[C#] 网站图片上传

先建立前端传值到后端需要承接的资料类别

public class ImageDataModel{    /// <summary>图片名称</summary>    public string Name { get; set; }    /// <summary>大小</summary>    public long Size { get; set; }    /// <summary>副档名</summary>    public string Type { get; set; }    /// <summary>宽</summary>    public int Width { get; set; }    /// <summary>高</summary>    public int Height { get; set; }    /// <summary>base64图档资料</summary>    public string Data { get; set; }    public bool CheckData(int LimitWidth, int LimitHeight)    {        if (!Regex.IsMatch(Type.ToString(), "^image/(png|jpeg|jpg)$"))        {            Message = "图片格式错误";            return false;        }        if (Width < LimitWidth || Height < LimitHeight ||            Width % LimitWidth != 0 || Height % LimitHeight != 0 || Width / LimitWidth != Height / LimitHeight)        {            Message = $"图片尺寸比例必须为{LimitWidth}px*{LimitHeight}px";            return false;        }        if (Size > Width * Height * 8)        {            Message = "图片大小错误";            return false;        }        if (Size > 1048576) //1024*1024 = 1MB        {            Message = "图片不得大于1MB";            return false;        }        return true;    }}

再来在后端建立图片上传的方法类别

public class UplaodFile{    /// <summary>图片上传</summary>    /// <param name="Path">路径</param>    /// <param name="FileData">base64的字串</param>    /// <returns>上传是否成功</returns>    public bool UploadImg(string Path, string FileData)    {        try        {            byte[] byteimg = Convert.FromBase64String(FileData);            using (FileStream MyFile = new FileStream(Path, FileMode.Create, FileAccess.ReadWrite, FileShare.ReadWrite))            {                MyFile.Write(byteimg, 0, byteimg.Length);                MyFile.Flush();            }        }        catch (Exception e)        {            return false;        }        return true;    }}

后端使用方式

public ActionResult UploadImage(ImageDataModel Image){    UplaodFile file = new UplaodFile();    string backPath = System.Web.Hosting.HostingEnvironment.MapPath("/Upload");    backPath += "\\Image";    Directory.CreateDirectory(backPath);    if (Image != null)    {        string fullName = $"{Guid.NewGuid().ToString()}.{Image.Type.Split('/')[1]}";        file.UploadImg($"{backPath}\\{fullName}", Image.Data.Split(',')[1]);    }    return Json(new { Status = "SUCCESSFUL" });}