MetaModel.GetTable Method

Reference

Definition

Namespace:: System.Web.DynamicData

Assembly:: System.Web.DynamicData.dll

Important

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Returns the metadata that describes a data model table.

Overloads

GetTable(String, Type)	Returns the metadata that describes the specified table.
GetTable(Type)	Returns the metadata that describes the specified table.
GetTable(String)	Returns the metadata that is associated with the specified table.

Examples

The following example shows how to use the GetTable overloaded methods to perform the following tasks:

Get the MetaTable object for the specified table.
Access the metadata information that is contained by the MetaTable object.

The example consists of a page and its code-behind file.

<%@ Page Language="C#" AutoEventWireup="true" 
CodeFile="GetTable.aspx.cs" 
Inherits="DocGetTable" %>

<!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></title>
</head>
<body>
    <h2>GetTable Methods</h2>

    <form runat="server">
  
     <asp:GridView ID="GridDataSource1" runat="server"
        AutoGenerateColumns="false"
        DataSourceID="LinqDataSource1"
        AllowPaging="true">
        <Columns>
          <asp:DynamicField DataField="FirstName" />
          <asp:DynamicField DataField="LastName" />
          <asp:TemplateField HeaderText="Addresses">
            <ItemTemplate>
              <%# GetAdresses(2)%>
            </ItemTemplate>
          </asp:TemplateField>
        </Columns>
      </asp:GridView>
        
    </form>
    
     <asp:LinqDataSource ID="LinqDataSource1" runat="server" 
        TableName="Customers"
        ContextTypeName="AdventureWorksLTDataContext" >
      </asp:LinqDataSource>
</body>

<%@ Page Language="VB" AutoEventWireup="false" 
CodeFile="GetTable.aspx.vb" 
Inherits="GetTable" %>

<html xmlns="http://www.w3.org/1999/xhtml">
<head id="Head1" runat="server">
  <title></title>
</head>
<body>
    <h2>GetTable Methods</h2>

    <form id="Form1" runat="server">
  
     <asp:GridView ID="GridDataSource1" runat="server"
        AutoGenerateColumns="false"
        DataSourceID="LinqDataSource1"
        AllowPaging="true">
        <Columns>
          <asp:DynamicField DataField="FirstName" />
          <asp:DynamicField DataField="LastName" />
          <asp:TemplateField HeaderText="Addresses">
            <ItemTemplate>
              <%# GetAdresses(2)%>
            </ItemTemplate>
          </asp:TemplateField>
        </Columns>
      </asp:GridView>
        
    </form>
    
     <asp:LinqDataSource ID="LinqDataSource1" runat="server" 
        TableName="Customers"
        ContextTypeName="AdventureWorksLTDataContext" >
      </asp:LinqDataSource>
</body>

using System;
using System.Collections;
using System.Configuration;
using System.Data;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;
using System.Web.DynamicData;
using System.Text;

public partial class DocGetTable : System.Web.UI.Page
{
     protected void Page_Load(object sender, EventArgs e) 
     {
     }

    // Use GetTable methods.
    public string GetAdresses(int index)
    {
        // Get the default data model.
        MetaModel model = MetaModel.Default;
   
        MetaTable mTable;

        switch (index)
        {
            case 0:
                // Get the metatable for the table with the
                // specified entity type.
                mTable = model.GetTable(typeof(CustomerAddress));
                break;
            case 1:
                // Get the metatable for the table with the 
                // specified table name.
                mTable = model.GetTable("CustomerAddresses");
                break;
            case 2:
                // Get the metatable for the table with the 
                // specified table name and the specified data
                // context.
                mTable = model.GetTable("CustomerAddresses", typeof(AdventureWorksLTDataContext));
                break;
            default:
                mTable = model.GetTable(typeof(CustomerAddress));
                break;
        }

        // The following code dislays the actual value 
        // (adress) associated with a customer and link
        // to the related Addresses table.
        MetaForeignKeyColumn fkColumn = 
            (MetaForeignKeyColumn)mTable.GetColumn("Address");

        Customer row = (Customer)GetDataItem();

        StringBuilder addressList = new StringBuilder();

        foreach (CustomerAddress childRow in row.CustomerAddresses)
        {
            addressList.Append(childRow.AddressType);
            addressList.Append(":<br/>");
            addressList.Append("<a href='");
            addressList.Append(fkColumn.GetForeignKeyDetailsPath(childRow.Address));
            addressList.Append("'>");
            addressList.Append(childRow.Address.AddressLine1);
            addressList.Append("</a><br/><br/>");
        }

        return addressList.ToString();
    }
}

Imports System.Collections
Imports System.Configuration
Imports System.Data
Imports System.Linq
Imports System.Web
Imports System.Web.Security
Imports System.Web.UI
Imports System.Web.UI.HtmlControls
Imports System.Web.UI.WebControls
Imports System.Web.UI.WebControls.WebParts
Imports System.Xml.Linq
Imports System.Web.DynamicData
Imports System.Text

Partial Public Class DocGetTable
    Inherits System.Web.UI.Page
     Protected Sub Page_Load(ByVal sender As Object, ByVal e As EventArgs)

     End Sub

    ' Use GetTable methods.
    Public Function GetAdresses(ByVal index As Integer) As String
        ' Get the default data model.
        Dim model As MetaModel = MetaModel.Default

        Dim mTable As MetaTable

        Select Case index
            Case 0
                ' Get the metatable for the table with the
                ' specified entity type.
                mTable = model.GetTable(GetType(CustomerAddress))
            Case 1
                ' Get the metatable for the table with the 
                ' specified table name.
                mTable = model.GetTable("CustomerAddresses")
            Case 2
                ' Get the metatable for the table with the 
                ' specified table name and the specified data
                ' context.
                mTable = model.GetTable("CustomerAddresses", GetType(AdventureWorksLTDataContext))
            Case Else
                mTable = model.GetTable(GetType(CustomerAddress))
        End Select

        ' The following code dislays the actual value 
        ' (adress) associated with a customer and link
        ' to the related Addresses table.
        Dim fkColumn As MetaForeignKeyColumn = CType(mTable.GetColumn("Address"), MetaForeignKeyColumn)

        Dim row As Customer = CType(GetDataItem(), Customer)


        Dim addressList As New StringBuilder()

        For Each childRow As CustomerAddress In row.CustomerAddresses
            addressList.Append(childRow.AddressType)
            addressList.Append(":<br/>")
            addressList.Append("<a href='")
            addressList.Append(fkColumn.GetForeignKeyDetailsPath(childRow.Address))
            addressList.Append("'>")
            addressList.Append(childRow.Address.AddressLine1)
            addressList.Append("</a><br/><br/>")
        Next childRow

        Return addressList.ToString()

    End Function

End Class

Remarks

The MetaTable object that is returned by the overloaded methods contains the metadata information that is associated with the specified table.

Run an online example of this feature.

GetTable(String, Type)

Returns the metadata that describes the specified table.

public:
 System::Web::DynamicData::MetaTable ^ GetTable(System::String ^ tableName, Type ^ contextType);

public System.Web.DynamicData.MetaTable GetTable (string tableName, Type contextType);

member this.GetTable : string * Type -> System.Web.DynamicData.MetaTable

Public Function GetTable (tableName As String, contextType As Type) As MetaTable

Parameters

tableName: String

The name of the table.

contextType: Type

The data context to search for the table.

Returns

MetaTable

The metadata that describes the specified table.

Exceptions

ArgumentNullException

tablename or contextType is null.

ArgumentException

The context is not registered or the table does not exist in the data context.

Examples

The following example shows how to use the GetTable(String, Type) method to obtain the metadata for the specified table. For a complete example, see GetTable.

// Get the metatable for the table with the 
// specified table name and the specified data
// context.
mTable = model.GetTable("CustomerAddresses", typeof(AdventureWorksLTDataContext));

' Get the metatable for the table with the 
' specified table name and the specified data
' context.
mTable = model.GetTable("CustomerAddresses", GetType(AdventureWorksLTDataContext))

Applies to

GetTable(Type)

Returns the metadata that describes the specified table.

public:
 System::Web::DynamicData::MetaTable ^ GetTable(Type ^ entityType);

public System.Web.DynamicData.MetaTable GetTable (Type entityType);

member this.GetTable : Type -> System.Web.DynamicData.MetaTable

Public Function GetTable (entityType As Type) As MetaTable

Parameters

entityType: Type

The type that identifies the table in the data model.

Returns

MetaTable

The metadata that describes the specified table.

Exceptions

ArgumentNullException

The type was not found in the data model.

Examples

The following example shows how to use the GetTable(Type) method to obtain the metadata for the specified table. For a complete example, see GetTable.

// Get the metatable for the table with the
// specified entity type.
mTable = model.GetTable(typeof(CustomerAddress));

' Get the metatable for the table with the
' specified entity type.
mTable = model.GetTable(GetType(CustomerAddress))

Applies to

GetTable(String)

Returns the metadata that is associated with the specified table.

public:
 System::Web::DynamicData::MetaTable ^ GetTable(System::String ^ uniqueTableName);

public System.Web.DynamicData.MetaTable GetTable (string uniqueTableName);

member this.GetTable : string -> System.Web.DynamicData.MetaTable

Public Function GetTable (uniqueTableName As String) As MetaTable

Parameters

uniqueTableName: String

The name that identifies the table in the data model.

Returns

MetaTable

The metadata that describes the specified table.

Exceptions

ArgumentException

The name was not found in the data model.

Examples

The following example shows how to use the GetTable(String) method to obtain the metadata for the specified table. For a complete example, see GetTable.

// Get the metatable for the table with the 
// specified table name.
mTable = model.GetTable("CustomerAddresses");

' Get the metatable for the table with the 
' specified table name.
mTable = model.GetTable("CustomerAddresses")

Remarks

The name uniquely identifies a table in the data model and is used to generate the related URL for routing.

Applies to

Partilhar via

MetaModel.GetTable Method

Definition

Overloads

Examples

Remarks

GetTable(String, Type)

Parameters

Returns

Exceptions

Examples

See also

Applies to

GetTable(Type)

Parameters

Returns

Exceptions

Examples

See also

Applies to

GetTable(String)

Parameters

Returns

Exceptions

Examples

Remarks

See also

Applies to

Recursos adicionais