C# 创建数据模板代码隐藏
我正在尝试为show data创建一个列表框视图,我希望它包含一个列表框,其中包含两列“Product ID&Product Barcode”的datatemplate 我想使用纯C代码创建它,或者如果可能,通过xaml加载它?如果我能创建一个模板,我就可以在c#中获得某种资源 到目前为止,我所做的是: 在XAML中:C# 创建数据模板代码隐藏,c#,wpf,c#-4.0,C#,Wpf,C# 4.0,我正在尝试为show data创建一个列表框视图,我希望它包含一个列表框,其中包含两列“Product ID&Product Barcode”的datatemplate 我想使用纯C代码创建它,或者如果可能,通过xaml加载它?如果我能创建一个模板,我就可以在c#中获得某种资源 到目前为止,我所做的是: 在XAML中: <Grid> <Grid.RowDefinitions> <RowDefinition Height="37*" />
<Grid>
<Grid.RowDefinitions>
<RowDefinition Height="37*" />
<RowDefinition Height="88*" />
</Grid.RowDefinitions>
<TextBlock Text="Type Your Search :" HorizontalAlignment="Left" VerticalAlignment="Bottom" Width="112" Height="15.96" Margin="20,0,0,4" />
<TextBox HorizontalAlignment="Right" VerticalAlignment="Bottom" Height="25" Width="300" Margin="0,0,44,0" x:Name="txtCAuto" TextWrapping="NoWrap" HorizontalContentAlignment="Right" />
<ListBox x:Name="lbSuggestion" SelectionChanged="lbSuggestion_SelectionChanged" Foreground="Black" Width="300" Margin="0,0,44,0" FlowDirection="RightToLeft" Background="LightYellow" Grid.Row="1" Visibility="Collapsed" ScrollViewer.HorizontalScrollBarVisibility="Auto" ItemsSource="{Binding}" HorizontalAlignment="Right" VerticalAlignment="Top" HorizontalContentAlignment="Right" BorderBrush="Transparent" Grid.IsSharedSizeScope="True">
</ListBox>
</Grid>
在代码隐藏中:
string typedString = txtCAuto.Text.ToUpper();
List<string> autoList = new List<string>();
autoList.Clear();
prodDetails ps = SelProd4Sale();
foreach (string item in ps.ProdBrcdList)
{
if (!string.IsNullOrEmpty(txtCAuto.Text))
{
if (item.StartsWith(typedString))
{
//autoList.Add(item);
FrameworkElementFactory colProdID = new FrameworkElementFactory(typeof(TextBlock));
Binding prodID = new Binding(ps.ProdIDList.ToString());
colProdID.SetBinding(TextBlock.TextProperty, prodID);
FrameworkElementFactory colProdBarcode = new FrameworkElementFactory(typeof(TextBlock));
Binding prodBarcode = new Binding();
prodBarcode.Path = new PropertyPath(ps.ProdBrcdList.ToString());
colProdBarcode.SetBinding(TextBlock.TextProperty, prodBarcode);
FrameworkElementFactory sb = new FrameworkElementFactory(typeof(StackPanel));
sb.AppendChild(colProdID);
sb.AppendChild(colProdBarcode);
dTemplate = new DataTemplate { VisualTree = sb };
dTemplate.Seal();
}
}
}
if (autoList.Count > 0)
{
lbSuggestion.ItemTemplate = dTemplate;
//lbSuggestion.ItemsSource = autoList;
lbSuggestion.Visibility = Visibility.Visible;
}
else if (txtCAuto.Text.Equals(""))
{
lbSuggestion.Visibility = Visibility.Collapsed;
lbSuggestion.ItemsSource = null;
}
else
{
lbSuggestion.Visibility = Visibility.Collapsed;
lbSuggestion.ItemsSource = null;
}
string typedString=txtCAuto.Text.ToUpper();
List autoList=新列表();
autoList.Clear();
prodDetails ps=SelProd4Sale();
foreach(ps.ProdBrcdList中的字符串项)
{
如果(!string.IsNullOrEmpty(txtCAuto.Text))
{
if(项目启动(类型字符串))
{
//自动列表。添加(项目);
FrameworkElementFactory colProdID=新的FrameworkElementFactory(typeof(TextBlock));
Binding prodID=新绑定(ps.ProdIDList.ToString());
colProdID.SetBinding(TextBlock.TextProperty,prodID);
FrameworkElementFactory colProdBarcode=新FrameworkElementFactory(typeof(TextBlock));
Binding prodBarcode=新绑定();
ProdBrcdList.ToString());
colProdBarcode.SetBinding(TextBlock.TextProperty,prodBarcode);
FrameworkElementFactory sb=新FrameworkElementFactory(类型(StackPanel));
某人的孩子(colProdID);
某人的孩子(colProdBarcode);
dTemplate=newdatatemplate{VisualTree=sb};
dTemplate.Seal();
}
}
}
如果(autoList.Count>0)
{
lbSuggestion.ItemTemplate=dTemplate;
//lbSuggestion.ItemsSource=自动列表;
lbSuggestion.Visibility=可见性.Visibility;
}
else if(txtCAuto.Text.Equals(“”)
{
lbSuggestion.Visibility=Visibility.Collapsed;
lbSuggestion.ItemsSource=null;
}
其他的
{
lbSuggestion.Visibility=Visibility.Collapsed;
lbSuggestion.ItemsSource=null;
}
但没有数据显示,请提供任何建议。
谢谢,如果定义了
x:Key,您可以在xaml中定义资源,并在代码隐藏中检索资源
在您的xaml中:
<DataTemplate x:Key="anyId">...</DataTemplate>
或
我创建了如下数据模板:
private DataTemplate getDataTemplate()
{
DataTemplate retVal = null;
String markup = String.Empty;
markup = "<DataTemplate xmlns=\"http://schemas.microsoft.com/winfx/2006/xaml/presentation\" xmlns:x=\"http://schemas.microsoft.com/winfx/2006/xaml\" xmlns:local=\"clr-namespace:YOUR.PROJECT.NAMESPACE;assembly=YOUR.PROJECT.NAMESPACE\">";
markup += "<Grid>";
markup += "<TextBlock Text=\"{Binding RelativeSource={RelativeSource Mode=TemplatedParent}, Path=Content, Mode=OneWay}\" />";
markup += "</Grid>";
markup += "</DataTemplate>";
retVal = (DataTemplate)XamlReader.Load(markup);
return retVal;
}
注意:您可能必须更改WPF的“xmlns”,因为此示例取自我的一个Silverlight项目。但是想法是一样的。条件XAML数据模板
在对象的XAML文件中定义静态数据模板是实现这一点的惯用方法。另外,Microsoft为DataTemplate.LoadContent()提供的示例很好地展示了如何在需要时在运行时动态切换模板(请参阅)
但是,如果您对条件XAML编译有特殊要求(如在构建发布版本时省略仅调试XAML),则需要采用XamlReader.Load()方法(请参阅)
为此,我认为更详细一点的示例可能会有所帮助。这里,我有一个仅调试的ListView,它绑定到自定义对象的ObservableCollection。ListView不是在静态XAML中定义的,因为它只在调试模式下需要
自定义类:
class ActiveNotification
{
public String Name { get; set; }
public String Type { get; set; }
public String DayOfWeek { get; set; }
public DateTime DeliveryTime { get; set; }
public String Id { get; set; }
}
私有成员变量:
readonly ObservableCollection<ActiveNotification> _activeNotifications = new ObservableCollection<ActiveNotification>();
readonly ListView listViewNotifications =
new ListView
{
Visibility = Visibility.Collapsed,
HorizontalAlignment = HorizontalAlignment.Left,
VerticalAlignment = VerticalAlignment.Bottom,
};
readonly ObservableCollection\u activeNotifications=new ObservableCollection();
只读ListView listViewNotifications=
新列表视图
{
可见性=可见性。已折叠,
水平对齐=水平对齐。左,
垂直对齐=垂直对齐。底部,
};
加载时间列表视图设置:
// Set up notifications list
listViewNotifications.SetBinding(ListView.ItemsSourceProperty, new Binding { Source = _activeNotifications });
listViewNotifications.Tapped += listViewNotifications_Tapped;
Grid.SetRowSpan(listViewNotifications, 2);
Grid.SetColumnSpan(listViewNotifications, 2);
var xamlString =
"<DataTemplate xmlns=\"http://schemas.microsoft.com/winfx/2006/xaml/presentation\">" +
"<StackPanel Orientation=\"Horizontal\" VerticalAlignment=\"Center\">" +
"<TextBlock Text=\"{Binding Name}\" Margin=\"20,0,10,0\"/>" +
"<TextBlock Text=\"{Binding Type}\" Margin=\"0,0,10,0\"/>" +
"<TextBlock Text=\"{Binding DayOfWeek}\" Margin=\"0,0,10,0\"/>" +
"<TextBlock Text=\"{Binding DeliveryTime}\" Margin=\"0,0,10,0\"/>" +
"<TextBlock Text=\"{Binding Id}\"/>" +
"</StackPanel>" +
"</DataTemplate>";
var dataTemplate = (DataTemplate)XamlReader.Load(xamlString);
listViewNotifications.ItemTemplate = dataTemplate;
GridMain.Children.Add(listViewNotifications);
//设置通知列表
SetBinding(ListView.ItemsSourceProperty,新绑定{Source=\u activeNotifications});
listViewNotifications.Tapped+=listViewNotifications\u Tapped;
SetRowSpan(listViewNotifications,2);
SetColumnSpan(listViewNotifications,2);
var xamlString=
"" +
"" +
"" +
"" +
"" +
"" +
"" +
"" +
"";
var dataTemplate=(dataTemplate)XamlReader.Load(xamlString);
listViewNotifications.ItemTemplate=数据模板;
GridMain.Children.Add(listViewNotifications);
如果要在code behind中执行,为什么不创建一个自定义的ListBoxItem
?如果可以在XAML中执行,为什么会有这么多代码。当我尝试在XAML中执行时,也没有数据出现,所以我尝试在CodeBehind中执行。我认为最好的做法是在XAML中创建它,但是我选择用代码来说明它是如何完成的,问题是:-)当我尝试用XAML创建它时,没有数据出现,所以在后面的代码中完成。你必须在XAML文件的资源字典中编写DataTemplate,并自己设置x:Key!我的意思是,您必须设置一个x:Key参数,以便能够检索代码背后的任何资源。回答得好。允许您在XAML中定义数据模板所属的位置,然后在必要时使用它。
class ActiveNotification
{
public String Name { get; set; }
public String Type { get; set; }
public String DayOfWeek { get; set; }
public DateTime DeliveryTime { get; set; }
public String Id { get; set; }
}
readonly ObservableCollection<ActiveNotification> _activeNotifications = new ObservableCollection<ActiveNotification>();
readonly ListView listViewNotifications =
new ListView
{
Visibility = Visibility.Collapsed,
HorizontalAlignment = HorizontalAlignment.Left,
VerticalAlignment = VerticalAlignment.Bottom,
};
// Set up notifications list
listViewNotifications.SetBinding(ListView.ItemsSourceProperty, new Binding { Source = _activeNotifications });
listViewNotifications.Tapped += listViewNotifications_Tapped;
Grid.SetRowSpan(listViewNotifications, 2);
Grid.SetColumnSpan(listViewNotifications, 2);
var xamlString =
"<DataTemplate xmlns=\"http://schemas.microsoft.com/winfx/2006/xaml/presentation\">" +
"<StackPanel Orientation=\"Horizontal\" VerticalAlignment=\"Center\">" +
"<TextBlock Text=\"{Binding Name}\" Margin=\"20,0,10,0\"/>" +
"<TextBlock Text=\"{Binding Type}\" Margin=\"0,0,10,0\"/>" +
"<TextBlock Text=\"{Binding DayOfWeek}\" Margin=\"0,0,10,0\"/>" +
"<TextBlock Text=\"{Binding DeliveryTime}\" Margin=\"0,0,10,0\"/>" +
"<TextBlock Text=\"{Binding Id}\"/>" +
"</StackPanel>" +
"</DataTemplate>";
var dataTemplate = (DataTemplate)XamlReader.Load(xamlString);
listViewNotifications.ItemTemplate = dataTemplate;
GridMain.Children.Add(listViewNotifications);