Question

delphi 三层架构如果下载数据库中的二进制流文件？

Answer 1

给你个例子：
aStream:=TMemoryStream.Create;
try
frameSheet1.cxSpreadBook.AutoRecalc:=false;
frameSheet1.cxSpreadBook.BeginUpdate;
cdsTemplateBodyCONTENT.SaveToStream(aStream); //-------------------------
aStream.Position := 0; //--------------------------
frameSheet1.cxSpreadBook.LoadFromStream(aStream);
frameSheet1.cxSpreadBook.EndUpdate;
finally
aStream.Free;
end;

3层结构服务器为COM+时，一直没有保存成功过，但读取没问题