inet in C# ? - C# Discussion Boards

2-Oct-04 14:18

Hi,

How can I use this command in C# ?

Inet.Execute "http://200.100.100.100/econtrol.html", "POST", "P1=t"

Best Regrads

youssef

eggie52-Oct-04 16:25

eggie5

2-Oct-04 16:25

What's Inet?

/\ |_ E X E GG

youssef3-Oct-04 0:01

3-Oct-04 0:01

Inet is a component in VB6 for communicate in HTTP, FTP, HTTPS.
I receive this command in a VB6 project and me I working in c++ or c#

Can you help me for translate this command in C# or C++ ?

Best Regards

youssef

Nnamdi Onyeyiri3-Oct-04 0:00

Nnamdi Onyeyiri

3-Oct-04 0:00

Using the HttpWebRequest and HttpWebResponse classes.

website // Project : AmmoITX //profile
Another Post by NnamdiOnyeyiri

youssef3-Oct-04 0:46

3-Oct-04 0:46

Thanks a lot

youssef

Salil Khedkar4-Oct-04 20:57

Salil Khedkar

4-Oct-04 20:57

If you don't want to go the programatic way and if this inet thingie is an exe which accepts command line params:

System.Diagnostics.Process.Start(@"C:\Path\inet.exe", @"http://200.100.100.100/econtrol.html POST P1=t"); Wink | ;)

youssef5-Oct-04 12:50

Re: A timer func problem???

5-Oct-04 12:50

Why this code doesn't working ?
Is it correct ?

using system.net;

System.Net.WebRequest req = null;
System.Net.WebResponse rsp = null;

try
{

req = System.Net.WebRequest.Create("http://200.100.100.100/econtrol.html?P8=t");
req.Method = "POST";
req.Timeout = 5000;
}
catch (Exception ex2)
{
string sErr = "Cannot connect to Internet. " + ex2.Message;
}

youssef

A timer func problem???

cemlouis2-Oct-04 14:08

cemlouis

2-Oct-04 14:08

Hi,

I have the below code which runs after choosing an item from the listbox (choose the first one). Goes to the below item after 5 seconds and then goes to another after 5 sec again... So here is my question: I have a func which I named as process() I want to run this func only once when each item is selected in the listbox? So how can I do that???

Thank you,
Cem Louis

<br />
<br />
using System;<br />
using System.Drawing;<br />
using System.Collections;<br />
using System.ComponentModel;<br />
using System.Windows.Forms;<br />
using System.Data;<br />
using System.Timers;<br />
using System.Threading;<br />
<br />
namespace WindowsApplication14<br />
{<br />
	/// <br />
	/// Summary description for Form1.<br />
	/// <br />
	public class Form1 : System.Windows.Forms.Form<br />
	{<br />
		private System.Windows.Forms.ListBox listBox1;<br />
		private System.Windows.Forms.Button button1;<br />
		private System.Timers.Timer timerClock = new System.Timers.Timer();<br />
		/// <br />
		/// Required designer variable.<br />
		/// <br />
		private System.ComponentModel.Container components = null;<br />
<br />
		public Form1()<br />
		{<br />
			//<br />
			// Required for Windows Form Designer support<br />
			//<br />
			InitializeComponent();<br />
			InitializeTimer();<br />
<br />
			//<br />
			// TODO: Add any constructor code after InitializeComponent call<br />
			//<br />
		}<br />
<br />
		public void InitializeTimer()<br />
		{<br />
			this.timerClock.Elapsed += new ElapsedEventHandler(OnTimer);<br />
			this.timerClock.Interval = 5000;<br />
		}<br />
<br />
		/// <br />
		/// Clean up any resources being used.<br />
		/// <br />
		protected override void Dispose( bool disposing )<br />
		{<br />
			if( disposing )<br />
			{<br />
				if (components != null) <br />
				{<br />
					components.Dispose();<br />
				}<br />
			}<br />
			base.Dispose( disposing );<br />
		}<br />
<br />
		#region Windows Form Designer generated code<br />
		/// <br />
		/// Required method for Designer support - do not modify<br />
		/// the contents of this method with the code editor.<br />
		/// <br />
		private void InitializeComponent()<br />
		{<br />
			this.listBox1 = new System.Windows.Forms.ListBox();<br />
			this.button1 = new System.Windows.Forms.Button();<br />
			this.SuspendLayout();<br />
			// <br />
			// listBox1<br />
			// <br />
			this.listBox1.Location = new System.Drawing.Point(8, 8);<br />
			this.listBox1.Name = "listBox1";<br />
			this.listBox1.Size = new System.Drawing.Size(120, 95);<br />
			this.listBox1.TabIndex = 0;<br />
			// <br />
			// button1<br />
			// <br />
			this.button1.Location = new System.Drawing.Point(8, 112);<br />
			this.button1.Name = "button1";<br />
			this.button1.Size = new System.Drawing.Size(120, 23);<br />
			this.button1.TabIndex = 1;<br />
			this.button1.Text = "Run";<br />
			this.button1.Click += new System.EventHandler(this.button1_Click);<br />
			// <br />
			// Form1<br />
			// <br />
			this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);<br />
			this.ClientSize = new System.Drawing.Size(136, 142);<br />
			this.Controls.Add(this.button1);<br />
			this.Controls.Add(this.listBox1);<br />
			this.Name = "Form1";<br />
			this.Text = "Form1";<br />
			this.Load += new System.EventHandler(this.Form1_Load);<br />
			this.ResumeLayout(false);<br />
<br />
		}<br />
		#endregion<br />
<br />
		/// <br />
		/// The main entry point for the application.<br />
		/// <br />
		[STAThread]<br />
		static void Main() <br />
		{<br />
			Application.Run(new Form1());<br />
		}<br />
<br />
		private void Form1_Load(object sender, System.EventArgs e)<br />
		{<br />
			listBox1.Items.Add("Arthur");<br />
			listBox1.Items.Add("Alex");<br />
			listBox1.Items.Add("Amie");<br />
			listBox1.Update();<br />
		}<br />
<br />
		private void OnTimer(object source, ElapsedEventArgs e)<br />
		{<br />
			this.nextvalue(this.listBox1.SelectedIndex);<br />
		}<br />
<br />
		private void button1_Click(object sender, System.EventArgs e)<br />
		{<br />
			if(this.listBox1.SelectedItem!=null)<br />
			{<br />
				this.timerClock.Start();<br />
			}<br />
			else<br />
			{<br />
				MessageBox.Show("Select an Item");<br />
			}<br />
		}<br />
<br />
		private void nextvalue(int currentPosition)<br />
		{<br />
			if(currentPosition+1<=this.listBox1.Items.Count-1)<br />
			{<br />
				this.listBox1.SetSelected(currentPosition+1,true);<br />
			}<br />
			else<br />
			{<br />
				this.timerClock.Stop();<br />
			}<br />
		}<br />
<br />
		private void process()<br />
		{<br />
			// Does something in an 5 second interval<br />
			// Must run once<br />
		}<br />
	}<br />
}<br />

partyganger2-Oct-04 16:21

partyganger

2-Oct-04 16:21

Add a boolean class member that starts out as false. Whenever the timer event is triggered, check if it's false. If so, set it to true. In the ListBox SelectedIndexChanged event handler (or whatever the event is called that gets called whenever you select a different item from the listbox), set the boolean to false again, thus resetting it and allowing the timer event to run again.
This way, Process() can only run when a different item has been selected. And since the Process() then sets the boolean flag to true, it will only run once.

<br />
bool itemIsInTimer = false;<br />
<br />
private void listbox1_SelectedIndexChanged(object sender, System.EventArgs e)<br />
{<br />
 this.itemIsInTimer = false;<br />
}<br />
<br />
private void process()<br />
{<br />
if(!this.itemIsInTimer)<br />
{<br />
this.itemIsInTimer = true;<br />
// do process<br />
}<br />
}<br />

adding to the byte[] ?

SniperED0072-Oct-04 10:00

SniperED007

2-Oct-04 10:00

I have the following:

To read an image from the northwing db im doing the following (im using 78 as the current images in the northwind db have 78 bytes of header information):

<br />
ms.Write(img, 78, img.Length-78);<br />
			<br />
bmp = null;<br />
bmp = new Bitmap(ms);<br />

Then to write the image to the db:

<br />
FileStream fs = new FileStream(filePath, FileMode.Open, FileAccess.Read);<br />
<br />
BinaryReader br = new BinaryReader(fs);<br />
      		<br />
byte[] photo = br.ReadBytes((int)fs.Length);<br />

The problem is I need to add 78 bytes when writing a new image to the db, so that when I read the image its like the others that already exist in the db. Anybody know how to do this?

Re: adding to the byte[] ?

Nnamdi Onyeyiri2-Oct-04 23:58

Nnamdi Onyeyiri

2-Oct-04 23:58

You will just have to create a new byte array with the 78 bytes in place, then copy the bytes from the read buffer to the other array.

website // Project : AmmoITX //profile
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Color of Column Headers in a DataGrid

MarkMokris2-Oct-04 7:44

MarkMokris

2-Oct-04 7:44

I realize that I can override the PaintMethod of the DataGridTextBoxColumn class in order to change the color of cells within a DataGrid.

I'd like to change the colors of individual columns headers also. Does anyone know if that is possible?
How might I do that?

Thanks!

Mark Mokris

Re: Color of Column Headers in a DataGrid

sreejith ss nair3-Oct-04 19:50

Best way to store and access Global variables

3-Oct-04 19:50

Will you check my article on DatagridFormattings. It may help you out.

Sreejith Nair

Zapss2-Oct-04 3:02

Zapss

2-Oct-04 3:02

Hello
Basically iam vb programmer,i was declare global variable in module level.
where can i declare the global varibles in c# ,how can i access that
varible

Re: Best way to store and access Global variables

Colin Angus Mackay2-Oct-04 4:00

Colin Angus Mackay

2-Oct-04 4:00

C# does not support global variables per se, it isn't good a object oriented design to have lots of global variables floating around. However, you can create static variables on a class which are accessible globally. For example:

public class GlobalConfiguration
{
    private static int _sqlServerTimeout = 60;

    public static int SqlServerTimeout
    {
        get
        {
            return _sqlServerTimeout;
        }
        set
        {
            _sqlServerTimeout = value;
        }
    }
}

Of course, you don't NEED to wrap the variable in a property, but it is good practice to do so. You can add extra validation in the setter, and the getter can internally operate a lazy lookup if the variable is not often required, but getting the value takes time (Once you have generated the value the first time you can store it, so that the next time you need the value it can be returned quickly).

Do you want to know more?

Vogon Building and Loan advise that your planet is at risk if you do not keep up repayments on any mortgage secured upon it. Please remember that the force of gravity can go up as well as down.

Re: Best way to store and access Global variables

Andres Coder3-Oct-04 6:14

Andres Coder

3-Oct-04 6:14

First check out the tutorials at http://www.csharp-station.com/

I don't fully understand you question but it seems to me that you are trying to declare a public variable in a namespace ? Like that ?

namespace Something
{
public int myvariable = 0;
}

That's not possible. All members in C# must be inside objects (classes, structs). So what you must do is:

namespace Something
{
public class MyClass
{
public static int myvariable = 0;
}
}

The static modifier ensures you can access the variable without creating a new instance of the class.

P.S. You should however avoid using this tehnique as global variables are rarely needed and they're rally not usefull usually.

Design Optimization

sreejith ss nair2-Oct-04 2:56

2-Oct-04 2:56

hi,

This question is regards to code optimization.I have near to 100-150 labels and same number of textboxes in a my main form.And this form also contain few other controls. Say panel, combo box etc.
The data fetching is also dynamic based on users requirement. I check the maximum time with possible chances for data request(range).Performance is good. So i am not worried about data fetching.

My problems is with this much controls and their dynamic sub instances.I found my application becoming too very slow when this much control are drawn in the main form(I mean when form is loaded on the first time).I already told that, the above mentioned number of control is only an example. Some time it may decrease or increase. If i go for some optimization here in my design part then it won't serve users purpose. Clearly i am into trouble. What i can optimise is my code not design.

Is there any way to hadle this situation.

Sreejith Nair

Do you want to know more?

Colin Angus Mackay2-Oct-04 4:11

Colin Angus Mackay

2-Oct-04 4:11

sreejith ss nair wrote:
I have near to 100-150 labels and same number of textboxes in a my main form.And this form also contain few other controls. Say panel, combo box etc.

That sounds like a very cluttered form. It sounds to me like you should be thinking of redesigning that so that there are less controls, by moving some to subordinate forms of some kind.

sreejith ss nair wrote:
If i go for some optimization here in my design part then it won't serve users purpose. Clearly i am into trouble. What i can optimise is my code not design.

You should think very carefully about your user interface, because, even if you do improve the speed, your form, with that many controls, is likely to overwhelm your users.

Vogon Building and Loan advise that your planet is at risk if you do not keep up repayments on any mortgage secured upon it. Please remember that the force of gravity can go up as well as down.

sreejith ss nair2-Oct-04 18:43

2-Oct-04 18:43

All these controls are very urgent for me. Say these controls are small in size and they are used to show different date of year. So user want to see all date values at a time. So i can't go for control customization

Sreejith Nair

Nnamdi Onyeyiri2-Oct-04 12:14

Nnamdi Onyeyiri

2-Oct-04 12:14

If its just labels and text boxes, maybe you could use a grid control to display the information.

website // Project : AmmoITX //profile
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sreejith ss nair2-Oct-04 18:43

2-Oct-04 18:43

hatim_ali3-Oct-04 19:33

hatim_ali

3-Oct-04 19:33

1. Even if the controls are important you can create a wizard sort of User Interface by logically breaking up controls on several screens.

2. You can either create controls at runtime at some instance and then creating adding controls to your form dynamically. This will speed up your form initialization because you are not creating all 100-150 controls at form load.

hope it helps....

best regards,
Hatim Ali.

sreejith ss nair3-Oct-04 19:48

3-Oct-04 19:48

hi,
Defanitly it won't help me. My interface, that is the interface that i am going to show is the final out for the user. I can't make any sort of updation or customiztion in my controls list or my interface. This is the way it is working.

I have a small doubt to ask you.

Suppose if you want to show few date values for two months. What you will do ?. Here you need to know one more thing that, you need to show all date value at a time.

anyhow thanks for sharing my this problem

Sreejith Nair