VS 2010 Cascade Forms - Large Ones In Back
Mar 11, 2012
I've got a collection of a type of form and multiple of these can be displayed on the screen independently at the same time and now I'm wanting to add the ability to cascade these forms, but these forms can all be re-sized so it'll be very rare when they are of the same or similar size. I would like to be able to cascade them based on their present size, so the largest for is in the back and the smallest is in front.
I also realize that a form could be wider than than another form but that other form is taller than the current one, in which case I would like the taller form to be considered the larger one (an arbitrary decision, I know). Here's the code I currently have that cascades them in the order they are in the collection, I just need to know how to re-order them based on their size.
[Code]...
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Nov 6, 2009
I have an MDI application where the child forms are set to sizeable, but when I hit the cascade option the forms are resized. Other than setting the forms to a fixed size is there any way round this?
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Apr 13, 2011
What's the simplest way to pass a variable back and forth between 2 forms?Let's say I have form1 and form2. Form2 has textbox2 and button2. When button2 is pressed I need the text in textbox2 to display in textbox1 on form1.
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Nov 10, 2011
I have a project now where I will have a large chunk of CSV text, like 60 lines or more, and need to pass that from the client to the server. I know it would be weird with GET, but how would I store the multiline text so that I could later split it up, etc at my application?
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Dec 29, 2010
If I have a large number of classes, each similar to the other in certain aspects (they all share a common base class, but each does things differently), and I need to create Windows forms for each to allow easy changing of their values through a GUI? Create one matching form for each object in VS' forms designer, Or Use code to create the forms dynamically at runtime.
#2 makes the most sense to me, because a lot of these objects will share very common features of the form, notably "Ok" and "Cancel" buttons. But one object might need to draw a textbox on the form while another might need to draw a combobox. Not to mention, if I want to put icons on the "Ok" and "Cancel" buttons, I'd have to do this for each copy of the form in designer, and that sounds like it could get out of hand quickly.But is drawing forms through code sane? VS' forms designer is pretty sophisticated and designed to make life easier. Am I wise to consider ignoring its functionality and diving into the trench warfare of forms design through code? Or are there examples of automating form creation based on an existing object's properties?
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Sep 3, 2009
Because there was no aswer in Windows Forms General general forum i decide to post the same question in here... is about cascading comboboxes in vb.net.. Could somebody give me a guideline how to stop previouses selections of dissapearing when another selection is madein a new row... [URL]
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Mar 20, 2010
I'm developing an app in VB.Net (Visual Studio Express 2008, on Windows Vista) that connects to an Access relational database. The database has 3 related tables (TextSections, LineItems, Cycles) that I'm loading into my dataset. I've set up two foreign key constraints and want all changes to cascade through the related records in the child tables. I cannot get the cascades to reflect through.
For example, when I delete the parent record, the children records remain (in the database - they are removed from the dataset). Also, when I modify the parent record (change the Description field for example), the change is not reflected in the dataset datatable that holds the children records - unless I go through and ReLoad all of the data from the database and re-Set the constraints. I have set the .AcceptChanges, .UpdateRule, and .DeleteRule to cascade, and have also set EnforceConstraints on the dataset. Why aren't the changes cascading through the children?
Below I've pasted (1) the Load Routines for my datatables TextSections (parent), LineItems (child), and Cycles (child of LineItems); (2) the method that creates the constraints in the dataset, and (3) The Save routine for TextSections.
Friend Sub LoadTSTable()
Dim key(1) As DataColumn
Dim newCol As New DataColumn
[code].....
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Dec 16, 2009
Just looking to keep application looking neat, One Form Parent / Child relation, set to cascade updates / and deletes. What I'm looking for is when the form loads the user enters some information for the parent (about 2 column out of 5), then I create a datarow with the information that I have. At this point before I actually send and update command, I would like to get the next scope identity for that datarow.
The reason is I also use that Identity as an Id number in this case a receipt number, and the user will enter detail data that is stored in the child, then calls the save function, this is when I intend to actually call the update to the database.
So the question is, Can I retrieve the scope identity for a datarow that only exist in the dataset without calling the update command and actually storing the data in the database? Or in my case creating my own auto index sub a better choice?
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Mar 17, 2009
I have a large financial application which I am migrating to VB.NETIt has two main components: charting and financial statements.I want to know if it is possible (and how) to create a main exe, and then two separate projects for the two components (as dll's?).
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Dec 27, 2009
I am currently helping to write a Visual Basics program that was originally writing with access.The Original Access program has been used and modified over the past 5 years, During that time the database has gotten pretty big.The problem I am having is If I add the entire database to my data sources it creates data tables for every Table and Stored procedure even when they are not currently used in the program resulting in a 20+ minute build time just to debug.I am currently only adding Tables and Stored Procedures as i need them, so its not that much of a problem now, but as I continue to work and add tables the build time is going to go back up, and Id hate to have to wait 20+ minutes to test a small tweak I made.
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Jul 20, 2009
I am pretty new on programing and for the past 2 days Iīve been trying to paint a table grid based on the selection made on 5 combo boxes. My problem is that I am trying to fill the combos based on the selections made on the other combos and really I am going insane. I have found a couple of examples that show how to do this using JavaScript but I donīt think this is the best solution. i would like to do this using a stored procedure which I think is more efficient. My db is on SQL 2000 and I am using asp for server script.At the moment all i have is this, which really doesn't do very much, all it does is composing the where clause so that whe i call the stored procedure if filters the results based on the combos, but ofcourse the combos are at the moment static: [code]
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Oct 12, 2011
I'm working on a project that involves localizing a large number of Windows Forms. We're dealing with layout using the TableLayoutPanel control, which works nicely. One area we're striking problems with is when we set the Form.Localizable property to True, we then end up having to manage one .resx file per form per language.
That would be fine if the .resx files only contained the Localized text, but it also contains a vast amount of layout data for the form. Is there a way to separate the localizable text elements from the control layout information, that continues to work in the visual studio IDE? I've noticed that I can modify my the form's designer file to look at another resource file, but when I use the form designer, these changes are deleted:
'Label1
Me.Label1.AutoSize = True
Me.Label1.Dock = System.Windows.Forms.DockStyle.Top
Me.Label1.Location = New System.Drawing.Point(3, 0)
Me.Label1.Name = "Label1"
Me.Label1.Size = New System.Drawing.Size(61, 13)
Me.Label1.TabIndex = 1
Me.Label1.Text = My.Resources.ResourceManager.GetString("Form1_Label1_Text")
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Jun 3, 2009
CAN ANYBODY GUIDE ME HOW TO USE CSS IN ASP.NET APPLICATIONS USING VB.NET.
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Apr 11, 2012
As quick solution to the user wanting to be able to open a particular form from any other form (in a large application with many forms, not an MDI app), I added KeyPreview to each form and corresponding KeyPress event so that said form will open (ShowDialog) upon pressing F12 from all these other forms.
Since this update has been in place, the user has been getting intermittent (maybe 2 or 3 within the course of a workday) but nasty errors such as "exception has been thrown by the target of an invocation" and the dreaded "out of memory". Is there reason to believe (off the top of your head) that the KeyPreview could be causing this?
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Nov 1, 2011
What I am trying to do is to instantly apply a filter to a large list of data such that the list is updated almost immediately regardless of the number of items in the list. I have this working using a listview right now but it is far from instant, a list of 5000 items takes over a minute to get through. What I do currently is to maintain a cache of my data that my listview entries are based on. When the user selects a filter I parse this data one item at a time and determine if each item should still be displayed in the listview, if not I remove it. The complexity of determining whether or not a data entry meets the filter requirements is O(1), but just getting through each element in a loop takes significant time, and so does updating the list view graphically at the end of the process.
I have considered using a datagridview instead, using a database connection. I have never done this before and my main question here is whether this would allow me to do what I have described. With the database I could form an SQL query to return only the items that meet the new filter requirements... but would the data in the form update immediately, or would there still be significant delay?
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Dec 21, 2010
I am just starting to get back into VB programming, and I'm looking for a more elegant solution to an application I'm developing for a production line.I have a series of labels with manufacturing steps. The background color of the steps needs to change to green as the process steps through. Right now it is working as it should, it just seems a little too much like brute force programming.
Right now I'm using a Select statement to change the color of EACH label. The first portion of the Select statement is below. With this method I have to do this same thing for each case.
[Code]...
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Nov 20, 2011
I have an MDI running as the parent. How can you stop the forms moving to the back when they are open if you click in the any part of the MDI area. Also I notice if I have more than one form open it creates form instances on my windows task bar?
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Jan 15, 2011
I am trying to find a way to show a large amount of data that spans across multiple forms and text boxes. I am making a somewhat summery of the input strings.
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May 3, 2011
I have a menustrip, in which i have put a BACK option so that the user can go back directly from where he came to the current form, as there are many form which leads to the that particular form.
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Oct 17, 2010
So here is the deal. I am making my own program for fun, and I have this road block. Basically I have a 'Parent Form' which we'll call 'frmMain' and I also have another form which we'll call 'frmSchedule' (work with me here)
[Code]...
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Apr 12, 2011
Im having trouble passing a value from one form back to another using a listbox... The user clicks a button in the main form to bring up an instance of another form (form2.show). In that form, the user then then selects a number 1-5 and then presses done:
[Code]...
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Jun 9, 2011
I want to write a program to do Markov chain, but my states are quite large. First of all I calculate all the transition probabilities and revenues for all states(1381860 total states), and store in a multidimensional array. Public RevArr(0 To 9, 0 To 750, 0 To 282) As Long
After that the iteration of markov chain should use these as inputs to calculate the steady-state probabilities. But when I try to run the main code I got this error.Exception of type 'System.OutOfMemoryException' was thrown.
The following is the declaration of second array I add just another dimension for storing all the iterations, but I get this error. Dim stateprob(IT + 1, 0 To 9, 0 To 750, 0 To 282) As single
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Jun 20, 2012
I am currently working on a program that has several buttons in it lined up. Each button goes to different applications (.exe programs). The program I am making is suppose to be a fullscreen program and won't let you see any of Windows when it's running.
Therefore I want to make a "back" button that always stays on top of any application and when I push it it will take me back to my WindowsForm (startpage of the program).I am also wondering if you can make it so all .exe programs only can run ONCE. So if I press one of the buttons saying "open notepad" I want it to work so it can't open Notepad once again making it two notepads open. Just go back to the first Notepad opened.
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Sep 24, 2010
I have a splash screen, the default from Visual studio. It loads up, is shown for a few seconds, then, when it disappears, the main form is loaded. Now here is the problem: the main form appears in the back, behind the windows explorer window I load the application from.
The weird thing is that this only happens on some computers, particularly Windows XP machines.I tried a lot of things like BringToFront() or TopMost = true in the on Load event of the form but nothing seems to change this.
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Nov 20, 2011
I have an MDI running as the parent. How can you stop the forms moving to the back when they are open if you click in the any part of the MDI area. Also I notice if I have more than one form open it creates form instances on my windows task bar?
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Jun 18, 2012
I need to write code to interpolate the values shown in the image below. By "interpolate" I mean that if you were given a value of [Code]. I have working in Excel but I can't figure out how to make it work in VB 2010. Should I set my data up as an array or as 6 lists? If the user inputs a certain number how do I code it to look for the next highest number and next lowest number?
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Jul 6, 2010
I have a series of large files (4GB) that when I delete takes a very long time. This only occurs on a USB drive that I have attached to my PC. If I do the same thing on the internal drive the files delete quickly. It is as if the files are being overwritten before being deleted. I am looking for some guidance or other approaches.
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Jan 9, 2012
I have a lookup table that contains a label that describes the data to be written back to my database. For example:Label = Manufacturing Repair Issue (This is what the user see's in my front-end windows app)Data = Mfg_Repair (What I want to save to the database when the user choses the label)
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May 22, 2012
I have spent way too much time trying to sort this little issue out. I have narrowed down the issue to the exact procedure that throws the error. Yes, I have used Google..
Try
Dim tempSource as String = Nothing
Console.WriteLine("Loading document...")
[code]....
I am loading a text file, that contains about 1100 lines, and each line is going to be processed with HTML Agility Pack. From what I can tell, when it runs "doc.loadhtml(richtextbox1)", it throws the error. I also have tried to load the file into a string, and load the string with "doc.loadhtml(thestring)". It doesn't make a difference, still errors.
Here are is a sample of how each line looks:
<Site Index="" Name="" Group="" PR="" />
<Site Index="" Name="" Group="" PR="" />
[code]....
I am using HTML Agility Pack, however the above is what is on every line, about 1100 lines! For testing, I have a smaller text file made of about 50 lines before I load up the 1100 line file ;) There aren't any HTML, HEAD, or BODY tags! They aren't needed for my parsing. I am using HTML Agility Pack because it is easy to parse elements with. I can grab each value easily from each line.
I am not sure if maybe the error is because it technically isn't HTML? Meaning since the loaded code doesn't have an HTML or BODY tag, that it errors? I wanted to get this question posted, and while I am waiting on some answers, I am going to parse the document another way. Just curious as to what the deal is and why HTML Agility Pack isn't working. More of a proof of concept then anything, for my own learning and knowledge.
Here is the error I get (btw the on the doc.load() line, is where it throws the exception):
Object reference not set to an instance of an object
Last Note: The routine is on a background thread. I have used multi-threading before, and have delegates created for deeper in the code.
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Feb 28, 2012
Some of my users are collecting data files this size and wish to load it in to my tool. Is there a way to load large files of string data w/o getting a OutOfMemoryException? I have tried many different storage methods (Array, List, etc) but always without success.Before anyone asks 'why load it all at once', let me say the nature of my app is speed critical and it must be so.
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