Increase RichTextBox Undo / Redo Limit
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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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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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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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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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 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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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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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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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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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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Jul 28, 2009
I'm try to use the richtextbox undo method but when i use it the whole string is been deleted and not the last character
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Sep 8, 2010
I need help with my app. My app is retrieving data from the webBrowser and putting them into individual lines in the richtextbox. My problem is, if the retrieved string is too long then it takes more than 1 line in a richtextbox.
[Code]...
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Mar 11, 2010
I have a big issue which I have been struggling with for days now. I have a richtextbox where users Can input text and print it.
My problem is that i don't want to allow more than one page to be printed so i need to prevent the users in inputting more text than what fits to one page.
I have word wrap set to True which means that i really can't count the lines since they are determined by number of return/enter hits. I can't set the character to a max because blank Lines and spaces Can cause this to differ very much.
What i really need i a way to prevent the users in inserting more text than would fit inside the richtextbox frame and the frame may not be resizeble.
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Feb 16, 2009
I'm trying to code an 'increase' button to prompt a user to input a rate by which to increase select prices in an array.It should request the increased rate, then request a number from one to five, representing which price in the array to increase.Then, if 'increase' button is selected again and another number from one to five is chosen, then that element should be increased.It's working, but all the numbers in the array are changed. And, when I hit the increase button again, the array is repopulated below the first price increases instead of only replacing the designated price.
'declare 5 element array of prices
Dim prices() As Double = {12.2, 8.5, 12, 50, 2.4}
Dim rateIncrease As Decimal
Dim isConverted As Boolean
[code].....
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Feb 25, 2010
I have added a Split container onto my Form and within bottom Panel I have added a list box.How can I increase the size of the list box as I increase the size of the panel?
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Nov 19, 2011
If my if is not correct, and it goes in the 'then', how is it possible to redo my whole sub? I want to automate a whole sub.
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Jun 7, 2012
how might I redo this method with Activator.CreateInstance
Public Overridable Function setCreditType() As CreditType
Select Case creditTypeId
Case Is = 0
Return New NewCredit(Me)
Case Is = 1
[Code]...
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Jan 15, 2010
How to Undo changes in a form?
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Nov 8, 2010
I am working with a registry watcher but I can't block changes. I found this link [URL] but unfortunately one of the links posted was broken maybe because it was posted years ago. I tried searching for "undo file changes" on VB.NET using search engines but I can't find any.I am using VS2008 Express ed.
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Mar 12, 2012
How does the "Undo" operation work? Not looking for a specific code, I am just curious to how it works.
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Jun 22, 2010
my concern is tht i have a application with mail for my intranet users. Now I wld like to rollback or undo my sent message within a short interval say bfore a minute , i can or should undo . But im confused where to start from .....i need u guyz to just show me the correct way , i will try and do it by ma self
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Jan 21, 2010
I want to put undo in a small program
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Oct 2, 2010
I'm implementing multi-level undo/redo via a pair of stacks. This works well, but I'd like to limit the number of undo actions (actually objects representing the state of the application) . Once the limit of actions in the stack has been reached, I want to keep adding actions to the stack, but get rid of the oldest (bottom) items as I go.
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Nov 23, 2009
so i have 5 buttons and 5 labels.
when i press button 1 a "1" appears on label1.
now if i press button 1 three times, button 2 one time, button 5 four times, but the last press was wrong so i need to undo. i create a new button named undo, what would the code be for taking away like i said, not just for button5, for every button i set out but the undo button?
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Jan 29, 2012
Has any one experienced this. Never seen it before. Anchoring a Toolstrip Left,Top,Right will resize the strip with out the option of stepping back and undoing it. Forces rolling back the application. Toolstrip is docked at the bottom.
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