請問我要如何使用TIDHTTP來實現續傳,以下為China Join 大發表的範例片斷: void __fastcall TMyThread::trycatch(){ if(count==0) Form1->IdHTTP1->Request->ContentRangeStart=0; else{ Form1->IdHTTP1->Request->ContentRangeStart=count; ms->Position=count; } try{ Form1->IdHTTP1->Get("http://XXX.XXX.XXX.XXX/a.txt",ms); } catch(...){ if(MessageBox(NULL,"下載資料中斷，要續傳嗎？","斷線",MB_YESNO)==IDYES) trycatch(); } } //------------------------------------------------------------- void __fastcall TForm1::Button2Click(TObject *Sender) { IdHTTP1->Disconnect(); } //------------------------------------------------------------- 但其中有2點疑問 1. 在Get裡,似乎每一次下載都從檔案的頭開始. 2. debug時使用Button2或拔掉網路線時會出現錯誤訊息: Project Connect.exe raised exeption class EIdNotConnected with message'Not Connected'.Process stopped.Use Step or Run to continue.

引用原程式碼: void __fastcall TForm1::IdHTTP1Work(TObject *Sender, TWorkMode AWorkMode, const int AWorkCount) { count=AWorkCount;//<--它會一直從0開始算,但是我中斷後的Count值卻不一定為0 ProgressBar1->Position=AWorkCount; StatusBar1->Panels->Items[0]->Text="資料擷取中..."; // StatusBar1->Panels->Items[1]->Text=IntToStr(AWorkCount) " Byte" " 完成度：" IntToStr(((int)(((float)AWorkCount/ProgressBar1->Max)*100))) " %"; //Panel1->Refresh(); } 做了一些實驗後,發現其中AWorkCount總是會從0開始計算,所以會影響到count的值,但又不能累加.. 請問哪位大大能告訴我如何取得目前下載檔案的點的值??