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How can I implement autocompletion in a combobox that has a generic list as its datasource?
Posted on 2013-01-04
I've created a generic list (a collection) and made it the dataSource for my combobox.
Now I need to use autocompletion for when the user begins to type in the combobox while searching for something in the list. There seems to be a good amount of help on the web for autocompletion where the combobox has a different kind of datasource (ie. datatable) but I'm still scratching my head trying to get this to work with a generic list.
Suggestions?
Now I need to use autocompletion for when the user begins to type in the combobox while searching for something in the list. There seems to be a good amount of help on the web for autocompletion where the combobox has a different kind of datasource (ie. datatable) but I'm still scratching my head trying to get this to work with a generic list.
Suggestions?
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7
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10 Comments
Active 6 days ago
Custom objects. Each item (object) has several properties and methods. The collection object which holds these items uses the System.ComponentModel.Bind
Active today
So something like this?
using System.Collections.Generic;
using System.Windows.Forms;
namespace WindowsFormsApplication5
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
List<CustomObject> originalList = new List<CustomObject>()
{
new CustomObject() { Text = "Hello World!" },
new CustomObject() { Text = "Goodbye World!" },
};
System.ComponentModel.BindingList<CustomObject> bindingList = new System.ComponentModel.BindingList<CustomObject>(originalList);
this.comboBox1.DataSource = bindingList;
this.comboBox1.DisplayMember = "Text";
this.comboBox1.AutoCompleteMode = AutoCompleteMode.SuggestAppend;
this.comboBox1.AutoCompleteSource = AutoCompleteSource.ListItems;
}
}
public class CustomObject
{
public string Text { get; set; }
}
}
Active 6 days ago
Ahh Monday, back to work. BTW, thanks for your help on this.
So, when I use:
So, when I use:
this.comboBox1.AutoCompleteSource = AutoCompleteSource.ListItems;
Active 6 days ago
Sure, here it is:
'IN-FORM CODE:
Private Sub frmOfficiant_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
Officiants = New Officiants
Dim blankOfficiant As New Officiant 'this is provided for the user to add a new officiant if need be
Officiants.RefreshFromDatabase()
Officiants.Insert(0, blankofficiant)
With Me.cboOfficiantLastName
.DataSource = Officiants
.DisplayMember = "LastName"
.AutoCompleteMode = AutoCompleteMode.SuggestAppend
.AutoCompleteCustomSource = AutoCompleteSource.ListItems
End With
End Sub
'-----------------------------------------------
'COLLECTION CLASS OF CUSTOM CLASS
Public Class Officiants
Inherits System.ComponentModel.BindingList(Of Officiant)
'the following three subs allow this class to know when a
'new item is inserted, added, or the list is changed.
Protected Overrides Sub InsertItem(ByVal index As Integer, ByVal item As Officiant)
MyBase.InsertItem(index, item)
End Sub
Protected Overrides Sub OnAddingNew(ByVal e As System.ComponentModel.AddingNewEventArgs)
MyBase.OnAddingNew(e)
End Sub
Protected Overrides Sub OnListChanged(ByVal e As System.ComponentModel.ListChangedEventArgs)
MyBase.OnListChanged(e)
End Sub
Public Sub RefreshFromDatabase()
Dim strsql As String = _
"SELECT officiant_id, title, first_name, " & _
" last_name, address1, address2, " & _
" city, state, zip, " & _
" phone " & _
"FROM Officiant " & _
"--where --ADD WHERE STATEMENT HERE "
Dim drItems As SqlClient.SqlDataReader
drItems = DataSrc.GetDataReader(strsql)
'clear current list
MyBase.Clear()
'cycle through all items and add to list
While drItems.Read
Dim x As New Officiant
x.OfficiantId = CInt(NullToZero(drItems("officiant_id")))
x.Title = CStr(NullToBlank(drItems("title")))
x.FirstName = CStr(NullToBlank(drItems("first_name")))
x.LastName = CStr(NullToBlank(drItems("last_name")))
x.Address1 = CStr(NullToBlank(drItems("address1")))
x.Address2 = CStr(NullToBlank(drItems("address2")))
x.City = CStr(NullToBlank(drItems("city")))
x.State = CStr(NullToBlank(drItems("state")))
x.Zip = CStr(NullToBlank(drItems("zip")))
x.Phone = CStr(NullToBlank(drItems("phone")))
MyBase.Add(x)
End While
'close the datareader
drItems.Close()
End Sub
.
.
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