SqlParameter关于Like的传参数无效问题

[b]正确的写法（简洁版）[/b]

private void GetHandleData(string strKeyWord1, string strKeyWord2, string strKeyWord3)
{
　　string strSql = "select top 10 * from VW_Bookinfo where bcode like @strKeyWord1 and contacttel like @strKeyWord2 and spuname like @strKeyWord3 order by tdate desc";

　　SqlParameter[] param = new SqlParameter[]
　　{
　　　　new SqlParameter("@strKeyWord1", SqlDbType.NVarChar,50),
　　　　new SqlParameter("@strKeyWord2",SqlDbType.NVarChar,50),
　　　　new SqlParameter("@strKeyWord3", SqlDbType.NVarChar,50)
　　};
　　param[0].Value = "%" + strKeyWord1 + "%";
　　param[1].Value = "%" + strKeyWord2 + "%";
　　param[2].Value = "%" + strKeyWord3 + "%";

　　DataTable dt = ExecuteDataTableSql(strSql, param);

　　DLView.DataSource = dt;
　　DLView.DataBind();
}