i am just developing a library management system as one of my project. i using vb.net 2010 and the MS Access 2007 as back end. when i save some records into my database through my application it is correctly saved and i confirmed it through opening the relevant table in the database. but when i restart the application all the entered data were missing..
View 5 RepliesI am fresher in vb.net but I have experience in vb 6.0. But I want to connect database in sql server through sql connection. In that case how to create connection with window or sqlserver authintication mode and how to add or update new record in data base in batch transaction. Please help me with sample code.
So that I can understand eassily.
update statement, i am trying to update a row within a access 2007 database here is my code.
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I am using vb.net with access database. I am using sql. How can i update database with the value 40'6"(Feet and inches values)
View 5 RepliesWhat is wrong with this code. It does not update the access database and no error.
Dim conn As New OleDbConnection
Dim sqlQRY As String = "SELECT * FROM StdMaster WHERE StuNo = " & txtStudentNo.Text & " ORDER BY StuNo"
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is there a way to update a database row with the update command by first defining all parameters and then all values just like you can in the insert command? "insert into table1 (parameter1,parameter2,....) values (value1, value2,....)"something like "set table1 (parameter1, parameter2) values (value1,value 2,...) where ...."?because I only know the syntax to define each parameters value "set table parameter1=value, parameter2=value2... where"
View 8 RepliesThis program is very difficult for me, but I must get threw it or I cannot finish... What I am doing is making a Database of foreign Languages with the spelling of the words and the pronounciation inside the database... The USER enters a paragraph of words into the translator textbox and pushed translate. The program has a DATABANK of words with the phonetic spellings and matches the word, then translates to phonetics. The problem is that new words keep appearing inside the language. So I incorporated a Database of 2 fields
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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
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i want to update my inventory table in database from another database name. Example: In VB, i had a form named Orderform. User need to select e product that they want and key in the quantity. all these information are able to store inside my database named ORDERTAB. but now the problem is i wanted to update another field in my database named INVENTORY by minus the quantity tat the user had key previously. i totally had no idea how it going to works.
View 3 RepliesI 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?
I figure why this happens, and is because of Windows 7 and its permissions. Now I'm trying to fix this. but the code for this is a bit complicated for me. I found on this website an example on how to set the permissions on files. ([URL])
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i have the connection to the database.i have a datatable that stores the info from the database.i just cant seem to get the database to update. the program is a website and when the user clicks submits his account is created. if all the data is verified and the screen name doesnt already exist,a new row in the datatable is created and the info is stored in the correct columns. this is where im stuck. whats the next step for getting the data from the datatable to the database. do i have to insert a row to the dataset and accept again, and then with the database?
View 2 RepliesI want to update data in Province table in eUnion.mdb using Form2.
View 1 RepliesIll start this by saying im still very new to VB, ive had some programming expereice here and there since high school, but never really did much with it till now.Ive got a small app that im working on for a side project, i want to add the details of a given days records from a simple POS system i have built up so far. At this point i have all of the information generated and i cant seem to get the app to commit it to the database. I have seen tons of posts on this, and i have followed a bunch of them to no avail. Im sure this problem is because i have the code written wrong, and i cant get it figured out. Here is the code that im using to try to save the data:
Dim hoursworked As TimeSpan = dtpEndTime.Value.Subtract(dtpStartTime.Value)
hours As Double = Math.Round(hoursworked.Hours + (hoursworked.Minutes / 60), 2)
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I'm currently working on my A2 computing project, and I am having slight difficulties updating and saving the data in my database when it is entered on a form in VB. I cannot find any reason why it wouldn't work, but if someone could suggest a better way to do it, it would be great as everything else works. It's in the btnsave at the bottom, and when you click the button on the form it come up with a very unuseful error, which is no help to anyone.
This is the code for the edit details form, where on loading, the customers details which are currently in the database are already there, and they can change things on it and save it to update their details if anything changes.
Public Class EditMyDetails
Dim con As New OleDb.OleDbConnection
Dim dbProvider As String
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I am trying to update a few entries in a access database through VB.NET. With the code I used below could anyone help me out and show me where I made a mistake because it is creating new database entries instead of updating them.
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Here is my
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim NewRow As TimeClockDataSet.EmployeesRow
NewRow = TimeClockDataSet.Employees.NewRow
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I have experimented with other classes but I cannot get the database to update.
I am writing a program to assist Paramedic students in learning the Drugs that they have to know in order to pass their classes. I have created an Access database to hold all the information on these drugs, but not every student that will use this program will need to learn all the drugs contained within this database.
Right now I have 43 drugs in the database and still growing.
What I want to do is to present to the student the drugs and have them say "Y" or "N" as to whether its on their required list to learn. That way they only work on the ones that they need to.
I'm having problems with the updating of my datagridview. I can update to the MS Access database. The problem is I cannot update to my datagridview!-[code]
View 12 RepliesPublic Sub save_edit() Dim ssql As String ssql = "UPDATE tbl_philhealth SET msr = @txtmsr,sb = @sb,tmc = @tmc,ps = @ps,es = @es WHERE msr=@msr"
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i can't update my data at database this my code :
VB.NET
Private Sub cmdSave_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles cmdSave.Click
Try
'Dim ds As New DataSet
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i have problem when update data, data not updated.
I want to update a record in my database but without using "update mytblname" query. I am using following code:
sql = "select * from customer where id = " & Val(Me.id.Text)
Dim adapter As New SqlDataAdapter(sql, conn)
Dim builder As SqlCommandBuilder = New SqlCommandBuilder(adapter)
Dim ds1 As New DataSet("customer")
adapter.Fill(ds1, "customer")
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This code is not working. Means no error and data is also not getting updated.
I had created a simple program that uses a MDF file as Database, this includes in the project 2 files: mgcdb.mdf and mgcdb_log.ldf, the program installs in C:Program Files(x86)CompanyNameProgramName, then when I try to update the database I get an error "Failed to update database because is read-only".
During testing on VB I had no problems, since the database was being use by "Authenticated Users group", but on Deployment the Users group don't have enough access to work with these files. So far I know or at least I think that what I need to do is to ADD access to the user, right? Since I didn't know how to do this I found this address [URL].. where it shows you an example on how to add/remove access to a file. I changed the module to this:
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I'm writing an application to update a database with student records. I've used this particular code before, but with just a single column, but i added multiple columns to this one. when i call the sub to save the records it gives me this exception:syntax error in INSERT INTO statement at line 41
View 2 RepliesI have an application doing the following:
- Treeview with customers
- on clicking a treeview, for every project of this customer, a new MDIchild opens, where the products of this project are displayed
- the MDIchild is basically a DataGridView, which is connected to the products-table via a DataView
my Problem comes after changing a value in the products DataGridView:
- if i do not change the row, the changes will not go back to the database after an update
- if i do change the row after entering a new value, everything works fine
The strange thing is, that in both cases, the value in the DataTable is changed, the DataSet is "hasChanges=True" and the DataRow's state is "Modified".
im having a bit of trouble with the delete and add record for my database. [code]The error im getting is Update requires a valid UpdateCommand when passed DataRow collection with modified rows.
View 1 RepliesContinuing on from my adding data to the db I am using the following to try and update the db[code].....I get error while updating record on table...Incorrect syntax near ','? I can't see where it is getting this from? the the dropdownlist.text ="RC1
View 2 RepliesI'm getting frustrated on how hard it is to find a good DataGridView event, BindingSource event, or DataTable event to use to update my database. I have to use a stored procedure to do my adapters update, because when a user updates a row
I have to check for concurrency to ensure 3 other related rows to the row that has been modified hasn't been updated since the user obtained the data. For example, if my query returns 4 records and the user updates the 4th row, I have to ensure rows 1-4 haven't been updated since the user retrieved the records.
My DataSource is a DataTable and I use a BindingSource to bind it to a DataGridView. I want to update my database whenever a user changes a cell value in the DataGridView or when I change a value programmatically to the underlying DataTable. Anyone recommend an event from any of these objects?
The problem I'm having is this. When the user changes a cell in the DataGridView I want to apply a date time stamp in another cell in that same row before I update my database. If the update is successful for that row then I AcceptChanges or if it fails then I RejectChanges for that row. I can't change any values in the row in the DataTable RowChanged event because it will be an endless loop, plus it does fire when the user changes a cell. I can't use DataGridView CellEndEdit because when I change a cell value programmatically using a loop the event won't fire to do the update. I can't use DataTable ColumnChanged event because the row hasn't been set Modified so the adapter doesn't know to update the row.
What do the experts recommend?
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So I'm not familiar with much vb code but I was hoping someone my spell out something pretty generic as far as updating a database. I'm pretty sure I've successfully edited rows but when i'm using my database update i get an error, probably just incorrect syntax. This is what I have so far...
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I am at the *** end of the project and have been asked to provide update profile in the application. I have to update the photo of the user and also the signature photo
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