Updating MySQL Table DataGridView Changes
Oct 28, 2010
I have a DataGridView filled from the MySQL database table. I want the changes made on the datagridview records, update the table when a Save Changes button pressed. Here's my code which takes the data from the database and adds to the DataGridView.
Private Sub cihazmodeli_SelectedIndexChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles cihazmodeli.SelectedIndexChanged
'Loads database records to Datagridview
If Not CStr(cihazmodeli.SelectedItem.Value) = "" Then
Dim sorgu As String = "Select
[Code] .....
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Oct 28, 2010
I searched internet including this forums to find a working example about the following subject but couldn't find a solution about my problem.I have two main problems:1) I have a DataGridView filled from the MySQL database table. I want code update the changed records, when a "Save Changes" button pressed by the user.I created the code below to make it. It makes update on the changed row, but enters Null values. So after the update on the database, the values become null.2) At "Private Sub cihazmodeli_SelectedIndexChanged" section my code reads the database and loads the values to the DataGridView. When I make another change on the Combobox, it adds the values of the new SQL results at the bottom of the previous records. I tried to clean the results using either Clear() or some other methods but got a message meaning "Content entered with DataSource can not be cleaned with Clear or other methods". What is the way of clearing the previous choice's records?
Code:
Dim cn As New MySqlConnection("Data Source=localhost;Database=stokprogrami;User ID=root;Password=mypassword;")
[code].....
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Jun 12, 2011
I am trying to update a database table that's attached to a table adapter and can't quite seem to be able to get the code to work. It was suggested that I use an update statement, but the person I was working with had no idea how to update a table adapter. how to update a table adapter.
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Mar 10, 2010
In a table I�ve a bit field which is shown as a checkbox in datagridview (col 20). Once the dategridview is painted in my form, I�d like to save the checks made in the checkboxes. The following code is not updating my table but it�s not generating errors either.
For i = 0 To Me.DataGridView1.RowCount - 1
Dim data = Me.DataGridView1.Rows(i).Cells(20).Value
Dim sql As String
[Code]......
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Mar 11, 2010
I Use visual Basic 8.0 and Mysql 5.0 I have one Table1:
[Code]...
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]...
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Dec 28, 2009
I have written a Windows GUI ( using VB.NET) -> Which updates some values into MySQL DB through webrequests. During this process I am updating some richtext data into mysql DB. It is storing the data in the DB along with rich text tags. Is there any way to avoid them
HTML
<pre>{
tf1ansiansicpg1252deff0deflang1033{fonttbl{f0fnilfcharset0 Microsoft Sans Serif;}{f1fnilfcharset0 Times New Roman;}}
{colortbl ;
ed0green0lue0;
[Code]...
INSERT INTO {TARGET REGION}.(TARGET TABLE} ( SELECT * FROM {SOURCEREGION}.{SOURCE TABLE})How can I avoid the above problem. So that only actual content is updated in the DB instead of the data with richtext tags.
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Jun 13, 2012
My problem is with the tickets table, I have listed the user that created the ticket, the tech who will solve the ticket and a user that over sees the ticket. All three users reference the users table. So how do I can I query the tickets table and get all three users that reference the same table storing the users?
Table1: Tickets
1) Ticketnumber
2) EnteredBy User 100
3) Issue
[code]....
What I can do now is something like this:
Select Ticketnumber, EnteredBy, Issue, UserName FROM Tickets INNER JOIN Users
ON Tickets.EnteredBy = Users.UserID
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May 22, 2011
How can I update local dataset with mysql database without making duplicates. Assuming I set some column in mysql as primary key, which has unique string.
adapter.fill will just add duplicates, but adapter.clear before that is not an option.
So I want to update if the key column is the same with mysql data and if there is option for ignore adding new row.
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Jun 17, 2011
All i'm tring to do is connect to my MysQL database on my Local host and update a record in my "customers" Table. The Error i've been getting is under Public Sub DeactivateAccount,the MyCommand.ExecuteNonQuery() line of the code. The error is saying there is "no database selected". Below is the code i have.
Imports MySql.Data.MySqlClient
Public Class FinalFailedPinNumberAttempt
Dim connectionstring As String = "Server=localhost;user id=root;Password=;
[Code].....
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Apr 22, 2010
I am a bit of a newbie when it comes to vb.net and databases and I have a small favor to ask anyone I am looking for a very basic example on how to connect, read, update and insert data into remote mysql database. I have successfully connected to my database with the code below,, and for the moment I am just trying to LIST data from it in a listview control,, and then would like to find a way to insert data into it and update data.
Al examples I find on the net are too long and usually have too many unnecessary data around the code I need so I get a bit lost in it.Can anyone point me in the direction of SIMPLE examples that are easy to follow or provide a bit of useful code I could learn form.
[Code]...
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Dec 8, 2009
I'm trying to test some stuff out, like adding employees and stuff like that.
Now it used to run on an Access database, but I've made the jump to MySQL.
Now to add an employee I use this code
Private Sub btnOpslaanWerknemer_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnOpslaanWerknemer.Click
Try
[Code].....
now I get the following error: "Error: MySQL.Data - You have an error in your SQL syntax; check manual that corresponds with your MySQL server version for the right syntax to use near '?,?,?,?)' at line 1.
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Apr 19, 2010
I have been coding an application for a LeaderBoard for a game. I have all the Login sorted using Mysql and even have all the Account infomation displaying in lables etc. for account info form. Now I am trying to UPDATE information and this is how I was trying to do this...
Dim UpdateInfo As New MySqlDataAdapter
Dim mycommand As New MySqlCommand()
Dim mydata As MySqlDataReader
Dim query = "UPDATE Login SET Pword = '" + UpdateTxtBox.Text + "' WHERE Uname = " + Login.Uname
mycommand.Connection = conn
mycommand.CommandText = query
UpdateInfo.SelectCommand = mycommand
mydata = mycommand.ExecuteReader()
But comes back with an Error saying... Unknown column 'username here' in 'where clause'. Now the username is in the database as I have just logged in with it and I am taking it I have the Query wrong somewhere.
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May 5, 2012
I use a dbDataAdapter to populate a DataTable from an unlinked oracle database.I have a dbDataAdapter that I want to insert rows into an SQL Server table using SQLCommandBuilder.I have been trying all day to update the DataTable that references the SQL Server table with the data from the Oracle DataTable so that I can insert the rows.
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Oct 14, 2009
I am trying to create an application which after selecting a target folder updates the files that are inside to an access database. The first part of the code here works fine as it allows me to choose a destination folder, but when trying to get it to update the cotents to the database it will not work.
This then means that when using code for another button to search and display files stored in the updated table in a combo box there are no objects attached meaning it creates an error stsaing it cnnot find the object or path.
The code is below
Private Sub Button3_Click_1(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btDirectory.Click
' First create a FolderBrowserDialog object
[Code].....
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Mar 29, 2011
[code]...
Dataset table not updating The reason why everything ends in 1, is because I have another instance running with similar names... so disregard that.
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Nov 2, 2011
I have a form that is not updating. Just wondering if anyone can see an obvious error.
Private Sub SaveButton_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles SaveStoreButton.Click
Try
[code].....
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Aug 15, 2011
I have managed to sort out my date issue however although I have used the same code format on of my tables is not being updated and I am not getting any error msg so not sure why it will not work
this is my code cmd1 = conn.CreateCommand
cmd1.CommandText = "INSERT INTO tenant(t_id, firstName, lastName, email, phone, dob, rentPaid, rent, dateIn, deposit, service, rentDueDate, property, notes, existing) VALUES(@t_id, @firstName, @lastName, @Email, @phone, @dob, @rentPaid, @rent, @dateIn, @deposit, @service, @rentDueDate, @property, @notes, @existing)"
[Code]...
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Dec 4, 2009
I created a table in VB.NET by using a query which joins some tables. Then, I created a DataGridView to show the records of the result of this query. The toolbar has the buttons to add a new record and to delete a record. My problem is that I also need to update my database, and the button for the update in this case is disabled. How can I update my database?
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Mar 11, 2010
I am creating a project for myself to practice Database connectivity, updating, deleting and adding items. I am having an issue updating one of the tables i have added, within a table there is a column called Today's Date which will contain the date the last time the program ran, when i run the program i want it to update that column with the new date. [Code] When the code runs to 'da.Udate(ds, "Expenditure") I get the following error: Missing the DataColumn 'Asset Name' in the DataTable 'Expenditure' for the SourceColumn 'Asset Name'. The 'Asset Name' mentioned in the error is a column name but it is in my two other tables, why would it be reading them when I specify the table.
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Feb 18, 2010
[code] I want to update my table by using the textbox value with condtion. [code] The above query is showing error as "Conversion failed when converting the varchar value '23/02/2009' to data type int".
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Apr 10, 2011
I have a program that has a variety of pick lists updated via an WCF process. For most cases, the pick lists are VERY short. The process I used for the update is overly cautious.The table comes in, then for each row in the incoming table, the matching row in the target table is found, if there is one, and each field is compared. This works fine for those short lists. The whole thing is done on a background thread, anyways, as changes are pretty rare.
cmd.CommandText = "SELECT HydroID FROM GIS_Hydrography WHERE HydroID = " & dr("HydroID").ToString
rObj = cmd.ExecuteScalar
[code].....
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May 8, 2010
still having problems with mysql... im trying to find out how i can you a for each statement when getting data from mysql table...i have a table with IP and Port fields in... i want to get each and every one of the ip's and use it...for each ip in heat table and then run my "query()" function how can i do this in vb.net?... i can get ALL ips and ports and put in a gridview but would like to use the ip and display the Game Server Data that my query() function gets...this is from a while back when i made my Game Server Browser and just tryiong to make a better way of keeping my ip and port data and mysql seams to be the best way as its online and it can be added to and edited as and when needed and no one has to "redownload" anything?
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Mar 11, 2010
How to read per row in a table in mySQL as the database? i want each username when they login, they will go to their respective forms. Like for example, there are 3 users and each user have their different forms.h this.This is my code:
Dim conn As MySqlConnection
Dim myCommand As New MySqlCommand
Dim dr As MySqlDataReader
[code].....
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Aug 2, 2009
I have mysql connection for user to login, but I need to read some more information about the user, when he is actually logged in...
Code that I'm using for login:
Code:
rivate Sub OK_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles
[code].....
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Mar 31, 2009
This may seem like a simple problem, but I am completely baffled. I am working on a timekeeping application using Visual Basic 2008 Express and Access 2000.
There are three tables being updated by three separate sub routines. Two work fine, one does not.
In trying to resolve the issue I test one field at a time. The test Access query and the code only reference the one field to change and two ID fields. The program runs but the field is not updated. The table has 42 fields to be updated when I get it working.
The Access query is:
--------------------
UPDATE tPPSummary SET W1MonHours = [@W1MonHours]
WHERE EmployeeID=[@EmployeeID] AND PPID=[@PPID];
[Code]....
When I pause the running program at the intRowsAffected it shows 1 record which is correct.
I am really out of options as tho where to go from here. There are no simple spelling errors in the parameters, there are no error messages and the sub runs to the end.
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Feb 10, 2011
I am trying to update one table with results from another table as such:
Table A (field, type) : Table B
ID (key) Integer : ID (key) Integer
ParentID Integer : IssueID Integer
Number String : ParentID Integer
: Number String
I need to construct and UPDATE statement that does:
Sets B.IssueID = A.ID When B.ParentID = A.ParentID AND B.Number = A.Number AND B.IssueID = 0
Here is what I have so far but it is producing an SQL syntax error (missing operator)
sqlStr = "UPDATE B SET IssueID = A.id FROM B JOIN A ON (B.ParentID = A.ParentID AND B.Number = A.Number) WHERE B.IssueID = 0
I have also tried
sqlStr = "UPDATE B SET IssueID = A.id FROM B, A WHERE (B.ParentID = A.ParentID AND B.Number = A.Number AND B.IssueID = 0)
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Oct 4, 2011
I'm trying to progress my programming abilities by coding in Visual Basic forms. I've created a database and linked that to a VB form, I'm now coding a way to write into the database instead of reading.I'm filling an array which is in-turn put into the dataset row by row however when attempting to 'update' the table adapter I get the following error:
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May 19, 2011
I have a small problem I am using table LAB1 for printing as well as updating. In my program (Multi user) one user enters records into table Lab1 while another user is printing out bills. The data entry program and the bill printing program shares the same table LAB1.When they print bills it (program) messes it up as it brings up the data which is being entered by the data entry user.
[Code]...
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Jun 1, 2012
I have a datagrid that is loaded from a data source called ManualKanbanDataSet. The Access DB is ManualKanban, the table is "Parts". I've set the column properties of the column I want to change to readonly=false.
I make changes to the data in the datagrid, click my update button and nothing updates. here is the update
Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
Try
Me.Validate()
[code].....
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Apr 18, 2006
Honestly I do not understand why I need to write code to update a databse and why it stores it localy. I'd simply rather the system update the individual row after it is scrolled off of.
In either case since I guess I can't do that.
Here is some code in a button on a form
Try
ItemsTableAdapter.Update(NewCreationsDataSet1.Items)
LineCodeTableAdapter.Update(NewCreationsDataSet1.LineCode)
Catch ex As Exception
[Code].....
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