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?
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I 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
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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
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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 have an issue with a data base updating it won't update for me in debgging mode it is stopping here on this bit of code which is highlighted in red. the error which comes up is .(update requires a valid update command when passed datarow collection with modified rows.)
Public Sub UpdateDataSource(ByVal ChangedRows As database.dataset1)
Try
'The data source only needs to be updated if there are changes pending.
If (Not (ChangedRows) Is Nothing) Then
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Here's my code
Dim suppQuery As String = "SELECT [Supplier ID],[Company],[Last Name],[First Name],[Email Address],[Mobile Phone],[Office Phone],[Address],[City],[ZIP/Postal Code],[Notes] FROM [Suppliers]"
Dim dsSupp As New DataSet
Dim daSupp As New OleDbDataAdapter(suppQuery, cnPharma)
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It errors on the da.Update line and by the way if it helps, the text fields are a product of datarowview. that is when you select an item on the listbox the details of that appears on the text fields. and my goal is i could edit those text fields and save them.
We know:"UPDATE tt SET Points=" & iPoints & " WHERE Ref='" & sRef & "'"Can we update several records using UPDATE command at one time?
View 4 RepliesI am completly flummoxed!!! I have writen code for updating my table from a form but when I use the same code only changing the table names it wont work I get the following message: "Update requires a valid Update Command when passed DataRow collection with modified rows" My codes are as follows:
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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 RepliesObjective to clear the datagrid view after updating. This should happen when the user clicks the OK button when the update is confirmed. Below is what i have.I currently have
Private Sub SaveToolStripMenuItem_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles SaveToolStripMenuItem.Click
'This updates datsource
Try
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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:
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.
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If MessageBox.Show(mensaje, "Actualizo", MessageBoxButtons.YesNo, MessageBoxIcon.Warning) = DialogResult.Yes Then
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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...).
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
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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]
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My program is doing good when I suddenly bumped into this problem.I dont know how to do the next functionality that I need to accomplish.I am done with inserting values, showing the gridview etc and it works great. Now my problem is the update command.
I have 2 tables
table:tblDest
Fields:
destLastName
destFname
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i am writing a code where the user will update the staff,but my update command has some problems. i think its the comma's in my command,
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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
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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 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"
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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 am trying to update a column in my database with the date selected from a control on my ASP.NET web page. I need to ensure that the code is correct because nothing is updating in the column.
Code:
Command = New SqlCommand("UPDATE Parking SET ParkingStartDate = @StartDate1 WHERE Parking_ID = @radio)", myConn)
Command.Parameters.Add("@StartDate1", SqlDbType.Date).Value = StartDate.SelectedDate
Command.Parameters.Add("@radio", SqlDbType.VarChar).Value = radio
Command.ExecuteNonQuery()
myConn.Close()
if the column is already NULL, is it correct to use the update statement?
I have this code that works for adding a record.
Dim da As New OleDbDataAdapter("SELECT TrainingTitle, TrainingDate, TrainingInstructor, TrainingDescription FROM tblTrainingHistory", TRAININGcn)
Dim ds As New DataSet
da.FillSchema(ds, SchemaType.Source, "tblTrainingHistory")
da.Fill(ds, "tblTrainingHistory")
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But I wanted to show the autonumber to the user for reference. How do I know what the autonumber is?
i Have a SqlDataBase in Which It Have Three Fields Namely **" mc , amount , customername Now I am Update this Fileds Using Upadte command In vb.net Form now Wat I Need is I Want To Add This New Value While Updating With the Previous Value
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I am using VB 2005 and the following code returns an error: No value given for one or more parameters. I swear I've done this before without any problems but I can't find my original code.[code]I tested the value of oldid which is set earlier and it does have a value.
View 2 RepliesI have been using examples from the textbook creating a OleDbDataAdapter using the wizard, everything works fine loading the data into the dataset, but when i try to update the dataset, it doesn't save tod the database, can someone please tell me what im doing wrong: I created the data adapter and dataset using the wizard, I binded all applicable textboxes. I do not get any errors the update command just doesn't save to the Access Database.
This is my code
Imports System
Imports System.IO
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I 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
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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>
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We have two update panels on our webpage. Now first update panel is having button cancel. While second update panel is having a file upload control.Now if the user uploads a file that is going to upload in about 2 mins, and in between, say after 30 seconds the user clicks the cancel button, the upload taking place in update panel 2 should stop.
View 2 RepliesSo this is my code... most of it autogenerated... i have created a database, and one table and i stucked trying to update items in table...
Here is the code:
Public Class Form1
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
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