我是新来的反应者，正在使用Web api post，get，put删除方法向引导表添加或删除值。我正在使用post方法将值添加到引导表，这使我在添加值时成功添加，如果添加失败，则说添加失败。我意识到我的日期选择器会获取日期和时间的值，而Web api中的值只是日期，因此我添加了一个字符串doj以仅添加日期。但是它仍然显示添加失败。
以下是在Visual Studio代码中进行反应的代码：
class AddEmpModal extends Component{
constructor(props){
super(props);
this.state = {deps:[],sanackbaropen: false, snackbarmsg:''};
this.handleSubmit = this.handleSubmit.bind(this);
}
componentDidMount()
{
fetch('https://localhost:44363/api/department')
.then(response=> response.json())
.then(data=>{
this.setState({deps:data});
});
}
snackbarClose = (event) =>{
this.setState({snackbaropen:false});
};
handleSubmit(event){
event.preventDefault();
fetch('https://localhost:44363/api/Employee',{
method:'POST',
headers:{
'Accept':'application/json',
'Content-Type':'application/json'
},
body:JSON.stringify({
EmployeeID:null,
EmployeeName: event.target.EmployeeName.value,
Department: event.target.Department.value,
MailID: event.target.MailID.value,
DOJ: event.target.DOJ.value,
})
})
.then(res=> res.json())
.then((result)=>
{
//alert(result);
this.setState({snackbaropen:true,snackbarmsg:result})
},
(error)=>{
// alert('Failed')
this.setState({snackbaropen:true,snackbarmsg:'failed'})
})
}
render(){
return(
<div className="container">
<Snackbar
anchorOrigin={{vertical:"top",horizontal:'center'}}
open ={this.state.snackbaropen}
autoHideDuration = {3000}
onClose={this.snackbarClose}
message = {<span id= "message-id">{this.state.snackbarmsg}</span>}
action={[
<IconButton
key="close"
aria-label="Close"
color="inherit"
onClick={this.snackbarClose}
>
X
</IconButton>
]} />
<Modal
{...this.props}
size="lg"
aria-labelledby="contained-modal-title-vcenter"
centered
>
<Modal.Header closeButton>
<Modal.Title id="contained-modal-title-vcenter">
Add Employee
</Modal.Title>
</Modal.Header>
<Modal.Body>
<Row>
<Col sm={6}>
<Form onSubmit={this.handleSubmit}>
<Form.Group controlId="EmployeeName">
<Form.Label>Employee Name</Form.Label>
<Form.Control
type = "text"
name="EmployeeName"
required
placeholder="Employee Name"
/>
</Form.Group>
<Form.Group controlId="Department">
<Form.Label>Department</Form.Label>
<Form.Control as="select">
{this.state.deps.map(dep =>
<option key={dep.DepartmentID}>{dep.DepartmentName}</option>
)}
</Form.Control>
</Form.Group>
<Form.Group controlId="MailID">
<Form.Label>Employee Name</Form.Label>
<Form.Control
type = "text"
name="MailID"
required
placeholder="MailID"
/>
</Form.Group>
<Form.Group controlId="DOJ">
<Form.Label>DOJ</Form.Label>
<Form.Control
type = "date"
name="DOJ"
required
placeholder="DOJ"
/>
</Form.Group>
<Form.Group>
<Button variant="primary" type ="submit">
Add Employee
</Button>
</Form.Group>
</Form>
</Col>
</Row>
</Modal.Body>
<Modal.Footer>
<Button variant= "danger" onClick={this.props.onHide}>Close</Button>
</Modal.Footer>
</Modal>
</div>
);
}}
export default AddEmpModal;
这是Web api员工控制器Visual Studio的代码：
namespace WebAPI.Controllers
{
public class EmployeeController : ApiController
{
public HttpResponseMessage Get()
{
DataTable table = new DataTable();
string query = @"
select EmployeeID,EmployeeName,Department,
MailID,
convert(varchar(10),DOJ,120) as DOJ
from dbo.Employees";
using (var con = new SqlConnection(ConfigurationManager.ConnectionStrings["EmployeeAppDB"].ConnectionString))
using (var cmd = new SqlCommand(query, con))
using (var da = new SqlDataAdapter(cmd))
{
cmd.CommandType = CommandType.Text;
da.Fill(table);
}
return Request.CreateResponse(HttpStatusCode.OK, table);
}
public string Post(Employee emp)
{
try
{
DataTable table = new DataTable();
string doj = emp.DOJ.ToString().Split(' ')[0];
string query = @"
insert into dbo.Employees
(EmployeeName,
Department,
MailID,
DOJ)
Values
(
'" + emp.EmployeeName + @"',
'" + emp.Department + @"',
'" + emp.MailID + @"',
'" + emp.DOJ + @"'
)
";
using (var con = new SqlConnection(ConfigurationManager.ConnectionStrings["EmployeeAppDB"].ConnectionString))
using (var cmd = new SqlCommand(query, con))
using (var da = new SqlDataAdapter(cmd))
{
cmd.CommandType = CommandType.Text;
da.Fill(table);
}
return "Added Successfully";
}
catch (Exception )
{
return "Failed to Add";
}
}
public string Put(Employee emp)
{
try
{
DataTable table = new DataTable();
string query = @"
update dbo.Employees set
EmployeeName = '" + emp.EmployeeName + @"'
,Department = '" + emp.Department + @"'
,MailID= '" + emp.MailID + @"'
,DOJ = '" + emp.DOJ + @"'
where EmployeeID = " + emp.EmployeeID + @"
";
using (var con = new SqlConnection(ConfigurationManager.ConnectionStrings["EmployeeAppDB"].ConnectionString))
using (var cmd = new SqlCommand(query, con))
using (var da = new SqlDataAdapter(cmd))
{
cmd.CommandType = CommandType.Text;
da.Fill(table);
}
return "Updated Successfully";
}
catch (Exception)
{
return "Failed to Update";
}
}
public string Delete(int id)
{
try
{
DataTable table = new DataTable();
string query = @"
delete from dbo.Employees where EmployeeID = " + id;
using (var con = new SqlConnection(ConfigurationManager.ConnectionStrings["EmployeeAppDB"].ConnectionString))
using (var cmd = new SqlCommand(query, con))
using (var da = new SqlDataAdapter(cmd))
{
cmd.CommandType = CommandType.Text;
da.Fill(table);
}
return "Deleted Successfully";
}
catch (Exception)
{
return "Failed to Delete";
}
}
}
}
我在Web api员工控制器的POST方法中添加了此代码，以仅获取日期
string doj = emp.DOJ.ToString().Split(' ')[0];
但是它仍然显示添加失败。有人可以帮我吗？