I have been told that the best way to do a search in VB is to fill an array with ALL the records from a table in a database and then filter the records from the array, instead of using the SQL statement Where.
View 25 RepliesI need to fill an array with whole column from database table, so i have used reader to read the values from that column, but can not figure out how to put them into array (code below doesn't work) [Code]
View 3 RepliesI am woking on an application in which records of a table are stored in another table. In case of duplicate records they will not wriiten to the table and they should be written in a log file.
View 1 RepliesI want to fill an Array and list box from a table, with ALL of the records.
I DONT want to use Displaymember. Like shown below...
CODE:
This is the code so far, but it is only filling with the first record.
CODE:
I have 2 databases that I am working with. One is a compant customer database and the other is my personal call log. Now I am creating a front end for the Call Log. I was updating my customer list by Importing 2 tables from the customer database, a series of queries would erase all of my info, take all the data from the imported tables and move it into mine then erase the imported tables.
Im trying to accomplish the same in my VB frontend. I can connect and fill datasets from the customer database. I can erase my tables. How do I take all of this data from the newly created dataset and move it over to my empty tables?
[Code]...
Is it possible to fill a Combo Box with the names of the fields of a table(from a database)?
View 6 RepliesIn order to avoid clashes between drivers in my taxi system I want to be able to choose available drivers when filling out the booking form. In order to do this I needed to:
Select all records in "column" from "tableA" which are not in "column" in "tableB".
I have this:
Private Sub BookingFillDriverComboBox()
con = New OleDbConnection("Provider=Microsoft.ACE.OLEDB.12.0;Data Source=D:My DropboxDocumentsTaxi Service ProjectDatabaseTaxiProjectDatabase.accdb;")
con.Open()
[Code] .....
i'm having problem saving my records into database here's my code
[Code]...
I've found a sql string like: "SELECT Count(*) FROM table"My question is: how can I use this string and get the result into a variable in VB2010? I used to program with VB6 for years, but now things are very different.
View 1 RepliesI have a form in which I am updating records to table Users in database China.accb. The btnClick sub successfully updates the Dataset. However, the actual table Users never gets the update. What am I doing wrong? The code is below.
[Code]...
I'm trying to use a DataGridView Control to Add/Edit/Delete records in a simple database
table.I used the wizard to create the datagridview and it created a dataset a bindingsource
and a tableadaptor.When i run my project, data that is in the database table is displayed
correctly, but I can't add/edit/delete. What events/actions do I need to perform to add
these capabilities?
I have a database with 3 tables: Student, Unavailability and Duty.The fields for Student are entered in a form I have. One of the fields in Unavailability is filled by a form, the other fields are an autonumber and a foreign key to the Student table.ow I want records in the Duty table to be created and automatically filled in depending on what the values of the fields are in the Student table.For example, If the Boarder field in the Student table is 'yes' then I want the Duty Number field in the Duty table to be '1', '3' and '4'. If it is 'no' then I want the value to be '2' and '5'. I recognize it will have to create several different records to incorporate the different duty numbers for each StudentID. Obviously this will require an if statement, however this is my first time implementing a database with my limited experience with programming and Visual Basic, so I don't know how to refer to the specific fields in a table and set the value of other fields depending on the data in other fields.
View 6 RepliesI have a simple Windows Service that reads from an Excel spreadsheet and imports the records into a SQL Server 2000 database table. Before it loads it checks if the file has been successfully imported before (using filename) and whether any of the records in the file have been imported before (using primary key). If these checks are ok I load the records into a datatable and then update the datatable to the database.
However, I need to do this in a transaction as I want to ignore the whole file if there is an error. The file goes to a discarded folder and the user gets an email with why the import failed. (This is likely to be because the store the record is for is not yet added to the database and the referential intergrity of the db fails). If there is no transaction the records before the failure record are imported. When the file is imported again (the store has been added to store table) the file is then rejected because duplicate records are already in the db.
Heres my code:
[CODE]...
I have this piece of code wich works perfectly when inserting records into one table using records from another table. My question is that now i need to create another table by using records from 3 other tables (tables are related). Can i use aliases on the column names, like on Oracle SqlPlus? How will be the syntax of the 'INSERT INTO SQL statement?
Dim MyConn As ADODB.Connection
Dim MyRecSet As ADODB.Recordset
Dim tmpSQL As String
MyConn = New ADODB.Connection
[code]....
I am looking to create one of these search engines with autofill function. I want to find the records and fill the datagrid with them from the database where combAC.text is like ...
I got this, but at the moment it doesn't find any records.
Private Sub combAC_Leave(ByVal sender As Object, ByVal e As System.EventArgs) Handles combAC.Leave
If combAC.Text.Length <> 0 Then
[Code].....
I do this in Oracle databases just in a snap, but now I have to do it in VB using ADODB and I don't know how to do it.
I have two Access 2007 tables. Table A contains: Col1 (text), Col2 (text), Col3(date), Col4(amount), Col5(text)
Table B contains Col1(date), Col2(amount) What I need to do is to insert into table B the records of table A (col4 summed) grouped by date of table A. The date is a variable contained in a text box so it cannot be hardcoded into the SQL statement.
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]
View 4 RepliesI try to fill up a data grid view with records of two related tables. Beneath you can find the code I use to handle this.
The first table �GemeentenT� has the following columns.
GemeenteId Primary key
GemeentePostnummer
GemeenteNaam
[Code].....
how to get records into oracle database delete from db & update the records i have successfully connected my vb 2008 win form with oracle 10g.
View 1 Replies[Code] my issue is that now i need two cases, first i need a query that will return the date created and modified of the table and i also need to know if its possible to query a list of table names in the database ordered by date created but that have a certain thing in their names. for example the database contains the following tables: [Code] and what i need the query to return is the tables that contain "Data", settings and employees are for the other functions of the program. so the query should return the 4 data tables in order of date created. but i have no idea how to go about doing that in the query, does anyone know how this is done?
View 6 Repliesjust wondering how do i transfer table's records to another table??i'm wondering where do i put the queries, or am i gonna put it in my stored proc?
View 3 RepliesI have a datagridview which I have set up with the Form Designer and created 2 columns and set header names and column widths. When I try and fill the datgridview instead of filling the columns I have created two additional columns are appended to the right of the existing ones and the additional ones are populated leaving thje ones I created blank.[code]...
View 7 RepliesI am having a remote server it has INVENTORY DATABSE , and also iam having same databse in my local system. I want to populate by local database table with my Remote database table through Vb.net code by click a button. How to do this .
View 1 RepliesIs there an easy way to get data from a table in SQL Express and put it into a Structure? The table has one string column and five bit columns. I'm using VB.net
View 13 RepliesI am creating a form for entering technical data about a part into an Access database. In the same form I have several ComboBoxs that need to have their lists filled from the same reference table in my database. I have a number and unit field for the twist and bending radius properties. I made the unit fields ComboBoxes and I am trying to bind them to referance table in my database called UnitsLength. The relevant structure is as follows....
Form: NewPartForm
Database: CableDataSet
Main Table: PartMechanical - with fields: TwistNom, TwistUnits, BendingRadiusNom, BendingRadiusUnits
Reference Table: UnitsLength - with fields: Unit, Shorthand, Conversion Factor
First tired the following settings....
Data Source: Other Data Sources > NewPartForm List Instances > CableDatase
Display Member: UnitsLength.Shorthand
Value Member: UnitsLength.Unit
SelectedValue: PartMechanicalBindingSource > [The associated unit field]
But the lists didn't populate.... Then I tried these settings
Data Source: UnitsLengthBindingSource
Display Member: Shorthand
Value Member: Unit
SelectedValue: PartMechanicalBindingSource > [The associated unit field]
But now every ComboBox displays the same value but still stores the data in the proper field... it just sets them all the same.
I have a data table with query inside, then i need to sent value of data table exactly in datagridview i made before.
View 6 RepliesCan someone tell me what's wrong here: Dim sql As String = "SELECT * FROM courses" Dim con As New MySqlConnection Dim dt As New DataTable(sql) Dim cmd As New MySqlCommand(sql, con)
con.Open() ComboBox1.Items.Add(dt)It doesn't show the courses.
I'm trying to set up a form that I can use to sort names. What I've done is set up a table with with the persons name and info in it as well as one field for a platoon number, and my form is basically 5 listboxes. I want unsorted names to appear in the first box, and sorted names to appear in their coresponding listbox (based on the platoon number in the table). I set up a query through the wizard (from the listbox itself) that will pull the info that I want, but so far it seems to pull it to all the listboxes rather than just the one I want.So far I've figured out how to make the listboxes fill on form load or on a button click (though in both cases all the listboxes are filled with the same data).Eventually I'd like to be able to sort these names in the various listboxes by dragging and dropping, but one thing at a time.So:1. Am I going about this from the right angle or am I making this needlessly complicated?2. How can I get this to sort the data to the correct listboxes on formload?
View 1 RepliesI am trying to move through a list "TodaysCard" and print the TimeOfDay.ToString into the first column of every row and to only create the amount of rows that are needed. But am a bit of a novice when it comes to this and can only get it to display the TimeOfDay.ToString value for the first item in the list over and over again. Just wondering how I can get it to iterate through each item properly.
For Each Race In TodaysCard
With (Race)
Try
[Code].....
I am new in forum and in VB 2008 as well, I have a little background in VB6 I am making a program for a project and I need to calculate some mathematical formulas and the results I want to send them in an external device via serial port. To be more specific I have a function, like y(x)=a*x+y0. I get the starting and ending x and y from textbox and I calculate the respective y but I want to store each x and the resulting y(x) in order to send them after the completion of the complete calculation to the serial port.I have tried with datagrid view and dataset but I cannot fill the tables with the results.Does anyone have any idea what I can do.
View 1 Replies