/// <summary>
/// 根据当前日期，指定跟目录和文件扩展名获取一个完整的存储路径和名称
/// </summary>
/// <param name="path"></param>
/// <param name="name">文件名称，为null时使用随机文件名</param>
/// <param name="extension">文件扩展名</param>
/// <returns></returns>
public static string AppendFileNameByDate(this string path, string name, string extension)
{
if (string.IsNullOrEmpty(extension))
{
throw new ArgumentNullException(nameof(extension));
}
if (extension.StartsWith("."))
{
extension = extension.TrimStart('.');
}
path = path.AppendFileDirectoryByDate();
if (string.IsNullOrWhiteSpace(name))
{
name = RandomCode.GetDtString(6);
}
StringBuilder fileName = new StringBuilder(path);
fileName.AppendFormat("/{0}/{1}.{2}", path, name, extension);
return(fileName.ToString());
}
/// <summary>
/// 由上传路径、文件名及扩展名，构造一个完整的存储路径和名称
/// </summary>
/// <param name="path">上传路径</param>
/// <param name="name">文件名</param>
/// <param name="extension">扩展名</param>
/// <returns></returns>
public static string GetFileName(this string path, string name, string extension)
{
if (string.IsNullOrWhiteSpace(path))
{
path = path.AppendFileDirectoryByDate();
}
if (path.StartsWith("/"))
{
path = path.TrimStart('/'); //移除头部"/"字符
}
if (path.EndsWith("/"))
{
path = path.TrimEnd('/'); //移除尾部"/"字符
}
if (string.IsNullOrWhiteSpace(name))
{
name = RandomCode.GetTimeString(6);
}
if (extension.StartsWith("."))
{
extension = extension.TrimStart('.');
}
return(string.Format("/{0}/{1}.{2}", path, name, extension));
}
/// <summary>
/// 文件上传
/// </summary>
/// <param name="file"><seealso cref="IFormFile"/>文件</param>
/// <param name="savepath">上传目录</param>
/// <param name="fixedpath">是否固定存储在指定的savepath目录下，为false时在savepath目录后添加日期目录</param>
/// <param name="name">保存文件名（不含扩展名）</param>
/// <param name="beOverride">文件存在时是否覆盖</param>
/// <returns></returns>
public static UploadResult Save(this IFormFile file, string savepath, bool fixedpath, string name, bool beOverride = false)
{
var result = new UploadResult();
if (null == file)
{
result.Message = "没有可上传的内容";
return(result);
}
if (file.Length > Configs.UploadOptions.LimitSize * 1024)
{
result.Message = string.Format("上传的文件不能超过{0}KB", Configs.UploadOptions.LimitSize);
return(result);
}
//标识字段名
result.FieldName = file.GetFieldName();
//文件名
string fileName = file.FileName;
if (string.IsNullOrWhiteSpace(name))
{
name = RandomCode.GetDtString(3);
}
else
{
name = name.Split(new[] { '.' }, StringSplitOptions.RemoveEmptyEntries)[0];
}
//扩展名
string extension = Path.GetExtension(file.FileName);
//固定在指定的上传目录
if (fixedpath)
{
if (string.IsNullOrWhiteSpace(savepath))
{
savepath = Configs.UploadOptions.SaveRoot;
}
}
//非固定指定上传目录时，在上传目录中加入时期目录层
else
{
savepath = savepath.AppendFileDirectoryByDate();
}
//文件保存后文件全名（如：/upload/2016/12/10/231.jpg）
var absFileName = savepath.GetFileName(name, extension);
//新上传后的存储路径（如：D:\\upload\\2016\\12\\10\\45341.jpg）
var rawFilePath = Path.Combine(Configs.UploadOptions.PhysicalUploadRoot, absFileName.TrimStart('/').Replace("/", "\\"));
if (File.Exists(rawFilePath))
{
if (beOverride)
{
File.Delete(rawFilePath);
}
else
{
GetLastVersionFile(absFileName, 1, false, out absFileName, out rawFilePath);
}
}
//物理目录
var rawDirectory = Path.GetDirectoryName(rawFilePath);
try
{
if (!Directory.Exists(rawDirectory))
{
Directory.CreateDirectory(rawDirectory);
}
}
catch
{
result.Message = "创建目录失败";
return(result);
}
try
{
using (FileStream fs = File.Create(rawFilePath))
{
file.CopyToAsync(fs).Wait();
}
result.FilePath = absFileName;
}
catch
{
result.Message = "文件存储失败";
}
return(result);
}