modelBuilder.Entity<ClassA>().Property(t => t.Id).HasDatabaseGeneratedOption(DatabaseGeneratedOption.None);//ClassA的Id属性不用数据库控制生成 设置字段最大长度: modelBuilder.Entity<ClassA>().Property(t => t.Name).HasMaxLength(100);//设置ClassA类的Name属性的最大长度为100,如果值长度100,会...
Nadkarni et al., " Data Extraction and Ad Hoc Query of an Entity-Attribute-Value Database ", Journal of the American Medical Informatics Association, vol. 5, No. 6, Nov./Dec. 1998, pp. 511-527.Data extraction and ad hoc query of an entityattribute-value database - Prakash, Cynthia ...
EntityPropertyMappingAttribute.TargetNamespaceUri 属性参考 反馈 定义命名空间: System.Data.Services.Common 程序集: System.Data.Services.Client.dll 获取一个字符串值,该值指定由 TargetPath 属性指定的元素的命名空间 URI。 C# 复制 public string TargetNamespaceUri { get; } 属性值 Strin...
Staged Entity Attribute Staged Metadata Async Operation Staged Source Control Component StageSolutionUpload Subject Subscription Manually Tracked Object Subscription Statistic Offline Subscription Statistic Outlook Subscription Sync Entry Offline Subscription Sync Entry Outlook SupportUserTable Synapse Database Syna...
組件: System.Data.Entity.dll 屬性,表示此類別 (Class) 代表實體類型。C# 複製 [System.AttributeUsage(System.AttributeTargets.Class, AllowMultiple=false)] public sealed class EdmEntityTypeAttribute : System.Data.Objects.DataClasses.EdmTypeAttribute繼承 Object Attribute EdmTypeAttribute EdmEntityTypeAttribu...
[Association(Name="FK_Orders_Customers", Storage="_Customer", ThisKey="CustomerID", IsForeignKey=true)] public Customer Customer { get { return this._Customer.Entity; } set { Customer previousValue = this._Customer.Entity; if (((previousValue != value) || (this._Customer.HasLoadedOrAssig...
IsCustomizable True ReferencedEntityNavigationPropertyName relationshipattribute_MailboxTrackingFolders AssociatedMenuConfiguration Behavior: DoNotDisplayGroup: DetailsLabel: Order: CascadeConfiguration Assign: NoCascadeDelete: CascadeMerge: NoCascadeReparent: NoCascadeShare: NoCascadeUnshare: NoCascaderelationship...
Puts all XmlText nodes in the full depth of the sub-tree underneath this XmlNode into a "normal" form where only markup (that is, tags, comments, processing instructions, CDATA sections, and entity references) separates XmlText nodes, that is, there are no adjacent XmlText nodes. (Inherite...
TheEntity-Attribute-Value(EAV) model added flexibility to the relational model: now, every item could be defineddifferentlyfrom each other in the same database. EAV was all about heterogeneity — allowing a single database to contain a wide variety of information in an efficient manner, where ...
How do attributes relate to database management? In databases, attributes represent properties of entities and can have specific values for each entity. 3 Are all variables in programming mutable? No, some programming languages have immutable variables whose values cannot be changed once set. 2 Can...