I have a very long running process that I start in a thread. This raises events with messages to say what it is doing.
How can I update a label on screen with these messages? (The label is in an update panel if that makes it easier).
Im creating a messaging system which is a bit like the inbox feature of this forum. So far I have built the page with a datalist (as this is the advice i was given). I just want to know how I should create the tables within the database so that the thread of messages is seen by the right people when they login and view messages. Which is basically the 2 people messaging each other. The system is gonna have user sign in functionality as well.
View 12 RepliesIm creating a messaging system abit like the inbox feature of facebook and even this website (its gonna be created as a asp.net website). Now the messages ive been told should go to a database and then from there be displayed on a page. Im gonna be creating this system because its a project for university. Its not going to be published online or anything, just a simple demo in front of suoervisor n examiner. Im gonna simply create a database within the application to hold all the data.Now i need to have user login feature capability so the right messages are displayed to the right users. I wants the messages to be as a "thread". Any idea how this can be done in asp.net? im using visual studio 2008 .net framework 3.5.
View 1 RepliesI'm creating a very simple chat application. It has an ASP.NET web page as front-end and a WCF service as back-end for storing the messages to a database.Everything works great except one thing; when Browser A enters a chat message I want Browser B to see the message as soon as possible (yeah, I know, that's the purpose of a chat).What I've done so far is to setup a trigger within the UpdatePanel, like this:
<Triggers>
<asp:AsyncPostBackTrigger ControlID="chatTimer" EventName="Tick" />
</Triggers>
which uses a timer:
<asp:Timer ID="chatTimer" runat="server" OnTick="chatTimer_Tick" Interval="1000" />
Is this the best approach or is there a better, yet simple, way to accomplish updating of messages. One drawback with this solution is that the textbox used to enter chat messages loses focus every time the Tick event runs.
i am using light box in one of my asp.net website On a linkbutton click, an application form opens in a lightbox.this form contains a dropdownlist.till now it was working fine.but now i have to change some coding.Whenever a value is selected from that dropdownlist,its selectedindexchanged is fired.At this moment my form with light box gets disapper.what i want is,it should remain on screen as it is when any of the server side event is fired.
View 2 RepliesI want to remove checked items from checklistbox (winform control) in class file method which i am calling asynchronously using deletegate. but it showing me this error message:-
Cross-thread operation not valid: Control 'checkedListBox1' accessed from a thread other than the thread it was created on.
i have tried invoke required but again got the same error. Sample code is below:
[code]....
Time for my daily ASP.NET question.
One of my pages shows all of our customer information from a customer table. I want the user to choose whether to see all customer records, or select a specific record from a list. So, my webpage has two radio buttons (show all customers, show specific customer), a listbox (full of customer names), and a formview control. The problem I'm having is getting the formview to update when I change modes via radio buttons or listbox selection (see code below).
[Code]....
i have asp.net chart control and gridview control in updatepanle my issue is when i click on edit link in gridview my chart control is not displaying but when i refresh my page iam to see it why is so??
View 1 RepliesHow to manage user messages to avoid hardcoding messages accross the web application.
View 17 RepliesFor error messages, validation faults etc you have
ModelState.AddErrorMessage("Fool!");
But, where do you put success responses like "You successfully transfered alot of money to your ex." + "Your balance is now zero". I still want to set it at the controller level and preferably in key-value way, the same way as errormessages but without invalidating the modelstate.
How can we debbug a multi-thread program to see local variables of each thread using visual studio 2008.
View 1 RepliesI'm new to threading and have used it successfully, but limited. I can spawn a thread and have the main thread reference variables in the spawned thread, but I don't know how to allow the spawned thread to reference (and update) variables in the main thread.
Any example threading code I've seen on the web appears to be WAY more complicated than what I do, so I am unable to understand or integrate into my code.
Here is a quick example of how I use threading:
[code].....
Inside repeater control HeaderTemplate i have some LinkButtons and Checkbox I want to findout the object (Linkbutton or checkbox) that raises the event.
[Code]....
When i write such code i received error as A switch expression or case label must be a bool, char, string, integral, enum, or corresponding nullable type
I have UserControl and within that control i have asp:ListView. Inside the ListView i have a asp:LinkButton. When i click on the LinkButton the control raises full postback, no matter if the UserControl is inside UpdatePanel or is not.
UserControl:
<asp:ListView ID="lvImages" runat="server" OnItemCommand="lvImages_ItemCommand">
<ItemTemplate>
<div>
<asp:Image runat="server" ID="imgImageThumb" ImageUrl='<%#Eval("Image") %>' GenerateEmptyAlternateText="true" />
<asp:LinkButton runat="server" ID="lbtnImageAdd" CommandName="Add" CommandArgument='<%#Container.DisplayIndex %>'
CausesValidation="false" Text="Add" />
</div>
<ItemTemplate>
</asp:ListView>
Page:
<asp:UpdatePanel ID="up" runat="server">
<ContentTemplate>
<cuc:UserControl ID="cucUserControl" runat=server/>
</ContentTemplate>
</asp:UpdatePanel>
I am reading the Asp.net security documentation on msdn.I come across these tow terms and get really confused.
# WindowsIdentity = WindowsIdentity.GetCurrent()
which returns the identity of the security context of the currently executing Win32 thread.
# Thread = Thread.CurrentPrincipal
which returns the principal of the currently executing .NET thread which rides on top of the Win32 thread.
I have a password page and when someone enters an incorrect password I want to simply foil a brute force attack by having
bool isGoodPassword = (password == expected_password);
lock (this)
{
if (!isGoodPassword)
Thread.Sleep(2000);
}
I would expect that this would allow all correct passwords without stalling, but if one user enters a bad password another successful password from a different user would also be blocked. However, the lock doesn't seem to lock across ASP.NET threads.
I want a example of multithreading .i want to use it in a web form not on console.i am using C#.net .and how to use thread.sleep method for a particular thread.
View 5 RepliesI have a message (System.Web.Mail.MailMessage) whose body is 400 bytes long, nothing in cc or bcc, has valid to/from addresses. But when I get to System.Web.Mail.WebMail.Send(msg) I get the exception [HttpException (0x80004005): Value does not fall within the expected range.] Not sure where to look. Google only provided a handful of options, mostly related to CDO.
View 2 RepliesI am having a File Uploader. In that, I am trying to assign the file uploader value to the text box. I did this in java script. But when I tried to hit the update button it leaves me an java script error saying Access is denied.
View 1 RepliesI have question regarding printer option page which pop up when i click on print button on crystalreportviewer and when i click okay on that pop up page it displays print preview of the report.
Is there any way to skip that pop up window(Printer Option) and just display (PDF)print preview screen instead?
(I am not exporting report to pdf, just want to display printview screen and when the user click on print button it will print out the page)
I have tried following code but i am getting error:
"Object reference not set to an instance of an object."
[code]....
I have upgraded web application from VS.2008 to vs 2010. I was using previously ReportViewer 2008 control in a page and replaced with 2010 ReportViewer Control.
I have installed the ReportViewer Redistributable also in my local pc as well as in the server. Also as per the new requirement I have placed the Scriptmanager in the web page where the reportviewer control located.
While running the page, the reportviewer run the report and is not showing the data on the screen. It shows the blank screen. But If I export the data to execl or world it is showing the data. Also the page numbers in the reportviewer showing the total pages available in the navigation bar. I am sure the report is running and bringing the data to the screen but not showing it.
The below is the exact scenario, One form will be there and when user click on "Edit" hyper link other window will open to get more details. In that new window also I have a grid or a table which has other hyperlink which lead to open other window and in that window I will enter few details and save it....
[code]....
I have created my first MVC application. I am using forms authenticataion. I have created a custom action filter MyAppAuthorizationFilter which inherits from AuthorizeFilter. Inside this filter I'm authenticating the user credentials by checking them against a database table (by overriding OnAuthorize method). If the user is not authenticated, I am redirecting the users to a login page (which is view of LoginController). I am using this filter agaginst my main controller so that all actions in this filter will execute only if the user is authenticated.
I do not have any problem when I use the asp.net development server (shipped with Visual Studio). But when I deploy the app to our IIS7 server, I can see the login screen when I access the default url, but after entering the credentials (both correct and incorrect) and posting back the Login page, it stays on the Login page (clears the pwd, but not the username). Its never getting redirected to the home screen or invalid login screen.
IIS 7 server has .net framework 3.5SP1, but no MVC. So I deployed the System.Web.Mvc dll in the bin folder.
Here's my Code (I've omitted the views and models as they are not needed here):
[MyAppAuthorizationFilter]
public class MainController : Controller
{
//
// GET: / [code]......
I am using the below code where I put this tag on a .aspx page:
"<a name="tips"></a>"
Now if I from another page run the code in the hyperlink to navigate to this page2 where I have the above tag. The page will scroll down to this tag automatically where this tag will be at the TOP of the screen.
My question now is if it is instead possible to scroll to the position where you have this tag at the BOTTOM of the screen instead ?
[Code]....
Is it possible to take a screen capture of a particular area of a web-page from the web-page's own ASP.NET code?
I need to display 6 images that are stacked on top of one another using CSS, and I'd like to offer the user the ability to right-click save-as if possible by stacking the screen capture on top top of the original image stack.