日期:2014-05-19  浏览次数:20504 次

ExecuteReader问题!无法执行请高手进来看看!顶者有分!!
ExecuteReader执行问题!
执行时候报错!错误如下:
ExecuteReader   需要打开的并且可用的连接。该连接的当前状态是   Closed。
行   130: SqlDataReader   di   =   cmi.ExecuteReader();
我已经打开数据库了为什么还出现这样的情况呢?
我的源代码如下:
public   class   ParaStructure
{
public   int   P_AutoID;
public   string   P_GroupCountry;
public   string   P_GroupName;
public   string   P_AutoBrand;
public   string   P_AutoSeries;
public   string   P_AutoType;
public   string   P_AutoRealType;
public   string   P_AutoClass;
public   string   P_AutoMakeClass;
public   string   P_AutoYear;
public   string   P_AutoCheShu;
}

public   static   void   Para(int   Autoid)
{
SqlConnection   con=DataCon.AutoCon();
SqlCommand   cmd=new   SqlCommand( "AutoInfoGetList ",con);
cmd.CommandType=CommandType.StoredProcedure;

SqlParameter   DID=new   SqlParameter( "@Aid ",SqlDbType.Int,4);
DID.Value=Autoid;
cmd.Parameters.Add(DID);

con.Open();
SqlDataReader   dr=cmd.ExecuteReader();
ParaStructure   PV=new   ParaStructure();
if(dr.Read())  
{
PV.P_AutoBrand=dr[ "AutoBrand "].ToString();
PV.P_AutoClass=dr[ "AutoClass "].ToString();
PV.P_AutoID=Convert.ToInt32(dr[ "AutoID "]);
PV.P_AutoMakeClass=dr[ "AutoMakeClass "].ToString();
PV.P_AutoRealType=dr[ "AutoRealType "].ToString();
PV.P_AutoSeries=dr[ "AutoSeries "].ToString();
PV.P_AutoType=dr[ "AutoType "].ToString();
PV.P_GroupCountry=dr[ "GroupCountry "].ToString();
PV.P_GroupName=dr[ "GroupName "].ToString();
}
dr.Close();
con.Close();
}

SqlConnection   coe   =   DataCon.AutoCon();
coe.Open();

SqlCommand   cmi   =   new   SqlCommand( "cheParameter_cheGetList ",con);
cmi.CommandType   =   CommandType.StoredProcedure;

SqlParameter   DIDD   =   new   SqlParameter( "@Aid ",SqlDbType.Int,4);
DIDD.Value   =   Autoid;
cmi.Parameters.Add(DIDD);

SqlDataReader   di   =   cmi.ExecuteReader();
ParaStructure   PVV   =   new   ParaStructure();
if(di.Read())
{
PVV.P_AutoID   =   Convert.ToInt32(dr[ "AutoID "]);
PVV.P_AutoYear   =   di[ "AutoYear "].ToString();
PVV.P_AutoCheShu   =   di[ "AutoCheShu "].ToString();
}
di.Close();
coe.Close();

到底是那里错误了呢??

------解决方案--------------------
SqlCommand cmi = new SqlCommand( "cheParameter_cheGetList ",con);

这 里,你传入的还是con,应该是coe