A .net core interpreter for blockly, allowing you to execute blockly programs in .NET.
Via nuget:
PM> Install-Package IronBlock
or
> dotnet add package IronBlock
Firstly, in JavaScript save your blockly workspace as an XML file:
var xml = Blockly.Xml.workspaceToDom(workspace);The blockly code demo allows you to view the XML of your workspace.
The XML will look something like this:
<xml>
<block type="text_print">
<value name="TEXT">
<shadow type="text">
<field name="TEXT">Hello World</field>
</shadow>
</value>
</block>
</xml>You'll need to pass this XML to your .NET server using an Ajax call or similar.
You can then parse the XML, and execute the Blockly program in .NET.
using IronBlock;
using IronBlock.Blocks;
// create a parser
var parser = new Parser();
// add the standard blocks to the parser
parser.AddStandardBlocks();
// parse the xml file to create a workspace
var workspace = parser.Parse(xml);
// run the workspace
var output = workspace.Evaluate();
// "Hello World"
// you can optionally pass in a dictionary of variables
var args = new Dictionary<string,object>();
args.Add("message", "Hello!");
workspace.Evaluate(args);
// if your program sets any variable values,
// you can read then out of the args dictionary Blockly has a block designer allowing you to create your own blocks very easily.
Custom blocks can be implemented in C# by inheriting IBlock:
public class MyCustomBlock : IBlock
{
public override object Evaluate(Context context)
{
// read a field
var myField = this.Fields.Get("MY_FIELD");
// evaluate a value
var myValue = this.Values.Evaluate("MY_VALUE", context);
// evaluate a statement
var myStatement = this.Statements.Get("MY_STATEMENT");
myStatement.Evaluate(context); // evaluate your statement
// if your block returns a value, simply `return myValue`
// if your block is part of a statment, and another block runs after it, call
base.Evaluate(context);
return null;
}
}You can then register your block and run it:
var parser = new Parser();
parser.AddBlock<MyCustomBlock>("my_custom_block");
var workspace = parser.Parse(xml);
workspace.Evaluate();MIT
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