Row's RowState Being Set To Modified After RejectChanges() Called?
Feb 23, 2011
I'm having an issue with a DataGridView object. This read-only grid is bound to a table and when a selection on the grid is made, other fields on the form get filled in with that row's data so the user can edit the row. When the user clicks another row, the current row's changes are saved back to the Table, making the row's RowState as modified.
The issue I'm having is an undo button I made. It just calls RejectChanges() on the row the user has selected. If I check the RowState after the button's click event function ends, the RowState is "Unchanged". However, if I click on another row, I notice that the RowState of the row I called RejectChanges() on gets changed back to Modified before the grid's SelectionChanged event is called, which is where I have the block of code that would store changes made to a row. If I go and check the data of that row, none of it has changed, so I'm quite confused as to what's making the row's RowState become Modified.
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Dec 16, 2010
From what I've read in the documentation, both of these methods roll the state of the datarow back to where it was the last time AcceptChanges was called. So what is the difference between them? Am I wrong about that?
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Mar 10, 2010
i getchanges from dataSet
when i am iterating through the rows I would like to check rowstate to see if row was added or modified. It says I cant check through an instance and the expression will be ignored..
Dim changes As New DataSet
changes = dsRates.GetChanges()
Dim count As Integer = 1
[Code].....
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Nov 4, 2010
In RowCreated of the GridView i add following script to select a row:
Select Case e.Row.RowType
Case DataControlRowType.DataRow
e.Row.Attributes("onclick") = Me.Page.ClientScript.GetPostBackClientHyperlink(Me.MainGrid, "Select$" & e.Row.RowIndex)
End Select
This works like a charm(i thought).But when i debug the SelectedIndexChanging and the following SelectedIndexChanged events, i observe that the RowState of the selected Row switches from normal{0}/alternate{1} to 3 instead of selected{2}. This occurs between SelectedIndexChanging and SelectedIndexChanged. Why does this happen? The next time i programmatically set the selectedIndex(f.e. after a new row was created), i have two rows that are selected and no (un-hacky) way to deselect the old in RowDataBound, because of the invalid RowState of 3(should only be 0,1,2,4 or 8).
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May 2, 2009
I've got lots of textboxes bound to a Dataset. When I make changes to a textbox with the mouse/keyboard the rowstate becomes changed - and when I do the .EndEdit and update the row it goes to the DB.
I've got some textboxes that get changed in code. When this happens the rowstate remains UNCHANGED. Updates to the DB never occur.If the textbox is changed in code and I also change another textbox in the UI then both changes make it to the DB.
I've verified that the "in-code" changed field in the dataset is actually changed - but the ROWSTATE is still printing as UNCHANGED.Here I'm showing that field 29 has changed to "blank" - but the RowState still is UNCHANGED. Why would changes to the .Text property of a bound control does programatically not change the row state?
Seems a google for this does uncover issues like this - but nothing that's helped me fix it so far - here's one link I can't make sense of[URL]..
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May 25, 2009
I want to compare differences between two tables in my database with identical schemas.
vb.net
DataTable1.Merge(DataTable2)
Dim changedRows As DataTable = DataTable1.GetChanges
'changedRows is always Nothing. Why???
The DataTable1 is updated with rows from DataTable2 correctly. i.e. missing rows are added and datarows that don't match are updated. But the RowState of each row is still unchanged. I need to have the rowstate (added/modified/deleted) so that I can update the database table.
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Feb 9, 2011
i was wondering if it possible to have a condition where lets say you have a column in the datatable called amount and a textbox acting as the filter called say maxamount to set it so the rowfilter when filtering the table will sum the number in the amount column until the number in maxamount is met, then stop and only return the rows where the total sum of the amount column is equal or less than the maxamount value, so i guess if the next row takes us over the maxamount it discards this row and returns the rows previous to it. is this possible using datagridview rowfilter or should i be loooking elsewhere to achieve this?
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Jun 5, 2011
I have an sql table called Stock with two fields called StockID and StockCode. I want the user to select the stockcode from a combo which in turn populates the stockid for that item into a lable on my form. I have already populated the stockcode into the combo but dont know how to compelte the rest.
Imports System.Data.SqlClient
Public Class cbo2
Private Sub cbo2_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
[CODE]...
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Aug 11, 2009
I have a form called FrmPracDetails which is built up with a List view called LvwColProc. Therefore when you click a field on the LvwColProc it takes you to another form called FrmColProcessing, here you can make changes to certain fields which are also present on FrmPracDetails. What I want to do is when you make changes on FrmColProcesing and Click the Save Button (which calls the Save function)the changes appear instantly on FrmPracDetails. Please note, FrmColProcessing will always be open next to FrmPracDetails. I have tried to put this code in the Save function present in FrmCol Processing as shown below, but it doesnt Refresh FrmPracDetails form. [code]
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Apr 2, 2012
I have the following line of code in my program:
JCL_History.Enqueue(JCL_History(I))
This JCL_History object is basically a Generic.List encapsulated in a wrapper and has the following method:
Public Sub Enqueue(ByRef value As String)
If Members.Contains(value) Then
Me.RemoveAt(Members.IndexOf(value))
[Code].....
In my testing I have 2 items in this JCL_History list. When I call that first line of code I posted (the one that invokes Enqueue) with I = 1 I expect the first item to be shuffled to the bottom and the second item to be shuffled to the top.
After the thread returns from Enqueue I notice that this is exactly what happens to my list, HOWEVER if I hit the "step_in" button after the execution of Enqueue I go into the Default Property's set method where Index = 1 and value = and it screws everything up, because the item that got shuffled to the end (index 1) gets overwritten by the item value shuffled to the top.
So basically the set method on the default property is getting called at what I think to be a completely ridiculous time. What gives? By the way I'm running VS2005 on XP.
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Nov 22, 2009
I have a modified button control with a string array in it. I am having trouble sending the string array to the form with the modified button on it. Anyone know what i can do? The form uses a arrayList to hold the buttons since they are made at runtime.
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Apr 11, 2012
Can you look at my coding and let me know what I'm missing or doing wrong?I have a SSRS report that is called from a ReportViewer control and the ProcessingMode for this control is Remote. The report also has 1 parameter in it's DataSet.In the code I placed a MsgBox to make sure the code is finding the parameter and returning the parameter name. I am trying to stick the value of 10 into the parameter for playerID 10. Data for this player does exist.
I believe I need to add some more code to make this work but I'm not sure what else to add.
When the code executes the report is displayed but no data is shown in the report.
[Code]...
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May 13, 2010
I recently found an awesome tool called "Freemind" that is called a 'mind mapping' program. It's similar to MS Visio but way cooler and more automated.I reeeallly would like to integrate this into a VB.net Form, but how?
Has anyone seen or heard of mind mapping inside VB.net before? Are there programs out there already that work with VB.net or anyone have an example they have seen / built that works?
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Feb 26, 2007
My code Adds a New Row from a Source Table called "objTablaOrigen" To a final table called "objTablaDestino". This tables are passed ByRef because they come from a DataSet respectively. objRowNuevo is The Row that will be added to "objTablaDestino" The data from "objRow" is well copied to the "objRowNuevo" (that is the new Row with type of objTablaDestino).
'The problem occurs when the instruction Add is executed. ¿What happens? The new row is added as well, but this generates an Exception with the next message:
[Code]...
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May 21, 2011
VB express.yesterday my computer started squawking about the project that I was running in debug being edited outside of the editor, and did I want to reload.The message box gave me four choices: Yes, Yes to All,No,and No to All.It started doing it when I had a new project with nothing but a multiline text box that I was trying to use to display the numbers in a for next loop there was practically nothing there that I did.It squawked about that for projects that I ran many times before, and haven't edited at all recently.It kept coming back repeatedly.So far as I know, I have edited nothing outside the editor.What would I be reloading?
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Aug 15, 2010
Although X,Y value are added, the location didn't change in the printing.
For Each line In _sigData.Lines
f Not line Is Nothing Then
For Each pt As Point In line
[code]....
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Sep 8, 2010
I have a number of files in a folder, I need to get the last modified date. So I used FDate = IO.File.GetLastWriteTime(FName) Works fine with some files, but on others, I get a date of 1/1/1601. But when I check the files in Windows Explorer, all the dates look normal (recent). So, I'm gessing there are multiple files dates stored in the file system, and the ones dotnet is seeing are not the ones windows is seeing. How can I get exactly the date which appears as "date modified" in a file explorer window? I tried some vb6 api stuff but that doesn't seem to work in dotnet.
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Jan 15, 2009
scenario:
-folder x resides on server a, server b ,server c
-x contains same set of files in a,b,c
whenever any file gets modified in a, it should get also modified in b and c as well
similarly b->a,c and c->a,b
my idea of implementation is -when ever any file is modified on a server, compare timestamps and force copy the modified in the other two How should i go for implementing it?
1)how to check if a file is modified
2)how often this check should be done and how this should be implemented should a service be running to perform thi check i want to do this using .NET?
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Sep 23, 2010
I have several textboxes trough which i add data in the database. after clicking the save button the data is added to teh database. and if i click again on the ssave button without changing the content of the texbox it adds the same data to the database. i have tryied using textbox.modified but it only works for blank textboxes. how could i prevent from adding the same data?
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Jan 24, 2011
I am wondering if there is an easy way to only copy new and modified files. Here is the code I am using to copy files with:
[Imports System.IO
Public Class Form1
Private Sub CopyButton_Click(ByVal sender As Object, ByVal e As System.EventArgs)
[Code].....
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Apr 5, 2009
how I can display the date a file was last modified on a web form. I'm working in C#. I was able to do this in classic ASP with the following code, which I had in an include file:
dim bs, b
set bs=Server.CreateObject("Scripting.FileSystemObject")
set b=bs.GetFile(Server.MapPath("/directory/schedule.asp"))
[Code]....
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Aug 20, 2011
I am working on a vb.net project which is concern about the computer file forensic. Thing is i wish know is there any idea how do we know a file was modified and which part of the content was modified. For example, a file was consist of number of bytes which could be translate in string with HexEditor (* FF D8 00 EF.....). If someone was modified certain hex number from the file like (* 00 00 00 EF....)How do we know those hex numbers was modified? Any .NET class function can peform the action like that? Or is there any idea to do that?
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Dec 7, 2009
Does anyone know how to retrieve the html source code of the webbrowser control after it has been modified.Specifically what I've been doing is this[code]...
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Mar 29, 2010
I would like to get the DateTime that a web age has last been modified. The HttpWebResponse class with the LastModified property appears to do something like that, but I am not sure if it returns the DateTime the page was last modified, the DateTime that it last returned a page to you, or something else.
How can you get the DateTime that a web page URL was last modified?
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Aug 10, 2009
am working on this chat app for a client and i have got most of it working with but i have hit a snag when the user clicks the SEND PM button it does what it is suposed to sends the username to the client and then opens the pm window but when it then freezes when it loads the form
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May 8, 2012
I have a class contains read only property returns an arraylist, i don't want that arraylist modified from outside the class[code]...
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Feb 10, 2012
i have a problem in my project to find the Last Modified date of a site..
is any code to find that in asp.net
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Dec 23, 2011
I get that error any time my form closes(Me.Close), even if I don't do anything to the form at all exept load another form like this: Form2.Show Me.Close().
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Jun 3, 2010
OK... I'm using Image Magick to go through files and create in effect thumbnail version of each of them into another folder.Now, I don't want to convert files if they've already been done, so I'm wondering if I can compare the Modified and Created dates of the original and thumbnail, and only convert if the source files Modified or Created is more recent?Is this a safe approach? Note: I've got the archive flag method working, but using the dates seems safer!?
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Apr 3, 2012
I have an Inherited Control with a Property that can be set in the designer. There's some code in the Set procedure to make sure it's set appropriately. However when I build or run the project that property is changed, I am assuming it's the sanity check code in the Set procedure that's causing it to be changed along with some VS beahviour. Here's the code:
[Code]...
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