WebApi返回各种类型(图片/json数据/字符串)

梦里梦外; 2021-06-26 16:06 555阅读 0赞

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;  
    }
    
    
    
    //返回html页面
    public HttpResponseMessage Get(string id)
            { 
                if (id.Contains("OID="))
                { 
                    id = id.Replace("OID=", "");
                }
                else if (id.Contains("oid="))
                { 
                    id = id.Replace("oid=", "");
                }
                else
                { 
                    id = "Not Found!";
                }
                string html = getHtml(id);
                var result = new HttpResponseMessage(HttpStatusCode.OK)
                { 
                    Content = new StringContent(html, Encoding.UTF8, "text/html")
                };
                return result;
            }