Question

我正在使用Visual Studio 2008在C＃中编写程序，并在从.sdf文件中检索数据时出错

在SqlCeConnection
中解析查询时出错

我的代码是

SqlCeConnection conn = new SqlCeConnection(connStr);
SqlCeCommand cmd = new SqlCeCommand();
DataSet ds = new DataSet();
SqlCeDataAdapter da;

try
{
    conn.Open();
    cmd = conn.CreateCommand();

    if(mode == "update")
       cmd.CommandText = "SELECT eq_id, description, bl_id, fl_id,  rm_id, modelno, category, eq_std, comments FROM eq where (isModified = 1) SELECT * FROM eq_log";
    else if(mode == "create")
       cmd.CommandText = "SELECT eq_id, description, bl_id, fl_id, rm_id, modelno, category, eq_std, comments FROM eq where (isModified = 2) SELECT * FROM eq_log";

    da = new SqlCeDataAdapter(cmd);
    da.Fill(ds);

    return ds;
}
catch (Exception db)
{
}

错误是：

解析查询时出错。[令牌行号= 2，令牌行偏移= 1，错误令牌= SELECT]

异常详细信息：System.Data.SqlServerCe.SqlCeException：解析查询时出错。解析查询时出错。 [令牌行号= 2，令牌行偏移= 1，令牌错误= SELECT

Answer 1

cmd.CommandText中有2个select语句。您需要通过 ; 分隔它们。

SqlCeConnection conn = new SqlCeConnection(connStr);
SqlCeCommand cmd = new SqlCeCommand();
DataSet ds = new DataSet();
SqlCeDataAdapter da;

try
{
    conn.Open();
    cmd = conn.CreateCommand();

    if(mode == "update")
       cmd.CommandText = "SELECT eq_id, description, bl_id, fl_id,  rm_id, modelno, category, eq_std, comments FROM eq where (isModified = 1); SELECT * FROM eq_log";
    else if(mode == "create")
       cmd.CommandText = "SELECT eq_id, description, bl_id, fl_id, rm_id, modelno, category, eq_std, comments FROM eq where (isModified = 2); SELECT * FROM eq_log";

    da = new SqlCeDataAdapter(cmd);
    da.Fill(ds);

    return ds;
}
catch (Exception db)
{
}

告诉我这是否适合你。

Answer 2

对于SQL Server Compact，每个命令只能有一个SELECT，因此必须返回两个DataSet / DataTables

解析查询时出错。从.sdf文件中检索数据时

2 个答案: