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我是WPF的新手，並且正在從xml文件數據綁定列表框中，當程序啓動時一切都會正確加載，但是我在插入新記錄後無法使列表框更新。我讀過的所有內容都指向使用ObservableCollection，但我無法弄清楚如何讓Listbox刷新。我曾嘗試調用對ItemsSource的更新，但它似乎仍然不起作用。理想情況下，我想只有一個刷新按鈕，用戶可以點擊更新列表框。有沒有人有一個調用一個更新列表框中的任何建議 感謝邁克爾WPF更新列表框數據綁定
public class ContactList
{
string contactFile = @"U:\Peridot\Users\" + Program.getUser.ToString() + ".xml";
public ContactList()
{
}
public ContactList(string contactFullName, string contactCellNumber,string contactBusinessNumber, string contactExtension, string contactEmail, string contactStatus,string contactAuralinkStatus, string contactAuralinkID)
{
this.ContactFullName = contactFullName;
this.ContactCellNumber = contactCellNumber;
this.ContactBusinessNumber = contactBusinessNumber;
this.ContactExtension = contactExtension;
this.ContactEmail = contactEmail;
this.ContactStatus = contactStatus;
this.ContactAuralinkStatus = contactAuralinkStatus;
this.ContactAuralinkID = contactAuralinkID;
}
private string ContactFullName;
public string PropContactFullName
{
get { return ContactFullName; }
set { ContactFullName = value; }
}
private string ContactCellNumber;
public string PropContactCellNumber
{
get { return ContactCellNumber; }
set { ContactCellNumber = value; }
}
private string ContactBusinessNumber;
public string PropContactBusinessNumber
{
get { return ContactBusinessNumber; }
set { ContactBusinessNumber = value; }
}
private string ContactEmail;
public string PropContactEmail
{
get { return ContactEmail; }
set { ContactEmail = value; }
}
private string ContactStatus;
public string PropContactStatus
{
get { return ContactStatus; }
set { ContactStatus = value; }
}
private string ContactAuralinkStatus;
public string PropContactAuralinkStatus
{
get { return ContactAuralinkStatus; }
set { ContactAuralinkStatus = value; }
}
public string ContactAuralinkID;
public string PropContactAuralinkID
{
get { return ContactAuralinkID; }
set { ContactAuralinkID = value; }
}
private string ContactExtension;
public string PropContactExtension
{
get { return ContactExtension; }
set { ContactExtension = value; }
}
}
public class Contacts : System.Collections.ObjectModel.ObservableCollection<ContactList>
{
string contactFile = @"U:\Peridot\Users\" + Program.getUser.ToString() + ".xml";
//Added this
public event NotifyCollectionChangedEventHandler CollectionChanged;
protected virtual void OnCollectionChanged(NotifyCollectionChangedEventArgs e)
{
if (CollectionChanged != null)
{
CollectionChanged(this, e);
}
}
public Contacts(): base()
{
getContactFile();
XDocument doc = XDocument.Load(contactFile);
var contacts = from r in doc.Descendants("Contact")
select new
{
FullName = r.Element("FullName").Value,
CellNumber = r.Element("CellNumber").Value,
BusinessNumber = r.Element("BusinessNumber").Value,
Extension = r.Element("Extension").Value,
Email = r.Element("Email").Value,
AuralinkID = r.Element("AuralinkID").Value
};
foreach (var r in contacts)
{
Add(new ContactList(r.FullName,r.CellNumber , r.BusinessNumber,r.Extension, r.Email, "", "",r.AuralinkID));
}
}
private void getContactFile()
{
if (!File.Exists(contactFile))
{
new XDocument(
new XElement("Contacts"
)
)
.Save(contactFile);
}
}
}
private void addContactICON_MouseDown(object sender, MouseButtonEventArgs e)
{
if (!doesContactExist())
{
try
{
XDocument doc = XDocument.Load(@"U:\Peridot\Users\" + Program.getUser.ToString() + ".xml");
XElement contact = new XElement("Contact");
contact.Add(new XElement("ContactID", contactID.ToString()));
contact.Add(new XElement("FullName", contactNameLBL.Content.ToString()));
contact.Add(new XElement("CellNumber", c1.Content.ToString()));
contact.Add(new XElement("BusinessNumber", businessPhoneIcon.ToolTip.ToString()));
contact.Add(new XElement("Extension", c3.Content.ToString()));
contact.Add(new XElement("Email", emailIcon.ToolTip.ToString()));
contact.Add(new XElement("AuralinkID", videoIcon.ToolTip.ToString()));
doc.Element("Contacts").Add(contact);
doc.Save(@"U:\Peridot\Users\" + Program.getUser.ToString() + ".xml");
MessageBox.Show(contactNameLBL.Content.ToString() + " has been added to your contacts.");
}
catch (Exception ex)
{
MessageBox.Show(ex.ToString());
}
}
else
MessageBox.Show("Contact Already Exists");
}
XAML
<StackPanel>
<StackPanel.Resources>
<local:Contacts x:Key="contactListobj"></local:Contacts>
</StackPanel.Resources>
<ListBox x:Name="contactList" Width="305" Margin="5,3,0,0" VerticalAlignment="Top" HorizontalAlignment="Left" ItemsSource="{Binding Source={StaticResource contactListobj}}" Height="450" IsSynchronizedWithCurrentItem="True">
<ListBox.ItemTemplate>
<DataTemplate>
<StackPanel Orientation="Horizontal" HorizontalAlignment="Center" >
<TextBlock Text="{Binding PropContactFullName}" ToolTip="{Binding PropContactFullName}" Height="35" Width="175" FontSize="12"/>
<TextBlock x:Name="contactEmailLBL" Text="{Binding PropContactEmail}" ToolTip="{Binding PropContactEmail}" Cursor="Hand" Width="30" Height="35" MouseLeftButtonUp="contactEmailLBL_MouseLeftButtonUp" Foreground="{x:Null}" FontSize="1">
<TextBlock.Background>
<ImageBrush Stretch="Uniform" ImageSource="Images/emailICON.png"/>
</TextBlock.Background>
</TextBlock>
<TextBlock x:Name="cellNumberLBL" Text="{Binding PropContactCellNumber}" ToolTip="{Binding PropContactCellNumber}" Cursor="Hand" MouseLeftButtonUp="cellNumberLBL_MouseLeftButtonUp" Width="30" Height="35" Foreground="{x:Null}" FontSize="1">
<TextBlock.Background>
<ImageBrush Stretch="Uniform" ImageSource="Images/mobilePhoneICON.png"/>
</TextBlock.Background>
</TextBlock>
<TextBlock x:Name="businessNumberLBL" Text="{Binding PropContactBusinessNumber}" ToolTip="{Binding PropContactBusinessNumber}" Cursor="Hand" Width="30" Height="35" MouseLeftButtonUp="businessNumberLBL_MouseLeftButtonUp" Foreground="{x:Null}" FontSize="1">
<TextBlock.Background>
<ImageBrush Stretch="Uniform" ImageSource="Images/BusinessPhoneICON.png"/>
</TextBlock.Background>
</TextBlock>
<TextBlock x:Name="auralinkLBL" Text="{Binding PropContactAuralinkID}" ToolTip="{Binding PropContactAuralinkID}" Cursor="Hand" Width="30" Height="35" Foreground="{x:Null}" FontSize="1" MouseLeftButtonUp="auralinkLBL_MouseLeftButtonUp">
<TextBlock.Background>
<ImageBrush Stretch="Uniform" ImageSource="Images/VideoICON.png"/>
</TextBlock.Background>
</TextBlock>
</StackPanel>
</DataTemplate>
</ListBox.ItemTemplate>
</ListBox>
</StackPanel>
我在代碼中看不到ObservableCollection。你確定你在使用它嗎？ – BradleyDotNET
我必須錯誤地實現它，因爲我認爲我需要在此類中的某處使用公共虛擬事件NotifyCollectionChangedEventHandler CollectionChanged，但我不確定如何對其進行調用。由於更改發生在文件中。 – perirose