C# webapi,如何使用自定义模型绑定器从POST/PUT操作读取文件
我有以下react组件,显然工作正常:C# webapi,如何使用自定义模型绑定器从POST/PUT操作读取文件,c#,asp.net,reactjs,asp.net-web-api,asp.net-web-api2,C#,Asp.net,Reactjs,Asp.net Web Api,Asp.net Web Api2,我有以下react组件,显然工作正常: 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/u
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();
let data = new FormData();
//Append files to form data
data.append("model", {"TenantId": this.state.TenantId, "TenantUrl": this.state.TenantUrl, "TenantPassword": this.state.TenantPassword });
let files = this.state.selectedFiles;
for (let i = 0; i < files.length; i++) {
data.append("file", files[i], files[i].name);
}
const options = {
method: 'put',
body: data,
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 files = e.target.files;
this.setState({ 'selectedFiles': files });
}
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>
);
}
}
import React,{Component}来自'React';
从“antd”导入{Row,Col};
从“../../components/utility/PageHeader”导入PageHeader;
从“../../components/utility/Box”导入框;
从“../../components/utility/LayoutWrapper.js”导入LayoutWrapper;
从“../../components/utility/ContentHolder”导入ContentHolder;
从“../../settings/basicStyle”导入basicStyle;
从“../../components/utility/IntlMessages”导入IntlMessages;
从“../../adalConfig”导入{adalApiFetch};
导出默认类扩展组件{
建造师(道具){
超级(道具);
this.state={TenantId:'',TenantUrl:'',TenantPassword:''};
this.handlechangetranturl=this.handlechangetranturl.bind(this);
this.handlechangetantpassword=this.handlechangetantpassword.bind(this);
this.handlechangetantid=this.handlechangetantid.bind(this);
this.handleSubmit=this.handleSubmit.bind(this);
};
handleChangeTenantUrl(事件){
this.setState({TenantUrl:event.target.value});
}
handleChangeTenantPassword(事件){
this.setState({TenantPassword:event.target.value});
}
handlechangetrantid(事件){
this.setState({TenantId:event.target.value});
}
handleSubmit(事件){
event.preventDefault();
let data=new FormData();
//将文件附加到表单数据
data.append(“model”,{“TenantId”:this.state.TenantId,“tenantur”:this.state.tenantur,“TenantPassword”:this.state.TenantPassword});
让files=this.state.selectedFiles;
for(设i=0;iresponse.json())
.然后(responseJson=>{
如果(!this.isCancelled){
this.setState({data:responseJson});
}
})
.catch(错误=>{
控制台错误(error);
});
}
上传(e){
让files=e.target.files;
this.setState({'selectedFiles':files});
}
render(){
const{data}=this.state;
const{rowStyle,colStyle,gutter}=basicStyle;
返回(
{}
租户:
租户:
租户密码:
证书:
this.upload(e)}type=“file”id=“files”ref={file=>this.fileUpload}/>
);
}
}
但是,我有一个自定义模型活页夹,如下所示:
public bool BindModel(HttpActionContext actionContext, ModelBindingContext bindingContext)
{
if (bindingContext.ModelType != typeof(Tenant))
{
return false;
}
var task = Task.Run(async () =>
{
var model = new Tenant();
if (!actionContext.Request.Content.IsMimeMultipartContent())
{
bindingContext.ModelState.AddModelError(bindingContext.ModelName, "WebRequeest content 'multipart/form-data' is valid");
}
else
{
var provider = await actionContext.Request.Content.ReadAsMultipartAsync();
var fileContent = provider.Contents.FirstOrDefault(n => n.Headers.ContentDisposition.Name.Equals("file"));
if (fileContent == null)
{
bindingContext.ModelState.AddModelError(bindingContext.ModelName, "Section 'file' is missed");
}
var modelContent = provider.Contents.FirstOrDefault(n => n.Headers.ContentDisposition.Name.Equals("model"));
if (modelContent == null)
{
bindingContext.ModelState.AddModelError(bindingContext.ModelName, "Section 'model' is missed");
}
if (fileContent != null && modelContent != null)
{
model = JsonConvert.DeserializeObject<Tenant>(await modelContent.ReadAsStringAsync());
//model.Text = "<NativeTranslation>";
model.ContentType = provider.Contents[0].Headers.ContentType.MediaType;
model.CertificateFile = await fileContent.ReadAsByteArrayAsync();
//model.TenantId = fileContent.Headers.ContentDisposition.FileName;
}
}
return model;
});
task.Wait();
bindingContext.Model = task.Result;
return true;
}
}
public bool BindModel(HttpActionContext actionContext,ModelBindingContext bindingContext)
{
if(bindingContext.ModelType!=typeof(租户))
{
返回false;
}
var task=task.Run(异步()=>
{
var model=新租户();
如果(!actionContext.Request.Content.IsMimeMultipartContent())
{
bindingContext.ModelState.AddModelError(bindingContext.ModelName,“WebRequeest内容‘多部分/表单数据’有效”);
}
其他的
{
var provider=await actionContext.Request.Content.ReadAsMultipartAsync();
var fileContent=provider.Contents.FirstOrDefault(n=>n.Headers.ContentDisposition.Name.Equals(“文件”);
if(fileContent==null)
{
bindingContext.ModelState.AddModelError(bindingContext.ModelName,“缺少“文件”部分”);
}
var modelContent=provider.Contents.FirstOrDefault(n=>n.Headers.ContentDisposition.Name.Equals(“模型”);
if(modelContent==null)
{
bindingContext.ModelState.AddModelError(bindingContext.ModelName,“缺少“模型”部分”);
}
if(fileContent!=null&&modelContent!=null)
{
model=JsonConvert.DeserializeObject(等待modelContent.ReadAsStringAsync());
//model.Text=“”;
model.ContentType=provider.Contents[0]。Headers.ContentType.MediaType;
model.CertificateFile=await fileContent.ReadAsByteArrayAsync();
//model.TenantId=fileContent.Headers.ContentDisposition.FileName;
}
}
收益模型;
});
task.Wait();
bindingContext.Model=task.Result;
返回true;
}
}
但filecontent为null,model也为null
更新1:
我没想到会出现这种情况,但在检查
ContentDispositionHeader的名称时,似乎必须包含引号
对于文件
,而不是
var fileContent = provider.Contents.FirstOrDefault(n => n.Headers.ContentDisposition.Name.Equals("file"));
一定是
var fileContent = provider.Contents.FirstOrDefault(n => n.Headers.ContentDisposition.Name.Equals(@"""file"""));
var modelContent = provider.Contents.FirstOrDefault(n => n.Headers.ContentDisposition.Name.Equals(@"""model"""));
对于型号
必须
var fileContent = provider.Contents.FirstOrDefault(n => n.Headers.ContentDisposition.Name.Equals(@"""file"""));
var modelContent = provider.Contents.FirstOrDefault(n => n.Headers.ContentDisposition.Name.Equals(@"""model"""));
如果您通过provider.Contents[0].Headers.ContentDisposition检查Visual Studio即时窗口中的文件
(可能是索引[1]),您将看到以下输出。
请注意DispositionType:“表单数据”
和名称:“\”文件“
”之间引号的区别,尽管它们都是字符串类型
{form-data; name="file"; filename="upload.txt"}
CreationDate: null
DispositionType: "form-data"
FileName: "\"upload.txt\""
FileNameStar: null
ModificationDate: null
Name: "\"file\""
Parameters: Count = 2
ReadDate: null
Size: null
我还不是React
开发者,所以我无法执行webapi<