怎么把unsigned char[]插入数据库
本帖最后由 l848347 于 2012-12-13 15:24:53 编辑 数据库：access

struct Q
 {
 unsigned sn[8];
 }PP;

cc(PP *p){
//使用托管
 OleDbConnection ^myConnection = gcnew OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0;Data Source=c:\\data\\test.mdb");
 
 try
 {
 myConnection->Open();
 if (myConnection->State == ConnectionState::Open)
 {
 Console::WriteLine("Connection opened successfully");
 OleDbCommand ^oleCmd = gcnew OleDbCommand
 ("insert into pub(iResult,aucSn) values(1,'asd')", myConnection);
 oleCmd->ExecuteNonQuery();
 }
 else
 Console::WriteLine("Connection could not be established");
 }
 catch(Exception ^ex)
 {
 Console::Write(ex->Message);
 }
 __finally
 {
 myConnection->Close();
 }
}

int main()
{
   PP s = {"1@-ad8"};
PP *pt = &s;
cc(pt);
   return 0;
}

但是

OleDbCommand ^oleCmd = gcnew OleDbCommand
  ("insert into pub(iResult,aucSn) values(1,'asd')", myConnection);

改成

("insert into pub(iResult,aucSn) values(1,'"+p->sn+"')", myConnection);

就不可以了。


报错信息：错误1error C2679: 二进制“+”: 没有找到接受“unsigned char *”类型的右操作数的运算符(或没有可接受的转换)

[解决办法]
前面两句只是为了演示方便，随便写的
关键是第三句。

String^ a2 = Marshal::PtrToStringAnsi((IntPtr) (char *) a);