从FilePathResult ASP.net MVC发送的http响应中将二进制图像数据转换为base64字符串

public ActionResult GetImage()
{
    string imagePath = "path_to_image_file.jpg";
    return new FilePathResult(imagePath, "image/jpeg");
}

public byte[] GetImageData()
{
    ActionResult result = GetImage();
    MemoryStream memoryStream = new MemoryStream();
    result.ExecuteResult(new ControllerContext(), memoryStream);
    byte[] imageData = memoryStream.ToArray();
    return imageData;
}

public string ConvertToBase64(byte[] imageData)
{
    string base64String = Convert.ToBase64String(imageData);
    return base64String;
}

public ActionResult GetImage()
{
    string imagePath = "path_to_image_file.jpg";
    return new FilePathResult(imagePath, "image/jpeg");
}

public byte[] GetImageData()
{
    ActionResult result = GetImage();
    MemoryStream memoryStream = new MemoryStream();
    result.ExecuteResult(new ControllerContext(), memoryStream);
    byte[] imageData = memoryStream.ToArray();
    return imageData;
}

public string ConvertToBase64(byte[] imageData)
{
    string base64String = Convert.ToBase64String(imageData);
    return base64String;
}

// 调用示例
byte[] imageData = GetImageData();
string base64String = ConvertToBase64(imageData);