插入图片 问题 大哥帮忙

jsp1988

<>这是我的代码</P>
/ h- v& s: \/ @9 p. ]: s<> if(OpenPictureDialog1-&gt;Execute())</P>
<>   {
8 ~; J, ^8 v# r& f/ N, r# V7 w   TMemoryStream *pm=new TMemoryStream();
   Image1-&gticture-&gt;LoadFromFile(OpenPictureDialog1-&gt;FileName);
   TJPEGImage *jpg=dynamic_cast&lt;TJPEGImage*&gt;(Image1-&gticture-&gt;Graphic);
1 E; N2 e% `% y7 g+ q   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>
3 Z; p& N  O0 V# o1 l3 i0 I- e1 a<>      ((TBlobField*)(ClientDataSet1-&gtarams-&gtaramByName("picture")))-&gt;LoadFromStream(pm);
% s1 u& F2 Q) ?' q$ G2 R/ n4 M        delete pm;
        ClientDataSet1-&gt;Execute();
     }</P>
- I* w) W9 s' |: q6 F# T9 p0 d8 g2 d<>在运行期间出错误 </P>
<>rject project1.exe raised exception class
EAcessViolation with message ' Acess violation at address 40325fa4 in model
. t. [1 U2 ^" [9 d7 c' dbrtl60.bpl '  read of address 94636b84</P>
' D) @5 ]0 b, I9 |<>请问大哥们改如何的改正</P>
0 P: L5 h; M+ d<>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>