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asp.net use for loop to implement DataList display function _ Practical skills

server controls, while convenient to use, also sacrifice performance, and sometimes seem accuse. Hope that advanced friends more advice. Copy Code code as follows: Engineering performance--with a for loop instead of the DataList multiple-column display, get 2 rows of four columns of the table, requires a memory table of 8 rows of data private void Gcyjshow () { StringBuilder sb = new StringBuilder (); PRODUCTBLL PB = new Productbll ();

JSON string Generation Tool

add (string key, JSON ){Addelement (Key, JSON );} Public String tostring (){Stringbuilder sb = new stringbuilder ();SB. append ("{");Int K = 0;For (iterator I = map. keyset (). iterator (); I. hasnext ();){String key = (string) (I. Next ());Object OBJ = map. Get (key );If (k> 0 ){SB. append (",");}Appendkey (SB, key )

JSON Getting Started Guide

data Next we will discuss how to output data in JSON format on the server side. Taking Java as an example, we will demonstrate how to encode a Java object as a JSON text. When you encode a String object in JSON format, you only need to process special characters. In addition, the string must be (") rather: Static string string2json (string s ){Stringbuilder sb = new stringbuilder (S. Length () + 20 );SB

For more information about JSON, see the json Getting Started Guide.

by the server to a variable. Many Ajax frameworks already include the ability to process JSON data, such as Prototype (a popular JavaScript Library: http://prototypejs.org) that provides the evalJSON () method, directly convert the JSON text returned by the server into a JavaScript variable:New Ajax. Request ("http: // url ",{Method: "get ",OnSuccess: function (transport ){Var json = transport. responseText. evalJSON ();// TODO: document. write (json. xxx );}});Server output JSON format dataNex

Android --- 57 --- sensor, android Sensor

optical sensor. registerListener (this, mSensorManager. getdefasensensor (Sensor. TYPE_LIGHT), SensorManager. SENSOR_DELAY_GAME); // registers the listener mSensorManager for the system pressure sensor. registerListener (this, mSensorManager. getdefasensensor (Sensor. TYPE_PRESSURE), SensorManager. SENSOR_DELAY_GAME) ;}@ Overrideprotected void onStop () {mSensorManager. unregisterListener (this); super. onStop () ;}@ Overrideprotected void onPause () {mSensorManager. unregisterListener (this);

Common Methods of onprerender (eventargs e) Events

= false; Base. onprerender (E ); } 5) Add the script block Protected override void onprerender (eventargs E){Base. onprerender (E );Stringbuilder sb = new stringbuilder ();SB. append ("");SB. append ("function toggleratemenu (){");SB. append ("ratemenu = Document. getelementbyid ('ratemenu ');");

Dotnet OnPreRender (EventArgs e) Event Common method _ Practical skills

) ((Literal) FindControl ("Sep1")). Visible = false; if (threadsubbutton.visible = = False) ((Literal) FindControl ("Sep3")). Visible = false; if (ratebutton.visible = = False) ((Literal) FindControl ("Sep2")). Visible = false; Base. OnPreRender (e); } 5) Add script block Copy Code code as follows: protected override void OnPreRender (EventArgs e) { Base. OnPreRender (e); StringBuilder sb = new StringBuilder ();

C # parsing J s ternary operator

Private voidButton1_Click (Objectsender, EventArgs e) { //Conversion stringSTR1 ="expression 1-expression 2: Expression 3"; Str1. IndexOf ('?');//Find your first locationStringBuilder SB =NewStringBuilder (); string[] Str1s = str1. Split ('?'); str1s[0] ="expression 1";//expression 1, string[] Str1ss = str1s[1]. Split (':'); str1ss[0] ="Expression 2"; str1ss[1] ="Expression 3"; Sb

Common DotNet OnPreRender (EventArgs e) Events

"). Visible = false;If (rateButton. Visible = false)(Literal) FindControl ("Sep2"). Visible = false;Base. OnPreRender (e );} 5) Add the script blockCopy codeThe Code is as follows:Protected override void OnPreRender (EventArgs e){Base. OnPreRender (e );StringBuilder sb = new StringBuilder ();Sb. Append ("");Sb. Append ("function ToggleRateMenu (){");

Android sensor (details 2)-common Sensors

sensor. registerListener (this, mSensorManager. getdefasensensor (Sensor. TYPE_AMBIENT_TEMPERATURE), SensorManager. SENSOR_DELAY_GAME );//. register the listener mSensorManager for the system's optical sensor. registerListener (this, mSensorManager. getdefasensensor (Sensor. TYPE_LIGHT), SensorManager. SENSOR_DELAY_GAME );//. register the listener mSensorManager for the system pressure sensor. registerListener (this, mSensorManager. getdefasensensor (Sensor. TYPE_PRESSURE), SensorManager. SENSO

Asp.net uses the for loop to display datalist Columns

Although the server control is easy to use, it also sacrifices the performance, and sometimes it appears to be big and useless. Hope you can give me more advice. CopyCode The Code is as follows: // /// Engineering Performance -- replace datalist with the for loop to display multiple columns. Two rows and four columns of table are obtained, and eight rows of data in the memory table are required. /// Private void gcyjshow () { Stringbuilder sb = new s

Asp.net uses the for loop to display Datalist Columns

Although the server control is easy to use, it also sacrifices the performance, and sometimes it appears to be big and useless. Hope you can give me more advice.Copy codeThe Code is as follows:/// /// Engineering Performance -- replace DataList with the for loop to display multiple columns. Two rows and four columns of table are obtained, and eight rows of data in the memory table are required./// Private void GcyjShow (){StringBuilder sb = new String

Android uses HTTP and TCP Protocols to upload files.

Android uploads files in two ways. The first is HTTP-based httpurlconnection, and the second is TCP-based socket. The difference between the two methods is that there is a cache mechanism in the httpurlconnection when uploading. If a large file is uploaded, memory overflow occurs. If you use TCP socket to upload data, this problem will be solved. HTTP: httpurlconnection 1. Open an httpurlconnection through the URL encapsulation path 2. Set the Request Method and header fields: Content-Type, Cont

ASP. NET MVC simple implementation generates Excel and downloads

Exportexcel (Searchmodel model) {statusmessagedata result=NewStatusmessagedata (); if(model. Data = =NULL|| Model. Data.count 0) {result. MessageType=Statusmessagetype.error; Result. Messagecontent="no data to download"; returnJson (Result); } stringFileglobal =""; //Organize Excel tablesStringBuilder SB =NewStringBuilder ( -); Sb. Append (""); Sb. Ap

Restore the position of the scroll bar after page return (PostBack) _ ax

[Summary] It involves the DTD template standard, which is annoying and has to be determined, Only passed the test in IE browser. This is where vs2008 pages all have this, and will affect the style and script: You can call the restorescroll method directly in page_load. For details, see Code Note.[Code] Using System; Using System. Data; Using System. configuration; Using System. LINQ; Using System. Web; Using System. Web. Security; Using System. Web. UI; Using System. Web. UI. h

Clarified the confusion of string parameters when VB calls APIs

complete, the careful VB mother gave the temporary variable value to the original string variable. This is the problem! This conversion process makes byval varptr x a world different from X! (Read multiple times if you cannot see it for the first time) Let's look at an example: Sub swapptr (SA as string, Sb as string) Dim ltmp as long Copymemory ltmp, SA, 4 Copymemory SA, Sb, 4 Copymemory

Android GPS application: dynamically obtains Location Information

); // obtain the latest Location information from GPS. location Location = locationManager. getLastKnownLocation (LocationManager. GPS_PROVIDER); // display the location information in the location in the EditText updateView (location); // set the location manager to get the GPS location information every 2 seconds. requestLocationUpdates (LocationManager. GPS_PROVIDER, 2000, 8, new LocationListener () {@ Override public void onLocationChanged (Location location) {// update the location updateVi

ASP. NET background gets FLV video address for playback

SOURCE Download: http://download.csdn.net/detail/njxiaogui/7609687Front desk:. aspx"video_content" runat=" server" style=" ">Backstage. CS ( get the address of FLV through the background for video playback ) protected voidPage_Load (Objectsender, EventArgs e) { This. video_content. InnerHtml = Play ("sp.flv",472,385); } Public Static stringPlay (stringUrlintWidthintheight) { stringStrtmp =URL. ToLower (); if(Strtmp.endswith (". flv")) {

Android uses GET and POST methods to upload data to the server

The differences between the two are as follows: The data uploaded by GET is usually very small and has low security performance. The data uploaded by POST is suitable for scenarios with large data volumes, complex data types, and high data security performance requirements. GET and POST are generally used as follows: 1. Steps for passing data to the server using the GET Method 1. Use the Map set to obtain and process dataIf (params! = Null ! Params. isEmpty ()){For (Map. Entry

Sina Weibo Open Platform oauth authorization solution (including code)

. empty, String. empty, "get", timestamp, nonce, String. empty, out normalizeurl, out normalizedreq Uestparameters); Sig = httputility. urlencode (SIG); // construct the request token URL stringbuilder sb = new stringbuilder (URI. tostring (); sb. appendformat ("? Oauth_consumer_key = {0} ", apikey); sb. appendformat ("oauth_nonce = {0} ", Nonce);

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