我正在尝试将DataTemplate应用于我自动生成的列。我可以用一个简单的模板做到这一点。但是我想要一个组合框,文本绑定到数据网格,椭圆显示基于此值的颜色通过转换器。
我尝试了两种方法。首先在代码隐藏中创建模板并通过xamlReader加载它。
private void LeftPanel_AutoGeneratingColumn(
object sender, DataGridAutoGeneratingColumnEventArgs e)
{
DataGridTemplateColumn col = new DataGridTemplateColumn();
col.Header = e.Column.Header;
string xaml =
"<DataTemplate xmlns:local=\"clr-namespace:myView\">" +
"<DataTemplate.Resources><local:goColorConverter x:Key=\"goColorConverter\" /></DataTemplate.Resources>" +
"<ComboBox " +
"SelectedValue=\"{Binding [" + e.Column.Header +
"], Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}\" Width=\"85\" " +
"ItemsSource=\"{Binding Path=DataContext.goNoGo, RelativeSource={RelativeSource AncestorType={x:Type UserControl}}}\">" +
"<ComboBox.ItemTemplate><DataTemplate><StackPanel Orientation=\"Horizontal\">" +
"<Ellipse Fill=\"{Binding Converter={StaticResource goColorConverter}}\" Height=\"14\" Width=\"14\" HorizontalAlignment=\"Right\"/>" +
"<TextBlock Text=\"{Binding}\" Padding=\"5 0\"/>" +
"</StackPanel></DataTemplate></ComboBox.ItemTemplate></ComboBox></DataTemplate>";
var sr = new MemoryStream(Encoding.ASCII.GetBytes(xaml));
var pc = new ParserContext();
pc.XmlnsDictionary.Add("", "http://schemas.microsoft.com/winfx/2006/xaml/presentation");
pc.XmlnsDictionary.Add("x", "http://schemas.microsoft.com/winfx/2006/xaml");
var datatemplate = (DataTemplate)XamlReader.Load(sr, pc);
col.CellTemplate = datatemplate;
col.CellEditingTemplate = datatemplate;
e.Column = col;
return;
}
这使我能够正确绑定数据,但我无法使用转换器进行编译。我得到错误无法为我的转换器创建未知类型(生活在我的代码后面)。我看过很多关于装配的帖子但是不能用它来帮助我。
我的第二种方法是在xaml中定义模板并将其应用于我的代码中。这使得转换器工作,但我不知道如何定义我选择的值绑定,因为我在执行之前不知道列名。我希望使用此Josh smith FindName example,但我不知道如何访问内容演示者。
代码:
private void LeftPanel_AutoGeneratingColumn(
object sender, DataGridAutoGeneratingColumnEventArgs e)
{
DataGridTemplateColumn col = new DataGridTemplateColumn();
col.Header = e.Column.Header;
col.CellTemplate = (DataTemplate)Resources["goDropColumn"];
col.CellEditingTemplate = (DataTemplate)Resources["goDropColumn"];
//Do magic here to get combo box and update its binding
e.Column = col;
return;
}
XAML:
<DataTemplate x:Key="goDropColumn">
<ComboBox Name="combo" Width="85" ItemsSource="{Binding Path=DataContext.goNoGo,
RelativeSource={RelativeSource AncestorType={x:Type UserControl}}}"
SelectedValue="{Binding ???}">
<ComboBox.ItemTemplate>
<DataTemplate>
<StackPanel Orientation="Horizontal">
<Ellipse Fill="{Binding Converter={StaticResource goColorConverter}}"
Height="14" Width="14"/>
<TextBlock Text="{Binding}" Padding="5 0"/>
</StackPanel>
</DataTemplate>
</ComboBox.ItemTemplate>
</ComboBox>
</DataTemplate>
我没有和我的方法结婚,并且是WPF和c#的新手,所以如果方法完全错误,请告诉我。我觉得第二种方法更清洁,如果我可以更改标有???的绑定,它会工作吗?到列名。
Another possibly relevant article但我没有自定义数据类型,我只想将selectedValue绑定到该列。
MachineLearning要求的更新代码:
DataGridTemplateColumn col = new DataGridTemplateColumn();
col.Header = e.Column.Header;
string xaml =
@"<DataTemplate x:Key=""goDropColumn""
xmlns:local=""clr-namespace:RP_SIL.View;assembly=RP_SIL.View""
xmlns=""http://schemas.microsoft.com/winfx/2006/xaml/presentation""
xmlns:x = ""http://schemas.microsoft.com/winfx/2006/xaml"">
<ComboBox SelectedValue=""{Binding [" + e.Column.Header + @"], Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}""
Width=""85""
ItemsSource=""{Binding Path=DataContext.goNoGo, RelativeSource={RelativeSource AncestorType={x:Type UserControl}}}"">
<ComboBox.Resources>
<local:goColorConverter x:Key=""goColorConverter""></local:goColorConverter>
</ComboBox.Resources>
<ComboBox.ItemTemplate>
<DataTemplate>
<StackPanel Orientation=""Horizontal"">
<Ellipse Fill=""{Binding Converter={StaticResource goColorConverter}}"" Height=""14"" Width=""14"" HorizontalAlignment=""Right""/>
<TextBlock Text=""{Binding}"" Padding=""5 0""/>
</StackPanel>
</DataTemplate>
</ComboBox.ItemTemplate>
</ComboBox>
</DataTemplate>";
//Binding Converter={StaticResource goColorConverter
var sr = new MemoryStream(Encoding.ASCII.GetBytes(xaml));
var pc = new ParserContext();
pc.XmlnsDictionary.Add("", "http://schemas.microsoft.com/winfx/2006/xaml/presentation");
pc.XmlnsDictionary.Add("x", "http://schemas.microsoft.com/winfx/2006/xaml");
pc.XmlnsDictionary.Add("local", "clr-namespace:RP_SIL.View;assembly=RP_SIL.View");
var datatemplate = (DataTemplate)XamlReader.Load(sr, pc);
col.CellTemplate = datatemplate;
col.CellEditingTemplate = datatemplate;
非常感谢机器学习他的时间和解决问题!
答案 0 :(得分:0)
欢迎。 在{xaml中加载转换器有trick。
这是我演示的代码,作为一个例子。
string MyBoolName = "IsEnabled";
string MyTextName = "Title";
string xaml =
@"<DataTemplate
xmlns:local=""clr-namespace:Templating;assembly=Templating""
x:Key=""goDropColumn"">
<ComboBox Name=""combo"" Width=""85"" ItemsSource=""{Binding Path=DataContext.MyThings,
RelativeSource={RelativeSource AncestorType={x:Type DataGrid}}}""
> <!-- SelectedValue=""{Binding ???}"" -->
<ComboBox.Resources>
<local:BrushColorConverter x:Key=""goColorConverter""></local:BrushColorConverter>
</ComboBox.Resources>
<ComboBox.ItemTemplate>
<DataTemplate>
<StackPanel Orientation=""Horizontal"">
<Ellipse Fill=""{Binding ""{Binding "+ MyBoolName + @"}"", Converter={StaticResource goColorConverter}}""
Height=""14"" Width=""14"" />
<TextBlock Text=""{Binding " + MyTextName + @"}"" Padding=""5 0""/>
</StackPanel>
</DataTemplate>
</ComboBox.ItemTemplate>
</ComboBox>
</DataTemplate>";