图像转换生成异常

Question

我需要从三个表中记录我为此编写sql查询。但是在前端为文本框和图片框分配值时.excption是生成的。

  

来源：System.Drawing消息：参数无效。方法：   System.Drawing.Image FromStream（System.IO.Stream，Boolean，Boolean）   堆栈跟踪：

     

at System.Drawing.Image.FromStream（Stream stream，Boolean   useEmbeddedColorManagement，Boolean validateImageData）at   System.Drawing.Image.FromStream（Stream stream）。

我的SQL查询是

select s.Name,s.FatherName,CAST(s.Picture as varbinary)as picture,s.Description,SUM(l.Amount) as Loan,SUM(p.Amount) as Paid from Staff s 
left outer join Loan l on s.StaffID=l.StaffID left outer join Payment p on l.StaffID=p.StaffID where s.StaffID=17 group by s.Name,s.FatherName,Description,CAST(Picture as varbinary)