C#Post传图片
先上代码using System;using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.IO;
using System.Drawing;
using System.Web;
using System.Net;
namespace postpic
{
class postClass
{
/// <summary>
/// 向服务器post文字和图片
/// </summary>
///<param name="url">url
///<param name="userName">用户名
///<param name="userPwd">密码
///<param name="jpegPath">头像地址
/// <returns>返回服务器返回值</returns>
public string post(string url,string userName, string userPwd, string jpegPath)
{
//将图片转化为byte[]再转化为string
string array = Convert.ToBase64String(imageToByteArray(jpegPath));
//构造post提交字段
string para = name=+userName+&pwd=+userPwd+&head=+HttpUtility.UrlEncode(array);
#region HttpWebRequest写法
HttpWebRequest httpWeb = (HttpWebRequest)WebRequest.Create(url);
httpWeb.Timeout = 20000;
httpWeb.Method = POST;
httpWeb.ContentType = application/x-www-form-urlencoded;
byte[] bytePara = Encoding.ASCII.GetBytes(para);
using (Stream reqStream = httpWeb.GetRequestStream())
{
//提交数据
reqStream.Write(bytePara, 0, para.Length);
}
//获取服务器返回值
HttpWebResponse httpWebResponse = (HttpWebResponse)httpWeb.GetResponse();
Stream stream = httpWebResponse.GetResponseStream();
StreamReader streamReader = new StreamReader(stream, Encoding.GetEncoding(utf-8));
//获得返回值
string result = streamReader.ReadToEnd();
stream.Close();
#endregion
//将服务器返回值返回
return result;
}
/// <summary>
/// 图片转为Byte字节数组
/// </summary>
///<param name="FilePath">路径
/// <returns>字节数组</returns>
private byte[] imageToByteArray(string FilePath)
{
using (MemoryStream ms = new MemoryStream())
{
using (Image imageIn = Image.FromFile(FilePath))
{
using (Bitmap bmp = new Bitmap(imageIn))
{
bmp.Save(ms, imageIn.RawFormat);
}
}
return ms.ToArray();
}
}
}
}
其实仔细看 很简单 就是把图片流转为Byte[]然后提交。 在服务器端 在用相同方法反着转回来就行了。
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