Wind shadow ASP. NET basics 3 Web server controls (2)

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• File Size upload restrictions

Review above

We talked about various server-side controls, which brought us a lot of convenience in development. Let's continue to look at other server controls.

 

1. fileupload

 

Anyone who has learned HTML knows that the upload control requires <input type = "file"/>. Of course, we also have corresponding server-side controls.

We only need to determine whether a file is uploaded and save it.

 
1:Protected VoidButton#click (ObjectSender, eventargs E)
 

 
2:{
 

 
3:StringSavepath =@ "D: \ uploads \";
 

 
4: 
 

5:If (! Directory. exists (savepath ))
 

 
6:Directory. createdirectory (savepath );
 

 
7:If (fileupload1.hasfile)
 

 
8:{
 

 
9:String filename = fileupload1.filename;
 

 
10:Savepath + = filename;
 

 
11:Fileupload1.saveas (savepath );
 

 
12:Label1.text = "The uploaded files are:"+ Savepath;
 

 
13: 
 

14:}
 

 
15:Else {
 

 
16:Label1.text = "the file to be uploaded is not specified ";
 

 
17:}
 

 
18:}
 

File Size upload restrictions

You can use web. config to configure the maxrequestlength = "10000" attribute. the upload will fail if the uploaded content exceeds the set value. We can also set the timeout time.

2. hyperlink Control

It is actually the most common a mark in HTML.

Common attributes: navigateurl = "http://www.baidu.com" imageurl = "" text = "" target = "_ blank"

Navigateurl	Jump path
Imageurl	Image carrier
Text	Text carrier (image text 2 select 1)
Target	Open Method _ blank on the New Page

3. panel control

The Panel space is a container control provided by the ASPNET control. Finally, it is converted into a div element.

Common attributes:

Horizontalalign	Alignment of the stator control in the panel
Wrap	Specify whether the content in the panel is automatically switched to the next line when the width is exceeded or truncated.
Scrollbars	Add a scroll bar for content that exceeds the region
Groupingtext	Display the border and title. This attribute will not display the scroll bar.
Visible	Visible or not

 

Summary

We have explained some basic attributes and usage of Web standard server controls.