I am currently developing a WPF application that will utilize existing WinForm dialogs. I'm experiencing a long lag between the time I call ShowDialog() on a WinForm to the time it is displayed.Even when reusing WinForm dialog objects the lag time is nearly as bad on the second hit. Meaning that the problem isn't in the constructor. have a work around to increase speed or know why the speed is so slow?
View 2 RepliesI actually have gotten the events firing like I expect except for trying to close the dialog window.
Background: I have a wrapper around my "Jabber Client" that sets the delegates for the client wrapper and basically generates a messageProcess event. This event is wired in the main program Class[code]...
Here's the setup: I've created a class that represents a temperature and humidity monitor. This class handles all of its own operations (connects to the monitors via TCP, reads the temperature and humidity values at set intervals, logs the data, sends email notifications, etc.). I've got a single Windows form that has two textboxes for displaying the values of temp and humidity. When I start the application, I simply instantiate an object of this class and let it do its thing. Every five minutes, it opens up a socket connection, pulls in the data I want, sets the Temp and Humidity properties of the object to the values it obtained, and fires a DataUpdate event which is captured in an event handler in the Windows form.
When this event occurs, the textboxes on the form are updated with the values from the Temp and Humidity properties of the object. Works like a champ. However, I've been playing around with multithreading. Since a disconnected device will cause my entire application to block when it tries to connect, I decided to place the socket connection/data acquisition method into a separate thread. If it can't find the device, no big deal -- at least it doesn't lock up my UI. This thread is instantiated and started inside the object code, NOT the Windows form.
Here's my question, the socket connection/data acquisition method is run inside this new thread and sets the properties of the object when it's done. So, why do I get an illegal cross-thread exception on my Windows form, now, when I try to update the textboxes? It seems to me that the instance of the monitor class is running in the same thread as the Windows form. I only employ a separate thread when I want to run the socket connection/data acquisition method. Is my understanding flawed? I can display the updated property values in message boxes that are called from the Windows form. I just can't manipulate the textboxes.
I have some shared code I need to use both in a WinForm and a service. How can I test if my code is running in a service, so I can avoid problems with modal dialogs.
View 2 RepliesHow do I get at and invoke the properties dialog supplied by the manufactured? I have search this many times and found that most of the posts contain solutions that the original poster claims don't work The standard PrintProperties class does not handle a lot of printers who have specifictsks, eg a printer designed to pint on the face odf CD/DVD. I have found examples of how do this in VB6, but every examply I find for the versions of VB Basic after thet have comments that the solution provided did not persist the user chnges. Bow, come on, there has to be a way of displaying and persisting the user choises the dialog bog provided by the printer manufacturer!Terry
View 3 RepliesI have a very annoying problem and I'm trying to find the simplest solution possible, but I seem to keep complicating it.
My program displays a custom dialog box using the ShowDialog function (I create this form using a New constructor), but while my program waits for input in the dialogbox, my program continues to run other code, (I'm assuming initiated from other messages, but I still can't find good information on this, so as an aside to this topic does anyone have a reference about this), and arrives at this same point where the dialog box is to be displayed and displays it. So I end up getting a flood of dialog boxes.
My goal is prevent this excessive amount of dialog boxes. If the program arrives at this dialog initiation point I would like it to wait/pause until the first dialog box is finished.
I'm using paging in a WinForm application (VB.NET) using the code below. This works fine, but when I click on the column header this will only sort the rows from one page. If I move to the next page, the sorting is gone.[code]...
View 2 RepliesDoes anyone out there have any experience programatically retreiving the lat/long from a GPS attached to a mobile PC?team I'm on is currently looking at hardware options--as the programmer who will eventually have to live with whatever is selected I was wondering if anyone out there has had experience writing .Net programs that interface with a GPS?
View 4 RepliesI am presently working with winforms and I would like to add facebook like button to my winforms.So at present I have downloaded facebook developer toolkit and after that I am trying to add the like button.So I would like to know how to proceed further to achieve in adding the like button.
View 1 RepliesI am a newbie using VB.net in VS 2008. I took over a vb.net winform application that has a binding navigator in it. The users wanted to add 2 new fields to the form. I added the new fields to the SQL Server 2005 database. I refreshed the Data Source tab in the project. It recognizes the 2 new fields.
I dragged them onto the form. When I go to add a record through the application, it does NOT save these 2 new fields. I check the properties for these 2 new fields under "Data Bindings" and it shows under the "Text" property the correct Binding Source and column name. I need to store these 2 new fields to the table.
I have Created an windows Application in .Net, when i start it first time, it takes lots of time to load. however i have used StoredProcedures to get data from database.So is there any technique to decrease the load time of an application?
View 2 RepliesI have hierarchical tree like folders,
[Code]...
I want to populate these folders to tree control. Then if we click any node of the tree control, that should open the related folder. And can we design treeview control like flowchart or powerpoint smartart organisation chart?
I have an application that insert or update Data to an SQL server every 2, 3 hours.I can't use the SQL server itself (creating a new job). Instead I defined a timer which executes the code every 3 hours.The application runs in the server - a winform application.And this is the problem, when I logoff the application is being closed.Is there a way to keep the application running?
View 5 RepliesI'm a total newbie in programming. I have question about the deployment of winform application. I have created a winform application. But I'm not sure if the users have installed .Net version 4. I have put my winform application at my website and the users will download it to desktop.
My question is: How to automate the process of downloading and install .Net 4 if users have not install it? What are the recommended ways of deploying winform applications to users?
I would like to make the Tab movement can also pressing the "Enter" Key. I have google and found the code which possible to used. But I found its not running fine with me. When I press "Enter" key,it runs fine for the tab movement. But if I put something into my textbox,it only allowed me to put 1 character and it will move next. Because the Textbox 2 can able to put in any kind of numbers. But after add in the code that allowed "Enter" key move the Tabindex,it will move to the next tab index after I lick 1 character.
Code:
Private Sub TextBox2_KeyPress(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyPressEventArgs) Handles TextBox2.KeyPress
If Keys.Enter Then
SendKeys.Send("{TAB}")
[Code] .....
How should I do to make the "Enter" key press work as tab?
I was asked to build a winform exe that receives arguments from a web service and decide in which mode the application should start.what is the best way to design and build the application?The application needs to receive 3 arguments.
User name. - stringApplication mode - Boolean (user read write privileges)List on string.
Where do I receive this arguments in the new method ?
I am trying to load bulk images and trying to put them as a slideshow and it's working fine. Now I would like to have some effects like flip out,ease out effect and fade effect on those images when changing them without using any user control as I would like to do with the existing picturebox.Is it possible to do so?
If so can anyone point me to some resources.As I have done googling and found some useful links and I am placing here that might helpful to someone.And all these have use seperate usercontrols to do, and I am not looking into that.[URL]..
Now I would like to have some effects like flip out,ease out effect and fade effect on those images when changing them without using any user control as I would like to do with the existing picturebox.Is it possible to do so?
View 2 RepliesWhen a user click the .msi, i want a folder called "Your Files", which comes with two small images by default, to be created in C:UsersYourNameDocuments. In short, MyDocuments.
What i did is put the following code in program.cs:
string myDocuments = Environment.GetFolderPath(Environment.SpecialFolder.MyDocuments);
string downloadArea = System.IO.Path.Combine(myDocuments, "Your Files");
System.IO.Directory.CreateDirectory(downloadArea);
Just before:
Application.Run(new mainForm());
The problem is, this folder will be created every time the user runs the application which is not a good solution, also in this case there is no place to load the two images so it can be loaded while the folder is created. I want the folder to be created once preferably while installing the application, so even when i uninstall the folder "Your Files" and its sub files be deleted automatically along with the program files. I tried to do it via Setup Project, but i couldn't.
I would like to enable my Windows Forms Desktop Application to integrate with PayPal so I can charge my users through the WinForms app. Are there any resources regarding this, or can it be done?
View 2 RepliesI want to create an icon for my winform application. What are the common tools to create icon for winform?
View 3 RepliesI run the app under current logged in user from the service.To give you background, I have a VB.NET Windows service whose sole functionality is to run a Winform App at a specified time. Apart from that it also sets a system wakeup timer so that the system can be woken up at the specified time, if it goes into standby/sleep, to run the app. This service has to cater to XP/Vista/Win7 desktops on our network. This service won't run on servers and laptops.
The Winform App shows a UI for the user to provide some inputs. If the user does not provide the input within 15 minutes, then it defaults the value and then goes into system tray icon. The user can click on the icon and change the values later (within in a specified time frame and that too only twice).
There is absolutely no interaction between the service and the winform app apart from the service starting the app. It also monitors if the app has been killed by the user/crashed. If it has been killed/crashed, then a new instance is run after 30 mins from previous run.
If there is no user logged on, then also I want the app to be run at the specified time. As I said before, the app has a default timer. So if some user has just logged off from the system, then defaults would be set by the winform app.Now coming to why I am stuck with this design - I cannot use TaskScheduler because it has been disabled on all machines and security team is not willing to change it. TaskScheduler had the option to wakeup the machine from sleep and other things. So basically I ended up creating a service which is acting like task scheduler.
Currently when I run the app.exe via process.start() within the service, its running under SYSTEM account as the service is also running under LOCAL SYSTEM. So basically I am not getting any UI. Is there anyway to run it under the current logged in user? I am not worried about multiple user login as we wont be running it on servers and switch user is not enabled on our desktops. Even if somebody has done a remote login via mstsc, then also I need the run the app and show the UI to the user.
I want to package and deploy windows app which has images in allimages folder,resource folder is also generated that refers to all images in my vs 2008 application.I have calc.exe
in debug folder.I tried deploying using setup project that uses windows installer, when i run application some images r not seen and error is generated.whatt r exact steps to
package and deploy winform application in vs2008.
About 5 years ago I wrote this program in Excellusing VBA to compute commissions, income and expenses for the real estate agents in my wife's business.The company is made up of about 50 agents. Part of the program includes a combobox on a main form when a name was selected it also selected, the agent id, and the split the agent was on. It would calculate the split expense that my wife got by multiplying the split percentage from the combobox times the total commission.The main form also contained various other comboboxes, list boxes, and text boxes to gather such info as property address, selling price, titles company, transaction credit,income,Once all the info was complete my wife was asked if she wanted to save the transaction. If the answer was yes, the info was transferred to the permanate database, a commision report for the agent and my wife was printed out, and the temporary database was cleared.
View 1 RepliesWhenever I modify a file in the IDE in Visual Basic Express 2008, and then press the "Save" or "Save All" button, the "Save As" dialog opens, then says that a file of that name already exists and requests confirmation of the save. This didn't happen in Express 2005 as far as I remember.
View 3 RepliesI'm trying to update a row via c# winform application. The update query generated from the application is formatted correctly. I tested it in the sql server environment, it worked well. When i run it from the application i get 0 rows updated.Here is the snippet that generates the update statement using reflection - don't try to figure it out. Carry on reading after the code portion:
public void Update(int cusID)
{
SqlCommand objSqlCommand = new SqlCommand();
Customer cust = new Customer();
[code]....
The above final update statement works on the sql environment, but when running via the application, the execute non query runs ok and gets 0 rows updated!
A year ago I saw a beautiful simple code that gets a data table and saves it in an excel file. The trick was to use the web library (something with http) and I'm almost sure it was a stream. I find a lot of code with response but I can't make it work in a win-form environment. There is also a cell by cell code - not interested -too slow. I want to paste it as a range or something close.
View 5 RepliesI have following code for 3 DataGridView Controls in my VB.NET winform application. How can I simplify this code?
With DataGridView1
.Columns.Add("Column 0", "TaskName")
.AutoResizeColumns()[code]........
Here's the scenario, winforms application, monitoring via Task Manager Processes Tab.On initial launch spins up to ~61,000K (initial data grid and data loads)If I minimize the application, not touching or doing anything the Mem usage drops to 1,380K.When I restore the application is spins back up to only 5.8K
So my question is, does the minimize send some internal message to clean up resources since the application in question is not in focus?The first app I noticed this in happens to be VB.NET, but I've observed the same behavior in my main C# winform applications.
I am working on a Windows Application where i need to check a file exists in particular library with user crediantials.
Note : .Net framework 1.1 (VS2003)