如何在 VS WPF Design 面板中显示 Collection 数据?
如何让 VS 在设计面板中使用示例数据填充我的 ListView
?
我被难住了。我已经做了相当多的阅读和谷歌搜索,但找不到可靠的答案。在 VS Design 面板中显示虚假数据将大大加快主题化速度,因为我不必每隔几次更改就对其进行调试。
这是我的代码:
XAML:
<ListView DataContext="{Binding}"
Name="PeopleListView">
<ListView.ItemTemplate>
<DataTemplate DataType="Person">
<WrapPanel>
<TextBlock Text="{Binding Path=FirstNameView}"/>
<TextBlock Text="{Binding Path=LastNameView}" />
</WrapPanel>
</DataTemplate>
</ListView.ItemTemplate>
</ListView>
COLLECTION:
public class People : ObservableCollection<Person>
{
public People()
{
this.Add(new Person() { FirstName = "John", LastName = "Doe" });
this.Add(new Person() { FirstName = "John", LastName = "Doe" });
this.Add(new Person() { FirstName = "John", LastName = "Doe" });
}
}
MAIN:
private People PList;
public MainWindow()
{
this.PList = new People();
PeopleListView.ItemsSource = this.PList;
}
编辑&进展:
我通读了 Matt West 提供的链接中的教程。他们非常有帮助。我差一点就明白了。
当设计器尝试显示示例数据时,我遇到了问题。我的示例属性上出现此错误:预期可写属性或集合
。我理解这个错误,我只是不知道如何在不给每个属性提供 set
语句的情况下修复它。
这是我的代码:
Person 类:
public class Person : INotifyPropertyChanged
{
private string _FirstName;
private string _LastName;
public string FirstName
{
get { return this._email; }
set
{
this._FirstName = value;
OnPropertyChanged("FirstName");
OnPropertyChanged("FirstNameView");
}
}
public string LastName
{
get { return this._password; }
set
{
this._LastName = value;
OnPropertyChanged("LastName");
OnPropertyChanged("FirstNameView");
}
}
public string FirstNameView
{
get { return this.FirstName; }
}
public string LastNameView
{
get { return this.LastName; }
}
public event PropertyChangedEventHandler PropertyChanged;
private void OnPropertyChanged(string propertyName) { /*...*/ }
}
PeopleViewSampleData.xaml:
<sample:People xmlns:sample="clr-namespace:MyProgram">
<sample:Person FirstNameView="John" LastNameView="Doe" />
</sample:People>
编辑,解决方案:
按如下方式设置 ItemSource
、DataContext
和 :DataContext
使其正常工作。如果缺少其中任何一个,就不会显示任何内容。
<ListView ItemsSource="{Binding}"
DataContext="{Binding}"
d:DataContext="{d:DesignData Source=/SampleData/PeopleListViewSampleData.xaml}"/>
How do I get VS to populate my ListView
with sample data in the Design panel?
I'm stumped. I've done a fair bit of reading and googling and can't find a solid answer. Showing fake data in the VS Design panel would greatly speed up theming as I wouldn't have to debug it every few changes.
Here is my code:
XAML:
<ListView DataContext="{Binding}"
Name="PeopleListView">
<ListView.ItemTemplate>
<DataTemplate DataType="Person">
<WrapPanel>
<TextBlock Text="{Binding Path=FirstNameView}"/>
<TextBlock Text="{Binding Path=LastNameView}" />
</WrapPanel>
</DataTemplate>
</ListView.ItemTemplate>
</ListView>
COLLECTION:
public class People : ObservableCollection<Person>
{
public People()
{
this.Add(new Person() { FirstName = "John", LastName = "Doe" });
this.Add(new Person() { FirstName = "John", LastName = "Doe" });
this.Add(new Person() { FirstName = "John", LastName = "Doe" });
}
}
MAIN:
private People PList;
public MainWindow()
{
this.PList = new People();
PeopleListView.ItemsSource = this.PList;
}
EDIT & PROGRESS:
I read through the tutorials found in the link provided by Matt West. They were very helpful. I almost got this figured out.
I ran into a problem when the Designer tries to display the Sample Data. I get this error on my sample properties: Writable property or collection expected
. I understand the error, I just don't know how to fix it without giving each property a set
statement.
Here is my code:
Person Class:
public class Person : INotifyPropertyChanged
{
private string _FirstName;
private string _LastName;
public string FirstName
{
get { return this._email; }
set
{
this._FirstName = value;
OnPropertyChanged("FirstName");
OnPropertyChanged("FirstNameView");
}
}
public string LastName
{
get { return this._password; }
set
{
this._LastName = value;
OnPropertyChanged("LastName");
OnPropertyChanged("FirstNameView");
}
}
public string FirstNameView
{
get { return this.FirstName; }
}
public string LastNameView
{
get { return this.LastName; }
}
public event PropertyChangedEventHandler PropertyChanged;
private void OnPropertyChanged(string propertyName) { /*...*/ }
}
PeopleViewSampleData.xaml:
<sample:People xmlns:sample="clr-namespace:MyProgram">
<sample:Person FirstNameView="John" LastNameView="Doe" />
</sample:People>
EDIT, SOLUTION:
Having ItemSource
, DataContext
, and :DataContext
setup as follows made it work. If any of that was missing, nothing would show.
<ListView ItemsSource="{Binding}"
DataContext="{Binding}"
d:DataContext="{d:DesignData Source=/SampleData/PeopleListViewSampleData.xaml}"/>
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评论(1)
我认为您不需要在人员列表视图上设置 DataContext 并设置 ItemsSource。摆脱 DataContext={Binding}。不确定这是否能解决您的设计问题。一般来说,为此使用 d:DesignData 和 d:DesignInstance 属性通常是一个好主意。这是一个教程:
http://karlshifflett.wordpress。 com/2009/10/28/ddesigninstance-ddesigndata-in-visual-studio-2010-beta2/
I don't think you need to set DataContext on the people list view AND set the ItemsSource. Get rid of the DataContext={Binding}. Not sure if this will solve your Design problem or not. In general its usually a good idea to use the d:DesignData and d:DesignInstance properties for this though. Here is a tutorial:
http://karlshifflett.wordpress.com/2009/10/28/ddesigninstance-ddesigndata-in-visual-studio-2010-beta2/