大家好，又见面了，我是你们的朋友全栈君。
.netcore文件上传Api接口，和正常的webForm提交类似，只是用postman测试接口时，记得给form表单命名，否则获取上传文件数量一直为0
后端代码
using System; using System.Collections.Generic; using System.IO; using System.Linq; using System.Threading.Tasks; using Microsoft.AspNetCore.Http; using Microsoft.AspNetCore.Mvc; using MyApiCommon; namespace MyApi.Controllers { [Route("api/[controller]")] [ApiController] public class FileController : ControllerBase { [HttpPost] [Route("postfile")] public string UploadAsync() { try { var files = HttpContext.Request.Form.Files; if (files.Count < 0) return "请上传文件"; long fileSize = files.Sum(f => f.Length) / 1024;//由字节转为kb Stream fs = files[0].OpenReadStream();//将文件转为流 return Base64Convert.FileToBase64(fs); } catch (Exception ex) { return ex.Message; } } } }
using System; using System.Collections.Generic; using System.IO; using System.Text; namespace MyApiCommon { public class Base64Convert { /// <summary> /// 文件转换成Base64字符串 /// </summary> /// <param name="fs">文件流</param> /// <returns></returns> public static String FileToBase64(Stream fs) { string strRet = null; try { if (fs == null) return null; byte[] bt = new byte[fs.Length]; fs.Read(bt, 0, bt.Length); strRet = Convert.ToBase64String(bt); fs.Close(); } catch (Exception ex) { throw ex; } return strRet; } /// <summary> /// Base64字符串转换成文件 /// </summary> /// <param name="strInput">base64字符串</param> /// <param name="fileName">保存文件的绝对路径</param> /// <returns></returns> public static bool Base64ToFileAndSave(string strInput, string fileName) { bool bTrue = false; try { byte[] buffer = Convert.FromBase64String(strInput); FileStream fs = new FileStream(fileName, FileMode.CreateNew); fs.Write(buffer, 0, buffer.Length); fs.Close(); bTrue = true; } catch (Exception ex) { throw ex; } return bTrue; } } }
使用postman测试上传
转载于:https://www.cnblogs.com/personblog/p/10963594.html
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