VS 2008 SQL Database Insert/Update Fails?
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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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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Jan 5, 2011
I am using this code to Add rows to a SQL database, and it adds the row to the SQL database if column 7 is not null. After it adds the row to the SQL database, it deletes it from the Access Dataset, and updates the Access Database. Sometimes double rows seem to get inserted into the database, so I'm thinking there is an error in my logic somewhere here.
Dim rowcount As Integer = AccessDataSet.AccessTbl.Rows.Count
Dim y As Integer = 0
For x = 0 To rowcount - 1
txtRow = AccessDataSet.AccessTbl(y)
If IsDBNull(txtRow(7)) = False Then
[Code] .....
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Jun 9, 2011
how to add, insert, delete and search data in vb 2008 using mysql databases.
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Jun 6, 2010
I created a dataset and i am using OleDbDataAdapter to insert new values to access database. But when i close the program and after open it, values are not in the database. How can i solve this problem? Also, i have another problem. When i write codes that
[Code]...
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Dec 26, 2011
I have an interesting problem. I need to write a program that checks to see if data has been inserted or updated into a Microsoft access database . The program needs to be compatible with both types of access database, so using triggers is not possible as it wont work in access etc
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Apr 24, 2010
how to insert and update the data to the database when i am using window forms?
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Nov 7, 2010
i has one problem in which i can enter some of a data to the database.Ho can i code this things..i used Insert and update query....the value is type double,integer...and also string.....
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Jun 19, 2012
right now i'm trying to google some related article about LINQ to better understand it. But I came across with this issue been googling to find some answer but I didn't get lucky so here my problem.
For Each lvItem As ListViewItem In lv_orderlist.Items
passSQL = "INSERT INTO t_selling_history (f_product_id_fk, f_qty, f_qty, f_user_id_fk, f_created_dt, f_trans_status)" _
[code].....
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Apr 15, 2012
I am using VB.NET 2010 and SQL Sever CE 3.5 database. I insert some data into my database (SDF file) and I can do any all manipulations with those data. But I cannot see those data in the data table using Data Source or Server Explorer in Visual Studio. Even If I check it once in Server Explorer, all data in the database will be deleted.
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Jun 14, 2011
I wrote simple update/insert statements that are returning a syntax error, what am I missing? The table name is notes, the field note is type memo, acaps is a double. update notes set note='why is there a syntax error' where acaps=12345
[Code]...
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Jun 3, 2011
i have an datagridview bound to an access database, the table is empty so i want to use the datagridview to insert and update data to the database.so if i enter a complete row of data, i have an update button that looks like this
vb Private Sub Button3_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button3.Click Dim tableAdapter As HEALTHDataSetTableAdapters = New HEALTHDataSetTableAdapters.HEALTHDATATableAdapter()
tableAdapter.Update(HEALTHDataSet)
End Sub
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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:
.
.
.
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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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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May 20, 2010
I am writing an application that does a number of different things with data downloaded from hardware which is monitoring the power used in my home and produced by my PV Solar array. I have run into a roadblock early on, because I cannot seem to get new data into an Access database that I have linked to my application by means of a DataSet. I have checked the DataAdapter's InsertCommand, DeleteCommand, and UpdateCommand definitions (created by the DataSet Wizard), and they seem to make sense, and nothing is throwing exceptions or otherwise making VB complain, but new rows added to the dataset are not being added to the database.
[Code]...
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Sep 17, 2010
I got a system which i want to insert, delete, update the data into my database and the data from database will be display using datagrid. The below is the coding for one of my button, delete.
Private Sub btnDelete_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnDelete.Click
Try
btnSearchEmpNo.Enabled = False[code].....
Now I wanna set when user click on this button to delete a employee (for example) then the datagrid that i have in my application will not show the data of the deleted employee but in the background, the employee haven't been deleted from database.The employee only will be deleted from database when the user click on SAVE button.I know this application have to use RowState but how?
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Dec 17, 2010
I've got results in a loop format from a XML file, I want to either insert them into my SQL database or update them if they are already there. My question is more around lodgic, do I have to
1. Get each item.
2. Do a search for it and see if it's in there.
3. If not add
4. If so update
Or is there a quicker way because with 200 records at a time, search then update/insert will slow down the process.
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Apr 27, 2010
I've only been doing this a few weeks but been struggling with getting some simple commands working.I'm trying to get an insert into statement working, it works fine with a table in access 2007 that is text fields, however it wont work once I use a number field. Here is my code which doesn't work.
Private Sub btnInsert_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnInsert.Click
Dim Sql As String = "Insert into staff(Firstname, Surname, Zone, Department) VALUES ('" &
[code].....
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Oct 21, 2009
I'm trying to get an insert into statement working, it works fine with a table in access 2007 that is text fields, however it wont work once I use a number field. Here is my code which doesn't work.
Private Sub btnInsert_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnInsert.Click
Dim Sql As String = "Insert into staff(Firstname, Surname, Zone, Department) VALUES ('" & txtFirstname.Text & "','" & txtSurname.Text & "'," & txtZone.Text & ",'" & txtDepartment.Text & "')"
[code]....
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Jun 1, 2009
i am using MsAccess as database.insert/edit/delete commands are working perfectly in my code. the problem is that if i insert a record it is definitly inserted in table in MsAccess but that cannot be seen on runtime. To see that inserted record i have to close MsAccess Table to verify that the record is inserted there. And also I have to stop debugging and then restart debug to see that the record is being displayed in Datagridview. How i can changes in records can be seen on runtime in DatagridView as well as in the MsAccess table on runtime.
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Apr 15, 2010
looking at the code below I have a form that is inserting data from text boxes and a datetimepicker into my database.If Date.text and Shift.text already exist in a row then UPDATE instead of INSERT a new row?
conn.ConnectionString = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=database.mdb;"
da.SelectCommand = New OleDbCommand("SELECT ID, idate, icomment, ishift FROM table")
da.SelectCommand.Connection = conn
[code]....
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Feb 7, 2011
I built a dwonloader program which download a file from the web. I would like to insert an error message that pop up whenever the program fail to download the file and/or when the computer gets disconnected from the internet while the program is downloading the file.
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Jan 16, 2012
I am trying to save a new object to the database using petapoco.I have an object that uses a Guid for the primary key.Here is an example of the objects primary key property.
<PetaPoco.Column()> _
Public ReadOnly Property Primkey() As Guid Implements IStandardDocument.Primkey
Get
[code]....
Here is an example of the save method.
database.Save("Reservations", "Primkey", reservation)
The sql that is generated is an update with a primkey of 00000000-0000-0000-0000-000000000000 instead of an insert. So new records are never inserted.If I have an existing object with a valid guid the update and delete all work correctly.
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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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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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Jan 2, 2010
I'm using a OleDB connection to a access database. I'm entering a row into the database to set some user preferences. What i need to get is get back the row ID of the row I just entered. I'm more familiar with PHP and with PHP I use use this entry
[Code]...
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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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Jul 21, 2010
I have a gridview that is set to a sql datasource, it is generating the columns automatically. If I add a column to the table it is referencing, it will draw that column and display it, but it does not update the insert/update commands to include the new column. Is there any way have it rebuild those commands automatically?
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Jul 3, 2009
I have a gridview in which when I click edit, update, and cancel button comes. I have a variable named status. If status=false then update should change to insert and if status=true then update should be update itself.
<asp:TemplateField >
<ItemTemplate>
<asp:LinkButton ID="lnkEdit" runat="server" CommandName="Edit" Text="Edit">
</asp:LinkButton>
[code].....
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May 12, 2010
i have this code
Public Sub insertMe(ByVal MyQuerrys As String)
On Error GoTo errorhandler
Dim constring As String = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source =
[code].....
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