托管C++使用ADO.net的问题

[mickwang]

编译通不过
error C3624: 'System::ComponentModel::Component': the compiler cannot find this type; it is defined in the assembly 'System'是在SqlConnection和SqlCommand那两行，怎么回事？

#using <mscorlib.dll>
#using <system.data.dll>
#using <system.Xml.dll>
using namespace System;
using namespace System::Data;
using namespace System::Data::SqlClient;
using namespace System::Xml;
void main()
{

SqlConnection *mySqlConn;
mySqlConn=new SqlConnection(S"server=myserver;Trusted_Connection=yes;database=pubs;");
mySqlConn->Open();

SqlCommand *mySqlCmd=new SqlCommand(S"select*from authors",mySqlConn);

SqlDataReader* myReader=mySqlCmd->ExecuteReader();
while(myReader->Read())
Console::WriteLine(myReader->get_Item("au_lname")->ToString());
myReader->Close();
mySqlConn->Close();
}

[zjblue]

#using <system.data.dll>
#using <system.Xml.dll>

你试下
#using system.data
#using system.xml

不过好奇怪,你的程序不是托管C＋＋把

[SchoolHK]

楼上说的对
看来看去也不见得是managed C++.....

[Linbo Zhao]

前面还要写:
#using <system.dll>

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[duebbin]

#using <mscorlib.dll>
#using <system.data.dll>
#using <system.Xml.dll>
using namespace System;
using namespace System::Data;
using namespace System::Data::SqlClient;
using namespace System::Xml;
void main()
{

System::Data::SqlClient::SqlConnection __gc* mySqlConn;
mySqlConn=new System::Data::SqlClient::SqlConnection(S"server=myserver;Trusted_Connection=yes;database=pubs;");
mySqlConn->Open();

System::Data::SqlClient::SqlCommand __gc* mySqlCmd = new System::Data::SqlClient::SqlCommand(S"select*from authors",mySqlConn);

System::Data::SqlClient::SqlDataReader __gc* myReader =m ySqlCmd->ExecuteReader();
while(myReader->Read())
Console::WriteLine(myReader->get_Item("au_lname")->ToString());
myReader->Close();
mySqlConn->Close();
}