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private static SqlConnection connection; //这个和下面的注释有什么区别
/// <summary>
/// 连接对象
/// 默认已经打开
/// </summary>
public static SqlConnection Connection //这个注释和上面的有什么区别
{
get
{
if (connection == null)
{
connection = new SqlConnection(conString);
connection.Open();
}
else if (connection.State == System.Data.ConnectionState.Closed)
{
connection.Open();
}
else if (connection.State == System.Data.ConnectionState.Broken)
{
connection.Open();
}
return connection;
}
}