September 2003
Intermediate to advanced
1008 pages
26h 5m
English
Content preview from Programming ASP.NET, Second Edition
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Images
There are two ASP controls for displaying images: the Image control and the AdRotator control.
Image Control
The Image control has very limited functionality—it is used for displaying an image on a web page or, alternatively, displaying some text if the image is not available. If you need to have button functionality (that is, to capture mouse clicks), then you should use the ImageButton control, described earlier in this chapter.
In addition to the properties inherited from WebControl, the Image control has the properties shown in Table 5-16.
Table 5-16. Properties of the Image control
|
Name |
Type |
Get |
Set |
Values |
Description |
|---|---|---|---|---|---|
|
AlternateText |
String |
x |
x |
The text displayed in the control if the image is unavailable. In browsers that support the ToolTips feature, this text is also displayed as a ToolTip. | |
|
ImageAlign |
ImageAlign |
x |
x |
See Table 5-17. |
Alignment options relative to the text of the web page. See Table 5-17. |
|
ImageUrl |
String |
x |
x |
The URL pointing to the location of an image to display. |
The ImageUrl property can be either relative or absolute. A relative URL is the location relative to the location of the web page, without specifying a fully qualified path on the server. Using relative URLs makes it easier to move an entire site without modifying any of the code, as long as the image is in a subdirectory relative to the virtual root and the same directory structure is maintained. An absoluteURL provides a fully qualified path. If the site is moved, ...
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.