在代码隐藏中创建DataTemplate失败

时间:2014-01-08 19:25:23

标签: c# xaml windows-phone-8 datatemplate datatemplateselector

我正在尝试在代码中创建DataTemplate,但我遇到了this asnwer

所以我只是复制并编辑了代码,但它失败了,但是这个例外:

  

System.Windows.ni.dll中的第一次机会异常'System.Windows.Markup.XamlParseException'   未知的解析器错误:扫描程序2147500037. [行:4位置:36]

这是生成的XAML代码:

<DataTemplate
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:simplebackground="clr-namespace:Plugins.Backgrounds.SimpleBackground">
    <simplebackground:SimpleBackground/>
</DataTemplate>

这是我目前在我的页面中使用的XAML代码(这个工作):

<phone:PhoneApplicationPage
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    xmlns:simpleBackground="clr-namespace:Namespace.Backgrounds.SimpleBackground"
    x:Class="Namespace.Backgrounds.SimpleBackground.SimpleBackground" mc:Ignorable="d"
    FontFamily="{StaticResource PhoneFontFamilyNormal}" FontSize="{StaticResource PhoneFontSizeNormal}"
    Foreground="{StaticResource PhoneForegroundBrush}" d:DesignHeight="480" d:DesignWidth="480">

    <phone:PhoneApplicationPage.Resources>
        <DataTemplate x:Key="DataTemplate">
            <simpleBackground:SimpleBackground />
        </DataTemplate>
    </phone:PhoneApplicationPage.Resources>
  .............
<phone:PhoneApplicationPage>

要生成XAML,我正在使用此C#代码:

public static DataTemplate Create(Type type)
{
    var templateString = "<DataTemplate\r\n" +
                         "xmlns=\"http://schemas.microsoft.com/winfx/2006/xaml/presentation\"\r\n" +
                         "xmlns:" + type.Name.ToLowerInvariant() + "=\"clr-namespace:" + type.Namespace + "\">\r\n" +
                         "<" + type.Name.ToLowerInvariant() + ":" + type.Name + "/>\r\n" +
                         "</DataTemplate>";            
    return XamlReader.Load(templateString) as DataTemplate;
}

它出了什么问题? 异常的消息没那么有用:(

1 个答案:

答案 0 :(得分:0)

templateString中的Create包含XamlReader无法找到的元素。您必须将元素所在的程序集添加到命名空间:

public static DataTemplate Create(Type type)
{
    var templateString = 
        "<DataTemplate " +
            "xmlns=\"http://schemas.microsoft.com/winfx/2006/xaml/presentation\" " +                                   
            "xmlns:" + type.Name.ToLowerInvariant() +
                 "=\"clr-namespace:" + type.Namespace +
                 ";assembly=" + type.Assembly.GetName().Name + "\">" +
        "<" + type.Name.ToLowerInvariant() + ":" + type.Name + "/>" +
        "</DataTemplate>";            
    return XamlReader.Load(templateString) as DataTemplate;
}
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