Original article address:
Http://www.dotblogs.com.tw/puma/archive/2009/05/28/asp.net-generic-list-sort-find-findall-exsit.aspx#12190
List is often used in recent cases. This is really useful.
Because it has the following things:
List <t>. Sort () → sort t
List <t>. Find () → find a t
List <t>. findall () → find multiple T
List <t>. exist () → judge whether the existence of limit t exists
Let's talk about these things ..
Genericlist. aspx
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<% @ Page Language = "C #" autoeventwireup = "true" codefile = "genericlist. aspx. cs" inherits = "genericlist" %> |
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<! Doctype HTML public "-// W3C // dtd xhtml 1.0 transitional // en" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> |
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<Html Xmlns=Http://www.w3.org/1999/xhtml"> |
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<Title> Genericlist </Title> |
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<Form ID="Form1" Runat="Server"> |
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<ASP: gridview ID="Gridview1" Runat="Server"> |
Genericlist. aspx. CS
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002 |
Using System. Collections. Generic; |
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Using System. Web. UI; |
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Using System. Web. UI. webcontrols; |
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Public Partial Class Genericlist: system. Web. UI. Page |
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Protected Void Page_load (Object Sender, eventargs E) |
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List <person> lstperson =New List <person> (); |
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Lstperson. Add (New Person (1,"Puma", 10 )); |
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Lstperson. Add (New Person (2,"F6 team", 20 )); |
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Lstperson. Add (New Person (3,"ASP. NET", 30 )); |
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Lstperson. Add (New Person (4,"Dotblogs", 40 )); |
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// Raw information is displayed on the gridview |
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This. Gridview1.datasource = lstperson; |
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This. Gridview1.databind (); |
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// Find the person whose name is 'puma' |
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Response. Write ("Find the person with name = 'puma '→"); |
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Response. Write (lstperson. Find (Delegate(Person p ){Return P. Name ="Puma";}). Tostring () +"<P>"); |
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// List <t>. findall () |
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// Locate the number of age> 10 |
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Response. Write ("Find the number of age> 10 →"); |
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Response. Write (lstperson. findall (Delegate(Person p ){Return P. age> 10;}). Count. tostring () +"<P>"); |
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// List <t>. exists () |
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// Check whether name = 'f6 'exists |
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Response. Write ("Checking whether name = 'f6 'exists →"); |
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Response. Write (lstperson. exists (Delegate(Person p ){Return P. Name ="F6";}). Tostring () +"<P>"); |
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// Sort by name in ascending order |
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Response. Write ("<P> sort by name in ascending order <br/>"); |
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Lstperson. Sort (Delegate(Person P1, person P2 ){Return Comparer <String>. Default. Compare (p1.name, p2.name );}); |
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Foreach (Person PIn Lstperson) |
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Response. Write (P. tostring () +"<Br/>"); |
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// Sort by name in descending order |
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Response. Write ("<P> sort by name in descending order <br/>"); |
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Lstperson. Sort (Delegate(Person P1, person P2 ){Return Comparer <String>. Default. Compare (p2.name, p1.name );}); |
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Foreach (Person PIn Lstperson) |
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Response. Write (P. tostring () +"<Br/>"); |
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Private String _ Name; |
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Public Person (Int ID,String Name,Int Age) |
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Set {_ Name = value ;} |
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Get {Return _ Name ;} |
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Set {_ Age = value ;} |
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Public Override String Tostring () |
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Return String. Format ("ID: {0}, name: {1}, age: {2 }", _ Id, _ name, _ age ); |
The result of the rows:
Exam Website:
Http://blogs.msdn.com/kcwalina/archive/2004/06/22/162533.aspx
Http://www.dotblogs.com.tw/chhuang/archive/2008/05/08/3908.aspx
