MetaModel Class
Represents one or multiple databases that are used by ASP.NET Dynamic Data.
Assembly: System.Web.DynamicData (in System.Web.DynamicData.dll)
The MetaModel type exposes the following members.
| Name | Description | |
|---|---|---|
![]() | MetaModel() | Instantiates a new instance of the MetaModel class. |
![]() | MetaModel(Boolean) | Instantiates a new instance of the MetaModel class. |
| Name | Description | |
|---|---|---|
![]() ![]() | Default | Gets the first instance of a data model that is created by the application. |
![]() | DynamicDataFolderVirtualPath | Gets or sets the virtual path of the DynamicData folder in the Web site. |
![]() | EntityTemplateFactory | Gets or sets the EntityTemplateFactory object that is associated with the model. |
![]() | FieldTemplateFactory | Gets or sets a custom IFieldTemplateFactory interface. |
![]() | FilterFactory | Gets or sets the FilterFactory object that is associated with the model. |
![]() | Tables | Gets a collection of all the tables that are part of the data model. |
![]() | VisibleTables | Gets a collection of the visible tables in the data model. |
| Name | Description | |
|---|---|---|
![]() | CreateTable | Instantiates a MetaTable object. |
![]() | Equals(Object) | Determines whether the specified Object is equal to the current Object. (Inherited from Object.) |
![]() | Finalize | Allows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection. (Inherited from Object.) |
![]() | GetActionPath | Returns the action path that is associated with a specific table. |
![]() | GetHashCode | Serves as a hash function for a particular type. (Inherited from Object.) |
![]() ![]() | GetModel | Returns the data-model instance for the specified context. |
![]() | GetTable(String) | Returns the metadata that is associated with the specified table. |
![]() | GetTable(Type) | Returns the metadata that describes the specified table. |
![]() | GetTable(String, Type) | Returns the metadata that describes the specified table. |
![]() | GetType | Gets the Type of the current instance. (Inherited from Object.) |
![]() | MemberwiseClone | Creates a shallow copy of the current Object. (Inherited from Object.) |
![]() | RegisterContext(DataModelProvider) | Registers a data context instance by using a data-model provider |
![]() | RegisterContext(Func<Object>) | Registers the data context that is specified by a context factory. |
![]() | RegisterContext(Type) | Registers a data-context instance. |
![]() | RegisterContext(DataModelProvider, ContextConfiguration) | Registers a data-context instance by using the specified context configuration and by enabling a data-model provider. |
![]() | RegisterContext(Func<Object>, ContextConfiguration) | Registers a data-context instance by using the specified context configuration and by enabling a custom constructor. |
![]() | RegisterContext(Type, ContextConfiguration) | Registers a data-context instance by using the specified context configuration. |
![]() ![]() | ResetRegistrationException | Resets any previous context registration error that might have occurred. |
![]() | ToString | Returns a string that represents the current object. (Inherited from Object.) |
![]() | TryGetTable(String, MetaTable%) | Attempts to get the metadata that is associated with the specified table. |
![]() | TryGetTable(Type, MetaTable%) | Attempts to get the metadata that is associated with the specified table. |
| Exception | Condition |
|---|---|
| InvalidOperationException | Can be thrown by any method if there has been a data context registration error. |
The MetaModel type lets you register one or multiple data contexts for a Dynamic Data Web application.
A data context is an object that represents a database connection. A data context has access to one data model which represents a database that is available through that connection. A data model is an object that represents a database's data entities as CLR types. Dynamic Data supports data models based on LINQ to SQL and on the ADO.NET Entity Framework.
In Visual Studio 2010, you can generate data-model types by using the LINQ to SQL Classes template or the ADO.NET Entity Data Model template. These templates use the Object Relational Designer (O/R Designer) for the LINQ to SQL model, or the ADO.NET Entity Data Model Designer (Entity Designer) for the Entity Framework model.
The following example shows how to use MetaModel type to perform the following tasks in order to use automatic scaffolding in an ASP.NET Web site:
Get the data model for the default data context.
Get the data model for a specified data context.
Evaluate the routing path (determine the URL) for a specified table.
The example consists of a page and its code-behind file.
<%@ Page Language="VB" AutoEventWireup="false" CodeFile="PathModel.aspx.vb" Inherits="PathModel" %> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head id="Head1" runat="server"> <title>Path Model</title> </head> <body> <asp:DynamicDataManager ID="DynamicDataManager1" runat="server" AutoLoadForeignKeys="true" /> <h3>GetActionPath</h3> <form id="form1" runat="server"> <asp:GridView ID="GridDataSource1" runat="server" AutoGenerateColumns="false" DataSourceID="LinqDataSource1" AllowPaging="true"> <Columns> <asp:TemplateField> <ItemTemplate> <asp:HyperLink ID="HyperLink1" runat="server" NavigateUrl="<%#EvaluateActionPath()%>">ListDetails</asp:HyperLink> </ItemTemplate> </asp:TemplateField> <asp:DynamicField DataField="FirstName" /> <asp:DynamicField DataField="LastName" /> </Columns> </asp:GridView> <asp:LinqDataSource ID="LinqDataSource1" runat="server" TableName="Customers" ContextTypeName="AdventureWorksLTDataContext" > </asp:LinqDataSource> </form> </body> </html>
using System; using System.Web.DynamicData; using System.ComponentModel.DataAnnotations; using System.ComponentModel; [MetadataType(typeof(ProductMetaData))] public partial class Product { } public class ProductMetaData { }
To compile the example, you need the following:
Visual Studio 2010 or Visual Web Developer 2010 Express.
A Dynamic Data Web site. For more information, see Walkthrough: Creating a New Dynamic Data Web Site Using Scaffolding.
See a run-time code example of this feature: Run.
Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.



