I've got two sets of lists with nearly 800 items that I need in 32 different drop down comboboxes (before you ask, that is required and it can't be simplified). Understandably, populating each of them slows down the creation of the form. This happens to be a child form that these drop downs are on and there could be more than one child form displayed. I've assembled the lists in List(Of String) objects and set each of the datasources of the comboboxes appropriately, but it still takes several seconds for them to populate and display for the first time. This is also problematic if the datasource gets updated (items removed, added, renamed) because I have to wipe out all the items and create the list again in all active instances.
I have a form which displays temperature and humidity data for a device in the field. I have multiple devices. Rather than creating a separate form for each device, obviously it is much better to have a single form that I instantiate, pass data to, and display. The devices are listed in a treeview, and when the user double-clicks the node, I create an instance of the form, pass the device's data to the instance of the form, and display the form. All of this works perfectly. However, I have a challenge: If the form for a particular device is already open, I don't want another one opened when the user double-clicks the node.
However, whenever I place logic in the program to check for the existence of the form and only allow another instance to be created if one doesn't already exist, it prevents me from creating a form instance for any other device that I may wish to view, simultaneously. So, I have a dilemma -- allow the user to display the data for multiple devices, including allowing multiple forms to be open for a single device, OR only allowing one device to be displayed at any given time.
I have set the "Make single instance application" check box.And when my application version is 1.0.0.0 for example, it is OK and won't load multiple instances.But when I create a new version, for example 1.0.0.1, then I can run 2 instances of my application, when the 1st instance is 1.0.0.0 and the second instance is 1.0.0.1.What should I do to prevent this?
2. FunctionLayer -deals with Common Operations which get results from DataLayer and return results to Forms.3. User - deals with User. (For Reusing the User Class in other projects, i have separated this class)Here in Class2 - I have an instance of Class1( ie., DataLayer) for DB Operations.imilarly in Class3- I have an instance of Class1( ie., DataLayer) for DB Operations.Now in my form, If i create Instance of Class2. But When I need user functionality in this form, I have to create an instance of Class3 to this form.
I have a control which consists of a couple of labels and a couple of buttons side by side.I want to add multiple instances of this control to a panel.The problem I have is with positioning/formatting.Whenever I add the control it just gets added on top of the previous one.Should I be using something other then a panel? Are there any tips ot tricks I should be aware of ?
I have two forms in my application. Form 1 is a listview that is populated with unique Customer IDs. When the user double click the listview on the particular Customer ID then it loads Form2. Form2 has many listviews within it such as a listview for the Customer telephone, another listview for their addresses etc and all the data presented in Form2 listviews are based on the Customer ID that the user clicked in Form1.
So here is my question...I want the user to be able to open Form2 with that particular details of the customer but also to go back to Form1 and double click another Customer ID and opens Form2 again (such as replicating Form2) with the other Customer details.So the moral of the story is i want the user to be able to have many instances of Form2 open each time they wish to view a different Customer ID without having to close Form2 down every time.
I have a form (form1) and I havea button on form1 (button1) that will start a second form (form2).How can I make it create multiple instances of form2 when button1 is clicked?i tried a process module that the studio comes as standard but it does not allow me to start multiple instances...how can i do this?
I am writing an application whose main purpose will be to collect user-entered data on a prescribed time interval (to be used by a dr. during anesthesia to collect patient vitals during surgery). I am attempting to accomplish this by having a form opened from the main window on every tick of a timer. The problem, is that if the user is a bit slow in entering the data on the first window, and the timer ticks again before they submit the first form, when the form is reopened (currently by simply using a show() command), the process of opening the form again simply overwrites the original form rather than creating a second instance.What is the best way to open a second (and possibly 3rd, 4th... nth) instance of the same form?
I am working on a project where i have a home form which has two buttons for login for employee and administrator.after clicking on button login form will open,but i want as soon as login window opens d previous home form must be closed or hide..also there is link on login page for home,but as soon as user click on home link new instance of home form is opening,hnce i want to stop dis multiple opening of the form.i tried close() and hide() but no use.[code]...
need help please on how to prevent multiple instances of a form at runtime in vb so tha when a user clicks a button to load a form it loads an if the user clicks the same button again whilst the other instance of the form is running it doesnt open a new one but insted sets focus on the currently running form.br2
is they a way of keeping track for multiple instances of the same form? example saving the contents of a textbox ,the positition of the form and size when using the code below to create the new instance of the form ,i would like to save the contents of multiple form2`s from form1 ,can it be done??
When I create more than one instance of the same form and I call a method on any of these instances, the code only fires on the most recently created instance. Even when I click a button on that form, it executes on the other form. How can I call these and keep them as distinct objects?
For example: if I build Form1 with a public method called ChangeMyColor and a button to call that method. Then in the main app I set MyForm1 = New Form1 and MyForm2 = New Form1, then call MyForm1.ChangeMyColor, the color changes on the second instance. Even if I click that button on the first instance, the color still changes on the second.
I have an MDI parent(MDIParent1) form with a child form(frmMain).The child form got a Tabcontrol(TabControl1) in it.I am trying to load other forms(say form1) in my application to this tabcontrol as tabpages. I use the following code for that
I have 30 instances of the same form running. Video array with different video on each. Each form is named "oneForm". I'm looking for a way to close all forms with one click. I have found that I can hide the forms no problem like this.
for each killfrm as form in my.application.openforms if killfrm.name = "oneForm" then killfrm.hide()
Within the subroutine, I am counting the number of open Forms and dividing the bounds of the screen by the number of open forms everytime a button is clicked.his gives me a way to Size each video box perfectly according to the number of forms open.This is where I have found a problem. The size of the new window only sizes the newly opened on and will not resize the ones that are already open. I will give an example of my subroutine.Note: Because of the nature of my program, I am not allowed to take any code out of the work zone and so I will be summarizing what I am doing rather than showing the actual code.
Private videoShow (byval videoName, byval videoIp) dim videoForm as new form videoForm.size = New Drawing.Size
Ok I have a project which has a MDI parent. Inside the parent I have multiple isntances of a form load(frmLine1t5). When my program loads it will load a different form(frmSelect) and if I manually load a different form(frmRetests) I can put frmSelect on top of frmRetests and bring one another to the front if it's clicked on(without using the bringtofront method)However as soon as I load a single instance of frmLine1t5 I immediately can no longer bring ANY form loaded into the MDI parent(before or after frmLine1t5 has loaded) to the front. I can only bring them to print IF I use .bringtofront method
I've written an application with about 30 forms and am almost ready to publish, my biggest concern though is that i'm not sure if its a normal thing to do having all these forms and hiding, disposing and showing forms throughout the use of the application.I've toyed with the idea of converting to a MDI Child / Parent interface as well as having one form with lots of subcontainers that are hidden and then hiding / showing them as the navigational buttons are shown.Ive worked on this application for about 8 months now, but would be happy to rewrite the interface and appearance of it if i know that it is not generally an acceptable practice having forms flashing open and closed while navigating through the application.
Is there a way to code a common handler for every instance of an event? I am trying to display the .text property of a control in the status bar on MouseEnter.
Private Sub DisplayMenuText(ByVal sender As Object, ByVal e As System.EventArgs) Handles ?.MouseEnter tsslStatus1.Text = sender.ToString End Sub
After making the changes or adding a record I use invoke childmethod from my toolbar to call these subs. The first table updates and adds, but the second does not. I have set all of my textboxes databindings and double checked them. I get no error, but it does not update the second table. What am I doing wrong?
Public Sub AddRecord() 'Clear out the input data fields on a new Add. ClearInputFields()
I have to prepare about 125 or 150 Loading Slips for various Mines to move carting to our various Factory daily into Windows Form of ERP System.
Just like here: Date:18-12-2011, Requirement No.001/11-12, Mines No.OP-128, In Charge Name: Karsanji Plot=0,Satta=0,Dump=6, Transporter:Ghanshyam Roadlines Destination:Madhapar Here Some Button to generate/modify records: Add,Edit,Save,Delete,Previous,Next,etc If I distribute 15 trucks for Ghanshyam Roadlines to move carting from OP-128 to Madhapar then I will have to entry 15 times into Windows Form of ERP System for creation loading slips numbers from 1 to 15. Here all my data to input 15 times into ERP is same, so why is it not possible to create multiple reports with single entry form?
Say I have a code with 3 methods that do some pretty intensive work. Would executing these methods on 3 seperate threads be faster then executing them one after the other on a single core cpu? And what if it's a dual core or HT?
I would like to be able to set Control visual properties such as color, boarder, flat style, etc. on the base class of the control so that as I add new instances of the control, each instance inherits the visual properties of the base. I have tried using Application Settings but it appears as though I need to reference an application setting manually each time I add the control to a form. This is a Windows Form question.
Any best method of managing multiple SQL connections .net (VB). My application connects to four instances of SQL Server (2000, 2005, 2008, 2008R2) restoring databases, modifying data and taking backups. In addition to managing databases the app also has its own DB (on the 2008 instance) for storing various data. I'm using two methods to connect to the instances, SMO (For backups, restoring and retrieving information about the databases, size etc) and SqlClient for querying each database for many tasks such as updating fields and executing sql scripts.I have multiple forms for performing various tasks so there are many places I'm opening / closing connections.
Would it be best to maintain a persistent global connection to each instance from the application? (Two in total, one for SMO and the other for SqlClient) or open close a connection for each task I'm performing?) I'm not using LINK as I need the tasks to be as fast as possible. The connection string will differ on each connection (Based on Instance and Database being connected to) how would I manage this? A string in the config file for the applications database would make sense, as that would be static but the databases being worked on will vary with each connection. Currently I'm creating a connection for each instance within the main form:
Dim 2000Connection = New SqlConnection("Data Source=" & SQLServerName & _ "SQL2000;Initial Catalog=Master;User ID=sa;Password=P@ssw0rd;Pooling=True;") Dim 2005Connection = New SqlConnection("Data Source=" & SQLServerName & _ "SQL2005;Initial Catalog=Master;User ID=sa;Password=P@ssw0rd;Pooling=True;") Dim 2008Connection = New SqlConnection("Data Source=" & SQLServerName & _ "SQL2008;Initial Catalog=Master;User ID=sa;Password=P@ssw0rd;Pooling=True;") [Code] .....
I have the following problem. (VB.Net 2008)I have created a class (myFirstClass). In this class there are a lot of calculations being made wich gets fired by events in that same class.Now i want that same class to be able to fire more instances of itself. However i noticed that each time i fire an event from a Sub the program waits till the event is finished before going to the next line of code. This is a problem since i want the event wich fires a new instance of the class to fire it and forget about it.
My ultimate goal is to get a list of PIDs and have a user select 1 of them.For example: the process image name is program.exe. The application name varies for each instance the program.exe is run, and therefor each application name has its own PID associated with it. By application name I mean the Task name under the Applications tab of Windows Task Manager. Another issue I face is that some systems run x64, so the name is no longer program.exe but program.exe*32
So my issue is, how do I search for program.exe, or on x64 platforms program.exe*32, and if there are multiple instances of program.exe/program.exe*32 running, how can I get a list of PIDs for each and associated them with the application name as the Task name under the Applications tab of Windows Task Manager.that might sound a bit confusing! So if it is, please let me know and I will try to explain more. Any reference guides or example code would be greatly appriciated as I have only used the "System.Diagnostics" but once.
How can I check for multiple instances of my visual basic application? When the user runs the application, I want to know how many instances are already open.
I have an application which the user can open multiple instances on the same machine. However, a section of the app would have sync problems if more than 1 instance has control over it. This is where I thought of transferring control, or sharing, between them. What should I be looking into?
They would have to be able to identify which one of them has control and to send text information over. I thought IPC or Named Pipes could do the trick, but I'm unfamiliar with them and examples seem to indicate only a single server will work. Here, I have multiple instances of the same app and every one of them needs to be able to listen for that request for control.
