Undo Users DataGridView Edit If SQLDataAdapter Update Fails
Dec 29, 2011
I Fill a DataTable using a SQLDataAdapter then use a BindingSource as my DataGridViews DataSource. My DataGridView contains a ComboBoxColumn named "Status". There are two ways to update the Status column. One, the user can change the value by clicking a cell in the column then the combobox appears and they make their selection. Second, the user can click a button on the form and the Status for all the visible rows are changed to "Exported". I use a stored procedure as my adapters Update command.
[Code]...
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Aug 17, 2009
I have a DataGridView bound to a non-SQL Server database. I need to allow users to edit existing records but under certain circumstances I need to intercept the edit and instead of committing and updating the dataset I need to delete the edited record and re-add it as a new record. I have tried using every event I can think of to do this but haven't managed to get it right.
The closest I have got is with this:
Dim theRow As DataGridViewRow
Private loading As Boolean = True
Private rowLeft As Boolean = False
Private WithEvents cm As CurrencyManager
Dim copiedRow0 As String
[Code] .....
This almost works but sometimes completely messes up and re-adds rows twice and all kinds of other bad side effects. It seems a really simple thing to want to do but I just can't get it working.
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Feb 13, 2011
I am beginning to work with .NET technology after several years of VB6 and C++ and I want to learn as fast as possible.
My problem is with a DGV. It shows the prices of several store items, and I intend to let the user modify those prices by entering a % in a textbox (radio button states if that % is positive or negative) or by editing cell by cell manually.
As editing prices is kind of sensitive, what I do is loop through the DGV, add or substract the % engtered in the corresponding column and ask for a confirmation after whole DGV loop is done. If user agrees, DB is updated with new values. No problem here.
If user denies (in case he/she made a mistake), I restore grid's DataSource to a copy I made before calculating new percentages and this automatically refreshes my grid to its original state.
The issue is that if a user denies the operation for a 2nd time, this 2nd execution of the code fails at showing the original values, disabling the pseudo-rollback function.
Here is the code:
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If MessageBox.Show(mensaje, "Actualizo", MessageBoxButtons.YesNo, MessageBoxIcon.Warning) = DialogResult.Yes Then
[Code]...
remember this works OK if user denis once. What am I missing regarding DataSources or its Tables? Is there anything like .Redraw?
Btw, I tried update, refresh and I also used a sleep function (this helped me a few times back in VB6...).
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Jan 13, 2010
How can I add, edit, + update my dataset (I created in code) which is bound to my dgv through user input in the dgv?
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Sep 18, 2009
I am working in VB.NET windows forms and dealing with DataGridView.I have populated that DataGridView with the DataSet through wizard. How to Add , Delete and Edit/Update the records of the DATAGridview back to the DataBase..I am using MS Access as the Database....I am using Windows Forms application not the WEB application...
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Oct 26, 2009
When i tried with the code discussed in this forum i am able to add records but not modify any particular existing record.
[Code].....
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Jun 29, 2011
I am porting VB.Net 2 code (VS 2005) to VB.Net 4 (VS 2010). So far things have been going relatively smooth. However, in testing my new ported code, I came across a strange behavior. In VS 2005 (.Net 2), I have a DataTable filled with data. I then use a DataAdapter to send updates back to the SQL Server. When I perform the qlClient.SqlDataAdapter.Update() command, it execute in roughly 4 seconds. The same code,on the same table in VS 2010 (.Net 4) runs in 1 Minute 17 Seconds. This is completely unacceptable. However, I have no clue as to why it is happening. The .Update() method is an internal command, not one that I modified in any way. It does not error out, it's just painfully slow.
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Dec 17, 2009
I am using vb2008 express edition and SQL Server 2000What I am trying to do is programmically populate a dataset with records from a database and then bind the fields to textbox controls so that and changes will be updated in the dataset and eventually the database.I have managed to get as far as displaying the data in a form, but cannot understand how to update the database when a button is clicked.
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Mar 9, 2011
I'm still in my novice stages of .net development, and I think I may be trying to make something too complicated.In VB.Net 2008, I'm using a SQLDataAdapter to Fill a dataset with records being returned from a Stored Procedure (SQL Server 2005).I'm using that dataset as the datasource for a gridview. Up to this point, everything is great and I understand what's happening.I'm getting ready to make my first-ever attempt at updating the data in thegridview and then pushing the updates back to the SQL dB.Here's where I'mgettingconfused...to cut to the chase, what's the simplest way to load the updates back into SQLServer?
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Apr 15, 2009
I wonder if it is possible to undo a transaction(delete/edit) that has been done? For example, when I delete a row in my datagridview,
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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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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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Mar 21, 2011
In one sequence i want to update 4 tables.if one update fails i want to roll back all updations.Data should be in starting state.how i can do that in vb.net
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Sep 12, 2011
I am adding an undo feature for a DataGridView using the Command Design Pattern. To create the EditCommand, I have to know what was the previous value of the cell, so I can re-enter it in case the user hits undo. I'm doing it using the CellBeginEdit and CellEndEdit events. With the CellBeginEdit, I save the value of the cell in a private variable and at the CellEndEdit function, I use the saved value to create the EditCommand. It's working fine, but I wonder if there is a more saner way to do it. Maybe a event that holds together the previous and the new cell value. Bonus points if I could actually prevent the DataGridView from updating itself and let the EditCommand do it.
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Aug 17, 2009
I have a DataGridView bound to a non-SQL Server database.I need to allow users to edit existing records but under certain circumstances I need to intercept the edit and instead of committing and updating the dataset I need to delete the edited record and re-add it as a new record.I have tried using every event I can think of to do this but haven't managed to get it right. [code] This almost works but sometimes completely messes up and re-adds rows twice and all kinds of other bad side effects.
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Jan 3, 2012
I have written a program and everything works fine, but I want to make sure that only the administrator can add or edit users to the system. As I see it, I need to add an argument (if statement) to my login button code to disable the add / edit users button on the main form if the user is not Administrator. [Code] I have tried putting my If statement in but it doesn't happen the button is still active even when I login as admin.
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Aug 18, 2010
Very simple update. It simply fails, no error, no change gets made to the database.Dim db As New BarClassesDataContext Dim foo = (From a In db.articles Where a.id = 14 Select a).Single Response.Write("<h3>" & foo.title & "</h3>") foo.title = "This is my new, updated title for article ID #14"
db.SubmitChanges()
Here is the relevent portion of my article class. Also, this is a web form so I have no console. Is there another way to view the T-SQL output?
<Table(Name:="dbo.article")> _
Partial Public Class article
Private _id As Integer
Private _issueid As Integer
Private _dateadded As Date
[Code]...
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Jun 8, 2009
I have made a small form where I have bound textbox with records from database.Although my code for inserting and updating the record seems fine and working. But when I view the database, tables i see no inserts/updates made there. But When I run my application again, I see the records in the bound textbox but only for some seconds (for around 1 and half minutes), although they are not shown in the database (tables) actually.
When I close the application and run again it after 1-2 minutes there are no more records bound to the textbox, since no records at all.How can this be possible. I don't have any idea what's going on.
I have been using visual studio 2008 and sql server.Code I have been using for ::
'Update the Records Private Sub btnUpdate_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnUpdate.Click
[Code]...
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Oct 14, 2010
I need your support here. I have one dataset with numerous table adapters in one project. All fine. Now, in another project I am referencing the same dataset. I have added it as a link.So far so good. However, when I change a tableadapter in my main project store and close, and then open my other project the changes to the tableadapter are not there. For example, I have been adding an additional field to an adapter. But when running the second project that field is not part of the tableadapter.
After investigating a bit, I can say that, for whatever reason, when I link the datasets XSD file it created a copy of the respective Designer File. There is now a link to FundResultContainer.designer.vb, as a child of FundResultContainer.vb. But there is also a FundResultContainer1.Designer.vb as a child of FundResultContainer.xsd.
Like this:
FundResultContainer.xsd - FundResultContainer.vb -- FundResultContainer.designer.vb - FundResultContainer.xsc - FundResultContainer.xss - FundResultContainer1.Designer.vb
This could be causing my problem. However, to clean it up, I have removed the whole tree (dataset) and linked only the XSD file again. IT does again create a second designer file, exactly as above.
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May 25, 2010
I have a little vb.net script that will copy a file, set its attributes to Normal, update the file time, and then set back the attributes to match those of the source file.
If IO.File.Exists(Destination) Then IO.File.SetAttributes(Destination, IO.FileAttributes.Normal)
IO.File.Copy(Source, Destination, True)
IO.File.SetAttributes(Destination, IO.FileAttributes.Normal)
[code]....
I however I'm encountering a quite strange problem. On some configurations, IO.File.SetLastWriteTimeUtc triggers an UnauthorizedAccess error, although the IO.File.Copy instruction worked very well.
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Jun 23, 2010
I used to have a single DataGridView (DGV) on a form. I formatted and populated this, then used DGV.Show to make it appear on my form. This worked fine.I upgraded my form, to included 2 DGVs. Within a sub I dim a new DGV, populate and format it as before then set this equal to whichever DGV on the form it's meant to be. For example:
Dim pDGV as new DataGridView
with pDGV
.ColumnHeadersVisible = True
[code].....
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Aug 15, 2011
I'm trying to allow users to update their details after logging in on an asp site using vb. Textboxes are populated with user details using session variables in the form_load. The textboxes should be editable but for some reason are not registering the changes when the submit button is clicked.
Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
Txt_Fname.Text = Session("First_Name")
Txt_LName.Text = Session("Last_Name")[code]..........
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May 28, 2011
I have a program which I am going to hopefully updating a lot in the future. Is there a way to automatically tell the users that there is a new update and then link them to the download page?
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May 23, 2011
Changing DataGridView BindingSource at Runtime Works but then Fails When Changed
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Mar 7, 2011
The VB format(object,formatString) command fails when placed in the handler routines of a DataGridView.In the following procedure the newCellValue returns the Format string value instead of a formatted cell value.This pproblem occurs in both the dgv_CellFormatting and the dgv_CellClick routines.The same commands work properly when placed in a procedure on the form.
Private Sub dgv_CellFormatting(ByVal sender As Object, ByVal e As System.Windows.Forms.DataGridViewCellFormattingEventArgs) Handles dgv.CellFormatting
If e.FormattingApplied = False And Not e.CellStyle.Format = Nothing Then[code]...........
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Mar 19, 2009
I have a trouble updating my records to SQL. I have a programme, It will save user entered records from spreadgrid to sql server using "do while, loop" method. Later it will load the saved record to the same spreadgrid for editing the records by programatically not using the inbuilt datasource method.the problem is how to update the old records with the newly added records programatically especially with "do while, loop" method. I hate the data adaptor method.[code]....
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Jun 21, 2010
Add, Delete, Edit and Update from the database using .NET?
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Jun 21, 2010
I have created simple database project, using vb.net, ado.net, oledb, datatable, datagridview.My program is working nice, I just need Help with how to add, delete, update and edit records.
[Code]...
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May 15, 2012
I m' trying to select a row and then edit, and no error on debuggiing but the changes are not saved on the database
[Code]....
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Dec 7, 2010
I am using following code to edit and update field in my databse table. But it does not cast any effect on database.
Dim drCurrent As DataRow
drCurrent = DbResultDataSet.tblResult.Rows(0)
MsgBox(drCurrent.Item("PaperID"))
drCurrent.BeginEdit()
drCurrent.Item("PaperID") = "433"
drCurrent.EndEdit()
TblResultTableAdapter.Update(DbResultDataSet.tblResult)
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