Here is the simple and quick way to replace a text in a HTML or TEXT file.
![replace.gif]()
Regex is a class that represents the .NET framework regular expression engine.
It plays a vital role in quickly parsing a large amount of text to find specific
patterns; to extract, edit, replace or delete text substrings;
How to use the Regular Expression Syntax?
To implement the regular expression, you should follow a certain pattern that
you want to identify in your text stream. At the next step you can instantiate
the Regex class and do your operations such as replacing text, editing text,
removing white spaces, & etc.
Following table has the pattern and the description for it. Hope this could help
you to implement your own logic.
| Pattern |
Description |
| ^ |
Start at the beginning of the string. |
| \s* |
Match zero or more white-space
characters. |
| [\+-]? |
Match zero or one occurrence of either
the positive sign or the negative sign. |
| \s? |
Match zero or one white-space
character. |
| \$? |
Match zero or one occurrence of the
dollar sign. |
| \s? |
Match zero or one white-space
character. |
| \d* |
Match zero or more decimal digits. |
| \.? |
Match zero or one decimal point
symbol. |
| \d{2}? |
Match two decimal digits zero or one
time. |
| (\d*\.?\d{2}?){1} |
Match the pattern of integral and
fractional digits separated by a decimal point symbol at least one time. |
| $ |
Match the end of the string. |