使用 react 和 ASP.NET Core 从 Active Directory 获取数据

Question

有人可以分享代码来检索用户详细信息以及根据SamAccountName 的输入显示的缩略图吗？

这必须使用 ASP.NET Core 和 react 来完成。我对这些技术很陌生，请帮忙。

我的试验如下

控制器代码：

public Image ourTeam()
    {
        var userDetails = db.users.Where(x=>x.saMAccountName == "someUsername").FirstOrDefault();

        Image image = GetImage(userDetails.CN); //I get image data
        //context.Response.ContentType = "image/jpeg";

        var stream = new System.IO.MemoryStream();

        if (image != null)
            image.Save(stream, ImageFormat.Jpeg);

        return image;
    }

组件代码：

import * as React from 'react';

import { RouteComponentProps } from 'react-router';

interface FetchImageDataState {
imageList: ImageData[];
loading: boolean;
}

export class OurTeam extends React.Component<RouteComponentProps<{}>, FetchImageDataState> {
constructor() {
    super();
    this.state = { imageList: [], loading: true }; //initialize to default

    fetch('api/Home/ourTeam')
        .then(response => response.json() as Promise<ImageData[]>)
        .then(data => {
            this.setState({ imageList: data, loading: false });
        });
}

    public render() {

    let contents = this.state.loading
        ? <p><em>Loading...</em></p>
        : this.renderImageTable(this.state.imageList);
    return <div>
        <h1>Team</h1>


        {contents}
    </div>;
}

private renderImageTable(imageList: ImageData[]) {
    return <div className='table'>{
        imageList.map(x =>
            <img src={x.byteData} alt={x.CN} />)
    }</div>;


}
}

export class ImageData {
CN: string = "";
byteData: string = "";
}

PFB 关于我如何验证然后检索图像的代码：

private Image GetImage(string cn)
    {
        string LDAP_PATH = "LDAP://" + "SOMEPATH.com";
        string user = "USERID";
        string password = "PASSWORD";
                    using (DirectoryEntry entry = new DirectoryEntry(LDAP_PATH, user, password))
        {
            {
                DirectorySearcher search = new DirectorySearcher(entry);
                search.PropertiesToLoad.Add("sAMAccountName");
                search.PropertiesToLoad.Add("distinguishedName");
                search.Filter = "(&(objectClass=user)(sAMAccountName=" + cn + "))";
                SearchResult result = search.FindOne();
                if (result == null)
                {
                    search.Filter = "(&(objectClass=user)(cn=" + cn + "))";
                    result = search.FindOne();
                }

                if (result != null)
                {
                    DirectoryEntry entryUser = result.GetDirectoryEntry();
                    string propertyName = "thumbnailPhoto";
                    if (entryUser.Properties.Contains(propertyName))
                    {
                        byte[] img = entryUser.Properties[propertyName].Value as byte[];
                        MemoryStream memStream = new MemoryStream(img);
                        return Image.FromStream(memStream);
                    }
                }
            }
        }

        // User not authenticated
        return null;
    }

Answer 1

我假设您想要返回图像，就像您只是在下载文件一样。

首先，从GetImage 返回一个byte[]。通过将其转换为 Image 对象，您不会在这里获得任何东西。如果您需要在代码中编辑图像，那将是有意义的。不过既然你不是，那也没关系。

所以改变这个：

byte[] img = entryUser.Properties[propertyName].Value as byte[];
MemoryStream memStream = new MemoryStream(img);
return Image.FromStream(memStream);

到这里：

return entryUser.Properties[propertyName].Value as byte[];

然后在你的控制器中，返回一个FileContentResult，像这样：

public ActionResult ourTeam()
{
    var userDetails = db.users.Where(x=>x.saMAccountName == "someUsername").FirstOrDefault();

    byte[] image = GetImage(userDetails.CN);

    return File(image, "image/jpeg");
}