VS 2010 : Adding And Deleting Records In The Database?
Aug 8, 2011
I have records in my datagridview (from database(ms sql server 2008 r2)). What i want to do is to insert the records selected by my datagridview checkboxcolumn and IF POSSIBLE automatically delete a record if the records to be inserted are equal to the records inside the database. (Hoping you got what I want to say.) For example. I have an A,B,C(child) that is under XXX(parent) in my database and I'll be inserting the A,B(child) again but it will be under YYY(parent). The old record in XXX will be deleted except C. I just want a possible DELETE STATEMENT These are what I've done so Far :
Insertion of record to database
Try
connectionString = "Data Source=***;"
sql_connection = New SqlConnection(connectionString)
[code].....
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Apr 27, 2011
I have a form with textbox controls that are bound to the database. I have a bindingnavigator within the form, when i use the save & delete buttons on the bindingnavigator toolbar they seem to work but when i check my db nothing has changed. I have tried to work around this problem by updating the saveitem code using the code below.[code]
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Feb 12, 2012
My project involves making a table database that displays student number, surname, first name, homeroom, and grade avg. Through SQL commands, there must be functions to add, update, delete, search by field, and save records to the database.I have already set the database up just fine and displayed it in a DataGridView. Through the DataGridView, I was able to go to the "Add Query" area, and I successfully made the queries necessary for searching by field. However, when I try to do anything other than a search using the query builder (ie start my SQL command with INSERT INTO or DELETE FROM), I ultimately get the message "Failed to get schema for this query"For example, this SQL code (to add an entry to the database) worked when I was in the Query Builder (and the entry that it made is still in the database), but when I finally tried to confirm it, I got the "Failed to get schema for this query" message.Being unable to add entries to the database this way, I tried to do it with textboxes on a form. Each textbox will have one of the fields, and at the click of a button, they would be put into the table. My code is below. I do not know what is wrong withit. When I run it, my fields do not appear on the DataGridView immediately, but I must run the program again to see it. The time after, the entry is gone. So I am not sure how exactly such entries are to be saved.
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Try
[code].....
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Dec 14, 2010
I read the other threads but i didn`t understood and none of the codes worked.I`m using VB 2005 and SQL Server 2005. I have 1 form with a DataGridView bounded to the table Produse and 3 texboxes and 1 Save button.
In the save button i`ve putted the code :
Using con As New SqlConnection("Data Source=.SQLEXPRESS;AttachDbFilename=H:ProjectsWindowsApplication1WindowsApplication1Database1.mdf;Integrated Security=True;Connect Timeout=30;User Instance=True")
Try
[Code]...
The code works fine , it saves the data i`ve enterd in the textboxes , but in order to view the changes in the table i need to restart my application to see the changes.
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Apr 7, 2012
I'm adding records to my table which works fine. However, when I want to add a lot of records it takes some time and it looks like nothing is happening. I want to add a progressbar to show the progress.
For Each dgvrow As DataGridViewRow In mydgv.Rows
progress.Maximum = mydgv.Rows.Count
Dim cmd_save As New MySqlCommand("INSERT INTO ....etc", conn)
[code].....
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Jun 21, 2011
I am not able to add records in an Access 2007 database using VB 2010 Express Edition. I have read other posts and followed them but still I am not sucessful. I have the connection to the access database as MS Access Database, therefore it has the OLEDB connection (not the Jet 4.0). I am using the project instance in binding the text boxes to the fieldnames in the Access database. Did I miss something? I am also using Windows Vista Ultimate.
Below is the code.
Private
Sub
cmd_Save_Click(ByVal
sender As
[code]....
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Jan 15, 2011
now i got a problem deleting records in the database
this is my code
Dim myConnection As SqlConnection
Dim myCommand As SqlCommand
[code].....
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Feb 28, 2012
I am making a program that takes Access records and moves them into MySQL then checks to be sure everything is right and deletes the moved records. But, for some reason my delete command isnt working....
Here is the
Dim deleteCommandF As New OleDbCommand
Dim deleteCommandE As New OleDbCommand
Dim deleteCommandO As New OleDbCommand
[code]....
Running the program now to get the exact error message, shouldnt be more than 5 minutes and I'll post it.It says my paremeters are wrong? deleteCommandE.ExecuteNonQuery()
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Apr 6, 2010
I used the wizard to create a datagridview and then binded a grid to an access table.Data show up fine..But I can't dete records via the bindingnavigator.Hit the delete button then hit the save button ?Data does not get updated in the backend database.My properties are set to true for adding and deleting.
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Aug 29, 2008
I need help with adding a record to a database.I have a database with multiple tables. How do I add a new record to one of the tables without using the BindingNavigator.Lets say the table's name is tblDetails and the fields are:NameSurnameCellAddressI have a number of text boxes on my form:txtNametxtSurnametxtCelltxtAddressI want to add the details from the text files to the table and a new record.
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May 15, 2011
I have been trying for a month to get a row added to an Access database and can not do it. I have the databindings all set and can select different records, but can not add a new one. I have tried BindingSource.AddNew.row() but can't figure out how to add data to the new row, nor does it show in the database.
I have tried
Dim ds As New myDataSet '<---Change this to the dataset name on your form
Dim dr As DataRow
dr = ds.Tables("Students").NewRow
[Code].....
But that doesn't do anything at all. No data added, no errors. I have tried updating a datagrid to be told it can't be updated when bound. I look on google and nothing seems to relate to adding data to an access database when bound to the project through the datasource wizard.
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Aug 19, 2011
I have the following code which I hoped added a row to my DataGridView and also a record to my database. It does the first part, but not the second.
Dim row As DataRow = Me.CCLogDataSet.tblLog.NewRow()
row("cc_log_contract") = Me.txt_Log_Add_Contract.Text
row("cc_log_registration") = Me.mtb_Log_Add_Registration.Text.ToUpper()
row("cc_log_milage") = Me.txt_Log_Add_Milage.Text
[Code] .....
It seems to be storing the data in memory? As the data in the DataGridView is persistant, even after a Relaunch of the application. However, why I query the database, there are no records in it.
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Dec 17, 2011
I'm trying to add a record through access. Below is my code. My problem is that when I add a new record, it adds to the database fine, and goes back to the first record like it should, but when I then scroll through using the BtnNext (button), it replaces the last record with the first record for some reason. This is the UI of it [URL]. A bit of further explanation, I'll have 3 records, IDs 1,2,3 respectively. I go to add another (with its ID as 4). When it's added, the program displays ID 1 as it should. It then goes 2 then 3, but instead of 4 as the next one, it displays 1 again. So 1231.
Here's the
Public Class ViewStudent
Dim con As New OleDb.OleDbConnection
Dim dbProvider As String
Dim dbSource As String
Dim ds As New DataSet
[Code] .....
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May 6, 2009
I am using OLEDBConnection and OLEDBDataAdapter and connected to the MS-Access databasehow can i add the textbox value to the table in database on a button click and want to display it in datagridview??
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Dec 20, 2009
I am developing an application in vb and access my sql query in access please have a look.
str = "insert into details values('" & username & "','" & CDate(date1) & "','" & time & "','" & PrinterName & "','" & noofpages & "','" & _
Message.ToString & "') WHERE not exists (select * from details where Date1 = " & CDate(date1) & " And Time = '" & time & "')"
I was trying to check the database before adding the records For some reason its not working Query input must contain at least one table or query Is exists allowed in access or is there any other keywords in access?
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Apr 17, 2010
I am working on creating a program that records animal data (wombats) and stores it into a database, using vb.net. I am trying to add new records into a database but every time I click add, to execute that, there are duplicate records that gets added. How do i write the code so itonly adds it one time. I am using a data reader. Here is the
[Code]...
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Mar 10, 2012
I have used this form to add new records on my database(ms access) in my database I have a column name 'ID' which is my primary key 'ID' is set as auto number. Now I am having a trouble on creating my update and delete button it's always saying "cannot be delete/update"
Here's my code on add, update and delete
Public Sub SaveRecord()
Try
Dim dbConn As OleDbConnection
Dim dbInsert As New OleDbCommand
Dim str1, str2, str3, str4, str5, str6, str7, str8, str9 As String
[Code] .....
Note my add is working perfectly fine. I just can find the error on my delete and update. Also I have used this to view it to my datagrid I don't know if its the right thing but it's working fine too.
'declared dbpath globally'
Dim dbPath As String = "Provider=Microsoft.Jet.Oledb.4.0; Data Source=../VG.mdb;Persist Security Info=False"
[Code] .....
Another thing is how to code each textbox and combobox to bind it to my records so that when I click on the datagridview each column will be distributed on each respective textbox.
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Oct 5, 2011
The apostrophe is used to separate data when adding records to an Access Database data table using the "INSERT INTO" SQL statement. Having apostrophes in the data really screws things up with this new software. Is there a simple workaround? Is it possible to specify a different character? Is it possible to add data without using SQL Statements? I also noticed that the new OleDbDataAdapter Add Method generates the same SQL Error because it apparently creates an "INSERT INTO" SQL Statement.gh
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May 20, 2010
I'm loading my listview with records from a mySQL Table, which works great. But I'm having issues when I try to add records to another listview according the selected row in the first listview.
vb.net
Dim mysqlDataComm As New MySqlCommand("SELECT jan, feb, mrt, apr, mei, jun, jul, aug, sep, okt, nov, dec FROM data_table WHERE datum ='" & frm_main.Listview1.SelectedItems(0).SubItems(1).Text & "'", mysqlConn)Dim mysqlReader As MySqlDataReaderTrymysqlConn.Open() With frm_main.lstv_data.Items.Clear() mysqlReader = mysqlDataComm.ExecuteReader While mysqlReader.ReadDim lvi2 As New
[code]....
It works until ".Items.Clear()"... after that nothing happens and I really don't know what I'm doing wrong. No error, whatever.
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Sep 12, 2010
i have learned VB 6.0 a few years back, but started out in .NET with this one..Everything went pretty good, until now! I want to write my data from the application to my Access database (Frituur1).i have tried with several methods1:this takes place in my Module1:
Dim newJournaalRow As Frituur1DataSet.JournaalRow
newJournaalRow = frmindex.Frituur1DataSet.Journaal.NewJournaalRow()
newJournaalRow.btw6 = btw6
[code].....
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Dec 6, 2011
Dim Conx As String
Dim DBx As String
Conx = "Provider=Microsoft.ACE.OLEDB.12.0; "
[Code]....
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Jun 6, 2011
I have created a form called new users, I have added my data source, draged over the objects I want from the dataset onto the form and all is well appart from the fact that I cant delete records.
To add them I simply click the add button, put in my info and then click the little disk button to update the dataset.This does not work for the delete button though, instead I get the following error
UPDATE REQUIRES A VALID DELETE COMMAND WHEN PASSED DATA ROW COLLECTION WITH DELETED ROWS.
[Code]...
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Jun 4, 2010
How to delete a selected row from Datagrid.I have provided a delete button. I tried the following code, but don't know where it is going wrong.
CODE:
I think, problem is in this line:
CODE:
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Mar 13, 2012
Just wondering how to delete a selected record from a .dat file
I am new to programming so go easy
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Apr 25, 2011
I can't figure out whats the best code for deleting a record from the database using combobox in VB.Net. the navigation of my combobox works fine.. when i click the dropdownlist of my combobox and select another name, the selected row on my grid also displays records the same as what is seen in my navigation boxes.... but the problem is when i am going to delete the records.
Here's a photo of my sample program :
The selected row on my grid is the records that i am going to delete.
Here is the photo after clicking the delete button. It delete the entire selected rows except the selected column Name, instead the first row column "Name" record is deleted and the second row column "Name" replace to it.
Here is the code for my delete button:
Private Sub Button1_Click_1(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Me.TblCreditBindingSource.RemoveCurrent()
[Code].....
I dont know what's the process of deleting should i do..
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Dec 4, 2009
I have a file with information about people, and use the following code to show the contents ofthe file in a list box..
[Code]...
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Jun 17, 2012
I am getting the attached error while updating or deleting the records. [code]...
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Jun 9, 2011
i have a listview with few records im able to delete the records from the listview but after deleting the record the listview is not getting refreshed [Code]
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Jun 19, 2011
I'm having a problem with editing records in my DataSet. When adding a record to the database, I have a button that adds to the binding source
[code]...
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Dec 16, 2011
I am displaying Access database records on my form and need to be able to printpreview only the first 3 records of the database and have no idea how to code this at all. Also the printpreview is has to be on a separate form than the displayed records.
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