.Net紧凑框架SqlClient异常

Question

我为WindowsCE5.0设备开发，并试图连接到远程Server。但是，如果使用带有参数的命令，则会得到异常：

{System.Data.SqlClient.SqlException: SqlException
at System.Data.SqlClient.SqlConnection.OnError(SqlException exception, TdsParserState state)
at System.Data.SqlClient.SqlInternalConnection.OnError(SqlException exception, TdsParserState state)
at System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning()
at System.Data.SqlClient.TdsParser.Run(RunBehavior run, SqlCommand cmdHandler, SqlDataReader dataStream)
at System.Data.SqlClient.SqlDataReader.ConsumeMetaData()
at System.Data.SqlClient.SqlDataReader.get_MetaData()
at System.Data.SqlClient.SqlCommand.ExecuteReader(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream)
at System.Data.SqlClient.SqlCommand.System.Data.IDbCommand.ExecuteReader(CommandBehavior behavior)
at System.Data.Common.DbDataAdapter.FillInternal(DataSet dataset, DataTable[] datatables, Int32 startRecord, Int32 maxRecords, String srcTable, IDbCommand command, CommandBehavior behavior)
at System.Data.Common.DbDataAdapter.Fill(DataSet dataSet, Int32 startRecord, Int32 maxRecords, String srcTable, IDbCommand command, CommandBehavior behavior)
at System.Data.Common.DbDataAdapter.Fill(DataSet dataSet)
at Test.MainForm.TestConnection()
...
}

代码：

SqlConnection conn = new SqlConnection(connectionString);  
conn.Open();  
SqlCommand cmd = conn.CreateCommand();  
cmd.CommandText = "select * from table_name where id = @id";
cmd.CommandType = CommandType.Text;
cmd.Parameters.Add(new SqlParameter("id", 1));
SqlDataAdapter da = new SqlDataAdapter(cmd);
DataSet ds = new DataSet();
da.Fill(ds);
DataTable dt = ds.Tables[0];

而且不需要添加参数来命令，它就可以正常工作。请告诉我原因是什么？(我使用的是VS2008，.net紧凑框架3.5)

Answer 1

将“@”放在参数名称之前，如

cmd.Parameters.Add(new SqlCeParameter("@id", 1));