EntityConnectionStringBuilder 类

定义

public ref class EntityConnectionStringBuilder sealed : System::Data::Common::DbConnectionStringBuilder

public sealed class EntityConnectionStringBuilder : System.Data.Common.DbConnectionStringBuilder

type EntityConnectionStringBuilder = class
    inherit DbConnectionStringBuilder

Public NotInheritable Class EntityConnectionStringBuilder
Inherits DbConnectionStringBuilder

继承

Object

DbConnectionStringBuilder

EntityConnectionStringBuilder

示例

下面的示例演示如何配合使用 EntityConnectionStringBuilder 和 SqlConnectionStringBuilder。

// Specify the provider name, server and database.
string providerName = "System.Data.SqlClient";
string serverName = ".";
string databaseName = "AdventureWorks";

// Initialize the connection string builder for the
// underlying provider.
SqlConnectionStringBuilder sqlBuilder =
    new SqlConnectionStringBuilder();

// Set the properties for the data source.
sqlBuilder.DataSource = serverName;
sqlBuilder.InitialCatalog = databaseName;
sqlBuilder.IntegratedSecurity = true;

// Build the SqlConnection connection string.
string providerString = sqlBuilder.ToString();

// Initialize the EntityConnectionStringBuilder.
EntityConnectionStringBuilder entityBuilder =
    new EntityConnectionStringBuilder();

//Set the provider name.
entityBuilder.Provider = providerName;

// Set the provider-specific connection string.
entityBuilder.ProviderConnectionString = providerString;

// Set the Metadata location.
entityBuilder.Metadata = @"res://*/AdventureWorksModel.csdl|
                            res://*/AdventureWorksModel.ssdl|
                            res://*/AdventureWorksModel.msl";
Console.WriteLine(entityBuilder.ToString());

using (EntityConnection conn =
    new EntityConnection(entityBuilder.ToString()))
{
    conn.Open();
    Console.WriteLine("Just testing the connection.");
    conn.Close();
}

' Specify the provider name, server and database.
Dim providerName As String = "System.Data.SqlClient"
Dim serverName As String = "."
Dim databaseName As String = "AdventureWorks"

' Initialize the connection string builder for the
' underlying provider.
Dim sqlBuilder As New SqlConnectionStringBuilder

' Set the properties for the data source.
sqlBuilder.DataSource = serverName
sqlBuilder.InitialCatalog = databaseName
sqlBuilder.IntegratedSecurity = True

' Build the SqlConnection connection string.
Dim providerString As String = sqlBuilder.ToString

' Initialize the EntityConnectionStringBuilder.
Dim entityBuilder As New EntityConnectionStringBuilder

'Set the provider name.
entityBuilder.Provider = providerName
' Set the provider-specific connection string.
entityBuilder.ProviderConnectionString = providerString
' Set the Metadata location to the current directory.
entityBuilder.Metadata = "res://*/AdventureWorksModel.csdl|" & _
                            "res://*/AdventureWorksModel.ssdl|" & _
                            "res://*/AdventureWorksModel.msl"

Console.WriteLine(entityBuilder.ToString)

Using conn As EntityConnection = New EntityConnection(entityBuilder.ToString)
    conn.Open()
    Console.WriteLine("Just testing the connection.")
    conn.Close()
End Using

注解

通过连接字符串生成器，开发人员可以使用该类的属性和方法，以编程方式创建语法正确的连接字符串以及分析和重新生成现有的连接字符串。 连接字符串生成器提供了与已知关键字/值对相对应的强类型属性。 必须在应用程序中创建连接字符串的开发人员可以使用 EntityConnectionStringBuilder 类生成和修改连接字符串。

EntityConnectionStringBuilder 对关键字/值对的有效性进行检查，其中每个关键字/值对都被公开为一个 EntityConnectionStringBuilder 属性值。

另请参阅

• EntityConnection
• 连接字符串
• 使用 EntityClient