ASP. NET string substitution, intercept, and start intercept from the last character in the string

Sometimes you want to replace some characters with other characters in a string, what do I do?

For example:

string [email protected] "csks/news/user_top/qqqq/qqqq.jpg";

Image = Image.  Replace ("/", @ "\"); Replace. Replace ("substituted character", "substituted character")

Response.Write (image); Output on the page

The output is csks\news\user_top\qqqq\qqqq.jpg .....

This allows you to replace part of the character ....

Here's how to intercept a few characters in a character

Similarly, a string of characters is defined first:

string [email protected] "csks/news/user_top/qqqq/qqqq.jpg";

Image = Image.  Substring (0,3); Intercept. Substring (Intercept the 1th character from the first one is 0 and so on, where to intercept)

Response.Write (image); Output on the page

The result of the output is CSK ...

There is one way that I often use to intercept types that I like to use very much:

string image = @ "Csks/news/user_top/qqqq/qqqq.jpg";

Image = Image. Substring (image.  LastIndexOf (".") + 1); Interception of LastIndexOf (e.g. ".") starts with the last "." In the string, and the back of add 1 is not intercepted.)

Response.Write (image);

Output is JPG

If you want to intercept a type that is not, you can also:

string image = @ "Csks/news/user_top/qqqq/qqqq.jpg";

Image = Image. Substring (image.  LastIndexOf ("news/") + 5); Intercept LastIndexOf (from "news/" start interception, because the back +5 so "news/" the five characters are not in the range of interception, the following characters are intercepted)

Response.Write (image);

Output is user_top/qqqq/qqqq.jpg

ASP. NET string substitution, intercept, and start intercept from the last character in the string