插入图片 问题 大哥帮忙

jsp1988

<>这是我的代码</P>
5 L6 ?# w4 s7 o( I0 m% I<> if(OpenPictureDialog1-&gt;Execute())</P>
<>   {
: C+ M- }7 J; g; p. n   TMemoryStream *pm=new TMemoryStream();
   Image1-&gticture-&gt;LoadFromFile(OpenPictureDialog1-&gt;FileName);
( O; @2 M. c& e5 s   TJPEGImage *jpg=dynamic_cast&lt;TJPEGImage*&gt;(Image1-&gticture-&gt;Graphic);
# f2 A$ g; ^5 q+ v) k* z   if(jpg!=NULL)
    jpg-&gt;SaveToStream(pm);
    else
    Image1-&gticture-&gt;Bitmap-&gt;SaveToStream(pm);
      ClientDataSet1-&gt;CommandText="insert into student1 (name1,name2,pic) values ('1','1',:picture)";</P>
<>      ((TBlobField*)(ClientDataSet1-&gtarams-&gtaramByName("picture")))-&gt;LoadFromStream(pm);
        delete pm;
& B6 k  @0 [' I. V9 c: U: o1 `8 t0 g        ClientDataSet1-&gt;Execute();
  B9 Q" G5 C1 I     }</P>
2 Z; z6 m: @; a& \<>在运行期间出错误 </P>
( r8 h1 Z, z6 A. P$ {. _<>rject project1.exe raised exception class
EAcessViolation with message ' Acess violation at address 40325fa4 in model
' dbrtl60.bpl '  read of address 94636b84</P>
<>请问大哥们改如何的改正</P>
<>谢谢！！</P>

ilikenba

<>((TBlobField*)(ClientDataSet1-&gtarams-&gtaramByName("picture")))-&gt;LoadFromStream(pm);这句的问题！</P><>TBlobField类是一个字段类！不能将参数转成字段！关于类的说明参见本版的帖子！</P>