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Hi all,
I am using Selenium ver 2.53.0, Firefox 46.0.1. I want to create an application that use Selenium WebDriver to do parallel tasks. I have created an app like that but: My app opened 2 webdrivers and its task was the same, not different task as I have assigned to each thread before. I wonder what was going on? Was there one-one connection between thread 1 - Webdriver 1 AND thread 2 - Webdriver 2 OR not? If not I suggest each thread was pushing its data to active Webdriver at that time. Was I right?
Hope to get any help from all of you, so I can solve my issue. Thank you!
Best Regards,
Sokhanh
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You don't provide the correct information to diagnose your problem.
But I will say that WebDriver is not thread-safe. You can't have multiple threads using the same WebDriver instance.
You CAN, however, have each thread create it's own instance of WebDriver, but each one of those is going to create it's own instance of the browser. This is going to greatly increase the amount of memory your app is using.
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So sorry if my question was not clear enough or did not have right information to diagnose my problem. But what I was trying to say is I want to create, for example, 2 threads and WebDriver instance of each one. Then, pass parameter (different task for each thread) to each thread. However, the two threads did not do its tasks, I did the same task of thread 2. I don't know what was wrong? I can describe the app I created as follow:
Main thread create 2 child threads: thread 1, thread 2
thread 1 -> create Webdriver 1 --> do task 1
thread 2 -> create Webdriver 2 --> do task 2
The problem is thread 1 and thread 2 --> do the same task 2
for (int n = 0; n < 2; n++)
{
Thread myNewThread = new Thread(() => createNewThread(taskN));
myNewThread.Name = "[Thread " + n + "]";
myNewThread.Start();
Console.WriteLine("Thread {0} started\n\n", n);
}
public static void createNewThread(task)
{
FirefoxProfile prof = new FirefoxProfile();
prof.SetPreference("browser.startup.homepage_override.mstone", "ignore");
prof.SetPreference("startup.homepage_welcome_url", "about:blank");
prof.SetPreference("startup.homepage_welcome_url.additional", "about:blank");
prof.SetPreference("browser.startup.homepage", "about:blank");
IWebDriver driver = new FirefoxDriver(prof);
doTask(driver, task);
Console.WriteLine("Thread {0} completed!\n\n", Thread.CurrentThread.Name);
}
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I installed Visual Studio 2017 a few days ago and for now I have 3 problems.
1.- After starting and stopping the project several times, when compiling appears the "Access Denied" indicating that do not have permissions in bin\Debug to copy the .exe file from obj\debug to bin\debug. The only thing that works is to go back to restart the pc. The .exe file not is in memory and unlocker does not indicate anything.
2.- I deleted the Debug directory but when compiling or recompiling the bin\Debug directory is not regenerated and error CS0246 appears because it does not find the references to the Dlls that i use in the project. Simply bin\debug remains empty.
SOLVED. Last minute: Solved. In the .csproj file there were several lines
modified 26-Mar-17 6:34am.
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Why not report it to Microsoft?
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This has nothing to do with C#, and is really an issue for Microsoft.
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Hi I am a beginner programmer and I want to developers and application where I register members and add members to a specific group example sport group,study group or prayer group etc
Please can you assist or tell me what tutorial I could read to learn this.
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Member 12997782 wrote: what tutorial I could read to learn this
The first thing you need to do is decide what language you plan to write in. Since this is the C# forum, I assume you are going to use C#. And since you want to store information you probably want to use a database. So Start with C# and when you feel comfortable using that go and learn about databases (SQL in particular). .NET Book Zero by Charles Petzold[^] is a great starter on C#, and then you can go and look at some of the articles here on CodeProject. For database there is a good tutorial at Lesson 01: Introduction to ADO.NET – C# Station[^], and again lots of further articles on CodeProject.
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Need to know step by step in construction of this Download manager using c# MyDownloader: A Multi-thread C# Segmented Download Manager[^]
i want to learn all the concepts required for it anyone who knows or have worked with the same project ?
please guide me to what to do i want to understand this project and modify it to make it more powerful
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Read the article. Download the code and read it. Identify those areas that you think you can improve on and start from there.
This space for rent
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Member 13063143 wrote: please guide me to what to do
With all due respect, you're not going to get very far as a software engineer if you expect people to stop what they're doing and spoonfeed you. This is a field where you learn by taking the trouble to read, write and debug code. It starts with YOU. If you have specific questions, feel free to ask and we'll do our best to answer them. But please don't for a moment think that this is a field where you can sit back and have someone explain software engineering to you.
/ravi
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No offense taken Mr. Ravi but i am asking for tutorial or steps on how to construct the app, the thing is am too new for both the language as well as V.S. need just the direction and for problems if any errors occurs i do it by myself and do not ask others unless i have at least tried it a few more times than my satisfaction level. there isnt any documentation on making or working of it as far as i have seen if you found any please share it w/ me
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It's an article. The article should explain how it works. If there are bits in there you are unclear about, post a question on the forum at the end of the article. If you are new to .NET, pick a simpler project to start.
This space for rent
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Hello can someone help to create an addins to read and edit a yaml file on visual studio 2015
Thanks a lot
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Sorry, you might want to try rentacoder. We don't work that way here.
This space for rent
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Hey all,
Got some strange behavior going on. I have a simple web page that has to import some fairly complex javascript from a 3rd party I am integrating our product with. I am using the WebBrowser control and working out of VS 2015.
Here is the weird part. I am adding a form, with a browser control in it, to a COM object such that this thing can be used from C++. When I try to run my test harness app from within the IDE, I get a bunch of javascript errors from the control, and the page doesn't load correctly.
I have tried suppressing the script errors. No go. I have tried the hack where you set the IE emulation mode. No go.
BUT... when I run the very same executable from the command line, it runs and loads the page just fine. I checked the browser ActiveX version of IE being used, and it appears to be the most current version of IE that is on my Windows 10 system ( v11 I think ).
So what is going on here? I am thinking it is some kind of content blocking that IE is doing only when I run in debug mode, but not from the command line. I really need to get this working, because their script sends some Json back to me via the ObjectForScripting property on the web control, and that doesn't appear to be working, thus I need to be able to debug from within the environment.
Ideas?
I'm your humble student.
TIA,
Grego
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Try disabling the Visual Studio Hosting Process: How to: Disable the Hosting Process[^]
When it's turned on, the registry hack probably won't apply, since the process name doesn't match.
Alternatively, try using CefSharp[^], which is an embedded version of Chrome, and doesn't suffer from any of the IE-legacy that comes with the WebBrowser control.
"These people looked deep within my soul and assigned me a number based on the order in which I joined."
- Homer
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Richard, thanks for the link to CefSharp!
/ravi
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Hi guys, I am very new to programming and I took up an online course on C# to learn on my own free time.
Apologies if I posted in the wrong forum.
I was just introduced to Math Operators and I have this question:
int x = 10;
int y = x++;
Console.WriteLine(x);
Console.WrtieLine(y);
I start without debugging and get this result:
11
10
I understand why y = 10 as (x++) is the value of x before increment. However, why is x = 11?
If I wanted x = 11, shouldn't it be:
int x = 10;
x = ++x;
I am confused because in the first example I only typed "int x = 10;" so shouldn't the value of x be 10 instead of 11?
I am using Visual Studio too.
Appreciate the help!
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x++ is incrementing x and so x becomes 11.
The line
int y = x++; is the same as
int y = x;
x = x + 1;
x++ is just a short form of x = x + 1 with the special treatment of the postfix operation.
Compare with the prefix increment
int y = ++x; which corresponds to
x = x + 1;
int y = x;
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The increment and decrement operators are unary types and increment or decrement their associated variable, so you can just write:
int x = 10;
++x;
int x = 10;
x++;
For a detailed description of all the operators, see Operators (C# Programming Guide)[^]
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No, in that position, the ++ is a Postfix operator. In other words, it acts to increment x after the operation (in this case, assigning x to y). Effectively, this is the same as this:
int y = x; x += 1 If we break this down into the corresponding IL, we can see what's going on. First, the version I just showed broken down:
.entrypoint
.maxstack 2
.locals init (
[0] int32 x,
[1] int32 y)
L_0000: nop
L_0001: ldc.i4.s 10
L_0003: stloc.0
L_0004: ldloc.0
L_0005: stloc.1
L_0006: ldloc.0
L_0007: ldc.i4.1
L_0008: add
L_0009: stloc.0
L_000a: ret
Then, the version of int y = x++;
.entrypoint
.maxstack 3
.locals init (
[0] int32 x,
[1] int32 y)
L_0000: nop
L_0001: ldc.i4.s 10
L_0003: stloc.0
L_0004: ldloc.0
L_0005: dup
L_0006: ldc.i4.1
L_0007: add
L_0008: stloc.0
L_0009: stloc.1
L_000a: ret
As you can see, the two methods produce almost identical IL.
This space for rent
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x is 11 because you're writing to the console AFTER x was incremented. You would see x = 10 if you had coded as follows:
int x = 10;
Console.WriteLine(x);
int y = x++;
Console.WriteLine(x);
etc.
"(I) am amazed to see myself here rather than there ... now rather than then".
― Blaise Pascal
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As you can tell from the responses the line:
int y = x++;
is pretty confusing. I would try to avoid such prefix/postfix with assignements except for constructs like for loops or while loops.
for(int x = 0; x < somelength; x++){
}
int x = 0;
while(x < somelength){
x++;
}
hope this helps.
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