为什么总说我parameter not found

[capfdipoe]

void __fastcall TfrmManage::SpeedButton3Click(TObject *Sender)
{
Panel1->Visible=true;
SpeedButton2->Visible=true;
SpeedButton3->Visible=false;
}
//---------------------------------------------------------------------------

void __fastcall TfrmManage::TreeView1Change(TObject *Sender,
TTreeNode *Node)
{
dmManage->qrySendInformation->Close();
dmManage->qrySendInformation->SQL->Clear();
if(Node->Text=="收件箱"){
dmManage->qrySendInformation->SQL->Add("select S_no ,Message ,Datatime ");
dmManage->qrySendInformation->SQL->Add("from sendinformation where sendinformation.R_no=:user_no");
pmuInsert->Enabled=false;
pmuDelete->Enabled=false;
pmuThrow->Enabled=false;
}
else if(Node->Text=="发件箱"){
dmManage->qrySendInformation->SQL->Add("select R_no,Message,Datatime ");
dmManage->qrySendInformation->SQL->Add("from sendinformation where sendinformation.S_no=:user_no ");
pmuInsert->Enabled=true;
pmuDelete->Enabled=true;
pmuThrow->Enabled=true;
}
else if(Node->Text=="垃圾箱"){
dmManage->qrySendInformation->SQL->Add("select * from sendinformation where charindex(';'+:user_no+':',sendinformation.reader_list)!=0");
pmuInsert->Enabled=false;
pmuDelete->Enabled=true;
pmuThrow->Enabled=false;
}
dmManage->qrySendInformation->ParamByName("user_no")->AsString=frmManage->user_no;
dmManage->qrySendInformation->Prepare();
dmManage->qrySendInformation->Open();
}
//---------------------------------------------------------------------------

void __fastcall TfrmManage::DBGrid1CellClick(TColumn *Column)
{
if(Column->Title->Caption=="信件"){
frmREInformation->ShowModal();
}
}
//---------------------------------------------------------------------------

void __fastcall TfrmManage::pmuInsertClick(TObject *Sender)
{
if(TreeView1->Selected->Text=="发件箱"){
frmREInformation->ShowModal();
}


}



为什么我这段运行时，点击treeview上的node（无论是“收件箱”，“发件箱”），都显示parameter"user_no"not found

[capfdipoe]

to wonderxin:
总算通过了！！！
谢谢！！！

[wonderxin]

给分吧，赫赫-----不容易呀~~~

[capfdipoe]

为什么我以前直接用parambyname就没有问题呢？
回答了才能得分，
呵呵！分可不是那么容易拿的

[wonderxin]

pmuDelete->Enabled=true;
pmuThrow->Enabled=false;
}
dmManage->qrySendInformation->Param.ParamCreate(ftString,"user_no",ptInput);
dmManage->qrySendInformation->ParamByName("user_no")->AsString=frmManage->user_no;
dmManage->qrySendInformation->Prepare();
dmManage->qrySendInformation->Open();
}
//---------------------------------------------------------------------------

[wonderxin]

dmManage->qrySendInformation->Param->ParamCreate(ftString,"user_no",ptInput);

[capfdipoe]

to wonderxin:
运行时，
param is not a member of TQuery

[wonderxin]

sorry,应该是Params

[capfdipoe]

to wonderxin:
[C++ Error] manage.cpp(63): E2316 'ParamCreate' is not a member of 'TParams'

[wonderxin]

真不要意思，是CreateParam

[wonderxin]

但愿不要再出问题了-----我的天~

[capfdipoe]

to wonderxin
完蛋了你
自从加上了你的语句后，总出现couldn't find object
今天我斗胆将你的语句去掉，结果竟然好了，
知道这是怎么回事吗？