各位高手请看下面程序：
Dim ds As New DataSet
Dim Ada As SqlCeDataAdapter
Dim connString As String = "Data Source =\存储卡\rggl\data\biaozhun.sdf;"
Dim cb As New SqlCeCommandBuilder
conn.ConnectionString = connString
conn.Open()
Dim query As String = "SELECT * from biaozhun where ar=2"
Ada = New SqlCeDataAdapter(query, conn)
cb.DataAdapter = Ada
Ada.Fill(ds, "biaozhun")
DataGrid1.DataSource = ds.Tables("biaozhun")
错误在 Ada.Fill(ds, "biaozhun") 提示为数据转换失败。 [ OLE DB status value (if known) = 2 ]
当查询结果为1个时datagrid可显示，但是查询结果为两个时就是上面的错误！
我想实现的功能是查询sdf文件并在datagrid中显示！
请各位高手指教！！！！
SqlCeDataAdapter好像只能返回单列的！求可返回多列的操作
------解决方案--------------------
怎么没有大虾回答！！！
------解决方案--------------------
debug code
------解决方案--------------------
这应该是VB语法吧，不懂
只能路过
------解决方案--------------------
是vb.net，请高人指点，不胜感谢！！！！！
------解决方案--------------------
public DataSet GetList(string ipara1, string ipara1, string ipara2,
string ipara3)
{
string sql;
DataSet ds = new DataSet();
sql = "SELECT * FROM yourdatabaseTable WHERE 0=0";
if (ipara1.Length > 0)
sql += " AND para1=" + ipara1;
if (ipara2.Length > 0)
sql += " AND para2 LIKE '%" + ipara2+ "%'";
if (ipara3.Length > 0)