CODEWITHSUNDEEP
vb.netcombobox
EmPlusPlus
EmPlusPlus

Reputation: 181

How can I keep items in ComboBox after close the application

Public Class Form1

Private Sub btnAddCat_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnAddCat.Click

    If txtAdd.Text <> "" Then
        comboBox1.Items.Add(txtAdd.Text)
        txtAdd.Clear()
    Else
        MessageBox.Show("Fill the blanket")
    End If

End Sub
End Class

If user close application should see the items but there is no items Can anyone help? thanks

Upvotes: 0

Views: 4440

Answers (2)

Steven Doggart
Steven Doggart

Reputation: 43743

If you want the application to remember the value the next time it is run, you will need to save the value to disk. There are many different options for how to do that (e.g. text file, XML, database, registry), but for simple tasks, I'd recommend just using the built-in Settings feature.

To use the Settings feature, first you need to open your project properties screen. Then select the Settings tab. Add a new setting by typing in the name and selecting a data type. For instance, you could type MyItems for the name, and then select System.Collections.Specialized.StringCollection as the data type. Then, in your code, you can read the current value of the setting like this (perhaps in your form's Load event handler):

For Each i As String In My.Settings.MyItems
    ComboBox1.Items.Add(i)
Next

And then you could save the list to the setting, like this (perhaps in your form's FormClosed event handler):

My.Settings.MyItems.Clear()
For Each i As String In ComboBox1.Items
    My.Settings.MyItems.Add(i)
Next

Upvotes: 1

Karl Anderson
Karl Anderson

Reputation: 34846

You need to persist the data to a data store (either the database or the file system) so that the next time the application runs, then it can check the data store and display the items to the user.

Upvotes: 1

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