C#-webform-js Chuanjiang: Basic part, BOM part, Dom part

First, the basic part:

1. What is JavaScript?

is a scripting language , is a weak type (language grammar is very casual), C # is strongly typed (language syntax is very strict)(Li brainstorming lxc)

Advantages: JS execution Speed is fast

2. What is the relationship between JS and Java? It doesn't matter.

3, JS can do what things?

Ability to control browser BOM

Control Element DOM

JS can't do what?

Cannot manipulate files (read, create, delete)

Cannot Access database directly

Extension: node. JS-a development platform through which you can develop a regular web service side, a very lightweight running environment

Jquery.js-Front frame

4, JS is a process-oriented language also some people say JS has object-oriented, but he is not a purely object-oriented language

Second, the common dialog box

Alert ("string")-warning dialog box, popup string content

Confirm ()-Confirmation dialog box

Prompt ("", "")-Input dialog box

Third, JavaScript syntax

1. Basic Data type

String, Decimal, Integer, Date time, Boolean type

2. Variables: Only one type var (universal variable)

3, data type conversion string type highest precedence

<script type="text/javascript">var a=; var b="ten"; var c=++ + C ++ C + parseint (b)); </script>

4, text box digital verification (Li Brainstorming lxc)

<script>varTxt1 = document.getElementById ("TextBox1"); //trigger when button is liftedTxt1.onkeyup =function () {if(IsNaN ( This. Value)) {             This. Value = This. VALUE.SUBSTR (0, This. value.length-1);    }    }; //Txt1.onchange = function () {};//triggered when the focus is lost//Txt1.onkeydown = function () {};//triggered when the button is pressed</script>

5. Operators with C #

6. Statements

Branch Statement If...else If...else

Loop statement for (int i=0;i<=k;i++) {}

7. Arrays

Similar to collections in C #, not fixed-length, non-fixed type

Assignment: Assign a value directly with an index without add

Empty: With a foreach loop, array[i]=null;

Quantity: Length;

8. Functions

No parameter no return, no return, no parameter, no return, no parameter returned type, direct return

Recursion: Self Tune Yourself

　　

Iv. BOM Operation

1. window.open-Open Page

window.open ("page path", "Whether new form", "new form format");

New form format: width, height new form wide height left, top new form position

Open a new form is not able to change the contents of the Address bar

2, Opener: Open the source window of the current window, if the current window is the first time the browser opened, then opener is null;

Window.close ();

Window.opener.location.href= "";

Reopen the previous form and guide the URL, if it is a previous level URL, there is a refresh effect

: Click Button2 to close Button1 open form

3, window.navigate ("url"), jump to the target page

Window.moveto (x, y); Move page to coordinates

Window.resizeto (width,height); Change page length and width

　　Window.scrollto (x, y); scroll page to where

4, Window.history.back (); page back

Window.history.forward (); page forward

Window.history.go (n); page jump to

C#-webform-js Chuanjiang: Basic part, BOM part, Dom part