I have two tables with referential integrity defined in the sql-database. parent: projectschild: projectlineI do not want projects to be deleted if projectlines exist.The projects are displayed in a datagridview.Here's part of the
Dim dbs As New databasedata.databasedata
Dim connstring As String = dbs.DatabaseConnection
Private dc As New DB2Linq.db2linqDataContext(connstring)
[code].....
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.
I am trying to create an xml editor that read and write xml. my code reads the xml with no problem and allows me to create new rows but when I try to "write" it over I get the following error: "Token StartElement in state Epilog would result in an invalid XML document"
here is my xml:
<?xml version="1.0" standalone="yes"?>
<MacroList identifier="test">
[code].....
Can't Remove Row in datagrid on event RowValidating
View 6 RepliesI have the following code in which it supposed to remove rows that have the first column checkboxes checked, but it only removes one row at a time.If you have more than one checkbox checked, you have to click the command button each time to remove the row.It seems that the logic is correct to remove multiple rows if more than one checkbox is checked, but it doesn't work.
Public Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
For Each row As DataGridViewRow In DataGridView1.Rows
[code].....
I am having a problem with the cellvalidating event constantly firing when the datagrid is refreshed (since the trigger that fires the event is the originally selected cell losing focus).I would like to remove the event handler for this at certain points of my code so that it does not fire but the examples I have come across on MSDN don't appear to do anything, so I guess I must be doing something wrong.[code]
View 1 RepliesI'm trying to use a datagrid in my VB application. But I'm running into a problem. I keep getting this column, shown below highlighted in red, and I can't figure out how to get rid of it.
What property do I use to get rid of this column?
Further more, how can I create a context menu for when I right click on a grid row.
I'm tried to make a control that will kill itself when added to a form. Actually what I want to do is make a control that will ask for password before added to a form, and remove itself if the password is wrong... Anything work great, it really will remove itself from the parent form, but it will show a error message too: "'child' is not a child control of this parent."
Here the code:
Public Class SuicideCustomButton
Inherits Button
Protected Overrides Sub InitLayout()
[Code].....
I'm tried to make a control that will kill itself when added to a form.Actually what I want to do is make a control that will ask for password before added to a form, and remove itself if the password is wrong...
View 2 RepliesHow to Undo changes in a form?
View 7 RepliesI 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.
View 5 RepliesYes its me again with yet another problem Ok so I've now gotten round to trying to display some data from my database and displaying it in a DataGridView Heres the critical part
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I need to validate that a user doesn't leave the name field blank when they add a record in a datagrid. See code below that I wrote to accomplish this. It works fine if the code is under the 'saveitem' event. However, I want to check it each time a row has been entered (the user may add several records before clicking on the save button). I tried putting it under the 'Row Leave' event but apparently that event "fires" when you click the add button and throws up the error message immediately. I thought about doing it on 'cell' leave but then could not figure out how to determine which cell column you are leaving in order to check the appripriate field.[code]...
View 4 RepliesHow does the "Undo" operation work? Not looking for a specific code, I am just curious to how it works.
View 3 Repliesmy 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
View 1 RepliesI want to put undo in a small program
View 10 RepliesI'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.
View 3 RepliesI 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).
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
View 2 Repliesso 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?
I have a DataGrid as a child of a Customer Form based on a Query like this
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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.
View 2 RepliesI have a form with a FileListBox and 2 Button:... Button1 I would like To Undo my Last Action:...Button2 I would like to redo the Action, I have Been Looking For a code for These Buttons. In FileListBox I am Drilling Down through my files. So that Means if I double click on a file in FileListBox and I have gone to far I want the Undo Button (Button1) to show Previous Files that where shown).
View 6 Repliesi have created a flight booking application for my assignment. to complete it i need to create an undo button..
View 11 RepliesI am working on a Notepad like text editor and I'm trying to put an Undo function in it. When you click the undo menu, I want to simply undo the last action (added char, removed char, paste, delete...). It doesn't have do remember all the past actions, I just want it to undo the last action even if the last one was undo... For now I have a button in a tool strip menu (tsmAnnuler) and my richtextbox (rtbZoneTexte).
View 2 Repliesi am trying to make a really simple program to start with .It is for keeping score in a card game. The functionality of the program is 10 buttons(cards) that when you click them they dissapear and 4 buttons that when you click them they add or remove 1 point to two textboxs and one reset button that when you click it it resets everything.
I have done everything but now i want to make a undo button because when you missclick something it is really annoying you have to reset the whole thing and remember what exactly you had pressed before and this is not what i want. I googled a lot,i read a lot of threads here and in other forums but i mostly found web browsers undo buttons or i didnt understand what to do.
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]
View 21 RepliesI try to implement undo in drawing program I want to save the bitmap after every drawing and push it to stack then when the user click the button it will change the image to the last bitmap saved in the stack here is my code
Private Sub PictureBox1_MouseUp(ByVal sender As Object, ByVal e As System.Windows.Forms.MouseEventArgs) Handles PictureBox1.MouseUp
Xend = e.X
Yend = e.Y
[code]....
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.
View 9 RepliesAfter 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)?
View 19 Replies