在Asp.net中,我无法正常捕获任何异常？

Question

在Asp.net(c#)中,我无法正确捕获异常(FileNotFoundException)...我不知道原因.实际上文件不存在..但是catch语句无法捕获异常..这里是代码..

try
{
System.Drawing.Image imgg1 = System.Drawing.Image.FromFile(Server.MapPath("").ToString() + "\\images\\img1.jpg");
}
catch (FileNotFoundException)
{
    Response.Write("<script>alert('Please Select and upload Student's Photo');</script>");
}

Answer 1

你可以找出被抛出的类型

try
{
System.Drawing.Image imgg1 = System.Drawing.Image.FromFile(Server.MapPath("").ToString() + "\\images\\img1.jpg");
 }
 catch (FileNotFoundException)
{
 Response.Write("<script>alert('Please Select and upload Student's Photo');</script>");
  }
catch(Exception ex)
{
   Response.Write("Ex: " + ex.GetType().ToString());
}