c# 【MVC】WebApi返回各种类型(图片/json数据/字符串)

 

using System.IO;

/// <summary>
/// WebApi返回图片 /// </summary> public HttpResponseMessage GetQrCode() { var imgPath = @"D:\ITdosCom\Images\itdos.jpg"; //从图片中读取byte var imgByte = File.ReadAllBytes(imgPath); //从图片中读取流 var imgStream = new MemoryStream(File.ReadAllBytes(imgPath)); var resp = new HttpResponseMessage(HttpStatusCode.OK) { Content = new ByteArrayContent(imgByte) //或者 //Content = new StreamContent(stream) }; resp.Content.Headers.ContentType = new MediaTypeHeaderValue("image/jpg"); return resp; } /// <summary> /// WebApi返回json数据 /// </summary> public HttpResponseMessage GetQrCode() { var jsonStr = "{\"IsSuccess\":true,\"Data\":\"www.itdos.com\"}"; var result = new HttpResponseMessage(HttpStatusCode.OK) { Content = new StringContent(jsonStr, Encoding.UTF8, "text/json") }; return result; } /// <summary> /// WebApi返回字符串 /// </summary> public HttpResponseMessage GetQrCode() { var str = "IT大师www.itdos.com"; var result = new HttpResponseMessage(HttpStatusCode.OK) { Content = new StringContent(str, Encoding.UTF8, "text/plain") }; return result; }