if ( int id = null)
{
string sql = "select top 5 * from context";
}
else
{
string sql = "select top 5 * from context where listid=" + id + "";
}
我的意思是如果id是空值,但不知怎么设置.只会这样写:int id = null 请问怎么写?
{
string sql = "select top 5 * from context";
}
else
{
string sql = "select top 5 * from context where listid=" + id + "";
}
我的意思是如果id是空值,但不知怎么设置.只会这样写:int id = null 请问怎么写?
{
if ( int id = null)
{
string sql = "select top 5 * from context";
}
else
{
string sql = "select top 5 * from context where listid=" + id + "";
}
string tbody = "";
OleDbDataReader my_reader;
OleDbCommand my_comm = new OleDbCommand();
my_comm.CommandText= sql;
my_comm.CommandType = CommandType.Text;
my_comm.Connection = my_conn;
my_conn.Open();
my_reader = my_comm.ExecuteReader();
}
{
string sql = "select top 5 * from context";
}
else
{
string sql = "select top 5 * from context where listid=" + id + "";
}