将实体添加到模型

2025-08-08

若要创建实体，请将实体控件从 Visual Studio“工具箱”添加到业务数据连接 (BDC) 设计器。

将实体添加到模型

创建 BDC 项目，或打开现有 BDC 项目。有关详细信息，请参阅创建业务数据连接模型。
在“工具箱”中，从“BusinessDataCatalog”组中将“实体”控件添加到设计器上。

新实体将显示在设计器上。 Visual Studio 将 <Entity> 元素添加到你项目中的 BDC 模型文件的 XML。有关 Entity 元素特性的详细信息，请参阅 Entity。
在设计器上，打开实体的快捷菜单，选择“添加”，然后选择“标识符” 。

实体上会显示一个新标识符。

注意

可以在“属性”窗口中更改实体和标识符的名称。

定义类中实体的字段。你可以向项目添加新的类或使用通过对象关系设计器（O/R 设计器）等其他工具创建的现有类。以下示例演示名为 Contact 的实体类。

public partial class Contact
{
    public int ContactID { get; set; }
    public string FirstName { get; set; }
    public string LastName { get; set; }
    public string EmailAddress { get; set; }
    public string Phone { get; set; }
    public int EmailPromotion { get; set; }
    public bool NameStyle { get; set; }
    public string PasswordHash { get; set; }
    public string PasswordSalt { get; set; }

}

Partial Public Class Contact

    Private _ContactID As Integer
    Public Property ContactID() As Integer
        Get
            Return _ContactID
        End Get
        Set(ByVal value As Integer)
            _ContactID = value
        End Set
    End Property
    Private _FirstName As String
    Public Property FirstName() As String
        Get
            Return _FirstName
        End Get
        Set(ByVal value As String)
            _FirstName = value
        End Set
    End Property
    Private _LastName As String
    Public Property LastName() As String
        Get
            Return _LastName
        End Get
        Set(ByVal value As String)
            _LastName = value
        End Set
    End Property
    Private _EmailAddress As String
    Public Property EmailAddress() As String
        Get
            Return _EmailAddress
        End Get
        Set(ByVal value As String)
            _EmailAddress = value
        End Set
    End Property
    Private _Phone As String
    Public Property Phone() As String
        Get
            Return _Phone
        End Get
        Set(ByVal value As String)
            _Phone = value
        End Set
    End Property
    Private _EmailPromotion As Integer
    Public Property EmailPromotion() As Integer
        Get
            Return _EmailPromotion
        End Get
        Set(ByVal value As Integer)
            _EmailPromotion = value
        End Set
    End Property
    Private _NameStyle As Boolean
    Public Property NameStyle() As Boolean
        Get
            Return _NameStyle
        End Get
        Set(ByVal value As Boolean)
            _NameStyle = value
        End Set
    End Property
    Private _PasswordHash As String
    Public Property PasswordHash() As String
        Get
            Return _PasswordHash
        End Get
        Set(ByVal value As String)
            _PasswordHash = value
        End Set
    End Property
    Private _PasswordSalt As String
    Public Property PasswordSalt() As String
        Get
            Return _PasswordSalt
        End Get
        Set(ByVal value As String)
            _PasswordSalt = value
        End Set
    End Property

End Class

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