ADO.NET Entity Framework 数据库连接字符串手工设置

一般情况，可以直接使用系统自动配置的连接字符串。如果要发布或者多个数据源，则

需要手工设置数据库连接。 示例如下：

// Specify the provider name, server and database.

string providerName = "System.Data.SqlClient";

string serverName = "DBServer";

string databaseName = "databaseName";

// 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 = false;

sqlBuilder.UserID = "sa";

sqlBuilder.Password = "sa";

// 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;

entityBuilder.Provider = providerName;

// Set the Metadata location.

entityBuilder.Metadata = "res://*" ; //或从.config文件中copy

//@"res://*/NBModel.csdl|

//res://*/NBModel.ssdl|

//res://*/NBModel.msl";

string str = entityBuilder.ToString();

using (NORTHWNDEntities nwt = new NORTHWNDEntities(entityBuilder.ToString()))

{

var query = from cat in nwt.Categories

select cat;

this.GridView1.DataSource = query;

this.GridView1.DataBind();

}