从配置文件生成连接字符串

1 <connectionStrings>
2   <clear/>
3   <add name="partialConnectString" 
4     connectionString="Initial Catalog=Northwind;"
5     providerName="System.Data.SqlClient" />
6 </connectionStrings>

 1 public string void BuildConnectionString(string dataSource,string userName, string userPassword)
 2 {
 3     ConnectionStringSettings settings =
 4         ConfigurationManager.ConnectionStrings["partialConnectString"];
 5 
 6     if (null != settings)
 7     {
 8         string connectString = settings.ConnectionString;
 9 
10         SqlConnectionStringBuilder builder =
11             new SqlConnectionStringBuilder(connectString);
12 
13         builder.DataSource = dataSource;
14         builder.UserID = userName;
15         builder.Password = userPassword;
16         return (builder.ConnectionString);
17     }
18 }