Add Undo / Redo Feature To A Finished Database Application?
Mar 30, 2012
Just finished a database for stock management system in local terms and language. All according to their request and agreement. Now they need me to add undo/redo functionality to the application and I just dont know where to start. I am looking first for a general tip on where to begin:
I have one form, for e.g., that manages their stores. Then another for catagories...now they need the undo for all this things and am not sure if it is even possible cos datas are related.
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Apr 5, 2009
how to implement undo/redo in an application? I've searched the web, and most I found don't work properly or just clear the textbox.
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Mar 30, 2009
i want to implement undo/redo function in icon editor, im try to use arraylist or Stack to hold current icon or picturebox image when mouse up and left mouse is not press. i dont know exact place to put the Stack for push.
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May 5, 2008
i have written code for undo and redo operations code for undo operation
[Code]...
now when i rotate the picture then tries to undo the image then this erorr comes Stack is Empty and program closes.
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Jul 29, 2009
I understand that implementing an UnDo/ReDo function can be complex using Stack operation/XML serialization.
That is why I have started to search for commercial tools/components, but I could find such tools only for RealBasic, not for VB.net. Does anyone know where to get such tool/component, or has good example code to include various undoable operation into an Undo/Redo function, that means undo operation for datagrid and chart manipulation (similar to a spreadsheet application).
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Apr 20, 2009
i need this option for a textbox. the undo/redo in two separate buttons and it should be for multiple times not just once.[code]
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Mar 3, 2010
After a rtf. file is loaded in richtextbox....then the user highlights the text with different colors.How can I set both redo and undo button to backward and forward the steps(only the part of higtlighting)?
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Aug 18, 2009
I'm trying to setup undo/redo for changes to a datagridview, but am having a problem with capturing the cell value before it is changed. I am currently using the CellEnter event to capture the original value, which is fine if only one cell is affected. However, if the user selects multiple cells and goes to cut the data (Ctrl-X), CellEnter does not fire for each of the selected sells, only the ones moused over it seems. Is there a better way to capture each cell value before their CellValueChanged event fires?
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Sep 23, 2010
I am trying to build a simple syntax highlighter editor along with undo/redo feature. I have the code to syntax highlight the code on "TextChange" event but the undo/redo feature does not work.Any work arounds on implementing syntax highlighting with undo/redo?
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May 14, 2009
I have a problem with my code. After I click undo I can't draw on the image and I don't know why
This is my code
Imports System.Drawing.Graphics
Imports System.Drawing.Bitmap
Imports System.Drawing
Public Class FrmChild
[Code] .....
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Apr 30, 2012
I was wondering if there is a way to modify the limit on the number of undo/redo actions a RichTextBox is capable of performing. It seems as though the limit is around 100, and I really need to increase this because of the demands of my application. I have text formatting (Bold, Underline, etc.) in my application, and since you can change the font of the text, I need to loop through the characters in the SelectedText one-by-one and apply the correct formatting to them in order to prevent any errors from appearing. Every time a single character is formatted, it counts as an action. As you can imagine, this quickly adds up and therefore makes my undo/redo features not as useful as I'd hope with the 100-action limit. Does anyone have any suggestions for me?
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Apr 28, 2009
i am developing one eform designer project..the main object of this project is there a form in this controls are drag and drop.moving and deleting and editing the properties ..it's like a our .net designer how we drag and drop the controls ..so in my project i need to implement undo/Redo functionality..please give me the basic idea of this..(Please think like a our .net Designer (UNDO/REDO))
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Apr 4, 2011
basically add and remove text and selection information from a stack. Result: When using Undo/Redo the selection got messed up, the text moved, sometimes causing lag of epic proportions. I need a way of having complete and smooth undo/redo class for storing all information I would possible need.How to know whether or not to add an undo stack is easy, I just checked if the user clicked in the text or moved using the arrow keys. As soon a previous marking was given for "next text change needs to be backed up", it was backed up. At that point I stored the RTF and selection start/length. What do I have to store of a RichTextbox control to be able to restore it to a previous state, and how can I reset it back to a previous state? See it as having a "RichTextBoxState" class:
Public Class RichTextBoxState
Sub New(ByVal RTB As RichTextBox)
Me.text = RTB.RTF
Me.selectionstart = RTB.SelectionStart
[code]....
After restoring it must display the EXACT same thing as when it was saved as a state.
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Jun 15, 2011
After getting the code below from here, I would like to learn how I can easily copy/paste and undo/redo actions. The code below allows a person to "draw" on the image.
[Code]...
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Aug 6, 2009
I have created a Form, added a MenuStrip to it and inserted the standard Items. My question is that I know some of the options won't work like 'Save' and 'Save As' but how do you make ones like 'Open' 'Exit' 'Undo' and Redo' work when start debugging?
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Feb 21, 2010
I am currently using vb2008 express, I want to have a database inside the finished application. Not one that connects to an external database or any outside connections but one so all the data is readable, writable, deletable from within the application itself.
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Sep 16, 2009
When a button is clicked,my program gets the list of all Drives on a current computer.Then I use String.Concat to merge the drive letter and the rest of the path.So I get something like: "C:" + "somefoldersomefile.some_extension"That creates a full path to a file I am looking for.Then I check if that file exists.If it doesn't exist,I use Process.Start to run the setup file(to install the program I need).It works well and installs the program I need.I want my application,after the installation is finished,to check again if the program is installed and ofcourse confirm that it is.
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim DriveList As String() = Directory.GetLogicalDrives()
Dim Drive, FullPath, Path1 As String
Dim EmptyDrives As Integer
[code]....
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Dec 17, 2009
i'm working on a internet cache cleaner.. i load the cache files in a listbox and send them to the recycle bin. in this process, the app stalls until completion and the stall depends on how many files are in the cache.how can i do this and keep my app active, not stall?
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Jul 25, 2010
How can I stop my application quitting until a backgroundworker has finished? Its an updater, so basically I want the form to hide until the download is finished, and then exit.I've tried to make a setting to tell the app when it is still downloading, and on form closing check this variable, but it won't work. For some reason it still quits!The update window is in a separate form to the main form, so the user clicks 'Finish', the update form closes and the main form stays open.[code]
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Feb 2, 2010
I built a program in visual studio 2005 that access a Microsoft Access database. I need this program to be a standalone program on many machines. To do this, I need to install a copy of the database when the program installs. I tried including it in the application files part of the build, but the problem I am having is the connection strings dont update with the install. It still tries to point to the folder it is in on the comnputer i built the program.
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Jul 19, 2011
I have a do until loop. But whenever my program get's to it, it always locks the application so I can't click on anything until the loop is finished. How do I fix this? I want to be able to stop the loop with a stop button.
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Dec 18, 2006
I would like to build an application in vb.net which is some what similar to old net meeting and one of main feature I would like to implement is application sharing. I tried the netmeeting sdk provided by microsoft but it is very complicated (I'm new to vb.net and samples are in c++). developing this application or whether there is any third party sdks available for the same.
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Dec 17, 2011
I have recently finished a console application and deployed it to several computers on our network for testing. As it is just an EXE a copied to the hard drives of selected computers for now. When the app is launched it writes info to an sql DB so I always know which computers it is on.
During the past few weeks I have modified this app at least 6 times (improvements, adjustments, etc)
It is a paint to keep going back to the computers to update it with the new version, and getting mixed up which version i am on - LOL I am looking for advice on how I would go about doing this automatically, for example, it would be cool if I just had to put an updated file in a repositry and clients would use this to update.
In Visual Studio, when I view the properties of my application>assembly information - I can set a file version. Is it possible to extract this info and store it in a variable? I would like to dump the in my DB. Also I could then possibly compare the file version of the launched app against an updated file in a network share folder.
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Mar 26, 2012
I wanted to develop a tool in which i want to use words Macro Like feature.In an Application there will be front-end (i.e. form) which will accepts basic information like name,age,gender,Marital Status,Address,Locality,Contact number etc... In a backend i will be having few fix text fromate in the database as a string or BLOB.( instead of databaes, i can even keep words text template)
Now what i want to do is:when user submites the form data, my app should use this submitted data and replace all the marked location in text formate with the data provided by form. and once the complete text string is generated , i want to generate word file ( and/or Pdf) file from this.How can i acheive this with any one of this language .NET( web or Desktop ) , QML ,QT,Java ?( Text Fromates : because most of the containts of the text will be the same, only few words (fileds) will be diffrent for each copy generated)
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Dec 11, 2009
at work here we use a Remote Machine Viewer called FitNet which is proprietary to NCR and WalMart. However, I had no hand in developing this application and the developers no longer are emplyed here or did they assign anyone to take it over. I was asked to take a look at it and see if I could come up with something. The application is a .NET app but when I use .NET Reflector to get an idea aboutthe code it says no CLI header found.
[Code]...
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Apr 18, 2009
I'm trying to make an application which has a feature of an event calendar. I am quite familiar with the MonthCalendar tool in the toolbox, but that's not really what I'm looking for. I would like to make a calendar that somewhat resembles 'iCal' in Mac OS X. If any of you use Microsoft Groove Workspaces, the calendar in that is very close to what I'm thinking of. I want the user to be able to double click the day and add new events which will show the title of the events in that day on the calendar when the events are saved. Also i would like to have the user be able to make recurring events. Is this even possible with Visual Basic '08?
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Dec 21, 2009
I use ClickOnce Deployment on my application to get the update feature.But i really do not like the deployment and the setup Is their a way I can use the Visual Studio setup feature to make a msi package for my application but still have the update feature?
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Feb 10, 2011
I have a question about application settings.Is it possible to update application settings or are they read-only?
If I program an auto-login feature, am I able to store the login details and use it next time user logs in. Would them settings remain after application is closed and opened again?
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Jun 6, 2011
i have created a database application in visual studio 2010 running with visual basic code, the application works great but i want to add a search feature on the dataset bar in the application next to the add and save how do i go about it,
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Mar 7, 2010
I am trying to utilize the DATAbase Diagram designer feature of SQL Server 2005 Express Edition and I get the following messages:
1) This database does not have a valid dbo user or you don not have permissions to impersonate the dbo user, so database diagramming is not available. Do you want to make yourself the dbo of this database in order to use the database diagramming?
2) When I select YES I get the following notification: Could not obtain information about Windows NT group/user xxx/xxxxxx,
error code 0x54b
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