This is the code that i did to fetch data from the database and filling it to the combobox dropdown list at the form load event:
[Code]....
I added a few items in the combobox dropdown list at the form load event. [code] At the runtime I dont want to allow the user to write something in the combobox as a text.The user can only select an item from the dropdown list of the combobox.
View 13 RepliesI have a checkbox in my application,when the checkbox is checked then i want to fetch the data from the database and add it to the dropdownlist of the combobox.Again when the checkbox is unchecked then i want to ramove all the data from the dropdownlist of the combobox.
I did this
Private Sub CheckBox1_CheckedChanged(ByVal sender As Object, ByVal e As System.EventArgs) Handles CheckBox1.CheckedChanged
If CheckBox1.Checked = True Then
con = New OleDbConnection("Provider=Microsoft.Jet.Oledb.4.0;Data Source=Etech.mdb")
[CODE]...
When the checkbox is checked then the data is added from the database to the dropdownlist of the combobox but when i uncheck it then the data is not removed from the dropdownlist of the combobox. In the above code i think i need to add an else condition to remove the data from the dropdownlist of the combobox and make it empty when the checkbox is unchecked.......but i cant give the proper else condition in the above code.
I need to load a list of tables and linked tables in an MS Access Database into a combo box. I have this.
vb.net Imports System.Data.OleDb
[Code]...
1. How do I load the access tables and the link tables into my combo without the system tables showing up?
When the form loads I want to fill the combobox with the data present in the database. So I did the below
Private Sub BindCombo()
con = New OleDbConnection("Provider=Microsoft.Jet.Oledb.4.0;Data Source=C:UsersGautamDocumentsVisual Studio 2005ProjectsF1pracF1pracBank_Account.mdb")
con.Open()
cmd = New OleDbCommand("Select * from BankAccount", con)
[Code] .....
Doing this code the data is added up in the combobox dropdown list. But when I am selecting a data from the combobox dropdown list,the all the corresponding data of the other combobox also get filled automatically. I don't want to let the other combobox filled with their data automatically....
i am creating app , its a question i am stciked at , i am using vb 2008 by using databinding my combobox has the list ready from one column but as selection change the values from all textboxes and labels should change as per the combbox's selection can anyone help
View 10 RepliesI have this form: Attachment 73106 In this form,I want to fetch data from the database(access). Initially when the form loads,the balance field remains disabled. But when i select a data from the dropdownlist of the account number then i want the corresponding data of the balance field from the database is shown in the balance filed of the form and the textbox becomes enabled since it is containing the data. I did this at the form load event:
[Code]....
i have a requirement of using a dropdown list/combobox in data grid for allowing user to select from the list. how can i do that.I want to have a particular column with this option available that should be filled with data from the SQL database.
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now in this what i want is that user could select the emp id for which he wants to enter the data.then on the basis of the selection emp name field should be filled automatically and then user enter the salary which get saved after pressing a button on form how could i achieve that in VB.net and using SQL databse
I am developing one desktop application using vb.net 2008 and Microsoft SQL Server 2005. fetching the data from database between a given range.
the date field in my table is of type VARCHAR(25) and the date format stored is dd-mm-yyyy. when I using the between clause in the SQL query then it is not giving all the data every time i.e. the date criteria in where clause is not working fine.
while my clients requirement is to keep the date format as dd-mm-yyyy and fetch the data according to the given range.
I search on the forum and found many queries to fetch the data by converting or type casting the date field within sql query but nothing worked.
The table structure that I am using is as follows
USE [Firm_master]
GO
/****** Object: Table [dbo].[tblTransaction] Script Date: 05/17/2011 21:49:11 ******/
[Code]....
I have a combobox in a form, I want to fill it with names I have stored in a database. I know I have to use the fill command, but I am not sure what code I need to use. I imagine I need to place this code in the form load event, where I wrote my code to connect to the database. Do I need to create a sql fill command, select Names From Users, then execute that command in the combo box object.
View 3 RepliesI have two forms, forms a and b. Each form has a combo box. The user selects an item from form A's combo box and saves their selection to a database by pressing a button. How can I display their combo box selection from form A in form B's combo box on form B's form_load event?
View 1 RepliesI did the following
Imports System.Data
Imports System.data.OleDb
Public Class Form1
Dim con As OleDb[code].....
By this i can fetch only one row(the last row) of the access....how to modify the above code to fetch all the rows starting from the begining from the database..........
I am working on the Combobox.I was bind the data from Access database to Combobox in the DropDown Event.Now whn i click the Dropdown for selecting value , for one click the dropdown list is not showing. Some System is coming within few milliseconds it went out for second click the list is coming.This happens only whn i click the combobox first time in the form.After second time onwards the dropdown list coming properly.
View 2 RepliesI have a datagridview which has a column formatted combobox type. Now I want to determine when I click to these comboboxs, My program will show a msgbox.
View 4 Repliesi have 2 form. form 1 have combobox and second form textbox...how to load data form textbox into combobox..if i type hitachi in text box, automatictly "hitachi" will save in dropdownlist combobox..
View 5 RepliesI have a web form in which i have droped 6 dropdownlists and each dropdownlist have previous seven dates to open files from a specific folder concatenated with date at the end of file name.Problem is that when i select first dropdown list it opens file fine but when i select a date from anyother dropdownlist to open file then it open the same file which was opened from the first dropdownlist.Please see the code and make correction in it.
[Code]...
When we click on drop down combobox control in our windows form, it shows the list automatically. But when we press tab and navigate to that control from keyboard it doesn't shows the list automatically. So in other to show the list automatically on receiving focus what should be done?
View 1 RepliesI have a comboBox that is populated with a dataset. The values are:
KG - Kilograms
LB - Pounds
and so on.
So when the user clicks the comboBox in the DropDown the user will see:
KG - Kilograms
LB - Pounds
and so on.
[Code]...
I have a combo box that has a drop down list with long values in the drop down
Ex:
LB - Pounds
GR - Grams
When the user selects on of the values I want to just show the Abreviaqtions and not the descriptions. So when the drop down is shown it shows
LB - Pounds
GR - Grams
When the user selects "GR - Grams" from the drop down list "GR" is the only this shown in the combobox. I've tried TextChange,SelectedIndexChange and SelectedValueChange but I can't get them to work.
I'm following this exampleto build an editable GridView control.I have this code in my GridView:
<asp:TemplateField HeaderText="Negócio">
<ItemTemplate>
<asp:Label ID="lblNegocio" runat="server" Text='<%# Eval("Negocio") %>'></asp:Label>
[code].....
I'm trying to fill a ComboBox with values from a column in a database.I'm trying to use code I found in jmcilhinney's CodeBank post at url...credits to him since it's basically 100% his code in my image below I've tried 4 methods before this, and I've been receiving the same error, so it must be my fault.
View 4 RepliesI need to load a large txt file that is in a fixed width format. There are over 45K lines, so speed is important.I need to load one of the fields into a dropdown box and have another field (label) display the text of another field in the related line.I could import the file to an access db if needed, but would rather not as i also want the txt file to update from a link on a regular bases. So having it in a DB would be more work to process that part.[code]
View 1 Repliesfinally given up trying to make it work with my stored procedure.
Info:
Sql Server - 2005
Table name - venatio_company
Dim con As New SqlConnection
[code].....
I want to fetch some data from the database to the DataGridView,so i did this
Dim connString As String = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=Etech.mdb"
Dim myConnection As OleDbConnection = New OleDbConnection
myConnection.ConnectionString = connString
[Code].....
i have four comboboxs that are dependant on each other selection.Its working fine but but what i want is to show "select an item" on zero selectedindex of each combobbox when form load.How can i do that???????what i have done is like as:
Private Sub Form2_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
con.Open()
Dim dt2 As New DataTable("class")
Dim sql2 As String
[code]....
the other combobxes are populating like same code ...
i need some help with this problem. i have seen some solutions but written in C and im not that good to convert from C to vb.net.Well i want to 'do something' when i mouse move at an item of the combobox dropdown list.like when i move the mouse over "jkl" make the button1.text = "jkl"when i move the mouse over "def" item make the button1.text = "def"
View 4 RepliesI have a show button that will fetch data from the database:
Private Sub Show_Btn_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles Show_Btn.Click
con = New OleDbConnection("Provider=Microsoft.Jet.Oledb.4.0;Data
[Code]....
Items collection cannot be modified when the DataSource property is set. How to solve this problem?
I'm trying to fill a ComboBox with values from a column in a database...I'm trying to use code I found in jmcilhinney's CodeBank post at url. credits to him since it's basically 100% his code in my image below.I've tried 4 methods before this, and I've been receiving the same error, so it must be my fault... the image below shows the code and the problem.
View 1 RepliesHow to display data from the database (records) in a vb.net application without a datagrid (i.e in textboxes, and labels) ??
I have used "Add data source and connected my database and also associated the data bindings" but still it doesn't work.
I will attach an image to depict what functionality i'm basically looking for..
[URL]
I want to populate the highlighted controls from a database.
I am having trouble getting my program to work. i added a database conection and added the data source, then placed the list box i wanted in the form and the code to fill the list appeared as it should. the problem is when i run the debugger i get an unhandled exception saying "invalid user authorization". i went to the data source and previewed the data set and i can view it just fine. i did this in a different program using the same data set and had no problems.
View 1 Replies
