C# - Getting A PrintScreen Of Client PC Over Web Application?
Nov 9, 2010
I want to get "PrintScreen" of Client PC when he access a particular Web Page.
I tried GOOGLEing this IDEA! but was unable to get much,
Infact what i got know on stackoverflow itself is Javascript PrintScreen
JavaScript cannot be used for such functionality.
So, I would like to know can it be done in Ajax,ASP.NET with C#/VB or in PHP because at the end i want to save this image/s continously to database either SQL Server or MySQL or Oracle.
Is this feasible by ActiveX Objects?
To my knowledge, it will be difficult to go ahead with javascript.Yet i plan to use more of client resourses than server resources while executing this functionality.
I have written a program that interprets bar charts on the web and converts them into textual summaries. It is blind and visually impaired get more information during their web surfing. Anyways, right now all of the processing is handled on the user's machine and it is a very resource intensive program. So, I wanted to make it so the main computation was done by a server so that the user could simply click on a graph and get the summary instead of waiting while the computation was being done. Does anyone have a clue how to tackle this problem? If you need more information let me know.
In this asp.net web application, users can upload files to the server through a web interface. All the uploaded files are save in a server side folder. If I want to create a new win form desktop client (actually, its a WPF application) which can be used to upload files to that same server side folder as web interface does, how can I share that server side folder with that win form client?
I'm trying to use the COM interop assembly to export some data to an Excel workbook for an ASP.NET web application. This works fine in development, since the server and the client are the same machine. However, when deployed, this is not the case. The deployed version does not throw an exception, but it also does not open Excel on the local machine (since ASP.NET is executed server-side, this is pretty obvious).
How do I go about creating an Excel application on the client's machine?
I have a server application that runs in a hosted environment but creates print jobs in the client's local network (behind NAT; the mechanics of this is not relevant).
In order to send the print job to the printer that is attached to the workstation, I need to identify the workstation. The users move around between workstations, so I can't permanently associate a user with a workstation/printer. The trivial solution is to require the user to identify the machine he is logging in from, for instance by selecting from a list, but that's an inconvenience and subject to user error.
Options I have eliminated:
Host header variables (nothing identifiable is sent) Cookies, in support of a user selection. This somewhat addresses the potential for user error, but not really. HTML5 DOM Storage - is not supported by the client's browser
Edit: I do have the option of puttnig this particular function (create a print job) into a thick client app. The app can then of course be configured and the problem goes away. But the user experience will suffer from having to switch between the browser and a Windows app.
Can some one inform me whether I need to replicate the same set of entities in the client which are similar to that of the ones in the server? I have planned to start a proj with service functions as wcf services and in turn they are getting referred in silverlight client application.
Incase if i need to consider casting to or back from the return value lists of service methods in the server, should i be creating entity class in the client application as well? Or is there a work around? Something like exposing the entities from the server just as the services functions?
I am planning to convert desktop application which has to deal with lots of client resources like printer, Id scanner(driver license,passport & business card etc.), webcam etc.Now accessing client resources like files, scanners and webcam everything has to be done through client side scripting which is really pain. Due to nature of this product, I have to create image on client PC and extract information from it. (This is also pain in Vista and Windows 7 due to security permissions and all that stuff).
My ideal design would be making managed dll which takes care of dealing with images, printers, webcam (I have to apply pan, tilt and zoom), id-scanners. This is kind of component. And GUI would be web based Asp.net which simply calls the functions of managed dll. If the end-user is opening application on new computer, then it will ask just like flash or silverlight that you have to install component locally for the first time.Points which I worry: 1. If it logically correct or sounds stupid? 2. How to install managed dll at end-user's PC (C:/program files) and use it from asp.net code behind page.
My application is intranet application.so avoid stupid assumptions about privacy and ohhooo you want to access files from my PC and all those stuff. (end-user would never mind in giving credit card to restaurnt waiter who could do anything with it behind counter but allowing web application to access file which is created by application is privacy issue)
I am working on WCF Data service which imported stored procedure, as below.
[WebGet] public List<GetMTSearchResultTest_Result> GettMTSearchResultTest() { MediaMarketResearch_PRODEntities ent = new MediaMarketResearch_PRODEntities(); return ent.GetMTSearchResultTest().ToList(); }
when i consuming this in my client application it says error as "The closed type MMRClient.MMRServiceReference.GetMTSearchResultTest_Result does not have a corresponding element settable property." I am getting this error while bind to the grid view as below.
DataServiceContext context = new DataServiceContext(new [URL])); IEnumerable<GetMTSearchResultTest_Result> empResult = context.Execute<GetMTSearchResultTest_Result>(new Uri [URL];
I'm wondering what the best practice is in reporting back to the browser about application or model state errors that would be displayed to the user. Can you throw an exception and handle it in the error handler of the jquery post? For example, consider this method:
[HandlerErrorWithAjaxFilter, HttpPost] public ActionResult RetrievePassword(string email) { User user = _userRepository.GetByEmail(email); if (user == null) throw new ClientException("The email you entered does not exist in our system. Please enter the email address you used to sign up."); string randomString = SecurityHelper.GenerateRandomString(); user.Password = SecurityHelper.GetMD5Bytes(randomString); _userRepository.Save(); EmailHelper.SendPasswordByEmail(randomString); if (Request.IsAjaxRequest()) return Json(new JsonAuth { Success = true, Message = "Your password was reset successfully. We've emailed you your new password.", ReturnUrl = "/Home/" }); else return View(); }
Is it correct to throw an exception in this case when the user is null? Or should I instead do this and handle it in the success handler of the jquery post: return Json(new JsonAuth { Success = false, Message = "The email you entered does not exist in our system. Please enter the email address you used to sign up.", ReturnUrl = "/Home/" });
I have a web application which is supposed to create a file on clients local mcahine as the user is not having permissions to create a file on the server on which the web application is running.Can anyone please help me with this.I came across some posts stating that it is not a security measure to create a file on clients machine, but in my case I am left with no options.
My web application goes onto several client servers and I wrote a simple VB6 app that when run downloads relevant files and copies them into the directory.If I wanted the web application to perform this update can I assume this is impossible, i.e. FTP the files and copy them accordingly?Also I am now pre-compiling my site each time using the aspnet_compiler and this seems to update every page, do I need to copy each page every time or simply the ones I've changed.
Is it possible to read data from serial port of client system using asp.net web site. Here is my scenario
I will be having computers connected in LAN and a web application which resides on server. Each client computer will be connected to a external machine using serial port and is ready for reading data, external machine measures equipment details and sends through serial port.Now I need to read the same data using my web page, is it possible?
Like when we do video chatting our web page reads data from web cam and sends the stream to web page. this way how can I read data from client machine to web page.
I want to create a WCF Service to transfer data to our clients application(WPF). The Data I am trying to send is as follows.
ID Code Description unit Rate 1 104200000 LIVE GOAT NOS 25 2 104200000 LIVE GOAT2 NOS 25 3 104200030 LIVE GOAT3 KGS 10 4 104202030 Water LTR 5
and so on till ~ 11000 records.
What I have done so far is. Created a service which return a list of data.
public List<Classes.TariffData> GetTariffData() { var currentTariffData = new List<Classes.TariffData>(); using (var myConnection = new SqlConnection(ConfigurationManager.ConnectionStrings["ConnectionString"].ConnectionString)) { const string query = "select a.ID,a.Code,a.Description,a.unit,a.rate,a.rate3 from tariff.dbo.tariffdata a, tariff.dbo.code_history b where a.id = b.id and b.endofvalidity is null"; using (var myCommand = new SqlCommand(query, myConnection)) { using (var ad = new SqlDataAdapter(myCommand)) { var dt = new DataTable("tariff"); ad.Fill(dt); currentTariffData.AddRange(from DataRow row in dt.Rows select new Classes.TariffData { Id = int.Parse(row["Id"].ToString()), Code = row["Code"].ToString(), Description = row["Description"].ToString(), Unit = row["unit"].ToString(), Rate = row["rate"].ToString(), Rate3 = row["rate3"].ToString() }); return currentTariffData; } } } } Class is as follows public class TariffData { public int Id { get; set; } public string Code { get; set; } public string Description { get; set; } public string Unit { get; set; } public string Rate { get; set; } public string Rate3 { get; set; } }
If i Limit the number of data by using const string query = "select top 300 a.ID,a.Code,a.Description. The Service works fine. But if I remove the top 300 part I get an error. What is your advice if I want a service to allow our client applications to update their data by using WCF. (11000 records.) I am using visual Studio 2010. C# .Net 4.0
How to create and open a docx in client side's Word from asp.net application? and if i want the user to customize the document at their localend, then how can i do this?
I am working on an application where it stores information that different clients will be using. I need to figure out how to show the current client logged in only what they have posted to the application and not everything that has been posted to the application. Client 1 logs in and sees what they have posted; client 2 loggs in and sees what they have posted.....etc. Can anyone shed some light on this for me?
