C # common functions and method set 3, variable.tostring () character type conversion 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 (16) 12345.toString ("P "); // Generate 1,234,500.00%
5, system.text.Encoding.default.getbytes (variable) word conversion to a ratio code such as: Byte [] Bytstr = system.text.encoding.default.getbytes (STR); then get a bit length: len = BYTSTR.LENGTH;
7, variable. Substring (parameter 1, parameter 2); part of the interception string, parameter 1 is the left start bit number, parameter 2 is intercepted several bits. Such as: string s1 = str.substring (0, 2);
8, string user_ip = request.servervariables ["remote_addr"]. TOSTRING (); Take a remote user IP address
9, pass the proxy server to take a remote user real IP address: if (Request.ServerVariables ["http_via"]! = Null) {string user_ip = request.serverVariables ["http_forwarded_for"]. Tostring ();} else {string user_ip = Request.servervariables ["remote_addr"]. TOSTRING ();
10, session ["Variable"]; Access Session Value; if, assignment: session ["username"] = "small Bush";
Value: Object objName = session ["Username"]; string strname = objName.toTString (); empty: session.removeall ();
11, string str = request.QueryString ["Variable"]; use hyperlink to transfer the variable. If you build a hyperlink in either page: Click in edit.aspx page: string str = request.queryString ["fdid"];
12, DOC object .CreateElement ("New Name Name"); Create a new node of XML document
13, parent node .Appendchild (child node); add the new child node to the XML document parent node
14, parent node. Removechild (node); delete node
15, response 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 - logical check specify whether the location is empty; such as: string str = "Chinese people"; response.write (str, 2)); // The result is: True, the first character is 0 bits, 2 is the third character. 17. Char.Ispunctuation ('character') - logical symbols are punctuation, such as: response.write (char.ispunctuation ('a')); // Return: false
18, (int) 'characters' turn the character into a number, check the code point, pay attention to the single quotation. Such as: response.write (int) '); / / The result is the code: 20013
19, (char) code converts the number into characters, checks the characters represented by the code. Such as: response.write ((char) 22269); // Returns the word "country".
20, TRIM () Clear String Space
21, string variable.Replace ("Sub-string", "replace") string replacement, such as: string str = "China"; str = str.replace ("Country", "Central"); // Put national characters Change to CCR RESPONSE.WRITE (STR); // Output results are "central"
Another example: (this very practical)
