I have a program, that on form load, updates a value. The problem is, that it doesn't work!
my
Imports MySql.Data.MySqlClient
Public Class Form1
Dim MysqlConn As MySqlConnection
Dim UserCommand As New MySqlCommand
Dim SQL As String
[Code] .....
And the problem is that it doesn't update the points. I set the points to 10 via PHPmyadmin, and run the program, but when i go back to PHPmyadmin, its still 10.
I'm creating part of a program which calculates vacation hours multiplied by accrual rate. As of right now all parts of the form are functioning and saving/retrieving data from a csv text file. My problem is that I'd like to bring the process out of a button.click event and into Form_Load. Currently when I click a listview item (lvwData.SelectedItems) it populates a textbox (txtAvail), then recalculates the textbox value based off my formula (hours) and updates the listview's 4th column item. To update each column daily, I currently have to click each row, then my button, then move onto the next item. I'm looking for a way to grab the 4th column, recalculate it and update the listview without having to select each row.
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I have a project in which i have a form in which there is add button to add pages. In form load the last entered page populates all the fields. Now thing is if user edits the values in controls it has to update the db with those fields and if the page doesn't exist in db it has to insert.
Here is my code
Private Sub inserting()
Dim cn As New OleDb.OleDbConnection
'Dim selectquery As String
cn.ConnectionString = ""
Dim cmd As New OleDb.OleDbCommand
[Code] .....
I initialized a global variable x and set its value to 0 in page load and in add button click to 1. Depending on x value it either inserts or updates the db in form closing and add button click. Now whats happening is If the user clicks on add button the page increments but if user doen;t enter any values and tries to close the empty form, value of x =1 and it tries to insert but as there are blank fields cmd.executenonquery throws an error.
"The field is too small to accept the amount of data you attempted to add. Try inserting or pasting less data."
What should I do so that it doesn't give an error. I am using access db.I even checked in db Except for primary key(pageno) all other fields have "allow zero length" as YES & "required" to NO.
I have a form consisting of datagridview and two buttons of update and load all.. I have used fillby method to obtain data from database. The query seems to be working fine, except that the data is not shown in the gridview.As in, for the qeury, if the returned rows are 2, it will show 3 rows in the gridview, but all empty.
Imports System.Data
Imports System.Data.OleDb
Imports System.EventArgs
[code].....
All I want is to update the selected row data in form1 to another form2
Form1 Objects
Form1 = MainAppForm
DataGridView = DGVMain <= binded
Button = btnUpdate
Form2 Objects
Form2 = frmUpdate
Button = btnSubmit
15 textBoxes = you can see its name in the code below and all of them are data binded
MainAppForm Code
Pass the selectedrow data to form2 (frmUpdate)
Private Sub btnUpdateDouble_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnUpdate.Click
If DGVMain.SelectedRows.Count = 1 Then
Try
frmUpdate.ItemIDTextBox.Text = DGVMain.CurrentRow.Cells(0).Value.ToString()
frmUpdate.PartTypeTextBox.Text = DGVMain.CurrentRow.Cells(1).Value.ToString()
frmUpdate.PartNameValueTextBox.Text = DGVMain.CurrentRow.Cells(2).Value.ToString()
frmUpdate.PackageTypeTextBox.Text = DGVMain.CurrentRow.Cells(3).Value.ToString()
frmUpdate.QuantityTextBox.Text = DGVMain.CurrentRow.Cells(4).Value.ToString()
frmUpdate.UnitTextBox.Text = DGVMain.CurrentRow.Cells(5).Value.ToString()
frmUpdate.DescriptionTextBox.Text = DGVMain.CurrentRow.Cells(6).Value.ToString()
frmUpdate.LocationTextBox.Text = DGVMain.CurrentRow.Cells(7).Value.ToString()
frmUpdate.ProjectBoardTextBox.Text = DGVMain.CurrentRow.Cells(8).Value.ToString()
frmUpdate.CommentsTextBox.Text = DGVMain.CurrentRow.Cells(9).Value.ToString()
frmUpdate.OrderCodeTextBox.Text = DGVMain.CurrentRow.Cells(10).Value.ToString()
frmUpdate.CurrencyTextBox.Text = DGVMain.CurrentRow.Cells(11).Value.ToString()
frmUpdate.UnitPriceTextBox.Text = DGVMain.CurrentRow.Cells(12).Value.ToString()
frmUpdate.SupplierTextBox.Text = DGVMain.CurrentRow.Cells(13).Value.ToString()
frmUpdate.ManufacturerTextBox.Text = DGVMain.CurrentRow.Cells(14).Value.ToString()
frmUpdate.Show()
Catch ex As Exception
System.Windows.Forms.MessageBox.Show(ex.Message)
End Try
ElseIf DGVMain.SelectedRows.Count = 0 Then
MsgBox("Please select one item to update!", MsgBoxStyle.Information, "Update")
Else
MsgBox("Updating multiple Items is not allowed!", MsgBoxStyle.Information, "Update")
End If
End Sub
Form2 Code
I want to update the data by this code, but it refresh only the data in Form1
Private Sub btnSubmit_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnSubmit.Click
Me.Validate()
Me.SparePartsBindingSource.EndEdit()
Me.SparePartsTableAdapter.Update(Me.InventoryDBDataSet.SpareParts)
'Refresh
MainAppForm.SparePartsTableAdapter.Fill(MainAppForm.InventoryDBDataSet.SpareParts)
End Sub
No problem in updating the data if I put the code below in Form2 load event
Me.SparePartsTableAdapter.Fill(InventoryDBDataSet.SpareParts)
but the problem is, it will refresh all the data in the Form2, and my code in Form1 becomes useless.
Thanks in advance!
I have been on a database project for a while now. I wanted to be able to make changes to my database using the update command of a Datagridview control.However, I have been faced with a series of unsuccessful outcomes.I want to do this how do I go about it?
[Code]...
Imports System.Data
Imports System.Data.OleDb
Public Class Form1
Dim con As OleDbConnection
Dim cmd As OleDbCommand
[CODE]...............
The insertion part of the form works great. But my problem is in the form load part......If i leave a field blank(Null),then perform Save operation,close the form after successful insertion and then reopen the form,then it retains the previous values during the form load......This is only in case where i leave a field blank in the previous data entry in the database.......But if i enter values in all fields then form load is working great.
How can I load a form and allow it to run it's code in the form load but keep it not visible. I want it to do what it needs to but but not display.
View 3 RepliesThe program is finished I am on testing part. But I cant run the program. What happened was since I did this I got new PC so I had to install everything from scratch.. So now after downloading the mysql .net connector to connect to database and installing it i keep getting this error
"Could not load file or assembly 'MySql.Data, Version=6.1.3.0, Culture=neutral, PublicKeyToken=c5687fc88969c44d' or one of its dependencies. The system cannot find the file specified."
I tried everything Installed every single past version of the .net connector but I still keep getting error. I tried this on my laptop and even my new pc (which is 64bit so I thought thats the problem) but since I get the same error on laptop I don't know what else to do.
Ok so I have a Mysql dsetup called in-out and I have written a vb.net client program to get information from the table in the database, display it in a data grid view, and then allow to user to edit this information and update it on the server. Right now I am hosting the server on my Gateway laptop and also connecting to it from the same laptop therefore I'm using localhost as the server name. My problem is that when I go into the program and change the information and click update, nothing happens... the information stays the same yet there is no sign of an error, syntax failure, or program crash.
I've tried running this on another computer in my house and i get the same results. I can access the information without a hitch but updating it is where I run into trouble. If there was a problem with my code it would have displayed some sort of error or asked me to debug my script, which would have made it a lot easier to solve, therefore i am certain that it has something to do with my database. Before I got to this step, i kept getting an error when retrieving the information that said something like
[Code]....
I have been trying to update my database I only receive a msg box replyng that my msg is successfull updated but when i check my database no data is being saved!
here is my code for update
CODE:
Here is my changePassword button code where I call the method UpdateDB:[b]
CODE:
Should I open a connection to MySQL at the load of my application and close it when you exit or should I open and close the connection only when I need to run queries?
View 1 Repliesi have problem to search and update record database sql. this is my code. i using mysql database and Microsoft Visual Basic 2008
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but i have error on Word command.ExecuteNonQuery(): MySqlException was unhandled. There is already an open DataReader associated with this Connection which must be closed first
I am trying to update a field in my MySQL database using VB.NET.....
Basically, I can read the field's content, using this code:
SQL = "SELECT * FROM `boomtable` WHERE `Tab1` = 'CLOSED'"
However, I want to update the Tab1 field to have the value OPEN if it's currently closed, and make the value CLOSED if it's currently OPEN.. Right now, it's CLOSED, (I put the value in manually when making my table)
Here is the code I'm using that changes my label based on the Tab1 field's value that works fine... Except I want to actually make it update the field in the database in addition to changing the label text.[code]...
I am trying to update mysql table from a txt file using vb.net. So far I've found code here and there and been able to extract the data from the txt file, now my question is how to update mysql from the same dataset or xml file. Here is my code to populate the datagrid/dataset/xml file.what is the easiest way to update mysql assuming "Orden" is my primary key in mysql.
OpenFileDialog1.Filter = "Text File|*.txt"
OpenFileDialog1.Title = "Open File..."
OpenFileDialog1.FileName = "trackings"
[code]....
I Use visual Basic 8.0 and Mysql 5.0 I have one Table1:
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I want to use Datagridview to update Mysql table1. All changes as update, change, delete automatically processed into Mysql table1. Here by my code
[Code]...
I have been working on something that checks an MySQL Database to check something - however the program stops responding because it is constantly checking the database. Is it possible to have it wait a few seconds to recheck the database? [code]...
View 2 RepliesI made an app that connects to a mysql database to update a table. It works fine from my test machine, but if i deploy the app to another computer I get error: Unhandled Exception: System.IO.FileNotFoundException: Could not load file or assembly 'MySql.Data, Version=6.3.6.0 I'm going through google to find a solution, but nothing has stood out yet, just wondered if anyone has encountered this before and knows of a quick fix.
View 2 RepliesI have made this code, which is to update the MySQL db, the only problem is that even though i got try on, it dosnt catch any erorrs, and the code is not working, meaning it dosn't update anything in the db.
code:
Private Sub updateSqlData()
Dim nSQL As String
[code]......
I have built a dataview where i display data information from tables which was created in MySQL. Can i update the datagrid cells by just clicking it and entering new information ? By updating the datagrid cells, will it automatically the relevant database tables ? If yes, how do i go about writing codes. All the cells now just consist of text format data.
View 11 RepliesI can't figure out how to update a field in a MySQL db using MySQL Connector Net 5.2.5. Can anyone show an example code?
View 2 RepliesI am building a vb.net application for a client, and there is a problem. I am connecting to a mySQL server, and using the UPDATE command to update certain fields to the specified values, however, once I run this code, the fields on the mySQL server turn EMPTY. Here is my code :
Sub updateresidents()
'MAKES NO SENSE; UPDATES EMPTY FIELDS ON mySQL SIDE??!!!!!!!!!!!!!!!!!!
Dim connection As MySqlConnection
[Code]....
I am using VB.NET with a MySQL database. I want to update this code to do it all in ONE SQL instead of THREE. Here's the code I'm using, works fine but too slow with multiple lines...
If count3 = "1" Then
Dim myCommand As New MySqlCommand
Dim myAdapter As New MySqlDataAdapter
Dim SQL As String
myCommand.Connection = conn
[Code] .....
I've been working with a remote mysql database. The design of the database pretty much requires that I use SELECT commands that include multiple tables, and sometimes joins. Updating a single table query is SO EASY, yet dealing with multiple tables has me pulling my hair out.
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What's killing me is that if I make a change to a field in the products table in the datagridview and press button1, the changes are saved. If I make a change to a field in the specials table in the datagridview and press button2, the changes are saved. If I combine the two updates together in a single routine, only the first one is saved. I presume this is because after the first update executes, the dataadapter no longer reports that there are any changes to save, since the update already happened.
I've tried breaking this up into separate dataadapters for each table, but then even using dataset relations, I can't get the data together in a single datagridview. On top of that, the grid itself is only intended to be used for searching and querying data. It still needs to be bound along with a set of textboxes that accept the input.
Lastly, this database is part of an ever-evolving website database with dozens of tables that need interfacing. I just can't see manually maintaining hand written sql statements for every table. That's why I've been working so hard to get the commandbuilder to handle it.
I've just switched from classic ASP to .net and I always used the following to SELECT, INSERT, UPDATE and DELETE from my MySQL databases:
' Create db connection
Function dbConn()
Set objConn = Server.CreateObject("ADODB.Connection")
objConn.Open "driver=x;Server=x;Port=x;Option=x;Database=x;Uid=x;Pwd=x"
[code]....
And to insert, update or delete I'd use:
Call SQL(1,"DELETE FROM Users WHERE UserID = 1")
My program connects to a Mysql Database. It allow registration and login. I Need this to update the "BankACCid" column(?) in Mysql for the current logged in user.This is the code that doesn't work
MySql Connection
Dim conn As MySqlConnection
conn = New MySqlConnection()
[code]....
how to add, insert, delete and search data in vb 2008 using mysql databases.
View 1 RepliesI would like to load a default created image at start. But seems to not be working on form load any ideas.[code]
View 5 RepliesI'm still in my novice stages of .net development, and I think I may be trying to make something too complicated.In VB.Net 2008, I'm using a SQLDataAdapter to Fill a dataset with records being returned from a Stored Procedure (SQL Server 2005).I'm using that dataset as the datasource for a gridview. Up to this point, everything is great and I understand what's happening.I'm getting ready to make my first-ever attempt at updating the data in thegridview and then pushing the updates back to the SQL dB.Here's where I'mgettingconfused...to cut to the chase, what's the simplest way to load the updates back into SQLServer?
View 2 RepliesI have a couple of tables in a sql server database and i want to load the data from them in form load.
Here is the code i use to load the first table
connection string here
Con.Open()
Dim objCmd As New SqlCommand("SELECT * FROM Customers", Con)
Dim cust As SqlDataReader = objCmd.ExecuteReader()
[Code]...