Vs2008: Why Form Is Not Opening
Mar 30, 2010
I have a project in VS2008.Net3.5 with a Module1, form1 and form2.
[Code]...
Question: At the beginning I am opening form1 from sub Main(). Now from the menu I am openning form2. In form2 I am clicking Done button to hide form2 and go back to form1. It works fine in the 1st trial. Keeping form1 open for the 2nd time, I opened form2 from the menu. Now when I Click the Done button 2nd time it just hides up everything. Form1 does not show UP. It just exits the whole application. But in my btnDone event, I have frm1.show().
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Feb 11, 2010
I have a project in VS2008.Net3.5. I have 3 forms in total. The Sub Main() in Module1 first calls the Form1. Then Clicking Button1_Click event in Form1 opens up Form2. In Form2 I have a text box that I will fill out from Form3. But when I am Clicking Button1_Click event in Form1, it can't keep Form2 open but it opens up Form3 directly. I dont want this. I want to open Form2. In Form2 I will press the textbox and then we have Form3 open. But this is not working.==============
Module Module1
Public frm1 As Form1
Public Sub Main()
[Code]....
The Sub Main() in Module1 first calls the Form1. Then Clicking Button1_Click event in Form1 opens up Form2. In Form2 I have a text box that I will fill out from Form3. But when I am Clicking Button1_Click event in Form1, it can't keep Form2 open but it opens up Form3 directly. I dont want this. I want to open Form2. In Form2 I will press the textbox and then we have Form3 open. But this is not working.
I knew that in Form2 the first focus is going to the textbox and it then opening the Form3 for the GotFocus method. How can I move the focus to other control in Form2 instead of the default focus to my textbox. Or is there other event method other than GotFocus?
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Jul 24, 2009
I've made a few really simple VS2010 projects. I used .NET 3.5 for the last one. Should I be able to open them in VS2008?
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Jul 23, 2009
how to open an excel 2003 file in VS2008,what i want is to open an excel file there is only one sheet in it and 4 columns of data to read row by row and change certain values. that's it.
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May 10, 2011
I have an application (hyperterminal) that I have loaded inside of a form. I know how to use it when the application is open outside of the form but how do I use appactivate to interact with it inside the form?
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Jan 26, 2010
I just moved from VS2005 to 2008. All seemed fine until I started playing with locally cached data sources. After that I started getting this problem and now I get it even when starting a new project. I start a new project and debug, Form1 shows and all is well. If I add a combobox to the form and debug the form immediately closes. It doesn't seem to do it for other controls.
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Jul 18, 2009
Im currently working on a project using VS2008. One of the features of this applications is to enable the user to change the theme either buy selecting preset ones or defining there own. The themes used in this application are not the default windows ones. I basically created my own window, titlebar etc... with the use of panels and removed teh windows form borders. So its basically coloring the controls on the form. At the moment the theme information is stored in a "txt" file and when the application loads, it applies the theme to the current form. However, there is more than 1 form within this application. I dont want to write many lines of code to apply certain design/appearance properties to every control in the form. So is there a way to apply settings to a group of controls?
EG: Make all textboxes BackColor Blue
My application also has widgets. All widgets are panels with their names prefixed as "Pnl_WIDGET". Is there also a way to set propeties to all panles with the name beginning with "Pnl_WIDGET"?
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Mar 20, 2012
im currently designing a student application form in my VS2008 Project.Theres a lot of information that the end user needs to insert for eg, Applicants Info, Parenta Info, Medical history etc What i want is some advice on how i can design this? At the moment i have too many textboxes and comboboxes for the information that needs to be provided and im losing space on the application form. Do i split the form into different parts using tabs, ie tab for student, tab for parent etc or is there a better way?
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Feb 4, 2009
I am trying to create a basic windows form on VS2008. I dont see intializecomponent() method in my form. Also, I added a few controls on to the forms and set few properties for those controls on design view. Where is that code getting stored?? it isnt on the code behind file.
I know thr is no html code behind file for window forms?? also, where is intializecomponent method. Please help me out. I have been trying to find this out for such a long time now.
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Feb 19, 2010
I have 2 modules and 2 forms. In the module1, I initiated the form classes and also here I have my public appexit() method.In module2, I have another class(in the form of a keyboard done by code). Form2 use this class as its control.I have:
form1_closing()
mybase.close()
)
[code]....
Now when I call appexit() in my module1 from form1, I can see that the debug is going into form1_closing but when it goes inside form2_closing, it crashing the application here.I am developing mobile device application in Vs2008.Net3.5.
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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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Jan 15, 2009
Whenever I want to reopen a project that I didn't worked on for several month and want to view my form in design mode I receive following error.
Warning1Method not found: 'Void System.Windows.Forms.Design.ParentControlDesigner.WndProc(System.Windows.Forms.Message ByRef)'.00
[Code]....
I used this project in VB2005 express, but also in VB2008.
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Jun 7, 2009
In the main form the user can choose to download information from a device.Since this request takes time, when "download information" is pressed I open new form in a separate thread: Private Sub RunDownload()
[Code]...
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Jun 30, 2011
I would like to know the event order of form which is executed while opening form. I am showing my form using following code and the code in form_load event executes twice. Once when the form variables are initialised and second when form is displayed. I want it to execute once only. form showing code:
[Code]...
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Feb 10, 2010
I have a module with Main(). I am calling a form1 from this Main(). Why Form1 is not opening. I set Main() to run at the first in my Project propertis. I am using VS2008.Net3.5 VB code.The Code is:
Module Module1
Public frm1 As Form1
Public Sub Main()
frm1 = New Form1
[code]....
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Dec 12, 2011
I have two forms and a button on the first form. What i want is when i click the button the second form to show and the first one to close.But this isn't working with:
Form2.show()
Me.close
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Apr 10, 2009
I am a bit confused on the correct way of opening a form. I generally practiced form1.show to open a form, but i came across the following code to open an form.[code]....
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May 19, 2012
I am creating a simple email application which sends mail from a user's Gmail account, as I haven't worked out how to receive incoming mail yet.I have created a form (frmSignIn) which asks for the log-in info and another (frmComposeMessage) which has all text boxes necessary for composing an email (to, subject, message body).After clicking Sign In on the first form, it should hide it and open the second form, however I get this error:
System.InvalidOperationException was unhandled
Message=An error occurred creating the form. See Exception.InnerException for details. The error is: Object reference not set to an instance of an object.
[code].....
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Dec 5, 2011
I have form1 and form2 and have when a user clicks on an icon on form1 it shows form2 and hides form1. But how would I get it to when a user closes form2 it will show form1 again?
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Mar 8, 2012
I have 2 separate projects that i created using Visual Basic 2010. I need to have a Command button in project 1 to open a specific form that i have in my 2nd project.
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Nov 11, 2010
I have a program withmultiple Forms and i have made a back and Forward Button so they caneasilgo back to the previous Form.My question is How do you open a random Form with a string i have googled it nd this code is the best one i have found.
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Jul 17, 2003
How to create an instance of a form if it is not know in advance which formtype has to be opened. If you want to skip the chitchat: the .NET code example is at the end of this post. First the Symantec: when we create a new form, this form has a name. If we refer to that name, we actually refer to the name of the type of object that is just created. When to use of course when reading the subject you might think: why not just pass the form to a parameter that takes a form (or control/object)?
The answer is: you don't when it is not sure, when or if a new instance of the object has to be created or, as mentioned, when the procedure is called it is not known which class has to be created. You could of course hold a bunch of created objects, but that would be a shameless misuse of memory. Imagine the following scenario (seen something like this in a post, but can't find it anymore):
You have a class that is able to trap an event, say the doubleclick of a textbox, and has to open a form when it occurs. If it's always the same form, that's easy, but what if you want it to be determined during runtime? This is a quite common story: doubleclick on article opens the detail form of that article, doubleclick on supllier opens that particular form. If you use a form variable, how do you say to the class which form should be opened? This will not work
Code:
Dim FormToOpen as Form 'you don't want to open it right away, you want to know when the time comes what form to openFormToOpen = Form1You could say FormToOpen = new Form1, but then 1. an instance would be immediately created, even if it never will be used: memory leak. 2. you can never close the form, you'll always have to use the same instance created when setting the form. Consequently, you can never open more than 1 instance using this way.
The solution: use the type. If you know the type, the Activator class will enable you to open (and return) an instance of that form at any time and as much times as you like. (The Activotor class exposes the function CreateInstance which returns an instance of the specified object)The following code creates an instance of the type form1 and shows it.
Code:
CType(Activator.CreateInstance(GetType(Form1)), Form).Show()Or for better readability, the same code split up:
Code:
Dim FormToOpen As Type
FormToOpen = GetType(Form1)
Dim frm As Form = CType(Activator.CreateInstance(FormToOpen), Form)
frm.Show()
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Nov 24, 2009
I'm trying to create a new screen in the same form, the only thing I've done closest to doing that is when you click on a button in one form, another form opens. But I'd like this action to be presented in the same window. So I guess I want to open multiple forms in the same window.
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Nov 13, 2010
i want to open progream in my Form,like:(The picture edited in Photoshop)
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Jul 19, 2011
Just as the title says there is a way to have the same 'Windows Form' to open two times ?
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Nov 10, 2009
I'm making a program where the user can choose a question section and the program is supposed to randomly open one of a few forms that contain questions. However, I can't get the code right.
[code...]
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Aug 19, 2011
I need to send this to my other admins on my forums so they have access to editing my website andeverything when they need to, but I don't know how to make it distributable (or
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Jan 16, 2009
Okay, so I was making a program, and I wanted to open a new form, and close the current one.Natuarlly, I did this.
If login = True Then
MsgBox("Logged in.")
Me.Close()
[code].....
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Sep 16, 2010
I have 3 forms, say Form1, Form2, Form3. Form1 has a public method assigning an image to a picture box:
[code]...
The problem is that this code is Opening a new second instance of the first form (Form1), when I see in debug mode and move my cursor over the frmPers variable, It's value is Nothing, altough I am seen it at the screen ¿Why is this? I am loosing my hair after three days trying several forms to do it without any results.
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May 15, 2009
I have created a main form in my program to which I have added a combo box containing 12 months of the year. What I want is when the selected month is changed it should call a subroutine which does a calculation. The procedure works but the combo box acts as if the selected item has been changed as the form is opening which is not what I want as at that time there is no data loaded for the procedure to do it's calculation. So what I want to know is, is there some way to prevent the combo box from behaving this way at start up?
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