插入图片 问题 大哥帮忙

jsp1988

<>这是我的代码</P>
<> if(OpenPictureDialog1-&gt;Execute())</P>
+ ?; A( y8 Y5 k' L<>   {
* K+ U, M9 i0 s: ^   TMemoryStream *pm=new TMemoryStream();
" X) V" y. E7 F$ H$ I   Image1-&gticture-&gt;LoadFromFile(OpenPictureDialog1-&gt;FileName);
   TJPEGImage *jpg=dynamic_cast&lt;TJPEGImage*&gt;(Image1-&gticture-&gt;Graphic);
   if(jpg!=NULL)
" ^! P2 @7 p+ J. E0 x    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>
$ C/ o1 j* X6 Q0 {' S2 u<>      ((TBlobField*)(ClientDataSet1-&gtarams-&gtaramByName("picture")))-&gt;LoadFromStream(pm);
        delete pm;
# M/ C% f$ k+ a        ClientDataSet1-&gt;Execute();
     }</P>
<>在运行期间出错误 </P>
& F" S  c. i0 s0 I: P' e9 E<>rject project1.exe raised exception class
EAcessViolation with message ' Acess violation at address 40325fa4 in model
* `( m  e, y& E' dbrtl60.bpl '  read of address 94636b84</P>
) j) f2 K2 U, v3 i0 a5 P4 V<>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>