我在一个解决方案中有这个代码，它工作正常：
private readonly List<Department> departments = new List<Department>();
. . .
private void LoadDepartments(string serialNum)
{
string dbContext = HandheldServerUtils.GetDBContextForSerialNum(serialNum);
string connStr =
string.Format(
@"Provider=Microsoft.ACE.OLEDB.12.0;User ID=NRBQSP;Password=NRBQSP;Data Source=C:\CCRWin\DATA\CCRDAT{0}.MDB;Jet OLEDB:System database=C:\CCRWin\Data\sscs.mdw",
dbContext);
using (var conn = new OleDbConnection(connStr))
{
using (OleDbCommand cmd = conn.CreateCommand())
{
cmd.CommandText =
@"SELECT t_accounts.account_no as AccountID, IIF(ISNULL(t_accounts.name),'[blank]',t_accounts.name) AS Name
FROM t_accounts
INNER JOIN td_department_accounts ON (t_accounts.account_no =
td_department_accounts.account_no) where type = 'DE'";
cmd.CommandType = CommandType.Text;
conn.Open();
int i = 1;
using (OleDbDataReader oleDbD8aReader = cmd.ExecuteReader())
{
while (oleDbD8aReader != null && oleDbD8aReader.Read())
{
string accountNum = oleDbD8aReader.GetString(0);
string deptName = oleDbD8aReader.GetString(1);
Add(new Department {Id = i, AccountId = accountNum, Name = deptName});
i++;
}
}
}
}
}
我在另一个中有这个非常相似的代码：
public IEnumerable<Department> GetDepartments()
{
private readonly List<Department> departments = new List<Department>();
string dbContext = "42";
string connStr =
string.Format(
@"Provider=Microsoft.ACE.OLEDB.12.0;User ID=NRBQSP;Password=NRBQSP;Data Source=C:\CCRWin\DATA\CCRDAT{0}.MDB;Jet OLEDB:System database=C:\CCRWin\Data\sscs.mdw",
dbContext);
using (var conn = new OleDbConnection(connStr))
{
using (OleDbCommand cmd = conn.CreateCommand())
{
cmd.CommandText =
@"SELECT t_accounts.account_no as AccountID, IIF(ISNULL(t_accounts.name),'[blank]',t_accounts.name) AS Name
FROM t_accounts
INNER JOIN td_department_accounts ON (t_accounts.account_no = td_department_accounts.account_no) where type = 'DE'";
cmd.CommandType = CommandType.Text;
conn.Open();
int i = 1;
using (OleDbDataReader oleDbD8aReader = cmd.ExecuteReader())
{
while (oleDbD8aReader != null && oleDbD8aReader.Read())
{
string accountNum = oleDbD8aReader.GetString(0);
string deptName = oleDbD8aReader.GetString(1);
departments.Add(new Department { Id = i, AccountId = oleDbD8aReader.GetInt16(0), Name = oleDbD8aReader.GetString(1) });
i++;
}
}
}
}
return departments;
}
...它会咳出 26 个错误，例如：
“; 预期的”
在这条线上和其他线上：
using (var conn = new OleDbConnection(connStr))
- 和"} 预期"在开头 "{" 之后
--and “命名空间不能直接包含字段或方法等成员”
在这条线上：
departments.Add(new Department { Id = i, AccountId = oleDbD8aReader.GetInt16(0), Name = oleDbD8aReader.GetString(1) });
- 和此行上的“类、结构或接口成员声明中的无效标记 '!=' ”：
while (oleDbD8aReader != null && oleDbD8aReader.Read())
...以及“（”和“，”和“;”和“{”和“=”和“使用”的许多其他“无效令牌”错误
- 和两个“类型或命名空间定义，或预期的文件结尾”
如果我注释掉除 return 语句之外的所有代码，那么它就是：
public IEnumerable<Department> GetDepartments()
{
return null;
}
...它编译得很好。
为什么这里对鹅有好处的东西对鹅没有好处？