为什么 DataAnnotations使用带有 AutoGenerateColumns=“True” 的 DataGrid 时被忽略

发布于 2024-10-20 23:00:17 字数 399 浏览 7 评论 0原文

我正在使用 WPF DataGrid 绑定到自定义类的集合。在网格 XAML 中使用 AutoGenerateColumns="True"，可以很好地创建和填充网格，但正如人们所期望的那样，标题是属性名称。

我尝试

<Display(Name:="My Name")>

从 System.ComponentModel.DataAnnotations 命名空间指定，但这没有效果。我还尝试

<DisplayName("My Name")>

从 System.ComponentModel 命名空间，但标题仍然不受影响。

是否无法使用 AutoGenerateColumns 选项指定列标题？

原文

I'm using the WPF DataGrid to bind to a collection of a custom class. Using AutoGenerateColumns="True" in the grid XAML, the grid is created and populated just fine, but the headings are the property names, as one would expect.

I tried specifying

<Display(Name:="My Name")>

from the System.ComponentModel.DataAnnotations namespace and that has no effect. I also tried

<DisplayName("My Name")>

from the System.ComponentModel name space but still the headings are not affected.

Is there no way to specify column headings with the AutoGenerateColumns option?

分享到QQ

分享到微博

如果你对这篇内容有疑问，欢迎到本站社区发帖提问参与讨论，获取更多帮助，或者扫码二维码加入 Web 技术交流群。

发布评论

需要登录才能够评论，你可以免费注册一个本站的账号。

不甘平庸 2024-10-27 23:00:17

使用@Marc的建议是解决方案的开始，但就其本身而言，自动生成的列仍然将属性名称作为标题。

要获取 DisplayName，您需要添加一个例程（在后面的代码中）来处理 GridAutoGenerateColumn 事件：

Private Sub OnGeneratingColumn(sender As Object, e As System.Windows.Controls.DataGridAutoGeneratingColumnEventArgs) Handles Grid.AutoGeneratingColumn
    Dim pd As System.ComponentModel.PropertyDescriptor = e.PropertyDescriptor
    e.Column.Header = pd.DisplayName
End Sub

另一个更好的解决方案是使用 ComponentModel.DataAnnotations 命名空间并指定 ShortName：

Public Class modelQ016
    <Display(shortname:="DB Name")>
    Public Property DBNAME As String
    ...

OnGenerateColumn 变为：

        Dim pd As System.ComponentModel.PropertyDescriptor = e.PropertyDescriptor
        Dim DisplayAttrib As System.ComponentModel.DataAnnotations.DisplayAttribute =
            pd.Attributes(GetType(ComponentModel.DataAnnotations.DisplayAttribute))
        If Not DisplayAttrib Is Nothing Then
            e.Column.Header = DisplayAttrib.ShortName
        End If

请注意，属性中的顺序属性数组发生变化，因此您必须使用 GetType(...) 而不是数字参数...真有趣！

Using @Marc's suggestion was the beginning of the solution, but taken on it's own, the AutoGenerated columns still have the property names as headings.

To get the DisplayName, you need to add a routine (in the code behind) to handle the GridAutoGeneratingColumn event:

Private Sub OnGeneratingColumn(sender As Object, e As System.Windows.Controls.DataGridAutoGeneratingColumnEventArgs) Handles Grid.AutoGeneratingColumn
    Dim pd As System.ComponentModel.PropertyDescriptor = e.PropertyDescriptor
    e.Column.Header = pd.DisplayName
End Sub

An additional and better solution is to use the ComponentModel.DataAnnotations namespace and specify ShortName:

Public Class modelQ016
    <Display(shortname:="DB Name")>
    Public Property DBNAME As String
    ...

OnGeneratingColumn becomes:

        Dim pd As System.ComponentModel.PropertyDescriptor = e.PropertyDescriptor
        Dim DisplayAttrib As System.ComponentModel.DataAnnotations.DisplayAttribute =
            pd.Attributes(GetType(ComponentModel.DataAnnotations.DisplayAttribute))
        If Not DisplayAttrib Is Nothing Then
            e.Column.Header = DisplayAttrib.ShortName
        End If

Note that the order of attributes in the attribute array changes, so you must use the GetType(...) instead of a numeric parameter... Such fun!

回复收藏 0 原文

红ご颜醉 2024-10-27 23:00:17

您可以尝试旧的 System.ComponentModel.DisplayNameAttribute。用 C# 语言来说，[DisplayName("My Name")]。特别是，这适用于 PropertyDescriptor，它支持大量数据绑定。

回复收藏 0 原文

无人问我粥可暖 2024-10-27 23:00:17

通过使用 @GilShalit 帖子，如果您此时在 C# 中使用资源（您可能应该支持多文化语言支持），则需要添加以下内容

带有注释的属性声明

[Display(ResourceType = typeof (YourStronglyTypedMessagesResource), Name = "YourGridColumnName")]
public string Column1 { get; set; }

<事件处理程序

private void DataGrid_OnAutoGeneratingColumn(object sender, DataGridAutoGeneratingColumnEventArgs e)
{
    var pd = (PropertyDescriptor)e.PropertyDescriptor;
    var atb = (DisplayAttribute)pd.Attributes[typeof(DisplayAttribute)];
    if (atb != null)
    {
        e.Column.Header = atb.GetName();
    }
}

By using @GilShalit post upon, this is what is needed to add in case that you are using Resources (as you probably should for multi culture language support) in C# in this time

Your property Declaration with Annotation

[Display(ResourceType = typeof (YourStronglyTypedMessagesResource), Name = "YourGridColumnName")]
public string Column1 { get; set; }

Event handler

private void DataGrid_OnAutoGeneratingColumn(object sender, DataGridAutoGeneratingColumnEventArgs e)
{
    var pd = (PropertyDescriptor)e.PropertyDescriptor;
    var atb = (DisplayAttribute)pd.Attributes[typeof(DisplayAttribute)];
    if (atb != null)
    {
        e.Column.Header = atb.GetName();
    }
}

回复收藏 0 原文

~没有更多了~