如何使用ASP.NET中的Web服务将图像保存在pc文件夹中？错误：GDI +中的通用错误

I am working in an application that saves images via web service in asp.net but it throws an exception with the following message:

我正在一个应用程序,通过asp.net中的Web服务保存图像,但它引发了以下消息的异常:

Generic Error in GDI+

GDI +中的一般错误

These are the methods:

这些是方法:

public class GuardaImagenes : System.Web.Services.WebService
{

    [WebMethod]
    public string GuardarImagen(string image,string imageTitle,string ext)
    {
        string ImageFolderPath = @"C:\Users\Andres\Pictures\ImagenesEvento\";
        Image convertedImage = ConvertToImage(image);
        try {
            convertedImage.Save(ImageFolderPath+imageTitle+ext,ImageFormat.Jpeg);
            return "true";
        }catch(Exception ex){
            return "false";
        }            
    }

    public Image ConvertToImage(string image) {
        // Convert Base64 String to byte[]
        byte[] imageBytes = Convert.FromBase64String(image);
        using (var ms = new MemoryStream(imageBytes, 0,imageBytes.Length))
        {
            // Convert byte[] to Image
            ms.Write(imageBytes, 0, imageBytes.Length);
            Image img = Image.FromStream(ms, true);
            return img;
        }
    }        
}

I pass the image in Base64 string and use the ConvertToImage method to save the image in the specified folder in my computer.

我在Base64字符串中传递图像并使用ConvertToImage方法将图像保存在计算机的指定文件夹中。

The problem is, when it comes when I want to save the image, the program crashes and can't handle it. I've read that it's better to use MemoryStream, but I can't implement it correctly.

问题是,当我想保存图像时,程序崩溃并无法处理。我已经读过使用MemoryStream更好,但我无法正确实现它。

2 个解决方案

#1

The error occurs because the memory stream is closed. You can refer to this

发生错误是因为内存流已关闭。你可以参考这个

public Image ConvertToImage(string image)
        {
            // Convert Base64 String to byte[]
            byte[] imageBytes = Convert.FromBase64String(image);
            var ms = new MemoryStream(imageBytes, 0, imageBytes.Length);

            // Convert byte[] to Image
            ms.Write(imageBytes, 0, imageBytes.Length);
            Image img = Image.FromStream(ms, true);
            return img;

        }

#2

I have found the solution to this problem, what it is only needed is to write all the image bytes using the class

我找到了解决这个问题的方法,只需要使用该类写入所有图像字节

File

This is my final code:

这是我的最终代码:

[WebMethod]
    public string SaveEventImage(string ImageByteArray, string ImageTitle)
    {
        try
        {
            byte[] bytes = Convert.FromBase64String(ImageByteArray);
            File.WriteAllBytes(EVTImagePath + ImageTitle + ".jpg",bytes);

            return "true";
        }
        catch
        {
            return "false";
        }
    }

#1