I am fresh new to asp.net. I try to convert my windows form into asp.net application. On my Windows form I use threads to monitor for changes in data sources to udpate my controls.However, I got no clue how to accomplish this in asp.net form. It seems I cannot create a thread in the page to update my controls in the page.
View 1 RepliesI need to update my db every 5 minutes but don't want it to effect how my web application is working (should work behind the screens).
I currently do a web services call from a button to do the manual update of the db but want this to happen automatically.
What is the best way to do this in asp.net in php the equivalent would be a cron job.
Can I have a class that makes this call in the background?
I have a WPF Windows application with sqlite database which we distribute to our clients. The application consists of some database table which changes every month. eg. the application users a exchange rate table which is valid for one month.
What is the best approach to update the data in these table. note that the whole application is not changing but only the data in it changing, no change to structur of the database or table.
I'm going to create my own project, and i have some difficulties with technology selection. I will have client application(windows forms) and web service. Data exchange between clients will be only by using this web service. Data will be like image stream,so I don't know which technology to use. I started to look at WCF, but i don't know a lot about it.
View 3 RepliesI am looking for a way to integrate a web application with a client application that will sit on the users desktop. Our scenario looks like this user will click a link in the client server application that will launch an .ASPX and pass various parameters via a querystring. User will make form inputs on ASPX page and on that input, I need to be able to execute a .EXE on the client machine that will refresh the window in the client server application.
I have looked at some tutorials for using ActiveX for this, but they all seem out of date and the ones that I have been able run prompt the user with the Activex warning dialog, which I would like to avoid.
how to catch update panel's request start (before partial updation request is sent to server) and response receive (before update panel is updated) events.
View 1 RepliesIs is possible to initiate a partial page update whenever a client makes an update (say inserrting a record) and this will update the panel of all clients who are actually viewing the page ie eliminate the use of a timer control to refresh the panel each second because am getting many problems when using timercontrol.
View 2 RepliesWhat is the best way to update data constantly on the client using asp.net Timer + Update Panel, or I need to use Reverse AJAX for that?
View 3 RepliesWe need the a solution for our ASP.NET website. in which a user needs to activate his machine and next time if he visits the site then we need to check the machine is activated or not. if the machine is activated then we want to redirect the user on different page.
Is there any way by which we can get the client machine MAC address and store it our database?
I have found some solution in which this can be done but it works on on IE and some ActiveX setting needs to be done.We want this should work on atleast IE and FireFox.
I've a web services wich can invoke a pc on the internet when a new event has come.
How do I write the code?
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)
The Dumps data are in the Excel file. Now I want o upload the data to sql server 2005(which are in web server) from client pc (from browser). What will be the best way to do so?
I can know how to upload data from excel to sql server 2005 if both are in the same computer.
I have been using properties and have idea that using properties with private fields we can implement validations and buisness rules in them.
But I am just thinking asp.net client side validation controls provide good strength and they provide good user experience as well. They can be used for any type of validation (using regular expression) on client side and their re-use is possible on server side. When validation controls are a must and they are powerful; is making properties not just wastage of time ?
Is there still some use of properties ?
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?
View 1 RepliesI'm working on building a Web Forms app to process an online application that users enter in. This application takes one set of person info (name, address, etc..) and then can take X number of several other sets of information. I have the database design set up to handle the information (and all the keys/relationships). Where I'm having a problem is deciding the best way to handle taking the information on the web form.
Currently I'm thinking to build each set of information into its own user control and then trying to dynamically add an instance of the user control onto the page as needed to take each set of information. For instance, if one person has 3 personal references, they could have a button to keep adding reference controls until they put in all the information. So you'd start with 0 controls, click add to have 1, click to add a second, etc. I've read a lot of posts about issues regenerating the control, or problems with static variables when multiple people are using the same form and control counts being off. Am I taking the right approach to this project or is there an easier way I'm not aware of?
How does file upload work on a web farm? does the file you upload replicate on all the servers ?
View 6 RepliesI am trying to submit my form's data to database using asmx Web Service method(Through AJAX extension methods i.e., Script callback method). My form contains lot of data, though only text data.This will be a very fast process,Or should i submit form data in the traditional way ?
View 3 RepliesThis is not a programming question per se, but rather an attempt to find the adequate technology to use for my objective. My mandate is to build an ASP.NET Web Application. However, on certain pages, some client-side information needs to be fetched by interacting with hardware on the client's computer, for example a barcode reader or an RFID tag reader. My first reflex was to think "ActiveX" controls with, perhaps, some AJAX coding to fetch the required values from said control. However, I am not sure if I am up to date with the latest tech trends. The solution I'm looking for will let me design a user control that plugs into my ASP.NET Web Application, lets me interact with client-side hardware, and can be automatically downloaded from the Web Application itself (I can't predict which computers will access my Web Application). Which technology(ies) should I go for?
View 2 RepliesLets say i have a button control on a page and a label control. On clicking this button it performs series of actions say Action 1 , Action 2. Action 20 which will take say approx 1 hour to complete. What i need is, once this long processing is started, My web page should show the status of each action on label. Eg. After clicking a button, Label1 text should be "Action 1 is started" after Action1 is completed and Action 2 is started ,.... Label1 text should be "Action 1 Done...Action 2 started" I need this so that my user can see whats the current state of processing.
View 7 RepliesI have a web form for a user to update their user information. I have an ObjectDataSource configured to use the Update method in my BLL. If the user changes their email address in the web form, the BLL Update code checks to make sure the email address is not already in use. If it is in use, I want to cancel the update and notify the user.I was going to raise an ApplicationException in the BLL and catch it in the web form code-behind, then present a message to the user. But from what I read, this is bad practice: http://blogs.msdn.com/b/kcwalina/archive/2005/03/16/396787.aspx
View 9 RepliesI want to run an event periodically on the server side that is to be initiated by the server periodically in asp.net scenario. There will be no request from client.
View 5 RepliesI want to call a function on every after one hour. I wrote this function in Global.asax file on Aplication_Start event. Its work fine in Local Host but not working after publishing it on web server.here is my code:
protected void Application_Start(object sender, EventArgs e)
{
Application["UsersOnline"] = 0;
[code]....
When i create a new class on data layer,i can access that on business layer by creating object of that class.
but when i create a new "public class" on business layer i cant access that on presentation layer.
another thing is, after building business layer if copy Business.dll,Business.pdb,Data.dll and Data.pdb from business layer to presentation layer "BIN" i can access that class
when I am trying to accept '<abc' as password in password field I am getting following error.
System.Web.HttpRequestValidationException: A potentially dangerous Request.Form value was detected from the client (ctl00$content$txtPass="<abc")