import React, { Component } from "react";
class LoginForm extends Component {
render() {
return <h1>Login</h1>;
}
}
export default LoginForm; import LoginForm from "./components/loginForm";
//...
function App() {
return (
<React.Fragment>
<NavBar />
<main className="container">
<Switch>
<Route path="/login" component={LoginForm} />
<Route path="/movies/:id" component={MovieForm} />
// ...
</Switch>
</main>
</React.Fragment>
);
} <NavLink className="nav-item nav-link" to="/login"> Login </NavLink>
import React, { Component } from "react";
class LoginForm extends Component {
render() {
return (
<form>
<div className="form-group">
<label htmlFor="username">Username</label>
<input id="username" type="text" className="form-control" />
</div>
<div className="form-group">
<label htmlFor="password">Password</label>
<input id="password" type="password" className="form-control" />
</div>
<button className="btn btn-primary">Login</button>
</form>
);
}
}
export default LoginForm; 
class LoginForm extends Component {
handleSubmit = e => {
console.log("handleSubmit", e);
e.preventDefault();
// call the server
};
render() {
return (
<form onSubmit={this.handleSubmit}>
//... const username = document.getElementById("username").value; class LoginForm extends Component {
username = React.createRef(); <input
ref={this.username}
id="username"
type="text"
className="form-control"
/> handleSubmit = e => {
e.preventDefault();
// call the server
const username = this.username.current.value;
console.log("handleSubmit", username);
}; class LoginForm extends Component {
username = React.createRef();
componentDidMount = () => {
this.username.current.focus();
}; 
<input
autoFocus
ref={this.username}
id="username"
type="text"
className="form-control"
/> class LoginForm extends Component {
state = {
account: { username: "", password: "" }
}; <input
value={this.state.account.username} <input
value={this.state.account.username}
onChange={this.handleChange} handleChange = e => {
const account = { ...this.state.account }; //cloning an object
account.username = e.currentTarget.value;
this.setState({ account });
}; 
handleChange = e => {
const account = { ...this.state.account }; //cloning an object
account[e.currentTarget.name] = e.currentTarget.value;
this.setState({ account });
}; <input
id="password"
name="password"
value={this.state.account.password}
onChange={this.handleChange}
type="password"
className="form-control"
/> 
handleChange = ({ currentTarget: input }) => {
const account = { ...this.state.account }; //cloning an object
account[input.name] = input.value;
this.setState({ account });
}; Warning: A component is changing an uncontrolled input of type text to be controlled. Input elements should not switch from uncontrolled to controlled (or vice versa). Decide between using a controlled or uncontrolled input element for the lifetime of the component. More info: https://fb.me/react-controlled-components
Warning: `value` prop on `input` should not be null. Consider using an empty string to clear the component or `undefined` for uncontrolled components.
import React from "react";
const Input = ({ name, label, value, onChange }) => {
return (
<div className="form-group">
<label htmlFor={name}>{label}</label>
<input
value={value}
onChange={onChange}
id={name}
name={name}
type="text"
className="form-control"
/>
</div>
);
};
export default Input; import Input from "./common/input";
render() {
const { account } = this.state;
return (
<form onSubmit={this.handleSubmit}>
<Input
name="username"
label="Username"
value={account.username}
onChange={this.handleChange}
/>
<Input
name="password"
label="Password"
value={account.password}
onChange={this.handleChange}
/>
<button className="btn btn-primary">Login</button>
</form>
); 
public class Form
{
public string Name { get; set; }
public string Title { get; set; }
public List<BaseElement> Elements { get; set; }
}
public abstract class BaseElement
{
public string Name { get; set; }
public string Title { get; set; }
}
public class Section : BaseElement
{
public List<TextBox> Elements { get; set; }
}
public class TextBox : BaseElement
{
public string Value { get; set; }
public string CssClass { get; set; }
} public class FormBuilderController : Controller
{
//
// GET: /FormBuilder/
public ActionResult Index()
{
var form = new Form();
var section = new Section() { Title = "Basic Info", Name = "section01" };
section.Elements.Add(new TextBox() { Name = "txt1", Title = "First Text Box" });
form.Elements.Add(new TextBox() { Name = "txt1", Title = "Second Text Box" });
var formJson=JsonConvert.SerializeObject(form);
return View(formJson);
}
} <script type="text/ng-template" id="ElementTemplate">
<div ng-if="control.Type == 'JbSection'">
<h2>{{control.Title}}</h2>
<ul>
<li ng-repeat="control in control.Elements" ng-include="'ElementTemplate'"></li>
</ul>
</div>
</script> <script type="text/ng-template" id="element.html">
{{data.label}}
<ul>
<li ng-repeat="element in data.elements" ng-include="'element.html'"></li>
</ul>
</script>
<ul ng-controller="NestedFormCtrl">
<li ng-repeat="field in formData" ng-include="'element.html'"></li>
</ul> قسمت اول، نگاهی به ساختار فایل دیتابیس آن
<PropertyGroup Condition="'$(Configuration)' == 'Debug'"> <TypeScriptModuleKind>commonjs</TypeScriptModuleKind> <TypeScriptCompileOnSaveEnabled>True</TypeScriptCompileOnSaveEnabled> <TypeScriptOutDir>.\Scripts</TypeScriptOutDir> <TypeScriptNoImplicitAny>True</TypeScriptNoImplicitAny> <TypeScriptTarget>ES5</TypeScriptTarget> <TypeScriptRemoveComments>false</TypeScriptRemoveComments> <TypeScriptOutFile></TypeScriptOutFile> <TypeScriptGeneratesDeclarations>false</TypeScriptGeneratesDeclarations> <TypeScriptSourceMap>true</TypeScriptSourceMap> <TypeScriptMapRoot></TypeScriptMapRoot> <TypeScriptSourceRoot></TypeScriptSourceRoot> <TypeScriptNoEmitOnError>true</TypeScriptNoEmitOnError> </PropertyGroup>
Your project file uses a different version of the TypeScript compiler and tools than is currently installed on this machine. No compiler was found at C:\Program Files (x86)\Microsoft SDKs\TypeScript\1.8\tsc.exe. You may be able to fix this problem by changing the <TypeScriptToolsVersion> element in your project file.
C:\Program Files (x86)\Microsoft SDKs C:\Program Files (x86)\MSBuild\Microsoft\VisualStudio\v11.0\ C:\Program Files (x86)\MSBuild\Microsoft\VisualStudio\v12.0\ C:\Program Files (x86)\MSBuild\Microsoft\VisualStudio\v14.0\
@rem Add path to TypeScript Compiler @if exist "%ProgramFiles%\Microsoft SDKs\TypeScript\1.8" set PATH=%ProgramFiles%\Microsoft SDKs\TypeScript\1.8;%PATH% @if exist "%ProgramFiles(x86)%\Microsoft SDKs\TypeScript\1.8" set PATH=%ProgramFiles(x86)%\Microsoft SDKs\TypeScript\1.8;%PATH%
ReSharper -> Options -> Code Editing -> TypeScript -> Inspections -> Typescript language level
Tools -> Options -> ReSharper Options -> Code Inspection -> Settings -> File Masks to Skip -> add *.ts
{
"compilerOptions": {
"target": "es5",
"outDir": "../Scripts",
"module": "commonjs",
"sourceMap": true,
//"watch": true, // JsErrorScriptException (0x30001)
//"compileOnSave": true, // https://github.com/Microsoft/TypeScript/issues/7362#issuecomment-196586037
"experimentalDecorators": true,
"emitDecoratorMetadata": true
}
} 
using System.Collections.Generic;
using System.Text.Json;
namespace JsonTests
{
public class Product
{
public int Id { get; set; }
public string Name { get; set; }
public bool IsInStock { get; set; }
}
class Program
{
static void Main(string[] args)
{
var products = JsonSerializer.Deserialize<List<Product>>("[{\"Id\":1026,\"Name\":\"P1\",\"IsInStock\":\"false\"}]");
}
}
} An unhandled exception of type 'System.Text.Json.JsonException' occurred in System.Text.Json.dll Inner exceptions found, see $exception in variables window for more details. Innermost exception System.InvalidOperationException : Cannot get the value of a token type 'String' as a boolean.
public class BooleanConverter : JsonConverter<bool>
{
public override bool Read(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options)
{
var value = reader.GetString();
if (value.Equals("true", StringComparison.OrdinalIgnoreCase)
|| value.Equals("yes", StringComparison.OrdinalIgnoreCase)
|| value.Equals("1", StringComparison.Ordinal))
{
return true;
}
if (value.Equals("false", StringComparison.OrdinalIgnoreCase)
|| value.Equals("no", StringComparison.OrdinalIgnoreCase)
|| value.Equals("0", StringComparison.Ordinal))
{
return false;
}
throw new NotSupportedException($"`{value}` can't be converted to `bool`.");
}
public override void Write(Utf8JsonWriter writer, bool value, JsonSerializerOptions options)
{
switch (value)
{
case true:
writer.WriteStringValue("true");
break;
case false:
writer.WriteStringValue("false");
break;
}
}
} public abstract class JsonConverter<T> : JsonConverter
{
protected internal JsonConverter();
public override bool CanConvert(Type typeToConvert);
public abstract T Read(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options);
public abstract void Write(Utf8JsonWriter writer, T value, JsonSerializerOptions options);
} var options = new JsonSerializerOptions();
options.Converters.Add(new BooleanConverter());
var products = JsonSerializer.Deserialize<List<Product>>(
"[{\"Id\":1026,\"Name\":\"P1\",\"IsInStock\":\"false\"}]",
options); [JsonConverter(typeof(BooleanConverter))]
public bool IsInStock { get; set; } var options = new JsonSerializerOptions() {WriteIndented = true };
options.Converters.Add(new BooleanConverter());
var data = JsonSerializer.Serialize<List<Product>>(productList, options); 