TextBox AutoComplete在vb.net中不起作用

Question

I'm trying to add auto complete to a VB.NET windows forms textbox. I have a text box of size 268, 102 placed on a form. I have tried several ways to get the autocomplete to work: Adding strings to the AutoCompleteCustomSource via the Properties pane Adding a list of strings to a source and assigning that in code - multiple different ways Neither of these make any autocompleteing happen...

Most recent code attempt is pretty much the example shown on MSDN:

Dim I2cMonths As New AutoCompleteStringCollection()

Private Sub Form1_Load(sender As System.Object, e As System.EventArgs) Handles MyBase.Load
    '...
    I2cMonths.AddRange(New String() {"January", "Febuary", "March"})
    With I2C_TextBox
        .AutoCompleteCustomSource = I2cMonths
        .AutoCompleteMode = AutoCompleteMode.SuggestAppend
        .AutoCompleteSource = AutoCompleteSource.CustomSource
    End With
    '...
End Sub

What am I doing wrong??

Answer 1

Try changing the order around...

     I2C_TextBox.AutoCompleteMode = AutoCompleteMode.SuggestAppend
    12C_Textbox.AutoCompleteSource = AutoCompleteSource.CustomSource
       I2cMonths.AddRange(New String() {"January", "Febuary", "March"})        
     12C_TextBox.AutoCompleteCustomSource = 12cMonths

Answer 2

Given your description of the case, I suspect your TextBox is MULTILINE. Standard AutoComplete doesn't work in multiline textboxes.

If you want AutoComplete in a multiline textbox, you'll have to implement it yourself using the appropriate events of the TextBox and processing an on-the-fly list(view)-"pop-up" or some other equivalent.

Answer 3

Try this snippet

    I2cMonths.AddRange(New String() {"January", "Febuary", "March"})     
    With I2C_TextBox 
       .AutoCompleteMode = AutoCompleteMode.SuggestAppend
       .AutoCompleteSource = AutoCompleteSource.CustomSource
       .AutoCompleteCustomSource = I2cMonths
    End With