使用Linq-to-XML动态生成WPF
本文关键字:WPF 动态 Linq-to-XML 使用 | 更新日期: 2023-09-27 18:20:35
我一直在尝试创建一些动态Xaml。
我有以下c#
private void LoadUI()
{
XNamespace xmlns = "http://schemas.microsoft.com/winfx/2006/xaml/presentation";
dynamic UI = new XElement(xmlns + "Grid",
new XAttribute(XNamespace.Xmlns + "x", "http://schemas.microsoft.com/winfx/2006/xaml"),
new XAttribute("Name", "Grid1"),
new XElement(xmlns + "Grid.ColumnDefinitions",
new XElement(xmlns + "ColumnDefinition", new XAttribute("Width", "100*")),
new XElement(xmlns + "ColumnDefinition", new XAttribute("Width", "200*"))),
new XElement(xmlns + "StackPanel", new XAttribute("Name", "StackLabels"),
new XAttribute("Margin", "3"),
from column in this.TableSchema
where column.IsPrimaryKey == 0 && column.DataType != "timestamp"
select
new XElement(xmlns + "Label", new XAttribute("Height", "28"),
new XAttribute("Name", column.ColumnName + "Label"),
new XAttribute("HorizontalContentAlignment", "Right"),
column.ColumnName)),
new XElement(xmlns + "StackPanel",
new XAttribute("Grid.Column", "1"),
new XAttribute("Name", "StackFields"),
new XAttribute("Margin", "3")
,
from column in this.TableSchema
where column.IsPrimaryKey == 0 && column.DataType != "timestamp"
select
GetUIElement(column)));
this.DynamicContent.Content = XamlReader.Load(UI.CreateReader());
}
我在尝试创建Grid.Column时出错。确切的错误是{"Der unbkanne Member"Grid。Column"kann nicht festgelegt werden"。}
所以它不知道网格。列…
有什么想法吗?
它可以很好地使用新的XAttribute("Grid.Column","1"),注释掉的行并没有自然地显示出我想要的!
生成的网格如下所示:
<Grid xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" Name="Grid1" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="100*" />
<ColumnDefinition Width="200*" />
</Grid.ColumnDefinitions>
<StackPanel Name="StackLabels" Margin="3">
<Label Height="28" Name="NummerLabel" HorizontalContentAlignment="Right">Nummer</Label>
</StackPanel>
<StackPanel Grid.Column="1" Name="StackFields" Margin="3">
<TextBox Height="28" Name="txtNummer" Text="{Binding Path=Nummer}" />
</StackPanel>
</Grid>
编辑:
它是可复制的。XamlReader的交互似乎存在一些问题。使用提供的XmlReader加载。它抛出XamlParseException"无法设置未知成员'Grid.Column'。"
奇怪的是,转换为字符串并从中加载XAML是有效的:
var xml = UI.ToString();
var reader = XmlReader.Create(new StringReader(xml));
var content = XamlReader.Load(reader); // works now.
我看到您创建XML标记只是为了将其转换为UI对象。为什么不简单地从查询中创建UI对象呢?