Silverlight 4.0 System.Data.EntityClient未被代码识别，但被web.config识别

当我简单地运行这个项目时，数据是从服务器获取的，没有问题，但是需要在代码中包含连接字符串

根据网上的资料，我做了以下几点，但就是不能解决这个错误

错误

在配置中找不到指定的存储提供程序，或者该提供程序无效

域名服务

公共类域服务1:LinqToEntitiesDomainService
{
公共覆盖无效初始化（DomainServiceContext上下文）
{
EntityConnectionStringBuilder=新的EntityConnectionStringBuilder（）；
builder.Provider=“System.Data.EntityClient”；
builder.ProviderConnectionString=@“数据源=A-63A9D4D7E7834\THIRD；初始目录=EMPLOYEE；集成安全性=True；”；
builder.Metadata=string.Format（@“res://*/{0}.csdl）|
res://*/{0}.ssdl|
res://*/{0}.msl，“Model1”）；
this.ObjectContext.Connection.ConnectionString=builder.ConnectionString；
初始化（上下文）；
}

web.config

由于“System.Data.EntityClient”是许多名称空间/lib的组合，因此无法识别

正确的方法是

public IQueryable<Table1> GetTable1()
{



    // Specify the provider name, server and database.
    string providerName = "System.Data.SqlClient";
    string serverName = @"A-63A9D4D7E7834\THIRD";
    string databaseName = "EMPLOYEE";

    // 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;
    sqlBuilder.MultipleActiveResultSets=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;


    // <add name="EMPLOYEEEntities" connectionString="metadata=res://*/Models.Model1.csdl|res://*/Models.Model1.ssdl|res://*/Models.Model1.msl;provider=System.Data.SqlClient;provider connection string=&quot;Data Source=A-63A9D4D7E7834\THIRD;Initial Catalog=EMPLOYEE;Integrated Security=True;MultipleActiveResultSets=True&quot;" providerName="System.Data.EntityClient" />



    // Set the Metadata location.
    entityBuilder.Metadata = @"res://*/Models.Model1.csdl|
                    res://*/Models.Model1.ssdl|
                    res://*/Models.Model1.msl";
    Console.WriteLine(entityBuilder.ToString());

   // EntityConnection conn =                 new EntityConnection(entityBuilder.ToString());
    /*
    using (EntityConnection conn =
        new EntityConnection(entityBuilder.ToString()))
    {
        conn.Open();
        Response.Write("this is a web application");
        Console.WriteLine("Just testing the connection.");
        conn.Close();
    }*/

    this.ObjectContext.Connection.ConnectionString = entityBuilder.ToString();
   // this.ObjectContext.Connection.Open();
  // this.ObjectContext.Connection.BeginTransaction();

   //  this.ObjectContext.Table1.OrderBy(q => q.ID);

    IQueryable<Table1> results = this.ObjectContext.Table1.OrderBy(q => q.ID);

  //  this.ObjectContext.Connection.Close();

    return results;
}

public IQueryable GetTable1（）
{
//指定提供程序名称、服务器和数据库。
string providerName=“System.Data.SqlClient”；
字符串serverName=@“A-63A9D4D7E7834\THIRD”；
字符串databaseName=“EMPLOYEE”；
//初始化的连接字符串生成器
//基础提供者。
SqlConnectionStringBuilder sqlBuilder=
新的SqlConnectionStringBuilder（）；
//设置数据源的属性。
sqlBuilder.DataSource=serverName；
sqlBuilder.InitialCatalog=数据库名称；
sqlBuilder.IntegratedSecurity=true；
sqlBuilder.MultipleActiveResultSets=True；
//构建SqlConnection字符串。
string providerString=sqlBuilder.ToString（）；
//初始化EntityConnectionStringBuilder。
EntityConnectionStringBuilder entityBuilder=
新EntityConnectionStringBuilder（）；
//设置提供程序名称。
entityBuilder.Provider=providerName；
//设置特定于提供程序的连接字符串。
entityBuilder.ProviderConnectionString=providerString；
// 
//设置元数据位置。
entityBuilder.Metadata=@“res://*/Models.Model1.csdl|
res://*/Models.Model1.ssdl|
res://*/Models.Model1.msl”；
Console.WriteLine（entityBuilder.ToString（））；
//EntityConnection conn=新的EntityConnection（entityBuilder.ToString（））；
/*
使用（实体连接接头）=
新的EntityConnection（entityBuilder.ToString（））
{
conn.Open（）；
Write（“这是一个web应用程序”）；
WriteLine（“只是测试连接”）；
康涅狄格州关闭（）；
}*/
this.ObjectContext.Connection.ConnectionString=entityBuilder.ToString（）；
//this.ObjectContext.Connection.Open（）；
//this.ObjectContext.Connection.BeginTransaction（）；
//this.ObjectContext.Table1.OrderBy（q=>q.ID）；
IQueryable results=this.ObjectContext.Table1.OrderBy（q=>q.ID）；
//this.ObjectContext.Connection.Close（）；
返回结果；
}

<connectionStrings>
    <add name="EMPLOYEEEntities"
         connectionString="metadata=res://*/Model1.csdl|res://*/Model1.ssdl|res://*/Model1.msl;provider=System.Data.SqlClient;provider connection string=&quot;Data Source=A-63A9D4D7E7834\THIRD;Initial Catalog=EMPLOYEE;Integrated Security=True;MultipleActiveResultSets=True&quot;" 
         providerName="System.Data.EntityClient" />
  </connectionStrings>
  

public IQueryable<Table1> GetTable1()
{



    // Specify the provider name, server and database.
    string providerName = "System.Data.SqlClient";
    string serverName = @"A-63A9D4D7E7834\THIRD";
    string databaseName = "EMPLOYEE";

    // 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;
    sqlBuilder.MultipleActiveResultSets=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;


    // <add name="EMPLOYEEEntities" connectionString="metadata=res://*/Models.Model1.csdl|res://*/Models.Model1.ssdl|res://*/Models.Model1.msl;provider=System.Data.SqlClient;provider connection string=&quot;Data Source=A-63A9D4D7E7834\THIRD;Initial Catalog=EMPLOYEE;Integrated Security=True;MultipleActiveResultSets=True&quot;" providerName="System.Data.EntityClient" />



    // Set the Metadata location.
    entityBuilder.Metadata = @"res://*/Models.Model1.csdl|
                    res://*/Models.Model1.ssdl|
                    res://*/Models.Model1.msl";
    Console.WriteLine(entityBuilder.ToString());

   // EntityConnection conn =                 new EntityConnection(entityBuilder.ToString());
    /*
    using (EntityConnection conn =
        new EntityConnection(entityBuilder.ToString()))
    {
        conn.Open();
        Response.Write("this is a web application");
        Console.WriteLine("Just testing the connection.");
        conn.Close();
    }*/

    this.ObjectContext.Connection.ConnectionString = entityBuilder.ToString();
   // this.ObjectContext.Connection.Open();
  // this.ObjectContext.Connection.BeginTransaction();

   //  this.ObjectContext.Table1.OrderBy(q => q.ID);

    IQueryable<Table1> results = this.ObjectContext.Table1.OrderBy(q => q.ID);

  //  this.ObjectContext.Connection.Close();

    return results;
}