One Form Multiple Uses
Jan 24, 2011
How would i go about creating a "Search Feature". I have all of the algorithms to do this, but at the moment it's hassle for me to have both forms, and 3 separate buttons for searching. I think its more complicated than it needs to be. I was thinking about creating a label at the top of form and using the following:
"If label1.text = "" then
......
End if"
But how would i get it to get the value of the text box from a separate form, and make form perform a separate feature, if you see what i mean.
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Jan 14, 2010
I have a program that uses two forms. The program opens to the Main form, and the user can navigate to the other form from the Main form through use of a button. Here's the way I've currently written it: When the Main form loads, it declares and instantiates the other form during the load procedure. When the user presses a button, the second form is displayed by means of the ShowDialog method. On the second form, there is a Return to Main Screen button which closes the second form, bringing the user back to the Main form.
So, here's the structure of the code:
Code:
Public Class frmMainForm
Dim frmSecondForm As New SecondForm
Private Sub btnSecondForm_Click(blah, blah, blah) Handles blah, blah, blah
[CODE]...
Here's my reasoning: Originally, I wrote the code so that a new instance of the second form was created every time the button was pressed. The problem was that whatever data was displayed on the second form, previously, was lost when the user returned to it a second time. Since the user would be switching back and forth between these forms, frequently, I needed that data to persist.
What is the best practice for accomplishing this:
1) Declare and instantiate the second form on program start, as I have done, and use the button simply to show the form?
2) Declare and instantiate the second form each time the button is pressed but maintain the variables on the Main form and pass them ByRef to a custom constructor for the second form? Is this even possible?
3) Something else?
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Jul 25, 2011
Is there a better way to make a form with multiple buttons opening different things than having a form that has lots group boxes for each tab. So in the begining each box will be invisible and when you click the button the corresponding group box will become visible. Is there any other way?It will be like a background image and it'll have buttons that will mask it with invisible buttons. when the button is clicked it will open the corresponding group box.
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Nov 28, 2009
I have multiple forms and have multiple declarations that I need for all the forms, is there a better way than declaring them each time on each form? Can a .dll do this, if so does it require the .dll to be a seperate file than the final .exe file. Or is there someway to reference the variables on other forms?
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Nov 3, 2011
So my question is that I have 2 list boxes in two forms aside from the main one. and I am trying to transfer what I choose in the side form to transfer to the list box.
several questions: Why does the blank list form I have in the main form create a problem when I enter a name for the list box and why does it appear in the box when I put it there? As you can see in my errors. It doesn't seem to recognize the listbox that I wanted to leave empty in the main form.
Second question is how do I get names to add in the main form list box. I believe I have the right code but I seem to be missing something else as well. I want the names to display in the main list box and the integers to add up together so I can separately figure the tax and shipping myself.
Here are some pictures and codes
Main:
Print:
Audio:
Public Class MainForm
Dim frmAudioBooks As New AudioBooks
Dim frmPrintedBooks As New PrintedBooks
[Code].....
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Apr 29, 2011
I've inherited some VB.Net code that I think needs some restructuring. The project has three forms, each of which is its own Windows Form file that inherits from System.Windows.Forms.Form.The problem is that all these forms share a common navigation menu bar that does not change as the user switches between forms, and so the original programmer has duplicated the menu code in each of the three files to generate the menu on each one! I figure this can't be right.
To restructure it, I thought I would create a base form that implemented the menu, and then let the other forms inherit from that, but I ran into the problem that Windows forms already inherit from the class mentioned above, and can't inherit from another class.I noticed I can add an item called "inherited form", but is that the way to go here? The problem of creating multiple screens with a common menu bar has to be incredibly common. Is there one true way to do this? Should I use inherited forms, or should I by have just one base form and make the other screens just plain classes and not forms at all? Or something else I'm not thinking of?
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Apr 6, 2011
I have some VB.NET web forms that have multiple buttons (Submit, logout etc.) If I enter data in a textbox and want to use the submit button, if I actually click on the button it works fine but if I hit ENTER instead it appears the Logout button always takes precedence. How do I control this action as most people hit ENTER rather than actually clicking the button?
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Aug 26, 2010
When I click a cell or a row in a datagridview I want to be able to open a new form with several textboxes and comboboxes in it and to be able to edit the selected row. The only thing I managed to do so far, was to fill a texbox from the form with the info from the sellected cell using the following code.
Dim
cell As
DataGridViewCell
[Code]....
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Oct 6, 2009
I'm developing a Windows Forms app that will be used to update information on 2 database tables.The 2 tables are related, so the ID fields in them will correspond. In the app, I'm using 2 DataGridView controls. THe first (Status Rules) is DataBound to a DataSet and visible when the application loads. The other (Status Flags) is empty and hidden. The user will select an ID field from the RulesGrid which will fire up a connection to the database and display the entry in the Status_Flags table that has the same ID as the value of the cell the user clicked.I thought of using a standard conditional SELECT statement to do this, but the Flags grid isn't displaying any data. My code Follows:
Private Sub RulesGrid_CellClick(ByVal sender As System.Object, ByVal e As System.Windows.Forms.DataGridViewCellEventArgs) Handles RulesGrid.CellClick
Dim conn As New SqlConnection('ConnectionString)
Dim sql As String = "SELECT * FROM ctblMKA_Status_Flags WHERE intStatusID = '" & RulesGrid.CurrentCell.Value & "'"[code].....
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Sep 13, 2010
If I create a console application for example with a class named "Person" I can create an object variable with a ceratin name only once. For example:
Module
Module1
Sub
[Code]....
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Mar 3, 2010
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.
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Oct 25, 2010
I have a form that is going to displays the same field from each of my 185 records. How do I get it to show all records for that field without using a data grid. If you think of this form as a layout of a parking lot and each field is a parking spot then what I am trying to do is display the assigned parking spots. When you click on the spot I want to open a second form that I already created to display and edit that spot.
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Dec 18, 2009
I have an application I made to monitor IP cameras. Right now I just have a button for each camera, so that when they want to swithc to that camera, all the user has to do is click the button to switch to that camera.What I would like to do is set it up so that I have multiple web browsers on the form, each one for a camera. However, the problem is that the actual video feed is in a small section of the web page, so the user would have to scroll to the right position for each web browser to be able to see the video feed.What I want to do is configure it so that when the page loads, it automatically scrolls to the right position so the user can see the camera feed for each camera (each in it's own independent browser) without having to adjust each browser.
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Mar 18, 2011
I am writing an application, and i have a user form, which will be the same for the users and the administrators. on different pages.
i want to only create the form once, and then be able to put it on two different aspx files.
i tried it with the "control" , but it then gets really complicated trying to access fields on the control from the aspx page to do the calculation, etc.
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Feb 14, 2012
I want to give a form two designs, one design on application startup and another when a button is pressed. Can I do this with another designer?
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Feb 29, 2012
I am doing a project for my company. In that i have to enter the number of items in the first form and in the second form i am going to enter the details of each items. So i have to repeat the second form to get the details number of times depending on the value i have given for number of items in the first form.From the home page i will be entering the values for the master file. after entering the values for the master file then i have to enter the details of the individual item details in a transaction file.
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Jan 25, 2011
I have the following problem, a table "table1" contains 10000 telephone numbers, this table is source for 5 combo box contained in a form, I need that when I select the first tel N in the first combo, this number is not any more available for the combo 2, when I select the second number in the second combo, the first 2 numbers of the table 1 are not any more available for the combo 3 etc. Every record (in form) contains 5 combo. The Tel N selected into the combo are source for other table called "table2". I've try with all the type of query between table 1 and table 2, and use the result as source for the combo, I've try with IIf but this is works only for the first combo.
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Aug 12, 2009
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?
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Mar 7, 2010
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.
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Dec 6, 2006
i have a multiple form project in vb.net 2003.from my main form i activate the 2nd and from 2nd 3rd and so on.but the problem is when im going back from higher 3rd to 2nd and from 2nd to first, the closing event of my mainform doesnt seem to be working. well i have it me.close but it is still in debugging mode. i could only make it stop thru the stop button.
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Mar 9, 2011
I have eight NumericUpDown controls in my form, I call them NumericUpDown_1 thru NumericUpdown 8. I first noticed when I set a breakpoint in say NumericUpDown_1 routine and have code inside this routine to manipulate say NumericUpdown_6's value, the code would immediate jump to NumericUpdown_6 routine because the value changed. This makes sense since the handler fires due to the default handler - numericUpDown_valuechanges. But I do not want this to happen so I removed the handlers for all NumericUpdownX routines, one thru eight and instead I use "addhandler" and "removehandler" statements inside the individual routines to "mask off" this problem every time I change a numericUpDown.Value that is not in it's own routine.
My problem is this does not work. What I found is if I use removehandler numericUPDown_x.valuechange addressof numericUpdown_valuechange statement the coding would work however when I'm done in that routine I follow up with addhandler numericUpDown... statement and I'm back to the same problem. A different numericUpDown routine will fire because I changed it's value in another routine but I had the handler removed before I changed it's value so I don't understand. It's almost like it remembered that it's value changed as soon as I turned back on the handler using addhandler. I'm working with Visual Basic 2010.
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Aug 4, 2010
I would like to have two different panels (with associated buttons, textboxes, etc.) on the same location on a form. Is this possible and if so, how do I go about doing it? I need this to control two different boards with the same application.I realize it would be difficult to edit the form if they are on top of each other. Is there a way to place these panels apart while designing/coding, but have them located in the same spot on the form during runtime?
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Jul 6, 2009
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?
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Jun 10, 2011
In reference to this post [URL] I have another more specific question about passing data between forms in VB.net I have a form with over 50 variables that I need to access on a second form and if i followed the method above, my form 2 will end up way too long and time consuming. I'm making a complex calculation software that prompts user inputs values and calculates all those unknown variables. I need to display all the resulting values in the 2nd form. and from the 2nd form , i want to give the users an option to export all those values to an ms Excel sheet.
[Code]...
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Jun 22, 2011
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]...
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Mar 29, 2009
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
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Aug 22, 2010
I have a scheduler with multiple views. 1 day, 3 days, 5 days and 7 days.I have figured out how to scale each view and it prints correctly. What I am having problems with is how to allow the user to print these different views from one screen. I have a dropdown box with 1 day, 3, day, 5 day and 7 day. On the scheduler I have put the same procedure as Print and Print2 with just minor differences for the scaling for each view. Print Document1 and PrintDocument2 are on the second form. For some reason, no matter how I call the print document2 I end up with Printdocument1. I have checked it over and over but am getting no where. Would there be any reason I can't use multiple printdocuments on one form for printing different procedures?
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May 24, 2009
Is there a simple way to show multiple images on a form?
(Somting like this?
-> Movie (American Gangster) = Picture 1
-> Movie (American Pie) = Picture 2
the data must be variable....
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Aug 13, 2010
I am creating a Jeopardy type game and I want to be able to have the same form show on multiple monitors at times and at other times show a form only on one monitor. I have no problem getting a form to show up on the second monitor, but when I try to show the same form on multiple monitors I run into problems.[code]...
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Aug 12, 2010
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.
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