我有reactjs组件，该组件将PUT请求发送到Web api控制器，但是接收到的对象（租户）为null。我可以附加远程调试器并注意到这一点。
我的反应成分：
import React, { Component } from 'react';
import { Row, Col } from 'antd';
import PageHeader from '../../components/utility/pageHeader';
import Box from '../../components/utility/box';
import LayoutWrapper from '../../components/utility/layoutWrapper.js';
import ContentHolder from '../../components/utility/contentHolder';
import basicStyle from '../../settings/basicStyle';
import IntlMessages from '../../components/utility/intlMessages';
import { adalApiFetch } from '../../adalConfig';
export default class extends Component {
constructor(props) {
super(props);
this.state = {TenantId: '', TenantUrl: '', TenantPassword: '' };
this.handleChangeTenantUrl = this.handleChangeTenantUrl.bind(this);
this.handleChangeTenantPassword = this.handleChangeTenantPassword.bind(this);
this.handleChangeTenantId= this.handleChangeTenantId.bind(this);
this.handleSubmit = this.handleSubmit.bind(this);
};
handleChangeTenantUrl(event){
this.setState({TenantUrl: event.target.value});
}
handleChangeTenantPassword(event){
this.setState({TenantPassword: event.target.value});
}
handleChangeTenantId(event){
this.setState({TenantId: event.target.value});
}
handleSubmit(event){
event.preventDefault();
const formData = new FormData();
formData.append("TenantId", this.state.TenantId);
formData.append("TenantUrl", this.state.TenantUrl);
formData.append("TenantPassword", this.state.TenantPassword);
const options = {
method: 'put',
data: formData,
config: {
headers: {
'Content-Type': 'multipart/form-data'
}
}
};
adalApiFetch(fetch, "/Tenant", options)
.then(response => response.json())
.then(responseJson => {
if (!this.isCancelled) {
this.setState({ data: responseJson });
}
})
.catch(error => {
console.error(error);
});
}
upload(e){
let data = new FormData();
//Append files to form data
let files = e.target.files;
for (let i = 0; i < files.length; i++) {
data.append('files', files[i], files[i].name);
}
}
render(){
const { data } = this.state;
const { rowStyle, colStyle, gutter } = basicStyle;
return (
<div>
<LayoutWrapper>
<PageHeader>{<IntlMessages id="pageTitles.TenantAdministration" />}</PageHeader>
<Row style={rowStyle} gutter={gutter} justify="start">
<Col md={12} sm={12} xs={24} style={colStyle}>
<Box
title={<IntlMessages id="pageTitles.TenantAdministration" />}
subtitle={<IntlMessages id="pageTitles.TenantAdministration" />}
>
<ContentHolder>
<form onSubmit={this.handleSubmit}>
<label>
TenantId:
<input type="text" value={this.state.TenantId} onChange={this.handleChangeTenantId} />
</label>
<label>
TenantUrl:
<input type="text" value={this.state.TenantUrl} onChange={this.handleChangeTenantUrl} />
</label>
<label>
TenantPassword:
<input type="text" value={this.state.TenantPassword} onChange={this.handleChangeTenantPassword} />
</label>
<label>
Certificate:
<input onChange = { e => this.upload(e) } type = "file" id = "files" ref = { file => this.fileUpload } />
</label>
<input type="submit" value="Submit" />
</form>
</ContentHolder>
</Box>
</Col>
</Row>
</LayoutWrapper>
</div>
);
}
}
我的租户控制器Put方法
[HttpPut]
public async Task<IHttpActionResult> PutTenant([FromBody]Tenant tenant)
{
var provider = new MultipartMemoryStreamProvider();
var contentType = "";
var content = new byte[0];
await base.Request.Content.ReadAsMultipartAsync(provider);
if (provider.Contents.Count > 0)
{
contentType = provider.Contents[0].Headers.ContentType.MediaType;
content = await provider.Contents[0].ReadAsByteArrayAsync();
}
CloudStorageAccount storageAccount = CloudStorageAccount.Parse(ConfigurationManager.AppSettings["AzureStorageKey"].ToString());
// Create the blob client.
CloudBlobClient blobClient = storageAccount.CreateCloudBlobClient();
// Retrieve reference to a previously created container.
CloudBlobContainer container = blobClient.GetContainerReference(ConfigurationManager.AppSettings["certificatesContainer"].ToString());
// Retrieve reference to a blob named "myblob".
CloudBlockBlob blockBlob = container.GetBlockBlobReference("myblob");
// Create or overwrite the "myblob" blob with contents from a local file.
blockBlob.Properties.ContentType = contentType;
MemoryStream stream = new MemoryStream(content);
blockBlob.UploadFromStream(stream);
var tenantStore = CosmosStoreFactory.CreateForEntity<Tenant>();
tenant.content = content;
tenant.CertificatePath = blockBlob.Uri;
if (!ModelState.IsValid)
{
return BadRequest(ModelState);
}
var added = await tenantStore.AddAsync(tenant);
return StatusCode(HttpStatusCode.NoContent);
}
和租户POCO
public class Tenant
{
public string TenantId { get; set; }
public string TenantUrl { get; set; }
public Uri CertificatePath { get; set; }
public string CertificatePassword { get; set; }
public byte[] content { get; set; }
public override string ToString()
{
return JsonConvert.SerializeObject(this);
}
}
stacktrace：
" at System.Net.Http.Formatting.Parsers.MimeMultipartBodyPartParser.ValidateArguments(HttpContent content, Int64 maxMessageSize, Boolean throwOnError)
at System.Net.Http.Formatting.Parsers.MimeMultipartBodyPartParser..ctor(HttpContent content, MultipartStreamProvider streamProvider, Int64 maxMessageSize, Int32 maxBodyPartHeaderSize)
at System.Net.Http.HttpContentMultipartExtensions.<ReadAsMultipartAsync>d__0`1.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at System.Runtime.CompilerServices.TaskAwaiter`1.GetResult()
at TenantManagementWebApi.Controllers.TenantController.<PutTenant>d__2.MoveNext() in C:\Users\levm3\source\repos\TenantManagementWebApi\Controllers\TenantController.cs:line 48
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at System.Threading.Tasks.TaskHelpersExtensions.<CastToObject>d__3`1.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at System.Web.Http.Controllers.ApiControllerActionInvoker.<InvokeActionAsyncCore>d__0.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at System.Web.Http.Controllers.ActionFilterResult.<ExecuteAsync>d__2.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at System.Web.Http.Filters.AuthorizationFilterAttribute.<ExecuteAuthorizationFilterAsyncCore>d__2.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at System.Web.Http.Dispatcher.HttpControllerDispatcher.<SendAsync>d__1.MoveNext()"
我想我的问题出在react而不是webapi中，如何更改我的react组件以使其正常工作？
答案 0 :(得分：2)
应该发送JSON对象而不是发送多部分表单数据 来自React组件的服务器
这将使您的生活更轻松。
示例
fetch('https://mywebsite.com/endpoint/', {
method: 'POST',
headers: {
'Accept': 'application/json',
'Content-Type': 'application/json',
},
body: JSON.stringify({
firstParam: 'yourValue',
secondParam: 'yourOtherValue',
})
})
参考：- React Native Docs
然后在c＃中对此进行更改
public async Task<IHttpActionResult> PutTenant(Tenant tenant)
更新：-如何将文件上传到服务器
根据this，您有3个选择
但是如果您之间的交流不频繁，我希望转换为base64。
所以您必须遵循以下步骤