我是React的新手。我试图在asp.net中创建一个表单并做出反应。当在mvc asp.net中将表单数据从reactjs发布到控制器时,数据没有被传递。我在下面分享了我的代码。请让我知道我必须做出哪些改变才能使其发挥作用。
控制器:
[Route("InputEmployee")]
public void InputEmployee([FromBody]EmployeeTable Employee)
{
db.EmployeeTables.Add(Employee);
db.SaveChanges();
}
Reactjs代码:
class InputValues extends React.Component {
constructor(props) {
super(props);
this.handleSubmit = this.handleSubmit.bind(this);
}
handleSubmit(e) {
e.preventDefault();
const data = new FormData();
data.append = this.firstName.value;
data.append = this.lastName.value;
data.append = this.gender.value;
data.append = this.designation.value;
data.append = this.salary.value;
data.append = this.city.value;
data.append = this.country.value;
var xhr = new XMLHttpRequest();
xhr.open('post', this.props.url, true);
xhr.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
xhr.onreadystatechange = function() {
if(xhr.readyState == XMLHttpRequest.DONE && xhr.status == 200) {
// Do something on success
}
}
xhr.send(data);
}
render() {
return(
<div>
<form onSubmit={this.handleSubmit}>
<label htmlFor="FirstName">First Name </label><br/>
<input id="FirstName" type="text" placeholder="Enter First Name" ref={(firstName) => this.firstName = firstName} />
<br/><br/>
<label htmlFor="LastName">Last Name: </label><br/>
<input id="LastName" type="text" placeholder="Enter Last Name" ref={(lastName) => this.lastName = lastName} />
<br/><br/>
<label htmlFor="Gender">Gender: </label><br/>
<input id="Gender" type="text" placeholder="Gender" ref={(gender) => this.gender = gender} />
<br/><br/>
<label htmlFor="Designation">Designation: </label><br/>
<input id="Designation" type="text" placeholder="Enter Designation" ref={(designation) => this.designation = designation} />
<br/><br/>
<label htmlFor="Salary">Salary: </label><br/>
<input id="Salary" type="number" placeholder="Enter Salary" ref={(salary) => this.salary = salary} />
<br/><br/>
<label htmlFor="City">City: </label><br/>
<input id="City" type="text" placeholder="Enter City" ref={(city) => this.city = city} />
<br/><br/>
<label htmlFor="Country">Country: </label><br/>
<input id="Country" type="text" placeholder="Enter Country" ref={(country) => this.country = country} />
<p>
<button type="submit">Submit</button>
</p>
</form>
</div>
);
}
};
ReactDOM.render(<InputValues url="api/Employee/InputEmployee" />,
document.getElementById('grid1'))
值未通过:
在追加后更改:
答案 0 :(得分:2)
您没有正确构建FormData
对象,append是一个函数,因此您需要使用它:
data.append = ...; // wrong, overwrites the append function
data.append('key', 'value'); // correct, calls the function
另外,我建议使用本地Fetch API发送Web请求,因为它比使用原始XHR请求更加整洁。它不是100%跨浏览器,但有各种库可以用作polyfill,例如whatwg-fetch