You woould typically put it in a 'update' button click event.
This code will replace the text of the currently selected combobox item with the text from text box 1. I my code after restarting the application new items which are added in the run time will clear if u want that items also just save that items in xml file or database Private Sub txt_KeyDown(ByVal sender As Object, ByVal e As KeyEventArgs)ĭim txt As TextBox = DirectCast(sender, TextBox) If you are creating textboxes dynamically then copy the below code in the key down event function and find the dynamic textbox control text and use that control text value in the place of textbox1.text
If TextBox1.Text = ComboBox1.Items(i) Then If you want to textboxes copy the below code in the keydown events of all textboxes no need to use combobox1_keydown
I this you can selected required item in the combobox or you can type the new text in that combobox and press enter then automatically that text will add into the combobox items If ComboBox1.Text = ComboBox1.Items(i) Then Private Sub ComboBox1_KeyDown(ByVal sender As System.Object, ByVal e As ) Handles ComboBox1.KeyDownįor i As Integer = 0 To - 1 If you want to add the data to the combobox without using textboxes then follow the below code Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.LoadĬomboBox1.AutoCompleteSource = AutoCompleteSource.ListItemsĬomboBox1.AutoCompleteMode = AutoCompleteMode.SuggestAppendĬ("meter" + i.ToString + " location") The following VB.Net program populating a Combobox from a Dictionary. The key is identical in a key-value pair and it can have at most one value in the dictionary, but a value can be associated with many different keys.ĬomboBox1.DataSource = New BindingSource(colors, Nothing) MessageBox.Show(ComboBox1.Text + " " + Convert.ToString(CInt(ComboBox1.SelectedValue)))īind a ComboBox to a generic Dictionary in VB.NetĪ Dictionary class is a data structure that represents a collection of keys and values pair of data. The follwoing VB.Net program bind a combobox with Enum values.ĬomboBox1.DataSource =. When these values are bind to a ComboBox, the end user can select an option directly from a list of the Enum strings.ĬomboBox1.DataSource = Enum.GetValues(typeof(Colors)) MsgBox(ComboBox1.Text + " - " + ComboBox1.SelectedValue)Įnum provide a better way in which to create a group of related constants that can be grouped as strings or integer values. Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click MessageBox.Show("Can not open connection ! ") Sql = "select au_id,au_lname from authors"Ĭonnection = New SqlConnection(connetionString)Ĭommand = New SqlCommand(sql, connection) Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.LoadĬonnetionString = "Data Source=ServerName Initial Catalog=databasename User ID=userid Password=yourpassword" The following VB.Net program fetch the values from database and store it in a dataset and later bind to a combobox. Also we can populate a combo box from a dataset values. The VB.Net SqlDataAdapter object allows us to populate Data Tables in a DataSet. The DataSet consists of a collection of DataTable objects that you can relate to each other with DataRelation objects. How to populate a combo box from a dataset in VB.Net