以下方法均是個人，僅供參考
public interface IFileHelper
{
/// <summary>
/// 保存文件 (返回 Test.jpg) 出錯就返回 error|錯誤信息
/// </summary>
string SaveFile(IFormFile file, FileCategory fc);
bool DeleteFile(string fileName, FileCategory fc);
}
public class FileHelper: IFileHelper
{
private readonly IHostingEnvironment _hostingEnv;
private static readonly Random _rdm = new Random();
public FileHelper(IHostingEnvironment env)
{
_hostingEnv = env;
}
/// <summary>
/// 保存文件(返回新文件名)
/// </summary>
/// <param name="file"></param>
/// <param name="fc"></param>
/// <returns></returns>
public string SaveFile(IFormFile file, FileCategory fc)
{
var path = GetUploadPath(fc);
var targetDirectory = Path.Combine(_hostingEnv.WebRootPath, string.Format(path));
//這裡進行隨機文件名
var fileName = GetRandName(file);
var savePath = Path.Combine(targetDirectory, fileName);
try
{
file.CopyTo(new FileStream(savePath, FileMode.Create));
//return Upload/NewsPhoto/Test.jpg
//返回文件名
return fileName;
}
catch
{
return "false";
}
}
/// <summary>
/// 刪除文件
/// </summary>
/// <param name="fullPath"></param>
/// <returns></returns>
public bool DeleteFile(string fileName, FileCategory fc)
{
var path = GetUploadPath(fc);
var targetDirectory = Path.Combine(_hostingEnv.WebRootPath, string.Format(path));
//物理完整路徑
var physicalPath = Path.Combine(targetDirectory, fileName);
try
{
File.Delete(physicalPath);
return true;
}
catch
{
return false;
}
}
/// <summary>
/// 相對路徑 /Upload/NewsPhoto/Test.jpg
/// </summary>
/// <param name="path"></param>
/// <returns></returns>
public static string GetFullPath(FileCategory fc,string fileName)
{
var path = GetUploadPath(fc);
return Path.Combine(string.Format(path), fileName);
}
/// <summary>
/// 獲取到上傳路徑（Upload//CasePhoto//）
/// </summary>
/// <param name="fc"></param>
/// <returns></returns>
public static string GetUploadPath(FileCategory fc)
{
switch (fc)
{
case FileCategory.CasePhoto:return "Upload//CasePhoto//";
case FileCategory.NewsPhoto:return "Upload//NewsPhoto//";
case FileCategory.CompanyPhoto: return "Upload//CompanyPhoto//";
case FileCategory.PositionPhoto: return "Upload//PositionPhoto//";
case FileCategory.Partner: return "Upload//Partner//";
default:return "";
}
}
public static string GetRandName(string oldFileName)
{
//獲取後綴
var extension= GetExtensionWithDot(oldFileName);
//產生新的文件名
var newFileName = DateTime.Now.ToFileTime().ToString() + _rdm.Next(999);
//組合
return newFileName + extension;
}
public static string GetRandName(IFormFile file)
{
var fileName = file.FileName;
var randName = GetRandName(fileName);
return randName;
}
public enum FileCategory
{
/// <summary>
/// 案例文章插圖
/// </summary>
CasePhoto,
/// <summary>
/// 新聞文章插圖
/// </summary>
NewsPhoto,
/// <summary>
/// 公司介紹插圖
/// </summary>
CompanyPhoto,
/// <summary>
/// 職位描述插圖
/// </summary>
PositionPhoto,
/// <summary>
/// 合作伙伴
/// </summary>
Partner,
}
/// <summary>
/// 獲取到後綴名的方法
/// </summary>
public static string GetExtensionWithDot(string fileName)
{
var dotIndex = fileName.LastIndexOf('.');
if (dotIndex < 0 || dotIndex >= fileName.Length) return string.Empty;
return fileName.Substring(dotIndex);
}
}
//添加一個FileHelper的依賴注入（依賴注入的實現類一定要寫構造方法）
//該方法是單例模式
public void ConfigureServices(IServiceCollection services)
{
services.AddSingleton<IFileHelper, FileHelper>();
}
在startup中加入
新建一個UploadController 專門處理上傳
public class UploadController : Controller
{
private readonly IFileHelper _fileHelper;
public UploadController(IFileHelper fileHelper)
{
_fileHelper = fileHelper;
}
/// <summary>
/// 專門為Case的文件上傳 有可能有兩個name 不支持H5 wangEditorFormFile 支持h5 wangEditorH5File
/// </summary>
/// <returns></returns>
[HttpPost]
public string UploadCompanyPhoto(IFormFile wangEditorFormFile = null, IFormFile wangEditorH5File = null)
{
//全部用/，windows支持/
return Upload(FileCategory.CompanyPhoto, wangEditorFormFile, wangEditorH5File);
}
private string Upload(FileCategory fc ,IFormFile wangEditorFormFile = null, IFormFile wangEditorH5File = null)
{
if (wangEditorFormFile == null && wangEditorH5File == null)
{
return "error|無文件上傳";
}
var file = wangEditorFormFile == null ? wangEditorH5File : wangEditorFormFile;
var result = _fileHelper.SaveFile(file, fc);
//判斷是否錯誤
if (result == "false")
{
return "error|上傳失敗";
}
else
{
return "http://" + Request.Host.ToString() + "/" + FileHelper.GetFullPath(fc, result); ;
}
}
}
以上方法僅供參考
