c# - 无法在 Image 类中找到 FromStream

Question

我有以下代码：

Image tmpimg = null;
HttpWebRequest httpWebRequest = (HttpWebRequest)HttpWebRequest.Create(url);
HttpWebResponse httpWebReponse = (HttpWebResponse)httpWebRequest.GetResponse();
Stream stream = httpWebReponse.GetResponseStream();
return Image.FromStream(stream);

在我输入时的最后一行Image.，FromStream不在列表中。我能做些什么？

Answer 1

更详细的使用示例和所需的命名空间。

using System.Net;
using System.IO;
using System.Drawing;

public static Image GetImageFromUrl(string url)
    {
        HttpWebRequest httpWebRequest = (HttpWebRequest)HttpWebRequest.Create(url);
        
            using (HttpWebResponse httpWebReponse = (HttpWebResponse)httpWebRequest.GetResponse())
            {
                using (Stream stream = httpWebReponse.GetResponseStream())
                {
                    return Image.FromStream(stream);
                }
            }
    }

Answer 2

试试这个：

    using System.Drawing;
    using System.IO;
    using System.Net;

    public static Image GetImageFromUrl(string url)
    {
        using (var webClient = new WebClient())
        {
            return ByteArrayToImage(webClient.DownloadData(url));
        }
    }

    public static Image ByteArrayToImage(byte[] fileBytes)
    {
        using (var stream = new MemoryStream(fileBytes))
        {
            return Image.FromStream(stream);
        }
    }

Answer 3

你可能需要using System.Drawing;.

Answer 4

顺便说一句，您还需要添加对 System.Drawing.dll 的引用，仅添加 using System.Drawing 是不够的。