VS 2008 Data Adapter RowState Remaining Unchanged?
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 22, 2010
I have a very large table, and I have a sql data adapter to fill a data table. The user is able to change some values, then saves the changes, at this point i just call the adapter update method (I use the sql command builder to get all the commands of the adapter). What I need it's to make some changes to 4 parameters in the update command, before calling the update command, but I don't see how to do this? Before the update itself, I don't have any values, if I set the parameters (I saw the number of the parameters in the debug mode), before the update, that doesn't do anything, I think they get override in the update method...
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May 28, 2010
I have a datagridview bound to a datatable via a dataview. The user is allowed to edit cells in the datagridview, thereby editing cells in the datatable. I recently found that if the user editted a cell, then closed the form without ever clicking on a different cell (thereby causing the current cell to commit), the change was vanishing because the editted contents of the cell were not being saved back to the datatable.
This was only happening if the user closed the form. Clicking on any other control on the form also caused the cell changes to commit. After rooting abut in the DGV properties, it appeared that all I needed to do is add the following code to the Form Closing event handler:
If Me.dgvCurrentRedds.IsCurrentCellDirty Then
Me.dgvCurrentRedds.CommitEdit(DataGridViewDataErrorContexts.Commit)
End If
Sure enough, this caused the change to be registered in the underlying datatable. However, it was then getting obliterated by a different process, so I went looking for the source of that problem, and eventually tracked it down to this:
While the preceding code is causing the datatable to receive the new information, the datarow that has been changed still has the status Unchanged, even though it should have the status Modified since it actually has been modified. The fact that it appears unchanged causes some other code to obliterate the change, but that's irrelevant.
The question is, why is the row status UnChanged when it certainly has been Changed, and is there any sound way to force the row status to update?
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Aug 22, 2010
Only my local dataset updates when adding, deleting or editing records.The Source Database is supposed to update on issuing DataAdapter. Update(dataset )However, when I check my source database after running the operations it remains the same as the original.
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Jan 20, 2011
How to uncheck the remaining menu items while one of them was selected.Is there any built in property to set for that or i need to write code(uncheck the remaining menu items in menuitemclick event).
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Nov 9, 2009
when i try to insert data from database into dataset using data adapter, it takes long time, i want to use hourglass but i'm confused how or when i type the code so user will know that application still work.
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Dec 5, 2011
i am trying to join 2 tables together and display them in a list view. i have this code so far
[Code]....
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Oct 6, 2010
I have a windows form program that pulls data from a sql server. That same data is being read from a ASP.NET website that sets properties for the site. The SQL server has 3 tables: tblWebPage, tblObjects, tblProperties. and 6 views for the 6 web page: vWebPage01, vWebPage02, vWebPage03..ect. When the program loads you see buttons for each web page on the site. When the user clicks on the Home Page it loads this data: [code]Now, the problem lies in updating vWebPage02, vWebPage03, ect.. I assume with the same data I can copy my form with the code and change the form name and the data set to build and update. So that's just what I did changed the form name where needed and changed "vWebPage01" to "vWebPage02".When I tested the program My "vWebPage01" form it built and updated no problem. when I went to test "vWebPage02" it built the dataset and table adapter fine but it did not update at all.
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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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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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Feb 26, 2009
Getting data from csv. Works fine and has done for ages. Problem is when data is in the form of 'SS01' up to SS09. datatable shows as 1.000 for SS01...Any other data is read fine.
Dim Conn As System.Data.Odbc.OdbcConnection
Dim da As System.Data.Odbc.OdbcDataAdapter
Dim strConnstr As String
[code]....
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Jan 18, 2009
Does this work the way I think it should?
Private _adapter As New SqlDataAdapter("Select CaseId, CaseNum, DateLoaded, Status1, DateDiff(mm,DateLoaded,GetDate()) as mm From Case_T" _
& ";Select CF.CaseId, CFV.VendorId, CFV.DueDate From CaseFileVendor_T CFV Left Join CaseFile_T CF on CF.FileId=CFV.FileId" _[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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Aug 12, 2010
i'm using vb 2008 and local database sql server compact 3.5 to build a application.the problem is that i can't insert a new data to the database from the app. i'm wrote the query right at dataset and using table adapter. but when i call the query, it succeed but the data don't exist at database.why when i add data, it's not working. actually when i run it, it says that adding process is success, no error, and it shows at the datagrid. but when i look at database. the data that i add is not there.and in tableadapter, i also make sortData, seachData query, i can use both of them perfectly when i run the app.so, i really confuse why is the insert query didn't work.
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Jun 22, 2011
I'm confused with this piece of code listed below. This code calls the update method of the dataadapter object to save the changes made to the dataSETback to the database itself. What I don't understand about this code is that it creates an update command(cmdUpdate), insert command (cmdInsert) and delete command (cmdDelete). My understanding is that the update method saves the changes back to the database. So I don't understand why the author creates these additional commands.
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Jun 5, 2011
Data Adapter on VB.NET. I'm having a problem with retrieving data on different tables.
Example database: BookInfo[INDENT]BookID: HSD993Z
Title: Introduction to SQL[/INDENT][INDENT]BookID: LDJA293
Title: Advance Computer Programming[/INDENT][INDENT]BookID: KSKL194
[code].....
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Jun 5, 2011
[code]when I run my program and press this button Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles exceptionsButton.Click..I have my date range within a time that I know that my dataset should produce a result, but when I put a line break in my code here: adapter.Fill(ds)and look at it in debug, I show a table value of 0. If I run the same query that I have to produce these results in sql analyser, I see 1 result. Can someone see why my query on my form produces a different result than the sql analyser does? [code]I can also verify that the variables are passing the correct values. Can anyone please assist as to why this isnt working?
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Feb 2, 2011
I have the following
Imports System.Data.SqlClient
Public Class Main
Protected WithEvents DataGridView1 As DataGridView
[Code]......
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Feb 1, 2011
I have the following code:
Code:
Imports System.Data.SqlClient
Public Class Main[code]....
and when I run my program, I have my date range within a time that I know that my dataset should produce a result, but when I put a line break in my code here:
Code:
adapter.Fill(ds)
and look at it in debug, I show a table value of 0. If I run the same query that I have to produce these results in sql analyser, I see 1 result. Can someone see why my query on my form produces a different result than the sql analyser does? Also here is my schema for my two tables:
Exceptions
employeenumbervarcharno 50 yesnonoSQL_Latin1_General_CP1_CI_AS
exceptiondatedatetime no8 yes(n/a)(n/a)NULL[code]......
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Jan 15, 2009
I have an application in which i have to load the grid using MS Excel and save that excel to Sql Server.
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Apr 18, 2006
Honestly I do not understand why I need to write code to update a databse and why it stores it localy. I'd simply rather the system update the individual row after it is scrolled off of.
In either case since I guess I can't do that.
Here is some code in a button on a form
Try
ItemsTableAdapter.Update(NewCreationsDataSet1.Items)
LineCodeTableAdapter.Update(NewCreationsDataSet1.LineCode)
Catch ex As Exception
[Code].....
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Aug 3, 2010
I am trying to catch an error while dimensioning the DA (SQL Data adapter)Have not used Try ..Catch so pls bear with me for this juvenile crime!
Code:
Try Dim da As New SqlDataAdapter Dim ds As New Data.DataSet If conn.State <> ConnectionState.Open Then conn.Open() da.SelectCommand = New SqlCommand da.SelectCommand.Connection = conn
Catch ex As Exception MsgBox(ex.Message)Finally 'conn.Close() ' endEnd Try What I am trying to do is the catch the "object not set to an instance of an object error" and if caught I want to continue.I would like to know what to add in the Finally section?I have not tried this I would like the gurus for any inputs before I try it in my program.
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Aug 31, 2009
how to connect the oledb data adapter in vb.net 2005?
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Nov 1, 2006
If you are creating a new adapter, drag a data adapter object from the Toolbox onto a form or component.
I cannot find Data Adapter object anywhere in the toolbox. I assume it would be under the Data grouping, but it is no where.I also "Reset ToolBox" and it is still not there.
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Feb 26, 2009
Hoping for some advice, probably an easy question for most people on here but I'm a mere learner. Basically, what would generally be the reason for using a Data Set via adapter rather than just connecting to the database directly using an SQL connection?
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Mar 22, 2009
I'm currently coding an ATM system in VB, and when a user picks a card to 'log on' with, they have 3 attempts to log on before the card is confiscated. The card numbers are in a combobox (which are retreived from an SQL database using the DataAdapter), and each card has a boolean 'confiscated' field in the database.
[Code]...
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Jul 1, 2011
below is my code:
myCommand = New SqlCommand("SELECT VisitorID, VisitorName, Skill FROM tblVisitor LEFT JOIN tblSkill ON tblVisitor.SkillID = tblSkill.SkillID", myConnection)
myAdapter = New SqlDataAdapter(myCommand)[code]....
then it catch an error as Incorrect Syntax near". which it points to myAdapter.Fill(myDataSet, "tblVisitor") not the Select command.
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Mar 15, 2012
i want to populate a listbox from a sql database and foll is the code i encountered error with:
Dim con As SqlConnection
Dim cmd As SqlCommand
Dim lrd As SqlDataReader
[code].....
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Jan 25, 2011
I'm receiving the following error when trying to use a table adapter to Load data into a form.
"Too many agruments to Public Overridable Overloads Function Fill(dataTable As BCPM_DDBODataSet.LTC_FBSDataTable) As Integer"
I'm using a TeraData backend and this is pulling up the form based on selection from search results.
Search Form:
Private Sub cmdSearch_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles cmdSearch.Click
Me.lstResults.DataSource = Nothing
[Code]....
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