插入图片 问题 大哥帮忙

jsp1988

<>这是我的代码</P>
: a! C" S" Q  d/ O5 X<> if(OpenPictureDialog1-&gt;Execute())</P>
<>   {
   TMemoryStream *pm=new TMemoryStream();
* M% W# A5 @, `4 d  X3 b   Image1-&gticture-&gt;LoadFromFile(OpenPictureDialog1-&gt;FileName);
   TJPEGImage *jpg=dynamic_cast&lt;TJPEGImage*&gt;(Image1-&gticture-&gt;Graphic);
# {" p2 `" F' P   if(jpg!=NULL)
1 }9 s, f/ ~& Y- K    jpg-&gt;SaveToStream(pm);
    else
9 X6 z8 o9 J* U* A    Image1-&gticture-&gt;Bitmap-&gt;SaveToStream(pm);
      ClientDataSet1-&gt;CommandText="insert into student1 (name1,name2,pic) values ('1','1',:picture)";</P>
. K- @' m7 Y1 x4 T, |1 `2 d2 s<>      ((TBlobField*)(ClientDataSet1-&gtarams-&gtaramByName("picture")))-&gt;LoadFromStream(pm);
# g2 e  O4 Q- T0 @5 V7 ~        delete pm;
        ClientDataSet1-&gt;Execute();
$ e- K. C0 g' v0 K     }</P>
2 U7 J# D6 F: T3 \& G" e<>在运行期间出错误 </P>
. P" ~" T+ w6 G<>rject project1.exe raised exception class
1 c  L1 [5 W- A( k7 [% oEAcessViolation 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>