WinForm POST上传与后台接收

ca197,如履薄冰txt,腾讯面试

前端

---

 

using system;
using system.collections.generic;
using system.componentmodel;
using system.data;
using system.drawing;
using system.linq;
using system.text;
using system.windows.forms;
using system.net;
using system.io;
using system.collections.specialized;

namespace windowsformsapp1
{
public partial class form1 : form
{
webrequest webrequest = webrequest.create("http://localhost/");
public form1()
{
initializecomponent();
}

private void button1_click(object sender, eventargs e)
{
encoding myencoding = encoding.getencoding("utf-8");
//中文参数 string address = "http://www.jb51.net/?" + httputility.urlencode("参数一", myencoding) + "=" + httputility.urlencode("值一", myencoding);
httpwebrequest req = (httpwebrequest)httpwebrequest.create("http://localhost/winformpost/default.aspx?act=aabbcc");
req.method = "get";
using (webresponse wr = req.getresponse())
{
//在这里对接收到的页面内容进行处理
using (streamreader reader = new streamreader(wr.getresponsestream(),myencoding))
{

string body = reader.readtoend();
reader.close();
messagebox.show(body);
}
}
}

private void button2_click(object sender, eventargs e)
{
//post
string parmer = "act=send&name=abcd";
byte[] bytes = encoding.ascii.getbytes(parmer);
httpwebrequest req = (httpwebrequest)httpwebrequest.create("http://localhost/winformpost/default.aspx");
req.method = "post";
req.contenttype = "application/x-www-form-urlencoded";
req.contentlength = bytes.length;
using (stream reqstream = req.getrequeststream())
{
reqstream.write(bytes, 0, bytes.length);
}
using (webresponse wr = req.getresponse())
{
using (streamreader sr = new streamreader(wr.getresponsestream()))
{
messagebox.show(sr.readtoend());
}
}
}

private void button3_click(object sender, eventargs e)
{
httpwebrequest req = (httpwebrequest)httpwebrequest.create("http://localhost/winformpost/default.aspx");
req.method = "post";
filestream fs = new filestream("d:\\12.jpg", filemode.open, fileaccess.read);
byte[] postdatabyte = new byte[fs.length];
fs.read(postdatabyte, 0, postdatabyte.length);
req.contentlength = postdatabyte.length;
stream stream = req.getrequeststream();
stream.write(postdatabyte, 0, postdatabyte.length);
stream.close();
using (webresponse wr = req.getresponse())
{
using (streamreader sr = new streamreader(wr.getresponsestream()))
{
messagebox.show(sr.readtoend());
}
}
}
private void button4_click(object sender, eventargs e)
{
uploadimage("d:\\常用软件\\数据库\\sql2008full_chs.iso");
}

/// <summary>
/// 通过http上传图片及传参数
/// </summary>
/// <param name="imgpath">图片地址(绝对路径：d:\demo\img\123.jpg)</param>
public void uploadimage(string imgpath)
{
var uploadurl = "http://localhost/winformpost/up.aspx";
dictionary<string, string> dic = new dictionary<string, string>() {
{"p1",1.tostring() },
{"p2",2.tostring() },
{"p3",3.tostring() },
};
var postdata = "p1=1&fname=sql2008full_chs.iso&p3=3";// utils.buildquery(dic);//转换成：para1=1&para2=2&para3=3,后台获取参数将以querystring方式 ，而非 form方式
var posturl = string.format("{0}?{1}", uploadurl, postdata);//拼接url
httpwebrequest request = webrequest.create(posturl) as httpwebrequest;
request.allowautoredirect = true;
request.method = "post";

string boundary = datetime.now.ticks.tostring("x"); // 随机分隔线
request.contenttype = "multipart/form-data;charset=utf-8;boundary=" + boundary;
byte[] itemboundarybytes = encoding.utf8.getbytes("\r\n--" + boundary + "\r\n");
byte[] endboundarybytes = encoding.utf8.getbytes("\r\n--" + boundary + "--\r\n");

int pos = imgpath.lastindexof("\\");
string filename = imgpath.substring(pos + 1);

//请求头部信息
stringbuilder sbheader = new stringbuilder(string.format("content-disposition:form-data;name=\"file\";filename=\"{0}\"\r\ncontent-type:application/octet-stream\r\n\r\n", filename));
byte[] postheaderbytes = encoding.utf8.getbytes(sbheader.tostring());
stream poststream = request.getrequeststream();
using (filestream fs = new filestream(imgpath, filemode.open, fileaccess.read))
{
//发送分隔符
poststream.write(itemboundarybytes, 0, itemboundarybytes.length);
//发送头部信息
poststream.write(postheaderbytes, 0, postheaderbytes.length);
//写文件
byte[] filebytes = new byte[1024];
int filebyteread = 0;
while ((filebyteread =fs.read(filebytes,0,filebytes.length)) !=0 )
{
poststream.write(filebytes, 0, filebyteread);
}
}
//发送分隔符
poststream.write(endboundarybytes, 0, endboundarybytes.length);
poststream.close();

httpwebresponse response = request.getresponse() as httpwebresponse;
//stream instream = response.getresponsestream();
//streamreader sr = new streamreader(instream, encoding.utf8);
//string content = sr.readtoend();
//messagebox.show(content);
using (stream responsestream = response.getresponsestream())
{
using (streamreader mystreamreader = new streamreader(responsestream, encoding.getencoding("utf-8")))
{
string retstring = mystreamreader.readtoend();
messagebox.show( retstring);
}
}

}

private void button5_click(object sender, eventargs e)
{
openfiledialog openfiledialog1 = new openfiledialog();
openfiledialog1.initialdirectory = "c:\\";//注意这里写路径时要用c:\\而不是c:\
openfiledialog1.filter = "图片|*.jpg|png|*.png|所有文件|*.*";
openfiledialog1.restoredirectory = true;
openfiledialog1.filterindex = 1;
if (openfiledialog1.showdialog() == dialogresult.ok)
{
try
{
string path = openfiledialog1.filename;
webclient wc = new webclient();
wc.credentials = credentialcache.defaultcredentials;
wc.headers.add("content-type", "application/x-www-form-urlencoded");
// wc.headers.add("content-type", "multipart/form-data");
//wc.querystring["fname"] = openfiledialog1.safefilename;//没用
//messagebox.show(openfiledialog1.safefilename);
byte[] fileb = wc.uploadfile(new uri(@"http://localhost/winformpost/up.aspx?p1=webclient&fname=" + openfiledialog1.safefilename), "post", path);
string res = encoding.getencoding("gb2312").getstring(fileb);
wc.dispose();
messagebox.show(res);
}
catch (exception ex)
{
messagebox.show(ex.message);
}

}
}
//上传文件：要设置共享文件夹是否有创建的权限，否则无法上传文件uploadfile("d:\\1.jpg", "http://localhost/winformpost/up.aspx", "", "");
public void uploadfile(string filenamepath, string urlpath, string user, string pwd)
{
string newfilename = filenamepath.substring(filenamepath.lastindexof(@"\") + 1);//取文件名称
messagebox.show(newfilename);
if (urlpath.endswith(@"\") == false) urlpath = urlpath + @"\";

urlpath = urlpath + newfilename;

webclient mywebclient = new webclient();
//networkcredential cread = new networkcredential(user, pwd, "domain");
//mywebclient.credentials = cread;
filestream fs = new filestream(filenamepath, filemode.open, fileaccess.read);
binaryreader r = new binaryreader(fs);

try
{
byte[] postarray = r.readbytes((int)fs.length);
stream poststream = mywebclient.openwrite(urlpath);
// poststream.m
if (poststream.canwrite)
{
poststream.write(postarray, 0, postarray.length);
messagebox.show("文件上传成功！", "提醒", messageboxbuttons.ok, messageboxicon.information);
}
else
{
messagebox.show("文件上传错误！", "警告", messageboxbuttons.ok, messageboxicon.warning);
}

poststream.close();
}
catch (exception ex)
{
messagebox.show(ex.message, "错误");
}

}

}
}

---

 

后端

 

using system;
using system.collections.generic;
using system.linq;
using system.web;
using system.web.ui;
using system.web.ui.webcontrols;

namespace winformpost
{
public partial class up : system.web.ui.page
{
protected void page_load(object sender, eventargs e)
{
httppostedfile f;
if (request.files.count > 0)
{
for (int i = 0; i < request.files.count; i++)
{
f = request.files[i];
string fname = request.querystring["fname"];
if (string.isnullorempty(fname) == false)
f.saveas(server.mappath("~/uploadfiles/") + fname);
else
{
random rnd = new random();
f.saveas(server.mappath("~/uploadfiles/") +rnd.next(99999)+ "_002.jpg");
}
}

}
string p1 = request["p1"];
if (string.isnullorempty(p1)==false)
{
response.write("p1=" + p1);
}
response.write("\r\nend");
response.end();
}
}
}

 

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