Windows窗体中的DataAnnotations支持 [英] DataAnnotations Support in Windows Forms

问题描述

我想在Windows窗体应用程序(WinForms)中的类和实体上使用数据注释.我使用Windows DataGridViews和Infragistics UltraGrids.我以前已经成功地使用 [DisplayName(要显示的名称")] 属性在DataGridView/UltraGrid上设置列标题文本.

I would like to use data annotations on my classes and entities in a Windows Forms application (WinForms). I use windows DataGridViews and Infragistics UltraGrids. I have previously successfully used the [DisplayName("Name to Display")] attribute to set the column header text on a DataGridView/UltraGrid.

这是非常有益的，因为我可能有几个显示此类的网格，而不是将每个网格配置为显示适当的标题文本，我只需设置一个数据注释即可.

This is very beneficial, because I may have several grids displaying this class, and instead of configuring each grid to display the appropriate header text, I can simply set one data annotation.

我也想使用以下数据注释:

I'd like to make use of the following Data Annotations as well:

• 显示
• [Display(AutoGenerateField = false)]
  • 不显示此列
  • 将此列显示为网格中的第n列
  • 如果此对象是另一个对象的属性，请显示此列值而不是对象类型
  • 使用指定的格式字符串格式化数据
  • 以默认本地货币格式将数据显示为货币

  示例

  给出以下带注释的数据类:

  Given the following annotated data classes:

  public class Item
  {
      //Specifies that the column should not be displayed
      [Display(AutoGenerateField = false)] 
      public int ItemID { get; set; }
  
      //Specifies that the column should be the 1st column in the datagridview
      [Display(Order = 1)]
      public int Name { get; set; }
  
      //Specifies that the column should be the 3rd column in the datagridview
      //Specifies that the column header text should display "Cost" instead of "Price"
      [Display(Order = 3, Name="Cost")]
      //Specifies that the column should be rendered using the default local currency format string
      [DataType(DataType.Currency)]
      public int Price { get; set; }
  
      //Specifies that the column should be the 4th column in the datagridview  
      [Display(Order = 4)]
      //specifies that the column should be rendered using the datetime format string "M/d/yy h:mm tt"
      [DisplayFormat(DataFormatString = "{0:M/d/yy h:mm tt")]
      public DateTime ExpirationDate { get; set; }
  
      //Specifies that the column should be the 2nd column in the datagridview
      [Display(Order = 2)]
      public ItemCategory Category { get; set; }
  }
  //Specifies that the Name column should be displayed, if referenced in a containing object
  [DisplayColumn("Name")] 
  public class ItemCategory
  {
      public int CategoryID { get; set; }
      public string Name { get; set; }
  }
  

  我希望DataGridView呈现如下:

  I would like the DataGridView to render like this:

  +-------+---------------+--------+-----------------+
  |  Name |    Category   |  Cost  |  ExpirationDate |
  +-------+---------------+--------+-----------------+
  | Item1 | Category1Name | $30.45 | 7/23/17 5:22 PM |
  +-------+---------------+--------+-----------------+
  | Item2 | Category1Name | $45.05 | 8/24/17 6:22 PM |
  +-------+---------------+--------+-----------------+
  | Item3 | Category2Name | $35.50 | 9/25/17 7:22 PM |
  +-------+---------------+--------+-----------------+
  

  但是实际上在.Net 4.5.2 WinForms中使用DataGridViews时，数据网格实际上显示如下:

  However in practice with DataGridViews in .Net 4.5.2 WinForms, the datagrid is actually displayed as follows:

  +----+-------+-------+----------------+--------------------+
  | ID |  Name | Price | ExpirationDate |      Category      |
  +----+-------+-------+----------------+--------------------+
  | 1  | Item1 | 30.45 | 7/23/17        | Namespace.Category |
  +----+-------+-------+----------------+--------------------+
  | 2  | Item2 | 45.05 | 8/24/17        | Namespace.Category |
  +----+-------+-------+----------------+--------------------+
  | 3  | Item3 | 35.50 | 9/25/17        | Namespace.Category |
  +----+-------+-------+----------------+--------------------+
  

  文档

  该文档声明ASP.NET和ASP.NET MVC支持它.

  The documentation declares that it is supported in ASP.NET and ASP.NET MVC.

  System.ComponentModel.DataAnnotations命名空间

  System.ComponentModel.DataAnnotations命名空间提供了用于定义ASP.NET MVC和ASP.NET数据控件的元数据的属性类.

  The System.ComponentModel.DataAnnotations namespace provides attribute classes that are used to define metadata for ASP.NET MVC and ASP.NET data controls.

  问题
  看来Windows窗体环境中尚未采用/支持这些类.这是真的吗?

  Questions
  It seems that these classes have not been adopted/supported in the windows forms environment. Is this true?

  是否有一种简单的方法来实现对WinForms中的数据注释的支持?

  Is there a simple way to implement support for the data annotations in WinForms?

  是否有一种简单的方法来注释可用于格式化DataGridView和/或UltraGrid的显示的类/实体?

  Is there a simple way to annotate the classes/entities that can be used to format the display of a DataGridView and/or UltraGrid?

  推荐答案

  Infragistics UltraGrid和Windows DataGridView都不以这种方式支持数据注释.从15.1开始的DevExpress在其数据布局控件中仅对WinForms数据注释提供了有限的支持

  Neither Infragistics UltraGrid nor the Windows DataGridView support data annotations in this manner. DevExpress as of 15.1 has some limited WinForms data annotation support within its Data Layout Control https://community.devexpress.com/blogs/thinking/archive/2015/06/08/winforms-data-layout-control-data-annotation-attributes.aspx.

  我发现此链接，那里有人通过查看元数据来询问有关如何在Infragistics Grid中隐藏列的类似问题:

  I found this link where someone is asking similar questions about how to suppress columns within Infragistics Grid by looking at metadata: http://www.infragistics.com/community/forums/t/91864.aspx

  这篇关于Windows窗体中的DataAnnotations支持的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！