DotnetJs

.Net Framework support in javascript

Get DotnetJs

1. Nodejs

   firstly, run npm install dotnetjs --save

   If you are using typescript:

   import * as DotnetJs from 'dotnetjs';

   else just like the others:

   var DotnetJs = require('dotnetjs');

2. Browser

   run npm install dotnetjs --save

   or download the files in the dist directory.

   or run bower install dotnetjs

   <!--if debug-->
   <script src="dotnet.js"></script>
   <!--if release-->
   <script src="dotnet.min.js"></script>
   <script src="your.js"></script>

   in your .ts file:

   /// <reference path="dotnet.d.ts" />

Work with DotnetJs

DotnetJs uses similiar interface as it is in .Net Framework.

Linq

If you are about to use complicated Linq Expressions, first make a instance of LinqIntermediate by using LinqStart:

var expression = DotnetJs.Linq.LinqStart(enumerable);

the enumerable can be any type that implements IEnumerable, in addition, I implemented it for the Array. Then you can do like the following:

expression.Where(...).Select(...).ToArray();

Or use:

DotnetJs.Linq.Where(enumerable, ...).Select(...).ToArray();

remember to use ToArray or ToList or ToDictionary to end the expression(if the result is still IEnumerable). No matter how long your linq is, the time complexity is always O(n).

String Format

The match case: {index[,alignment][:format]}, with 2 optional parameters (alignment and format).

1. index

   Index indicate the index of the object in the following parameter args[].

2. alignment

   Alignment will do PadLeft or PadRight with spaces, if it is positive then do PadLeft, else do PadRight.

3. format

   With the magic char ':', you can control the format of your toString method. For number, there are specifiers ['D', 'E', 'F', 'G', 'N', 'P', 'X'] implemented, usage portal. Now, let's see the following example:

   var number = 1.0437E21;
   var specifier = 'G';
   console.writeLine("   {0,-22} {1:G}", specifier + ":", number);
   // output:   G:                     1.0437e+21
    
   class Foo {
       public bar: number;
       public toString(format: string) {
           if (format == null)
               return this.bar.toString();
           if (format == '!')
               return '!' + this.bar;
           return '?' + this.bar;
       }
   }
    
   var foo = new Foo();
   foo.bar = 65521;
    
   console.log(String.Format('test Foo toString: {0:!}, {0:?}, {0,10}', foo));
   // output: test Foo toString: !65521, ?65521,      65521

Indexer for the collections

As there isn't have a way to implement indexer in typescript. You have to call the element of List or IDictionay, by using GetValue(index || key) and SetValue(index || key, value), but not collection[index || key].

GetHashCode

Both object, string, boolean or number are supported for the GetHashCode Method, actually for the object, it is more likely to be called as a 'unique id'.

To get a new hashcode for an object, call the method with parameter 'ture'. But please becareful, this may due to unexpected errors (e.g.: when you are using Dictionary).

Equals

If you inherit from typescript abstract class ValueType, remember to override Equals method, else it will compare the result of GetHashCode() to decide whether it equals to the other.

ContainsKey

var obj = { name: 'readme' };
 
console.log(obj.ContainsKey('name'));
// output: true

TODO

More extensions. If you have any idea, please feel free to contact me.

Test

Change directory to tests, then run tsc to compile the typescript files, then run npm link ../ secondly, to set up the local dependence, finally run node index.js to start the test.

Contributors

Master76 Author

AsherWang RegExp suport