Use regular expressions in C # To filter HTML characters

Source: Internet
Author: User

In C #, regular expressions can be used to filter HTML characters. For example, when verifying user input, HTML characters must be filtered to ensure security.

Using system. Text. regularexpressions;

RegEx. Replace (htmlcode, "<[^>] +> ","");

Explanation: <indicates that it starts with "<"

[^>] [^...] Match any character, but do not match the character followed by ^, that is, if "<>" appears in the string, it will not be filtered because it is part of the HTML Tag.

The plus sign matches at least one search item.

The last is>, indicating that the HTML Tag ends with>.

In C #, regular expressions can be used to filter HTML characters. For example, when verifying user input, HTML characters must be filtered to ensure security.

Using system. Text. regularexpressions;

RegEx. Replace (htmlcode, "<[^>] +> ","");

Explanation: <indicates that it starts with "<"

[^>] [^...] Match any character, but do not match the character followed by ^, that is, if "<>" appears in the string, it will not be filtered because it is part of the HTML Tag.

The plus sign matches at least one search item.

The last is>, indicating that the HTML Tag ends with>.

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