Some common questions about ASP (III.)

1. The entire page has no submit button, there is no related script, only <input type= "image" ""??
The first question is the basic knowledge of HTML, the default action of the image element is submit.
2. The file size can be displayed on the page after adding the attachment, but the page is not refreshed.
If the ASP, to use RS bar, even if other Dongdong client also have corresponding script it.
But view source did not have a sentence <script>!! Confused!
A: The second question you describe is not correct, it is actually submitted to the server after processing before you know
How large the file is, as to what you said did not refresh, may be due to the small file you uploaded,
Fast, and the original page is not a few words, so show very quickly, refresh the most obvious
The logo is the contents of the Upload text box is gone ...
3. How does multiple submit of a form discriminate on the server side? No use hidden.
A: That's why I use image instead of submit ...
If you are using submit, because a form can only have one submit, and
If you need to complete multiple submissions, it's not enough ...
But use image is OK, because click each image is quite with submit.
And as long as the service side to determine whether Request.Form ("image name.x") is empty can
Know is the click of which submit ...
A lazy way oh ...
4. Please tell me how to insert the picture.
A: Rnd did not initialize it (Randomize ())