我正在使用ObservableCollection<>
为DataGrid实现分页。 第一次正确显示10条记录。当点击Next
按钮时,它没有显示第二页。当我调试时,我发现当我设置currentpagenumber时,PropertyChanged
事件不会触发。PropertyChanged事件没有触发
我的代码是
ObservableCollection<RiskSettings> riskCollection = new ObservableCollection<RiskSettings>();
private ObservableCollection<ObservableCollection<RiskSettings>> Pages;
private ObservableCollection<RiskSettings> _ItemsSource;
private ObservableCollection<RiskSettings> _CurrentPage;
public RiskAlert()
{
InitializeComponent();
GeneratePages();
}
private void GeneratePages()
{
if (riskCollection.Count > 0)
{
PageCount = (int)Math.Ceiling(riskCollection.Count/(double)ItemsPerPage);
Pages = new ObservableCollection<ObservableCollection<RiskSettings>>();
for (int i = 0; i < PageCount; i++)
{
ObservableCollection<RiskSettings> page = new ObservableCollection<RiskSettings>();
for (int j = 0; j < ItemsPerPage; j++)
{
if (i * ItemsPerPage + j > riskCollection.Count - 1) break;
page.Add(riskCollection[i * ItemsPerPage + j]);
}
Pages.Add(page);
}
this.CurrentPage = Pages[0];
this.CurrentPageNumber = 1;
}
}
public int CurrentPageNumber
{
get { return _CurrentPageNumber; }
set
{
_CurrentPageNumber = value;
//if (PropertyChanged != null)
this.OnPropertyChanged(new PropertyChangedEventArgs("CurrentPageNumber"));
}
}
public ObservableCollection<RiskSettings> Collection
{
get
{
return riskCollection;
}
set
{
riskCollection = value;
GeneratePages();
}
}
public ObservableCollection<RiskSettings> CurrentPage
{
get { return _CurrentPage; }
set
{
_CurrentPage = value;
if (PropertyChanged != null)
PropertyChanged(this, new PropertyChangedEventArgs("CurrentPage"));
}
}
public int CurrentPageNumber
{
get { return _CurrentPageNumber; }
set
{
_CurrentPageNumber = value;
if (PropertyChanged != null)
PropertyChanged(this, new PropertyChangedEventArgs("CurrentPageNumber"));
}
}
public int ItemsPerPage
{
get { return (int)GetValue(ItemsPerPageProperty); }
set { SetValue(ItemsPerPageProperty, value); }
}
public static readonly DependencyProperty ItemsPerPageProperty = DependencyProperty.Register("ItemsPerPage", typeof(int), typeof(RiskAlert), new UIPropertyMetadata(20));
#region INotifyPropertyChanged Members
public event PropertyChangedEventHandler PropertyChanged;
#endregion
我收集的所有数据在数据网格riskCollection.My Name是grdRiskAlerts 我绑定的
GeneratePages();
this.ItemsSource = riskCollection;
grdRiskAlerts.ItemsSource = CurrentPage;
txtTotalRecs.Text = "Total : " + riskCollection.Count();
//txtDispRecs.Text = CurrentPage.Count().ToString();
txtNumOfPages.Text = this.CurrentPageNumber.ToString();
totalRecords = riskCollection.Count();
if (pageSize <= totalRecords)
{
if (totalRecords > 0)
txtDispRecs.Text = "Displaying 1 to " + CurrentPage.Count();
else
txtDispRecs.Text = "Displaying 0 to " + CurrentPage.Count();
}
对于这个页面的东西我也跟着从谷歌 我做的一个例子不知道为什么propertychanged事件没有解雇。
任何人都可以帮忙吗?
Ramki。
该粘贴不包含任何XAML,因此我们看不到您的绑定。您应该在您的问题中插入**相关的**代码位,以便人们可以立即查看它们而无需转到其他网站。 – slugster 2011-12-23 05:17:20
我是这个论坛的新手。我在我的链接中删除了不需要的代码[http://pastebin.com/twLjQ28Q] – user768853 2011-12-23 05:33:06
第二个粘贴为空。你不会让人们很容易帮助你...使用你问题下的编辑按钮将代码直接包含到你的问题中。 – slugster 2011-12-23 05:44:56