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如果manage_score返回true,则调用Update函数。 在Update中的这一行(System.Data.SqlClient.SqlDataReader oReader3 = cmd2.ExecuteReader()。我得到这个错误(已经有一个打开的DataReader与这个Command关联,它必须先关闭)。我已经删除了一些行使代码少长阅读 Manage_score:插入一个新的条目如果尚未有 更新:。正所谓条目是否已经存在,以及它在更新前做一些计算asp.net DataReader永不关闭
谢谢
public static bool manage_score(String City, String Street, String No, int Clean, int Fun, int Study, bool recommend)
{
System.Data.SqlClient.SqlConnection conn=null;
System.Data.SqlClient.SqlCommand cmd = null; ;
System.Data.SqlClient.SqlDataReader rdr=null;
bool needUpdate=false;
try
{
using(conn = new System.Data.SqlClient.SqlConnection(dbConn))
{
using(cmd = new System.Data.SqlClient.SqlCommand(
"Insert Into c_Show (Street,City,No,Count,Clean,Fun,Study,CleanScore,FunScore,StudyScore,Like_,Dislike) " +
"VALUES (@Street,@City,@No,'1',@Clean,@Fun,@Study,@Clean,@Fun,@Study,@Like,@DisLike)", conn))
{
cmd.Parameters.Add("@No", System.Data.SqlDbType.Int).Value = No;
cmd.Parameters.Add("@City", System.Data.SqlDbType.Char).Value = City;
cmd.Connection.Open();
using (rdr = cmd.ExecuteReader(System.Data.CommandBehavior.CloseConnection)) { }
}
}
}
catch (System.Data.SqlClient.SqlException ex)
{
if (ex.Number == 2627)// duplicate key
{
needUpdate=true;
}
}
catch (System.Exception ex) { }
return needUpdate;
}
static public void update(String City, String Street, String No, int Clean, int Fun, int Study, bool recommend)
{
using (System.Data.SqlClient.SqlConnection conn2 = new System.Data.SqlClient.SqlConnection(dbConn))
{
String resCount = null;
String resClean = null;
String resFun = null;
String resStudy = null;
String resLike = null;
String resDislike = null;
using (System.Data.SqlClient.SqlCommand cmd2 = new System.Data.SqlClient.SqlCommand(
"SELECT Street,City,No,Count,CleanScore,FunScore,StudyScore,Like_,Dislike FROM c_Show " +
"Where [email protected] and [email protected] and [email protected] ", conn2))
{
cmd2.Parameters.Add("@No", System.Data.SqlDbType.Int).Value = No;
cmd2.Parameters.Add("@City", System.Data.SqlDbType.Char).Value = City;
cmd2.Parameters.Add("@Street", System.Data.SqlDbType.NVarChar).Value = Street;
cmd2.Connection.Open();
cmd2.ExecuteReader();
using (System.Data.SqlClient.SqlDataReader oReader3 = cmd2.ExecuteReader())
{}
}
}
}
谢谢,arfff我刚才在1分钟前看到了这个错误。在我的小房间里长时间的热点节目。 –
是的,热量可以让我们看到事物,或*不*看到的东西:)不要忘记标记答案为接受,以便问题被标记为已解决。 – sstan