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Get the Location Color of Pixal then Create a image according to Your Requirement. If you can think then I Can.
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Might someone recommend a good Winsock library that makes client/server communication easy? Commercial OK.
Although I'm sure the ones here on CodeProject are good, my project requires something bulletproof.
Anyone familiar with a good one?
I'm looking for something that has an API similar to that of a message-oriented named-pipe, but that, of course, works across the internet.
MSMQ is a bit more robust than I had in mind. I just want to pass messages between applications running on different machines separated by the internet.
It has to make asynchronous comm easy.modified on Thursday, March 4, 2010 4:29 PM
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Richard,
It really depends on what you want to do. The company I currently work for uses TcpClient and TcpListener to communicate data between our apps. There are plenty of examples on this site for that. Search for "IPC" Inter process Communications.
If you are really looking for bullet proof, I would probably recommend MSMQ[^] (Microsoft Message Queue). If you're not a Microsoft fan, then try IBM WebSphere MQ[^] They are supposed to guarantee messages delivery and both are already proven.
I have had personal experience with MSMQ and it was simple to implement in C#.
Good luck and I hope I helped!
Hogan
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Thanks for your response. I've clarified my question with details of what I'm looking for.
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A quick search[^] shows how easy and safe it is for MSMQ over the internet.
Hogan
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Thanks again!
I was originally under the impression that MSMQ was some enterprise thing that you had to purchase separately and run on a dedicated server.
But now it looks like it's entirely contained within .NET, and will work peer-to-peer.
Is this true?
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Sorry I didn't explain that better. Unfortunately it isn't part of the .NET framework. MSMQ is its own install.[^] Once it is set up, it runs great. But as far as I know, you have to set it up on each machine manually. Good luck with your project!
Hogan
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Why not go straight to the source?[^]
It is easy to use and works well.
The System.Net.Sockets.TcpClient class in C# uses it fairly well and provides a real nice interface for both synchronous and asynchronous calls.
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hello to all
i m interested in C# coding devlopment but right now i have a problem that i want to show file names of a directory one by one in a lable when i press a button. can any anybody interested to help me in this way.............
tahnks
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System.IO.Directory.GetFiles("Some Path");
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hello,
I try to do a loop in my service and in the running of the start service he not give me to run the service beacuse i have my loop..
someone know what to do?
Thank You,Thank You!!
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You have to move your actual service code to a background thread.
In the services OnStart handler, traditionally, you're expected to start your services worker on a seperate thread. Your code then can return control back to the Service Manager that told your code to start, thereby avoiding the timeout problem you're probably seeing.
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Can anybody tell me what is wrong with my logic in the following code? I am trying to get a string array to take the names of projects entered one at a time from a text box. I have to be able to add to, delete from and sort the list alphabetically.
I can't use SQL because most of the time this program will be used offline.
When I build and run it I am getting no errors until the button click after entering the text in the box.
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Collections;
namespace Construction_Survey_Layout
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
public int PN;
private void btnNew_Click(object sender, EventArgs e)
{
ArrayList Projects = new ArrayList();
Projects[PN] = textBoxAddNew.ToString();
Projects.Add(Projects[PN]);
textBoxAddNew.Clear();
Projects.Sort();
for(int ctr = 0; ctr <= PN; ctr++)
{
listBox1.Items.Add(Projects[ctr]);
}
PN++;
}
}
}
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Darrall wrote: ArrayList Projects = new ArrayList();
Why do you do that on each click?
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Sorry...I wasn't very explicit there. This program is for a construction survey program. Somebody first using this program would enter the name of the first project he worked on. Then as he went along each time he got a project he would add a new one so in reality the click event occurs once every few weeks but the data has to remain in the program.
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Yes, but why create a new empty list each time?
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Yes I caught that...Thanks
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Darrall wrote: Projects[PN] = textBoxAddNew.ToString();
The entry at PN doesn't exist yet, since Projects has a count of 0 at that line.
Darrall wrote: Projects.Add(Projects[PN]);
This line almost never makes any sense (it can, sometimes). Even less in this case, since Projects[PN] can not exist (Projects still has a count of 0)
Just do Projects.Add(something) somewhere and forget about PN..?
And don't forget to add the rest of the things that you want in there - the way it is now you'd have just 1 item all the time (so sorting it does nothing)
Darrall wrote: ctr <= PN
Why not just ctr < Projects.Count ?
Then you could eliminate that confusing PN entirely
And please use a List<string>
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Thanks for your answer
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There are a number of things wrong here, not just that you get an error.
I assume you are new to C#?
Darrall wrote: // PN is the index. I didn't set it to 0 because I want it to retain it's value
// It is at 0 the first time run.
public int PN;
It will retain it's value anyway. Setting the inital vaule with
public int PN = 0; makes no difference at all. Each time you construct a Form1 object you will get a new PN, that starts at zero. If you want one PN that is shared by all instances of Form1, then make it static:
public static int PN = 0;
Don't declare fields as public unless you need them accessable outside the class, use private. You can easily create a public property which accesses teh field, which has the advantage that you can provide a getter only, and it becomes readonly to the outside world.
Darrall wrote: ArrayList Projects = new ArrayList();
This creates Projects as local to the btnNew_Click method - i.e. it is discarded when you exit. Since you keep the PN as part of the class, I would suggest this should be also.
Darrall wrote: // The error was directed at PN here.
Projects[PN] = textBoxAddNew.ToString();
Projects.Add(Projects[PN]);
textBoxAddNew.ToString() does not give you the data typed into the textbox - textBoxAddNew.Text does.
Projects[PN} does not exist. If it did, then these two statements would try to add the same string twice.
That is why you get the error message - you are trying to access an element that does not exist.
Don't use an ArrayList - use a List<String> instead - it restricts what you can add to the list to just strings (arrayList will take Strings, ints, doubles, anything).
Why do you bother with PN when the ArrayList and List both have a Count which is going to be exactly the same as PN anyway?
Why sort the Projects? Just set the Sorted property of your ListBox.
Why are you adding all the Projects strings to the List box each time?
Better way to do all this:
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private List<string> Projects = new List<String>();
private void btnNew_Click(object sender, EventArgs e)
{
Projects.Add(textBoxAddNew.Text);
listBox1.Items.Add(textBoxAddNew.Text);
textBoxAddNew.Text = "";
}
}
[edit]Forgot the "encode "<" .. option when pasting. Again. Damnit![/edit]You should never use standby on an elephant. It always crashes when you lift the ears. - Mark Wallace
C/C++ (I dont see a huge difference between them, and the 'benefits' of C++ are questionable, who needs inheritance when you have copy and paste) - fat_boy
modified on Thursday, March 4, 2010 11:45 AM
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Thanks very much for your help. Yes...I am new to C#. I used to program years ago but the last language I used was QB45 and I'm now trying to write my old programs in C#.
Thanks again
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hi
i have 10 items in combobox1.
how to show all the combobox1 items in form_load without click on the downarrow of combobox1.
Thanks in advance.
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Sounds like you want a ListBox then?I are Troll
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Hi
Sorry it is not a listbox, Every thing is like combobox only.
but only the difference is,
It is Combobox only, but in formload the height of combo should be
in expandedmode(all combo items will be visible to the user)
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I use ComboBox.MaxDropDownItems to choose the maximum number of visible items (max 100!);
you can set ComboBox.DroppedDown to make it show the items.
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