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Hello once again!
I have been trying to get global hotkeys to work in order for my program to write out certain lines of text without having the form in focus, but I cannot figure out how to use the hook properly.
I'm trying to use this
Processing Global Mouse and Keyboard Hooks in C#[^]
For example, I want my program to send the code of a button when pressing Alt+T. How could I use the code for this?
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You should post your question in the forum at the end of the article, and explain exactly what problems you are having.
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Thanks, did not realize this.
Done and done.
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Linus Agren wrote: How could I use the code for this?
By extracting the hook portion, and adapting it to send some keys to the active window on a predefined combination.
Linus Agren wrote: but I cannot figure out how to use the hook properly.
Does the example work?
Bastard Programmer from Hell 
If you can't read my code, try converting it here[^]
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I tried using the example and adding the UserActivityHook to my project, however, I cannot use it in my form for some reason.
I get this typical error:
Error 1 The type or namespace name 'UserActivityHook' could not be found (are you missing a using directive or an assembly reference?)
I've searched for hours and cannot find what I forgot to do.
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You are missing the reference to the project. Go to the solution-explorer, rightclick on the "references" node, and click "add".
Also see MSDN[^].
Bastard Programmer from Hell
If you can't read my code, try converting it here[^]
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I have used the code from the CP article by Mamaladze you cite successfully for Global Hooking with Visual Studio 2013, compiling against FrameWork 4.5.1., and it's now running okay in Visual Studio 2015 CTP 5 compiled against FrameWork 4.6.
Note, however, that I have taken Mamaladze's source code, copied it, hacked out the 'Global bits, and the 'Mouse hook bits, and then re-compiled it. So I'm using it as an Application level Hook only, and only trapping Keyboard entries.
Reality check:
1. Your project (I'm assuming WinForms) should reference to 'MouseKeyboardActivityMonitor dll
2. The Form that instantiates the Hook should have Using statements that look like this:
using MouseKeyboardActivityMonitor;
using MouseKeyboardActivityMonitor.WinApi;
This is what working code in my "test-bed" looks like for the MainForm:
using System;
using System.Windows.Forms;
using MouseKeyboardActivityMonitor;
using MouseKeyboardActivityMonitor.WinApi;
namespace Test_Mama_HotKey
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
m_KeyboardHookManager = new KeyboardHookListener(new AppHooker());
m_KeyboardHookManager.Enabled = true;
m_KeyboardHookManager.KeyDown += HookManager_KeyDown;
}
private readonly KeyboardHookListener m_KeyboardHookManager;
private void HookManager_KeyDown(object sender, KeyEventArgs e)
{
Log(string.Format("{0} {1} {2}", ActiveForm.Text, ActiveForm.ActiveControl.Name, e.KeyData));
}
private void Log(string text)
{
textBox1.AppendText(string.Format("{0}{1}", text, Environment.NewLine));
}
}
}Edit: After exploring Toub's HotKey implementation more deeply, I have come to the decision not to use it.
I am currently experimenting with using the Hook code in this article by Toub: [^] to install an Application (not Global) wide HotKey hook in Visual Studio 2015 CTP 6 compiled against FrameWork 4.6. I've essentially taken out his code which does the "Global" bit, and taken out his mouse-hook code, since I just want the low-level keyboard hook; it compiles okay, now, but is not fully tested.
End Edit.
The best advice I can give you is to study Mamaladze's working example and figure out what is missing from your code, or what you are not instantiating, or using, in your code.
With your adapted Mamaladze hook code now: does it compile ? Are there any specific errors at run-time. What, exactly, does not work ?
«I'm asked why doesn't C# implement feature X all the time. The answer's always the same: because no one ever designed, specified, implemented, tested, documented, shipped that feature. All six of those things are necessary to make a feature happen. They all cost huge amounts of time, effort and money.» Eric Lippert, Microsoft, 2009
modified 25-Feb-15 4:52am.
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This morning one of the users showed me an error (in an application I didn't write, but did modify) where a generated (file)path resulted in yyyy-MM instead of yyyy/MM. The error was of course that the file could not be found.
We solved it (or worked around it) by changing his regional settings. So I went back to the code where the log of the erroneous path was generated and found this:
string serverpath = Utilities.Settings.Setting["drawingpath"] + "/" +
D.DateTime.ToString("yyyy/MM") + "/" +
D.Prefix +
D.DateTime.ToString("yyyyMMddHHmm") + ".jpg";
string localpath = Utilities.Settings.Setting["drawingtemppath"] + "/" +
D.DateTime.ToString("yyyy/MM") + "/" +
D.Prefix +
D.DateTime.ToString("yyyyMMddHHmm") + ".jpg";
System.IO.Directory.CreateDirectory(Utilities.Settings.Setting["drawingtemppath"] + "/" + D.DateTime.ToString("yyyy/MM"));
try{
System.IO.File.Copy(serverpath, localpath, true);
}
catch(Exception ex){
string msg = "DSGUI_BulkAnalyze().goByStats(): Error:["+ex.Message+"]";
Utilities.Logger.WriteLog(Utilities.Logger.TYPE.ERROR, Utilities.Logger.ACTION.SYSTEM, Utilities.Logger.SEVERITY.HIGH, msg);
}
}
The error is thrown by the serverpath variable, but I'm confused how it generates yyyy-MM instead of yyyy/MM and how the regional settings of the machine are involved.
Anyone any idea?
I know it is the serverpath variable because of the "C:\archdrawings_dev" part of the path.
Here's an example of one of the logs:
DSGUI_BulkAnalyze().goByStats(): Error:[Could not find a part of the path 'C:\archdrawings_dev/2011-04/usd201104270615.jpg'.]
thanks.
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Try
D.DateTime.ToString("yyyy") + "/" + D.DateTime.ToString("MM") instead of
D.DateTime.ToString("yyyy/MM") My guess is that as you are formatting the date as a string something may be getting replaced in the process(I know that's a very vague statement).
By trying what I suggest you will be ruling out that possibility.
“That which can be asserted without evidence, can be dismissed without evidence.”
― Christopher Hitchens
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When you specify the date format, "/" does not mean "insert a slash", any more than "yyyy" means "insert four 'y's" - it means "insert the current culture date separator character": MSDN[^]
If you absolutely want a specific character, escape it:
string serverpath = Utilities.Settings.Setting["drawingpath"] + "/" +
D.DateTime.ToString("yyyy\\/MM") + "/" +
D.Prefix +
D.DateTime.ToString("yyyyMMddHHmm") + ".jpg";(Remembering to escape the escape character or it'll be "swallowed" by the compiler - but you know that!)
Bad command or file name. Bad, bad command! Sit! Stay! Staaaay...
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 I would have never thought of that. The fact that "/" is often set as the separator only adds to the confusion. I will try this asap.
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Very good.
Regards,
Rob Philpott.
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It is generally not the best idea to leave your code to default to regional settings when you are expecting something specific from your results, as you are in this case. You can tell .net to use a specific culture when you do your ToString and you always get the format of that culture.
DateTime.Now.ToString("yyyy/MM", CultureInfo.CreateSpecificCulture("en-GB"));
However given you want a literal slash due to you creating a file path you're better with the escaping example provided in other post as that makes it unambiguous that you need a literal slash, ie for a path.
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Another way to eliminate problems caused by variant cultures is to use the IFormatter versions of ToString() etc. When dealing with file names, data stored in files, etc., specify CultureInfo.InvariantCulture. When displaying dates, integers, etc., specify CultureInfo.CurrentUICulture.
This gives you the best of both worlds - data interchange will work irrespective of the UI culture, and data will always be displayed in the current culture's preferred format.
If you have an important point to make, don't try to be subtle or clever. Use a pile driver. Hit the point once. Then come back and hit it again. Then hit it a third time - a tremendous whack.
--Winston Churchill
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Hi,
I have a table with 845 records, I Need to take 100 rows each time and push them to one service. This needs to repeat till records complete in datatable.
Help me on this.
With REgards,
Datta.G
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int rowsLeft = yourDataTable.Rows.Count;
int batchSize = 100;
int rowsDone = 0;
while (rowsLeft > 0)
{
IEnumerable<DataRow> rows = yourDataTable.AsEnumerable().Skip(rowsDone).Take(batchSize);
rowsDone += batchSize;
rowsLeft -= batchSize;
}
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A simple LINQ query using a combination of Take and Skip should get you the records. Take will get the records and Skip allows you to move past rows you have already taken.
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hi
i have a server and many clients, the clients send a lot of request to server
i must keep them into a repository(queue) and do them.
my issue:
i need to a solution or pattern for when one of the request get exception or be failed , move to another queue and if in second queue get exception again go to another queue(just 3 level)
now I'll know how to management it
please help me
thanks
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Sorry?
That doesn't make a lot of sense.
Perhaps if you give us an example, or run through the exact sequence of event you are having problems with in more detail?
Bad command or file name. Bad, bad command! Sit! Stay! Staaaay...
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It sounds to me like you're asking about using a MessageQueue. Windows comes with its own implementation (MSMQ) but there are others available. The syntax you use depends on which one you want to use.
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thanks for your answer
i need to a pattern for manage my queue
for example my clients send requests to server and server tell to them i do it and you can continue,
now i must create a repository(include two or three queue) for hold the requests
the severe have a windows service that call queue and process the request
i think it's clear , but what is my problem?
for example the requests connect to each server for get data ,note i have a lot of requests
now i need to a pattern or algorithm that when a request for each reason be failed (for example time out or server is shut down for two hours or ...)
move the request to second queue (because if it stay in first queue,my queue be long and response to other requests be difficult) and i must define a scheduler for second queue and again process the request if get error again move to third queue. and define a scheduler for third queue with low priority
please if it isn't clear tell me
thanks
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OK - that makes sense.
So what part of this is giving you difficulties?
Bad command or file name. Bad, bad command! Sit! Stay! Staaaay...
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thanks for your answer
implement it is my problem
i need to a pattern for identification the requests be failed
witch one is better two queue or one queue?
how to scheduler each queue ? (for example first queue must run non-stop and second queue what time must run)
when a request form fist queue move to second queue after scheduler do process again or move to first queue
please help me
thanks
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I can't help you identify "requests that fail" - I have no idea what causes a request to fail, or how you detect it (remember, I can't see your screen or access your hard drive) - but as to the number of queues, that's easy.
Use multiple queues.
Have a "standard feed" queue, and move "failed" items to the "first generation failure" queue. If they fail again, move them to a "second generation failure" queue. (Use Locking to ensure thread safety while adding to or removing from a queue)
And have background tasks that periodically check the queue and retry. If the queue is empty, then it waits a while before looking again.
I'd probably add a timestamp to the "failure" queue, so I don't retry for a reasonable time, increasing with each generation.
But that isn't a pattern!
Bad command or file name. Bad, bad command! Sit! Stay! Staaaay...
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Or, as I indicated above, just use MSMQ - you kind of get this for free with it.
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