Get and Post usage in ASP. NET

Use of get and post in asp tutorial. net

In form submission, the difference between the get and post methods in the asp.net tutorial is summarized as follows:

1. get is to get data from the server, and post is to send data to the server.

2. get is to add the parameter data queue to the url referred to by the action attribute of the submission form. The values correspond to each field in the form one by one and can be seen in the url. Post uses the http post mechanism to place fields in the form and their content in the html header and send them to the url address referred to by the action attribute. You cannot see this process.

3. For the get method, the server uses request. querystring to obtain the value of the variable. For the post method, the server uses request. form to obtain the submitted data.

4. The data volume transmitted by get is small and cannot exceed 2 kb. The amount of data transmitted by post is large, which is generally not restricted by default. Theoretically, the maximum size of iis4 is 80 KB, and that of iis5 is 100kb.

5. Low get security and high post security. However, the execution efficiency is better than the post method.

Suggestion:

1. The get method is more secure than the post method. If it contains confidential information, we recommend that you use the post data submission method;

2. We recommend that you use the get Method for Data Query. We recommend that you use the post Method for Data addition, modification, or deletion.

/* The difference between asp.net get and post can be seen from the url. How can we program the data reception?
There are 1st types of data to be transmitted using the get method:
*/

Protected void page_load (object sender, eventargs e)
{
String id = request. querystring ["name"];
String website = request. querystring ["website"];
Response. write (id + "<br>" + website );
 
Response. write ("you are using" + request. requesttype + "Data Transmission ");
 
}

// There are 2nd types of data that are transmitted using the post method:

Protected void page_load (object sender, eventargs e)
{

String id2 = request. form ["name2"];
String website2 = request. form ["website2"];
Response. write (id2 + "<br>" + website2 );
 
 
Response. write ("you are using" + request. requesttype + "Data Transmission ");
 
}
 
String id4 = request ["name4"];
String website4 = request ["website4"];
Response. write (id4 + "<br>" + website4 );
 

// 3rd types of code that accepts both the get and post methods for data transmission:
// Write a statement

String id3 = request. params ["name3"];
String website3 = request. params ["website3"];
Response. write (id3 + "<br>" + website3 );
 
// Write B

String id4 = request ["name4"];
String website4 = request ["website4"];
Response. write (id4 + "<br>" + website4 );

 

Msdn: request objectrequest
Request. form: Get the data submitted in post mode (receive the data submitted by form );
Request. querystring: get the address bar parameters (data submitted in get Mode)
Request: contains the preceding two methods (obtain the data submitted by the get method first), which are searched in order in querystring, form, and servervariable. And sometimes different results will be obtained. If you only need a piece of data in form, but you use request instead of request. form, the program will also search for it in querystring and servervariable. If the same name exists in your querystring or servervariable, you don't get the expected value.
Request. params is a set of all post and get values. params is actually a set, which in turn includes request. querystring, request. form, request. cookies and requests. servervariable.