26 common functions for Asp. Nne Programming

1. DateTime numeric type
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System. DateTime currentTime = new System. DateTime ();
1.1 take the current year, month, day, hour, minute, second currentTime = System. DateTime. Now;
1.2 take the current Year int Year = currentTime. Year;
1.3 The current Month int Month = currentTime. Month;
1.4 Use the int Day of the current Day = currentTime. Day;
1.5 when the current int value is used: = currentTime. Hour;
1.6 take the current Minute int = currentTime. Minute;
1.7 take the current Second int Second = currentTime. Second;
1.8 take the current Millisecond int Millisecond = currentTime. Millisecond;
(The variable can be in Chinese)

2. Int32.Parse (variable) Int32.Parse ("constant ")
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Convert string to 32-digit font

3. Variable. ToString ()
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Convert string to string
12345. ToString ("n"); // generate 12,345.00
12345. ToString ("C"); // generate $12,345.00
12345. ToString ("e"); // generate 1.234500e 004
12345. ToString ("f4"); // generate 12345.0000
12345. ToString ("x"); // generate 3039 (hexadecimal)
12345. ToString ("p"); // generate 1,234,500.00%

4. Variable. Length numeric type
The following is a reference to create a new node for the XML document.

13. parent node. AppendChild (child node );
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Add the new child node to the XML document parent node.

14. parent node. RemoveChild (node );
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Delete a node

15. Response
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Response. Write ("string ");
Response. Write (variable );
Output to the page.
Response. Redirect ("URL address ");
Jump to the page specified by the URL

16. char. IsWhiteSpce (STRING variable, digits) -- Logical type
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Check whether the specified position contains null characters;
For example:
String str = "Chinese people ";
Response. Write (char. IsWhiteSpace (str, 2); // The result is True. The first character is 0, and the second is the third character.

17. char. IsPunctuation (character) -- Logical type
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Check whether a character is a punctuation mark.
For example: Response. Write (char. IsPunctuation (A); // return: False

18, (int) characters
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Convert the character into a number and check the code. Note that it is a single quotation mark.
For example:
Response. Write (int); // The code with the result of a Chinese character: 20013

19. (char) Code
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Convert the number into characters and check the characters represented by the Code.
For example:
Response. Write (char) 22269); // return the word "country.

20. Trim ()
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Clear leading and trailing Spaces

21. string variable. Replace ("substring", "Replace ")
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String replacement
For example:
String str = "China ";
Str = str. Replace ("country", "Central"); // Replace the Chinese character with the central character
Response. Write (str); // The output result is "Central"
Another example is: (this is very practical)
String str = "This Is A <script> script ";
Str = str. replace ("<", "<font> </font> "); // Replace the left angle brackets with <font> and </font> (or <, but it is estimated that the brackets will be restored after being saved in XML)
Response. Write (str); // display as: "This is a <script> script"
If not replaced, <script> is not displayed. If it is a script, it runs. If it is replaced, the script does not run.
The value of this Code is that you can invalidate and display all HTML tags in a text file to protect your interactive websites.
Specific implementation: Add the following code to your form submission button script:
String strSubmit = label1.Text; // label1 is the Control ID for you to submit data.
StrSubmit = strSubmit. Replace ("<", "<font> </font> ");
Then save or output strSubmit.
This method can also be used to easily implement the UBB code.

22. Math. Max (I, j)
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Take the maximum value in I and j.
For example, int x = Math. Max (5, 10); // x, the value is 10.
Add a bit. 23. String comparison ......
Add one.

23. IndexOf (), LastIndexOf ()
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Search for the position where the specified character or string appears for the first time (the last time) in the string, and return the index value, for example:
Str1.IndexOf ("word"); // search for the index value (location) of the word in str1)
Str1.IndexOf ("string"); // search for the index value (location) of the first character of "string" in str1)
Str1.IndexOf ("string", 4th); // query the index value (location) of the first character of the "string" in str1 for 2 characters starting from str1 characters)

24. Insert ()
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Insert the specified character into the specified index position in the string. For example:
Str1.Insert (1, "word"); Insert "word" to the second character of str1. If str1 = "China", it is inserted as "Chinese country ";

25. PadLeft (), PadRight ()
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Add a space or a specified char character to the left (or right) of the string so that the string reaches the specified length, for example:
<%
String str1 = "Chinese ";
Str1 = str1.PadLeft (); // No second parameter is added with Space
Response. Write (str1); // The result is "1111111 Chinese" and the string length is 10.
%>

26. Remove ()
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Deletes a specified number of characters from a specified position.
String comparison is generally used: if (str1 = str2 ){}