when i type the number in textbox3, why the number update to database not accurate ?
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim com As New OleDbCommand
Dim qty As Integer
Dim d As Integer = 0
[code]....
why this code the number i add not expected what i want?
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim com As New OleDbCommand
Dim d As Integer
Dim qty1 As Integer
[code]....
Whats with this??the result of:CDbl(csng(35.8))is:35.799999237060547
View 2 RepliesNow it updates when I press the update button and then it displays the data like it has updated the database, but when I close the program and run it. It displays the data as not updated WHY DOESN'T THE DATABASE UPDATE?Same with the Add and delete commands, I've almost finished my program but there's always a problem :...
Dim StudentID As Integer = Me.Lst.SelectedValue
Dim con As New SqlConnection("Data Source=.SQLEXPRESS;AttachDbFilename=|DataDirectory|StudentTeacherDB.mdf;;Integrated Security=SSPI")
[code]....
im trying to update fields in my access database using a vb form with richtextboxes with a button press, i have some code i think im missing an execute code but am unsure on how to do this?
Dim sql As String
sql = "UPDATE Staff SET Address =" & rtbAddress.Text & _
", Contact Number = " & rtbContactNumber.Text & _
"WHERE Staff ID = " & rtbStaffID.Text
I have one small problem with Windows application. I have to update database (sql server compact) via window forms. When i copy this database file on local disk, i can set connection and update without any problems.
View 2 RepliesI'm using DataAdaptors to pull data into a DataGridView. I want to make changes to the data via my DataGridView and then update the database when the user clicks the 'Update' button, but I can't figure it out. Below is my code.
Dim SQLconnetionString As String
Dim SQLconnection As SqlConnection
Dim SQLCommand As SqlCommand
[Code]....
find the attached text file. i need to insert the contents of the text file ( as colummns) into an access database how to make the data in the text file as column wise and then store it in the database.
View 3 Repliesode if I/m wrong i cannot save my file im using sql server 2005
Imports System.Data.SqlClient
Public Class Form1
Private cs As New SqlConnection("Data Source=GSM-DB6CB13C69E;Initial
[code].....
I'm at the moment busy with a project for school. Well I have a datagridview that displays all of the employees within the company. But I want to be able to change, delete or add new employees in the datagridview and then save it in the actual database. I used this code to do that.
Me.Validate()
Me.TblPersonnelBindingSource.EndEdit()
Me.TableAdapterManager.UpdateAll(Me.DtsPersonnel)
But when I run my program and click on the save button I get this error message:
Application Exception was unhandled
TableAdapterManager contains no connection information. Set each TableAdapterManager TableAdapter property to a valid TableAdapter instance.How can I get around this? I think it has to do that my dataset exists out of 1 table but actually it contains items from 2 tables. Would this be the problem?I need to have the dataset like that though otherwise other parts of the program won't work.
I'm using a DataGridView in a Windows Forms application to update a table in my SQL CE database. The code runs without error; however, it appears that the database table is not being updated. I had this working at one point, now it is no longer working.
Private Sub BtnCommitChanges_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles BtnCommitChanges.Click
If Me.CLCitiesDataSet.HasChanges = False Then Exit Sub 'Exit sub if no changes to dataset
Dim SQLCommand As New SqlCeCommand("SELECT * FROM Cities")
[code]....
i m unable to update data into my database in vb 2008. the changes are reflected in the dataset but they are not reflected in database. i have set the datasource's copy to output property to copy if new but it is still not working.
View 6 RepliesI'm actually making a library system and I'm having problems with my data not saving in the database. It does appear in the DataGrid but after I close the application and check the database, nothing's there. [URL]
Here's the code.
Imports System.Data.OleDb
Imports System.Object
Public Class AddBook
[Code]....
This is in a BindingNavigator. I'm trying to get it to save to the database when i click the Save button. This is what I have so far:
vb Private Sub SaveToolStripButton1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles SaveToolStripButton1.Click
[CODE]..............
It's telling me "Object reference not set to an instance of an object." on the dsNewRow declaration, I have no idea what that means. That same code (aside from different names) works fine another another project.
i got a table in a datagrid, i did the whole connection with visual basic, the one to add a database, and now i see my mdb database in datasources and all..
this is my code
vb.net
Public Class InventarioIps
Private Sub InvIPS04_10BindingNavigatorSaveItem_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles InvIPS04_10BindingNavigatorSaveItem.Click
[code].....
I dont know if i have to create the connection to the table in this code so it can update,save,delete my info in the datagrid directly to the database source.?
When i save the info it only shows in the DATABASE thats in the BIN directory not the other one (the main one)...but either way when i close the whole project and open it again it loads the info from the main DATABASE and of course the BIN one changes witout the saved data?
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]...
how i can add, delete, edit, update data of ms access file using visual basic 2008
View 3 RepliesI will be displaying most of my data in a Listview, One I found that works with how I want it starts like this:
Dim Connection As New OleDb.OleDbConnection
Dim DataAdapter_ As OleDb.OleDbDataAdapter
Dim DataSet_ As New DataSet
[Code]....
The Add, Update and Delete on the tutorial didn't seem to work any chance
I am trying to update a SQL Server database Date field.When the user enters the date they enter 02 Oct 2010.When I pick up the DateTimePicker.Value it is 10/02/2010 00:00:00. I need to get the value to read 02/10/2010 00:00:00 How do I get the value to be in this format?
View 7 RepliesI 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] .....
How to perform add, edit, delete in a dataset that will update the database as well?
View 1 RepliesThis is the hardest part of LinqtoSql database handling operations in visual basic 2008 I ever encountered,w/c is the update operation cause Ive been posting this thread several times from the other forum site but noone yet was able to answer my question,examples were given but its not efficient cause it won't specify based on the codes i gave and i know its not easy but im still hoping that one of the answerers of this forum will be able to resolve this particular linqtosql operation codes. I used textboxes in manipulating all data into the database such as displaying records, adding records, & updating records, basically I used with textboxes in doing those database operations. I will give you 3 block of codes w/c corresponds those database operations I used and differentiate from each other inorder for us to determine why one of them has no progress or won't do its operation w/c is the update operation...
*************Block of Codes#1(Adding Records)*************
Private Sub Button1_Click(------------------) Handles Button1.Click
Dim db As New memrecDataContext()
[code]....
I would like you to identify,differentiate, or troubleshoot the block of codes#3, or anyhow, why it has no progress at all or it won't edit and change the records but it runs and no error in regards with its code, and the other 2 blocks of codes were able to successfully do its operations.I was just wandering why only the block of codes#3 is not doing its operation successfully when you change the record being displayed in the textbox.Is there a possible way to edit records in the textboxes?If there is.... Is it possible to debug the block of codes#3 to successsfully do its operation? If you could possibly give an example,can you based it on the block of codes#3?
I've got a question below:load data from a table in database into a datagridview,make change in datagridview,and use update function to update change back to tablebut 13 changes, only 12 being update back to databaseonly the top row on the datagridview not being update??
For Each orow As DataGridViewRow In DataGridView1.Rows
orow.Cells(1).Value = TextBox1.Text
Next
[code]......
I 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.
how to add, insert, delete and search data in vb 2008 using mysql databases.
View 1 Repliesupdate statement, i am trying to update a row within a access 2007 database here is my code.
[Code]...
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 RepliesI have a txtbox(for barcode).. if i input a item number in that txtbox and if that number will match in your database, the other information(shall we say, product type, item ID, etc..) will display in my other txtboxes..
View 5 RepliesI want to build a metronome,which sounds a beep in a specified time interval.The beep has to sound exactly the right time, after all, is a metronome.I need a timer that runs events(tick event)accurately.The timer control is not for this.
[Code]...
I set the value in VBT as 1.205, but if i print that value in Immediate window it get changed to 1.20492553710938. I need to display the value, whatever i have set.
what is the problem here and the solution to get the value whatever i have set?