1.先用html的原始标签来完成上传图片功能，后台使用asp.net.
2.再用android的okhttp来代替html。
html
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" > <head> <title>HTML控件配合ASP。NET 上传</title> </head> <body> <form name="uploadForm" method="post" enctype="multipart/form-data" action="http://localhost/upload/Default.aspx"> <input id="name" name="name" style="width:220px;" /> <input type="file" id="imgFile" name="imgFile" style="width:220px;" /> <input type="file" id="imgFile2" name="imgFile2" style="width:220px;" /> <input type="file" id="imgFile3" name="imgFile3" style="width:220px;" /> <input type="submit" value="submit" /> </form> </body> </html>
asp.net 的后端
<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Default.aspx.cs" Inherits="upload._Default" %> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head runat="server"> <title></title> </head> <body> <form id="form1" runat="server"> <div> <asp:Label ID="Label1" runat="server" Text="Label"></asp:Label> </div> </form> </body> </html>
using System; using System.Collections.Generic; using System.Web; using System.Web.UI; using System.Web.UI.WebControls; namespace upload { public partial class _Default : System.Web.UI.Page { protected void Page_Load(object sender, EventArgs e) { if(!IsPostBack) { string name=this.Request.Form.Get("name"); string path = Server.MapPath(""); this.Label1.Text = "name:" + name + ".path:" + path; if (this.Request.Files.Count > 0) { for (int i = 0; i < this.Request.Files.Count;i++ ) { HttpPostedFile file = this.Request.Files.Get(i); string pathstr = path + "/aaupload"+System.DateTime.Now.ToFileTime().ToString() +"index"+ i.ToString()+ ".png"; try { file.SaveAs(pathstr); } catch { this.Label1.Text ="error:"+pathstr; } } } } } } }
原文：https://www.cnblogs.com/lsfv/p/12193171.html