在SQLITE命令中多次传递相同的参数

在SQLITE命令中多次传递相同的参数,sqlite,system.data.sqlite,sqlparameter,Sqlite,System.data.sqlite,Sqlparameter,我喜欢运行以下查询: select lon, lat from rdf_city_poi p, rdf_location l where p.location_id = l.location_id and p.poi_id = ? union all select lon, lat from rdf_poi_address p, rdf_location l where p.location_id = l.location_id a

我喜欢运行以下查询:

select 
     lon, lat 
  from  rdf_city_poi p, rdf_location l 
     where p.location_id = l.location_id and p.poi_id = ? 
union all select 
     lon, lat 
 from  rdf_poi_address p, rdf_location l 
     where p.location_id = l.location_id and p.poi_id = ? 
union all select 
    lon, lat 
 from xtdp_poi_address pa, xtdp_location l 
     where pa.location_id=l.location_id and pa.poi_id= ?
正如您所看到的,它是相同参数和值的3倍

参数(“?”)::值(例如12345)

我已经写了下面的代码,它只接受了一次参数

            int Carto_id = Convert.ToInt32(dtsqlquery2.Rows[k][0]);
            string selectpoly = xNodelatlongquery2.Replace("\r\n", string.Empty);
            //SQLiteCommand selectpolygon = new SQLiteCommand(selectpoly + Carto_id, con);

            int countparameters = selectpoly.Split('?').Length - 1;

            SQLiteCommand selectpolygon = new SQLiteCommand(selectpoly, con);

            //var paramaters = new string[countparameters];

            //SQLiteParameter[] parameters = new SQLiteParameter[countparameters];
            for (int i = 0; i < countparameters; i++)
            {
                //SQLiteParameter[] parame = new SQLiteParameter[]{
                //new SQLiteParameter("?", Carto_id)};

                //paramaters[i] = string.Format("?", Carto_id);
                //selectpolygon.Parameters.AddWithValue(paramaters[i], Carto_id);

                selectpolygon.Parameters.AddWithValue("?", Carto_id);
            }


            //selectpolygon.Parameters.AddRange(paramaters);

            SQLiteDataReader dataReaderpoly = selectpolygon.ExecuteReader();
            DataSet ds1 = new DataSet();
int Carto_id=Convert.ToInt32(dtsqlquery2.Rows[k][0]);
string selectpoly=xNodelatlongquery2.Replace(“\r\n”,string.Empty);
//SQLITECOMAND selectpolygon=新SQLITECOMAND(selectpoly+Carto\U id,con);
int countparameters=selectpoly.Split(“?”).Length-1;
SQLITECOMAND selectpolygon=新SQLITECOMAND(selectpoly,con);
//var paramaters=新字符串[countparameters];
//SQLiteParameter[]参数=新SQLiteParameter[countparameters];
对于(int i=0;i
你可以看到,我尝试了一些逻辑,但它们不能满足我的要求。 如何将参数数组添加到逻辑的命令中?

在SQLite中,您可以明确给出一个数字:

... WHERE x = ?1 OR y = ?1 AND z <> ?1 ...
。。。其中x=?1或y=?1和z?1。。。
或者给它起个名字:

... WHERE x = :PoiID OR y = :PoiID AND z <> :PoiID ...
。。。其中x=:poid或y=:poid和z:poid。。。