i have some difficulty in displaying records from database to my combobox here is my code in the form_load
Private Sub Form5_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
Dim con As New SqlConnection
con.ConnectionString = "Data Source=.SQLEXPRESS;AttachDbFilename=C:UserslitoDocumentsQMP_DB.mdf;Integrated Security=True;Connect Timeout=30;User Instance=True"
[code]....
me with an example of how to display data (some text) in a combobox?
View 13 RepliesDim cn As New OleDbConnection
Dim sql As String
Dim da As OleDbDataAdapter
[code].....
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 Replieshow 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 RepliesI 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..
I know how to display a records to my combobox from my database but right now I am ran out of idea on how I will display a teacher who has a teaching load in elementary and high school.. I have DEPT field which I has either ELEM or HS. What would be the best thing to solve this kind of problem?
I have two option buttons labeled "HS" and "ELEM". I would like that if any of the option button is selected the name of the teachers who are handling elementary ang highschool will appear in the combobox.
On formload I checked the value of the option button and assign either "HS" or "ELEM" like [code]...
I have a form with controls on it which are binded to a table, I have records selecters and so on... Just a simple display and edit form(yes I also want to be able to edit them so...) I created this form just by dragging items from the Data sources window.
Now I want to add a combobox which has a list of titles. And here comes the difficult part: When I select a title in the combobox, all the other controls show the matching info(matching to the title), in other words the datatable which is attached/binded to the controls must move to the right record. I have added a query to the combobox , which has two columns: ID and Title. the displaymember is Title and the Valuemember is ID. So I must look in the datatable for the right ID.
I currently have a sql database linked to vb.net and I'm populating the comboboxes using SELECT statements. However, I'm getting duplicate records in the comboboxes.I have my database setup as 1 project to many submittals and 1 submittal to many items.
I have 3 projects in my sample dataset and I'll recieve 3 duplicate submittals and 3 duplicate items.
If I have 6 projects in my sample dataset than I'll get 6 duplicate submittals and 6 duplicate items.
I've tried adding distinct to my SQL statement, but that didn't do anything. Is there any reason why its showing as many duplicates as I have projects?
I'm trying to read the records into a combobox from the database without any success. There is no problem with the connection, but something seems wrong with my coding. Perhaps someone could tell me what I'm doing wrong.
[code]...
For Each row In dsdataset.Tables("TParcelDelivery").Rows
[Code]...
Well that's the code am using but am kind stuck i want to select all records in the database where i select the month from a combo-box control it displays the records of that given month.the code above can be able to populate all records in the month of may(in a list-view control) how do i go bout that?hoping you'll get back to me ASAP am doing ma final project in college which am presenting in two days time. as part of the requirement the system should be able to populate managerial reports.(Say Monthly,Daily And annual).
How do I display the concatenated records in my combobox? I have the following codes
Private Sub frmAssignSubjects_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
If cnn.State = ConnectionState.Closed Then cnn.Open()
If rdoHS.Checked = True Then
[code].....
What should I put in the DisplayMember and ValueMember? If I will not concatenation, I just use "LastName" and "IDNO" in my DisplayMember and ValueMember respectively then records get to display in my combo.
with this code I have cascading comboboxes that pull push results in a DataGridView; but each time I change selection in a combobox, it doubles results in the cascading combobox?!
Imports System.Data
Imports System.Data.OleDb
Imports System.Windows.Forms
[code]....
Im using VB.NET 2005 i want to sum two records in database. So when i retreive them to display in my textbox they already sum. the numbers are in text.
this is my code.
con.Open()
cmd = New OleDbCommand("select * from ChargedItems where name ='" & Me.cmbfnameEarnings.Text & "'", con)
[Code]......
I have the code below which does work, but I need to add further functionality to it. The functionality I want to add to it is the text I have commented in the code below.
Dim objSQLConnection As SqlConnection
Dim objSQLCommand As SqlCommand
Private Sub Page_Load(ByVal sender As System.Object, ByVal e As System.EventArgs)
[code]....
Before the if statement, I want to find out if the database already has records with the username in the strUser variable.
I'm very new to using VB.Net so I found it quite difficult to understand other answers that I searched for.
Basically, I have an project to develop where a user can create an account, and log in with it.
So far I have :
Created a database in ms access with the relevant fields (2003 edition)[code]...
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.
View 5 RepliesIm practicing a database and I have a 3-column table. Im using binary formatting to save/open the file. I cant see what is wrong with my code“
I can display records ok when I press the save button
I can also save the records ok when the save/close button is pressed.
When I reopen the programme and press the reload button to reload the dataset, additional records will not be displayed nor saved though original records will be showing.[code]...
I have 3 combo boxes full of data. I have an access database with a table and 3 fields. I am using the following code to insert the data from the combo boces into each field of the database. The program runs and I get no errors but the data is not going into the table.
Dim DrawCount As Integer = 0
Dim DateStr As String = ""
Dim TimeStr As String = ""
[Code].....
now i got a problem deleting records in the database
this is my code
Dim myConnection As SqlConnection
Dim myCommand As SqlCommand
[code].....
I have a table in an access database that binds to a datagridview with a binding source. The table is named Charges and contains all the charges to a lot of accounts. Let's say I only want to display the charges that are associated with Account ID = 1.
View 1 RepliesI Have made a database and connected it using VB.net 2005. I try to enter new records into the database and i can update the dataset but not the database itself, i write the code to update the database and i get an error saying[code...]
Here is the code for the whole thing, I click btnNext to display the next recrod and want to change it by clicking the update button but this is when the error comes up'[code...]
i have this problem on retrieve 3 records from database.i did it in a way that i have a few button.when i press on one of the button which have a value of bee then it will go into the database and search for bee.it will return me the result on bee at the same time it will also return both top and bottom record of bee.
How do i do that in SQL or VB.NET
How can I create a search box to search records in a sql database? I plan to use the search-box in the same Form where I have a details view interface to the database table.
View 2 RepliesI typically dont use a dataset in a case of new data insertion to the database. But then again, I will run in a problem the weather the inserting data already exsit in the database. Therefore i need to perform a search first. However, if i follow this it will take slow down the application (if the table has 1 million records). One way i could optmimize this is to load the whole table in to a dataset then the application doesnt have to go to a back end trip nwo it can search inthe dataset. Is this the standard way for inserting records?
View 3 Replieshaving a bit of trouble with inserting records into my database. I have the following code:
Dim mypath As String = Application.StartupPath & "\Data\Contacts.mdb"
Dim mypassword As String = ""
Dim inc As Integer
[Code]......
I have a very annoying problem with adding new records to my Access Database, I'm not getting any syntax errors but there's obviously a symantic error of some kind causing this headache. I've been developing an RFID system for two months now and spent the last four weeks trying to fix this one issue, if anyone can see wher
Private Sub m_btnSave_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles m_btnSave.Click
Dim da As New OleDb.OleDbDataAdapter
[code].....
when using the ExecuteReader() command with an SQL database, with an example as follows:
DUReader01 = DUCommand01.ExecuteReader()
DUReader01.Read()
DUCounter01 = DUReader01.Item("Counter")
I am looking for a simple code example that will test to determine if the database first is empty before attempting the Item()
command.With the above example, the Item() line produces the error "Conversion from type 'DBNull' to type 'Integer' is not valid." for an empty database.
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]....
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].....