我正在更新一个透视查看器应用程序,遇到了以下问题。希望有人能在我陷入困境时给出答案。
问题是:当页面加载时,带有属性和其他功能的一侧加载良好,但交易卡不加载任何图像。其中一些加载默认的白色背景,而大多数显示深灰色,几乎是黑色背景。所有这些都可以放大并显示所有属性,但不能显示图像。
调试:我发现注释掉一些属性会导致每次都正确加载图像。如果我只评论了1或2个,那么图像会在一定时间内加载(大约10次页面刷新中有2次)。目前,列表中包含29个属性,数据正在从数据库加载,然后在数据透视查看器中使用。项目来源。
有什么想法吗?
有一些名称更改的代码(选项二一是我注释掉的属性):
主页.xaml.cs
public MainPage()
{
InitializeComponent();
PivotViewModel pivotModel = new PivotViewModel();
CollectionsComboBox.SelectedIndex = 0;
this.DataContext = pivotModel;
}
private void DropDown_ItemSelected(object sender, EventArgs e)
{
// Process selected index change here
if (((ComboBox)sender).SelectedValue == "Option One")
{
OptionOnePivotViewModel OptionOnePivot = new OptionOnePivotViewModel();
PivotViewer.ItemsSource = OptionOnePivot.Data;
PivotViewer.PivotProperties = OptionOnePivot.PivotProperties;
PivotViewer.ItemTemplates = OptionOnePivot.TemplateCollection;
PivotViewer.ItemAdornerStyle = blankAdorner;
}
else
{
OptionTwoPivotViewModel OptionTwoPivot = new OptionTwoPivotViewModel();
PivotViewer.ItemsSource = OptionTwoPivot.Data;
PivotViewer.PivotProperties = OptionTwoPivot.PivotProperties;
PivotViewer.ItemAdornerStyle = basicAdorner;
PivotViewer.ItemTemplates = OptionTwoPivot.TemplateCollection;
}
}
选项TwoPivotViewModel.cs:
public OptionTwoPivotViewModel()
{
DomainContext = new OptionTwoDomainContext();
Data = DomainContext.Load(DomainContext.GetHRDatasQuery()).Entities;
PivotProperties = getPivotProperties();
SmallTemplate = "EmpSmall";
TemplateCollection = new PivotViewerItemTemplateCollection()
{
(PivotViewerItemTemplate) Application.Current.Resources[SmallTemplate]
};
}
private List<PivotViewerProperty> getPivotProperties()
{
List<PivotViewerProperty> properties = new List<PivotViewerProperty>
{
new PivotViewerStringProperty{ Id="Name", Options=PivotViewerPropertyOptions.CanSearchText, DisplayName="Name", Binding=new System.Windows.Data.Binding("Name")},
new PivotViewerStringProperty{ Id="Status", Options=PivotViewerPropertyOptions.CanFilter, DisplayName="Status", Binding=new System.Windows.Data.Binding("Status")},
new PivotViewerDateTimeProperty{ Id="StartDate", Options=PivotViewerPropertyOptions.CanFilter, DisplayName="Start Date", Binding=new System.Windows.Data.Binding("StartDate")},
//additional properties follow...
};
return properties;
编辑:我注意到,如果我在下面的getter属性中设置了一个断点,那么继续加载图像也很好。
public ImageSource BackgroundImage
{
get
{
string location = Image_Location;
location = location.Substring(location.LastIndexOf("/"));
Uri uri;
if (Image_Location.Contains(".gif"))
{
uri = new Uri(Image_Location, UriKind.Absolute);
}
else
{
var host = Application.Current.Host.Source.Host;
uri = new Uri("https://" + host + "/fileLibrary/employees/images/500"+location, UriKind.RelativeOrAbsolute);
}
// set the image source
BitmapImage bmpImg = new BitmapImage(uri);
_loaded = _backgroundImage != null;
if (!_loaded)
{
bmpImg.ImageOpened += ImageOpened;
bmpImg.ImageFailed += ImageFailed;
}
return new BitmapImage(uri);
}
TemplateCollection = new PivotViewerItemTemplateCollection()
{
(PivotViewerItemTemplate) Application.Current.Resources[SmallTemplate]
};
没有在上面的初始值设定项中分配属性?