C#webapi接收app发送的post请求，包括数据和图片
【1】HttpContext获取http请求
HttpContext context = HttpContext.Current;
在业务层需要取得当前页面层的Session，Request，Response，Server时可以通过 Http.Current来获得
参考https://www.cnblogs.com/zhouyunbaosujina/p/3164956.html
【2】 判断当前页面是否接收到了Post请求
context.Request.HttpMethod.ToLower().Equals("post")
【3】当前页面获取到的参数和参数值
参考https://q.cnblogs.com/q/108321/
context.Request.Form.AllKeys
foreach (var key in context.Request.Form.AllKeys)
{
var val=context.Request.Form[key];
}
比如参数名Unit，对应参数值就是
context.Request.Form["Unit"]
【4】获取上传的图片，以文件流的形式传过来
context.Request.Form["base64Code1"]
上传多个文件的情况下，用逗号" , "分割文件（备注，多个文件时上传多个文件流参数时遇到问题，获取不到完整的post请求，即只能获取部分参数，故改成只上传一个文件流参数，然后分割开）
var base64Code = context.Request.Form["base64Code1"].Split(',');
【5】文件路径
Server.MapPath方法作用
MapPath方法用来返回与Web服务器上的指定虚拟路径相对应的物理文件路径。
语法
Server.MapPath(path);
参数
path表示Web服务器上的虚拟路径，如果path值为空，则该方法返回包含当前应用程序的完整物理路径。
注意事项
Server.MapPath()有时在程序调试时会提示“当前上下文中不存在名称“Server””错误，从而不支持函数Server.MapPath()的使用。尽管引用了命名空间“using System.Web;”也是无济于事，此时就需要使用其全名，或者是当前使用Server.MapPath()函数的类继承自System.Web.UI.Page。
参考https://blog.csdn.net/nnn_net/article/details/71080905
（1）配置文件里的路径信息
string PicPath = System.Configuration.ConfigurationManager.AppSettings["PicPath"];
（2）生成新的文件名
string fileExt = "jpg"; //文件扩展名，不含“.”
string newFileName = GetTimeStamp() + "_"+(i+1)+"." + fileExt; //随机生成新的文件名
GetTimeStamp是获取时间戳的方法
（3）文件路径，如果不存在，就去创建
string path = "\\";
string pathY = System.Web.HttpContext.Current.Server.MapPath(path + "UploadImg\\avatars\\yt\\");
if (!Directory.Exists(pathY))
{
Directory.CreateDirectory(pathY);
}
（4）保存图片路径--绝对路径
string newFilePath = System.Web.HttpContext.Current.Server.MapPath(path + "UploadImg\\avatars\\yt\\" + newFileName);
【6】上传图片
string str = base64Code[i];
if (str != null)加上 && str!=""空的判断
Image img = Base64ToImg(str);//添加引用Image--using System.Drawing;
img.Save(newFilePath, System.Drawing.Imaging.ImageFormat.Png);
string ypath = PicPath + "UploadImg/avatars/yt/" + newFileName;
解析base64编码获取图片的方法Base64ToImg
MemoryStream----http://www.cnblogs.com/JimmyZheng/archive/2012/04/14/2446507.html#u02
【7】//保存缩略图
/*if (img1.Height > 0 && img1.Width > 0)
{
Image thumbimg = img1.GetThumbnailImage(Convert.ToInt32(img1.Width * 0.4), Convert.ToInt32(img1.Height * 0.4), null, IntPtr.Zero);
thumbimg.Save(newThumbnailPath);
}*/
【8】附代码如下
[HttpPost, Route("Uploadinf")]
public PostResult Uploadinf()
{
HttpContext context = HttpContext.Current;
string param = string.Empty;
if (context.Request.HttpMethod.ToLower().Equals("post"))
{
param += "[POST]";
}
foreach (var key in context.Request.Form.AllKeys)
{
param += key + ":" + context.Request.Form[key];
}
//for(int i=0; i
// param += context.Request.Form[i] + ":" + context.Request.Form[i];
//}
PostResult result = new PostResult();
T_DATA_PE tp = new T_DATA_PE();
tp.Unit = int.Parse(context.Request.Form["Unit"]);
tp.style = int.Parse(context.Request.Form["style"]);
tp.community = int.Parse(context.Request.Form["community"]);
tp.address = context.Request.Form["address"];
tp.monitortime = Convert.ToDateTime(context.Request.Form["monitortime"]);
tp.description = context.Request.Form["description"];
tp.status = 0;
try
{
System.Web.Mvc.Controller controller = new HomeController();
#region 上传图片
string path = "\\";// context.Request.Form["path"]
//string base64Code1 = context.Request.Form["base64Code1"];
//string base64Code2 = context.Request.Form["base64Code2"];
//string base64Code3 = context.Request.Form["base64Code3"];
//用“,”分割文件流
var base64Code = context.Request.Form["base64Code1"].Split(',');
for (var i = 0; i < base64Code.Length; i++)
{
string str = base64Code[i];
string PicPath = System.Configuration.ConfigurationManager.AppSettings["PicPath"];
string fileExt = "jpg"; //文件扩展名，不含“.”
string newFileName = GetTimeStamp() + "_"+(i+1)+"." + fileExt; //随机生成新的文件名
string pathY = System.Web.HttpContext.Current.Server.MapPath(path + "UploadImg\\avatars\\yt\\");
if (!Directory.Exists(pathY))
{
Directory.CreateDirectory(pathY);
}
//保存图片路径--绝对路径
string newFilePath = System.Web.HttpContext.Current.Server.MapPath(path + "UploadImg\\avatars\\yt\\" + newFileName);
//判断一下是否上传了图片
if (str != null)
{
Image img = Base64ToImg(str);//Image--using System.Drawing;
img.Save(newFilePath, System.Drawing.Imaging.ImageFormat.Png);
string ypath = PicPath + "UploadImg/avatars/yt/" + newFileName;
if (i == 0)
{
tp.image1 = ypath;
}
else if (i == 1)
{
tp.image2 = ypath;
}
else if (i == 2)
{
tp.image3 = ypath;
}
}
}
/*string PicPath = System.Configuration.ConfigurationManager.AppSettings["PicPath"];
string fileExt = "jpg"; //文件扩展名，不含“.”
string newFileName1 = GetTimeStamp() + "_1." + fileExt; //随机生成新的文件名*/
//string newFileName2 = GetTimeStamp() + "_2." + fileExt; //随机生成新的文件名
//string newFileName3 = GetTimeStamp() + "_3." + fileExt; //随机生成新的文件名
//string newThumbnailFileName = "thumb_" + newFileName; //随机生成缩略图文件名
/*string upLoadPath1 = "\\UploadImg\\avatars\\yt\\" + newFileName1;//上传原图目录相对路径*/
//string upLoadPath2 = "\\UploadImg\\avatars\\yt\\" + newFileName2;
//string upLoadPath3 = "\\UploadImg\\avatars\\yt\\" + newFileName3;
//string upLoadPathS = "\\UploadImg\\avatars\\slt\\" + newThumbnailFileName;//上传缩略图目录相对路径
//是否存在存放缩略图和原图的文件夹 没有则创建
//string pathS = System.Web.HttpContext.Current.Server.MapPath(path + "UploadImg\\avatars\\slt\\");
/*string pathY = System.Web.HttpContext.Current.Server.MapPath(path + "UploadImg\\avatars\\yt\\");*/
/*if (!Directory.Exists(pathS))
{
Directory.CreateDirectory(pathS);
}*/
/*if (!Directory.Exists(pathY))
{
Directory.CreateDirectory(pathY);
}*/
//string newFilePath = path + "UploadImg\\avatars\\yt\\" + newFileName; //上传后原图的路径
//string newThumbnailPath = path + "UploadImg\\avatars\\slt\\" + newThumbnailFileName; //上传后的缩略图路径
//保存图片路径--绝对路径
/*string newFilePath1 = System.Web.HttpContext.Current.Server.MapPath(path + "UploadImg\\avatars\\yt\\" + newFileName1);*/
//string newFilePath2 = System.Web.HttpContext.Current.Server.MapPath(path + "UploadImg\\avatars\\yt\\" + newFileName2);
//string newFilePath3 = System.Web.HttpContext.Current.Server.MapPath(path + "UploadImg\\avatars\\yt\\" + newFileName3);
//string newThumbnailPath = System.Web.HttpContext.Current.Server.MapPath(path + "UploadImg\\avatars\\slt\\" + newThumbnailFileName);
#region 检查上传的物理路径是否存在，不存在则创建
//if (!Directory.Exists(path))
//{
// Directory.CreateDirectory(path);
//}
#endregion
#region 保存文件 图片剪裁
//判断一下是否上传了图片
/*if (base64Code1 != null)
{
Image img1 = Base64ToImg(base64Code1);//Image--using System.Drawing;
img1.Save(newFilePath1, System.Drawing.Imaging.ImageFormat.Png);
string ypath1 = PicPath + "UploadImg/avatars/yt/" + newFileName1;
tp.image1 = ypath1;
}*/
/*if (base64Code2 != null)
{
Image img2 = Base64ToImg(base64Code2);//Image--using System.Drawing;
img2.Save(newFilePath2, System.Drawing.Imaging.ImageFormat.Png);
string ypath2 = PicPath + "UploadImg/avatars/yt/" + newFileName2;
tp.image2 = ypath2;
}
if (base64Code1 != null)
{
Image img3 = Base64ToImg(base64Code3);//Image--using System.Drawing;
img3.Save(newFilePath3, System.Drawing.Imaging.ImageFormat.Png);
string ypath3 = PicPath + "UploadImg/avatars/yt/" + newFileName3;
tp.image3 = ypath3;
}*/
//保存缩略图
/*if (img1.Height > 0 && img1.Width > 0)
{
Image thumbimg = img1.GetThumbnailImage(Convert.ToInt32(img1.Width * 0.4), Convert.ToInt32(img1.Height * 0.4), null, IntPtr.Zero);
thumbimg.Save(newThumbnailPath);
}*/
#endregion
//string spath = PicPath + "UploadImg/avatars/slt/" + newThumbnailFileName;
#endregion
List
list.Add(tp);
int addresult = ef.Insert
if (addresult > 0)
{
T_DATA_PE temp = ef.FindAll
result.flag = true;
result.msg = "发布成功";
result.postid = temp.image1.ToString()+" ; "+temp.image2.ToString() + " ; "+temp.image3.ToString() + " ; ";
}
else
{
result.flag = false;
result.msg = "发布失败";
result.postid = "";
}
}
catch (Exception e)
{
result.flag = false;
result.msg = "接口异常:" + e.ToString();
result.postid = "";
}
return result;
}
//获取当前时间段额时间戳
public string GetTimeStamp()
{
TimeSpan ts = DateTime.UtcNow - new DateTime(1970, 1, 1, 0, 0, 0, 0);
return Convert.ToInt64(ts.TotalMilliseconds).ToString();
}
///
/// 解析base64编码获取图片
///
///
///
private Bitmap Base64ToImg(string base64Code)
{
MemoryStream stream = new MemoryStream(Convert.FromBase64String(base64Code));
return new Bitmap(stream);
}