VS 2010 OleDB Updating Multiple Records With Calculated Values
May 23, 2012
I'm writing a time entry program to record when an employee checks in and when they check out.I'm struggling on the part where I need to calculate a time span (time out / time in). I am selecting the In Time, Out Time, and Total columns.I want it to take the Out Time subtract it from the In Time and place that value in the Total column.I have so far and have tried several variations of different updates but have had no luck.[code]I keep getting a syntax error in the UPDATE statment.I'm not very fluent with OleDB yet and I'm not sure if I'm doing the update correctly.I have no problem with OleDB and single UPDATES or single field updates but when I am updating multiple rows with different values.
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Jul 28, 2010
I was trying to edit and update an existing record in my database. I am getting an error, my code is here:
Editing Records
Private Sub btnEdit_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnEdit.Click
Dim qry As String
[code]....
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May 1, 2009
I am trying to update a link table with values from multiple datagrids, the field types in the link table are numbers and the value selected from the datagrids are also numbers. I am getting the following error:
The OleDbParameterCollection only accepts non-null OleDbParameter type objects, not String objects.
In line : cmdCompany.Parameters.Add("@COMPANY_ID")
Dim ConnectionString As String = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=|DataDirectory|aop29.mdb"
Dim cmdCompany As OleDbCommand
Dim cmdReceiver As OleDbCommand
Dim CompanySQL As String
[Code] .....
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Mar 8, 2011
I am attempting to teach myself visual basic and I cannot figure out how to send a calculated value (on a button click) into a one-dimension array and then recall the last five values in a message box when the user exits.
Here's what I have:
Public Class frmInvoiceTotal
Dim totals(4) As Decimal
Private Sub btnCalculate_Click(ByVal sender As System.Object,
[Code]....
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Apr 16, 2010
I am unable to load the dat into the data Grid. Here is where I keep getting stuck.
dgvOleDb1 = table.Select
dgvOleDb1.DataSource = DataGridViewEditMode.EditProgrammatically
dgvOleDb1.DataSource = ds.Tables(0)
I am confused; I am using VB2010, IBM.iSeries.DB2 on an as400 V5R4. I am trying to establish an OLEDB connection, and return the values from the selected table to a DataGridView. I had one of the admin's make me file named GARBAGE, in the Rprtaccess catalog. In the past, I have been able to connect via access and an ODBC connection. My project is too big for access, and the SQL middleware we have is clunky and not user friendly. This is a program that will generate the SQL statements, specifically the WHERE: clause and populate the datagrid with the selected criteria. In essence I am making a user friendly striped down program, that has variables that are manipulated by the end user, and the rest, referenced tables and libraries are coded.
Imports System.Data.OleDb
Imports System.Exception
Public Class Form11
[code]....
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Mar 22, 2011
I am working with a future value application and I am trying to display the calculated future values in a listbox. For instance, I input the monthly investment, the yearly interest rate and the number of years into textboxes and I want the application to list out the future value for each year until the number of years in which I entered is reached. I cannot figure out how to get the code to display the value after each year. I am trying to use the "mod" operator to display the value each time the 12th month comes around.[code]...
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Apr 19, 2011
ive been struggling on this portion of my code for almost 3 days with no luck. i have a database containing a list of transactions (in this case, the product name, quantity and date of sale). I want to plot a graph for each product showing the amount sold each month for the past 12 months. The functions to calculate these values are working fine. but my problem is this:
each tab page is named after the product name:
TabControl_SaleOfProducts.TabPages.Add(
"TabPage_"
& ProductName, Item)
and then to this tab page i want to add the graph. but i cannot reference the newly created tab page?
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May 17, 2006
I can retrieve records from my Database fine, but I'm having trouble updating records. I am getting a syntax error on [code] I get this error when I change the Last Name (Row 0, Column 1). [code]
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Apr 3, 2012
I'm trying to learn vb .net. Below is my code, and all I want to do is display the calculated results in a summary. Whether it be a message box or a different form it really doesn't matter.
Public Class Form1
'Global Declarations.
Const STEREOSYSTEM_Decimal As Decimal = 425.76D
Const LEATHERINTIERIOR_Decimal As Decimal = 987.41D
Const COMPUTERNAVIGATION_Decimal As Decimal = 1741.23D
[Code] .....
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Jun 15, 2012
I know this is basic, but my mind is totally blanc. I'm trying to retrieve all records from a table with a specific code.
Dim cmd As New MySqlCommand("SELECT myValueRow FROM myTable WHERE searchRow = 'test'", myconnection)
myreader = cm.executereader
[Code]...
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Mar 15, 2012
I've been searching all day about this and can't find a solution..I'm fairly new to VB and SQL Queries, so I apologize if I sound a little daft.Basically I'm working on a project in VB 2010 where a user can add new teams, players, also create matches between teams and record the score. I have done nearly all forms, but now I need to show data from 2 tables on one form and the method I used for 1 table doesn't work.I have 4 tables:team, player, match & matchdata and they are linked like this:
[Code]...
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Jun 28, 2010
I have a database (SQL Server 2008) with multiple tables and records. 1 Table contains all kinds of invoice items, which have a unique id, Client ID and invoice number.
My goals is as following:
- I want to show the invoice items in an datagrid, all merged as 1 invoice item (showing date, total without VAT, total with VAT, VAT percentage, VAT value and if the invoice has been paid or not.)
- The datagrid should only contain the invoices for a specific client.
- Should add up totals (Amount paid, Amount not paid, Amount Overdue, Total Amount)
- Should be withing specific date range.
Everything in this table has been saved as varchar except invoice id and unique.
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Aug 20, 2010
I've been using Visual FoxPro for the past 10 years, and am trying to learn VB.NET, (using VS 2008). I am in the process of re-writing a small VFP app in VB.NET, and am using the VFP DBF tables, (via OleDb). It is a real struggle for me to comprehend all the levels to keep track of and was wondering in anyone knows of some sample code that would point me in the right direction. After I complete this small app re-write, I have others to do that all require the VFP DBF table updates.
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Nov 6, 2009
I have an application to re-sequence some items based on a an alphabetical ordering of the items from another table. I couldn't create an update statement to update the database when I pulled the information by a join query, So I pulled down both tables into a dataset with an XML Schema description where the two are related by the itm_id key as in the database. I then have two datagrids one with the items and one with the bound to the relationship this allows only the records associated with the itm to be displayed in the datagrid, I then run a loop that changes to sequence number for each corresponding record,this all works fine but then I go to update the back end database.
The update from the dataadapter executes successfully, but then if I reload the dataset from the database back end I find that the update did not actually update the records on the back end. The only record that was updated was the very first record which updated with a 0 then all the others did not take, I have re-run it several times and they will not take.
Me.Cursor = cursors.WaitCursor
odbaCatItem.MissingSchemaAction = MissingSchemaAction.AddWithKey
odbaCatItem.SelectCommand = odbsCatItem
[code].....
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Jan 10, 2010
I'm having trouble getting a datagridview to update into an access db.Here's the code, from what testing I have done it is telling me that there are no rows in the datagridview (datagridview1.rowcount returns 0) when I can visibly see that there are many rows:
[Code]...
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Jul 4, 2009
Editting and Updating Access with OleDb commands. VB9
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Feb 17, 2011
My program is databound to an access 2007 database. I have a datagridview showing rows as part of my screen and the other part of my screen is texboxes bound to a different table.What I currently have:
1. Date in textbox from one table
2. Age in Datagridview column from another table
I need help with having a calculated date column in the datagridview that will be the textbox date + age (in days) in the datagrid column. I would also need this column to store in my database like any other field also. So if I typed in 2/17/11 into the textbox, and I typed in 2 in the age field, the calculated field would display and store 2/19/2011 in my datagrid and database. My dataset designer won't let me add a date to a string so I'm completely lost. A query calculates it easy in access but when I load the access query in my dataset it doesn't calculate anymore.
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Aug 1, 2010
i have a combobox and wish to assign multiple values if possible, eg is i select WESTERN EUROPE i would like the values to be: western europe OR western-europe AND Generic as the combobox is used to search for these strings within a listview (which is working fine for the combobox1.text but the listview sometimes has "western Europe" as "western-europe" and does not find it.
[Code]....
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Apr 26, 2011
I am trying to make a message box display evens from textbox1 (being the user's low input) to textbox2 (being the user's high input). I currently have it displaying the correct numbers for evens, but they are appearing it separate message boxes. I need them all to be displayed in the same message box.i.e. Textbox1 = 1 , Textbox2 = 7 MessageBox = 2 4 6...Also, I have to do the evens in a Do While loop and the odds in a Do Until loop.
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Dec 8, 2011
I f I have 1 combobox then my SQL query will be:
Dim objConnection As New OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0;Data Source = C:DB.mdb;Jet OLEDB:Database Password=Pass1;")
Dim objdataadapter As New OleDbDataAdapter("SELECT DISTINCT LOCATION FROM Table", objConnection)
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Jun 12, 2011
As part of the application I'm writing in Visual Basic, I have written code to display records in text boxes and cycle through each of them one record at a time. I'm having trouble getting the code I've written to update records to work however. I am new to this however, so I'm sure I've made an obviously glaring error that you more experienced people can point out for me:
Public Class frmRecords
' VARIABLES TO AID NAVIGATION THROUGH RECORDS
Dim moverow As Integer
[code]....
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Feb 10, 2006
Erm I am still a freshman who still learning Visual Basic and I'm currently facing a problem regarding adding a new record and updating my database records in the form, or the whole project.
If MessageBox.Show("Do you want to save the data?", "", MessageBoxButtons.YesNo) = DialogResult.Yes Then
Me.ArtistsBindingSource.AddNew()
[code].....
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May 1, 2009
I am trying to update a link table with values from multiple datagrids, the field types in the link table are numbers and the value selected from the datagrids are also numbers.
I am getting the following error:
The OleDbParameterCollection only accepts non-null OleDbParameter type objects, not String objects.
In line : cmdCompany.Parameters.Add("@COMPANY_ID")
[Code].....
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Sep 25, 2010
In VB6 you can debug.print multiple values from a loop to a single line by simply adding the ";" or "," chars.
[Code]...
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Jul 26, 2009
I have ALWAYS used the SQLDataSource to update my records in my SQL Server 2005 database, so i am not really sure how this would be done in normal code. I am using VB.NET but if you are a C# developer and want to show me some code that is more than welcome as well.
I am using ASP.NET 3.5.My user will see a page with 5 Text boxes with their contact details in. Those details I will get from a SQL Server DB and when they go and change the text in the text box and click submit, it must then save the changes.
This is very easy with the SQLDataSource but how can i code this myself?
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Jun 17, 2012
I am getting the attached error while updating or deleting the records. [code]...
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May 8, 2009
I am trying to update a databse using a grid control, I've enetered multiple rows in the row and tried to save the data, unfortunately I'm only saving the last row entered, is there a way to save all the rows entered using this approach?
Dim ConnectionString As String = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=|DataDirectory|aop29.mdb"
Dim objConnection As New OleDb.OleDbConnection(ConnectionString)
Dim sql As String = "Select * from Customer"
Dim daaop5 As New OleDb.OleDbDataAdapter(sql, objConnection)
Dim ds As New DataSet()
[Code] .....
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May 8, 2009
I am trying to update a databse using a grid control, I've entered multiple rows in the row and tried to save the data, unfortunately I'm only saving the last row entered, is there a way to save all the rows entered using this approach?
Code:
Dim ConnectionString As String = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=/DataDirectory/aop29.mdb" Dim objConnection As New
[code]......
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Sep 5, 2011
i have made a database windows forms application, i can add records, when i add a record , fill out a few fields then save it saves OK but if i then change some fields data then try to re-save i get a error: object reference not set to an instance of an object.
the code that is highlighted is:
Private Function GetRowData(ByVal custRow As calllogDataSet.CALLLOGRow,
ByVal RowVersion As Data.DataRowVersion) As String
Dim rowData As String = ""
[Code]....
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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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