C#实现图片上传(PC端和APP)保存及 跨域上传说明
作者:深入学习ing 发布时间:2022-11-10 17:05:11
标签:c#,跨域,上传
A-PC端:
1-页面--multiple是控制单张还是多张图片上传
<input id="BusRoute" type="file" class="btn btn-default btn-lg" style="height:34px;padding-top:5px;padding-bottom:5px;" multiple />
2-后台获取图片文件:
HttpFileCollection pcFileColl = HttpContext.Current.Request.Files;
3-保存示例:
#region 创建目录
//完整存储路径
string completeUrl = "";
//相对等级路径
string relativeUrl = "";
//string saveTempPath = "~/Resources/Pic";
//string picUploadPath = HttpContext.Current.Server.MapPath(saveTempPath);
//添加根目录
completeUrl = @"\\10.0.8.52\YuanXinFiles\Office\"; ;
//添加一级目录
string relativeOneUrl = DateTime.Now.Year.ToString();
completeUrl += "\\" + relativeOneUrl;
relativeUrl += "\\" + relativeOneUrl;
if (!Directory.Exists(completeUrl))
{
Directory.CreateDirectory(completeUrl);
}
//添加二级目录
string relativeTwoUrl = DateTime.Now.Month.ToString();
completeUrl += "\\" + relativeTwoUrl;
relativeUrl += "\\" + relativeTwoUrl;
if (!Directory.Exists(completeUrl))
{
Directory.CreateDirectory(completeUrl);
}
#endregion
//保存
HttpFileCollection picColl = picModel.PcFileColl;
for (var i = 0; i < picColl.Count; i++)
{
HttpPostedFile file = picColl[i];
//保存图片
//保存至指定目录
file.SaveAs(completeUrl + "\\" + fileName);
}
B-APP:
前端页面长什么样不管了,后台拿到的是base64的字符串集合.
1-保存示例:
#region 创建目录
//完整存储路径
string completeUrl = "";
//相对等级路径
string relativeUrl = "";
//string saveTempPath = "~/Resources/Pic";
//string picUploadPath = HttpContext.Current.Server.MapPath(saveTempPath);
//添加根目录
completeUrl = @"\\10.0.8.52\YuanXinFiles\Office\"; ;
//添加一级目录
string relativeOneUrl = DateTime.Now.Year.ToString();
completeUrl += "\\" + relativeOneUrl;
relativeUrl += "\\" + relativeOneUrl;
if (!Directory.Exists(completeUrl))
{
Directory.CreateDirectory(completeUrl);
}
//添加二级目录
string relativeTwoUrl = DateTime.Now.Month.ToString();
completeUrl += "\\" + relativeTwoUrl;
relativeUrl += "\\" + relativeTwoUrl;
if (!Directory.Exists(completeUrl))
{
Directory.CreateDirectory(completeUrl);
}
#endregion
//保存
byte[] bytes = Convert.FromBase64String(strPic.picCode);
MemoryStream memStream = new MemoryStream(bytes);
BinaryFormatter binFormatter = new BinaryFormatter();
System.Drawing.Bitmap map = new Bitmap(memStream);
Image image = (Image)map;
string imageName = Guid.NewGuid().ToString("N");
//保存图片
image.Save(completeUrl + "\\" + imageName + "." + strPic.picType); //保存图片
C-跨域保存问题:
跨域的常见场景如下图所示:我们通过电脑的网络影射,连接到所需要的目录,这里添加上拥有权限的人员账号即可访问目标文件夹,那么使用C#代码如何获得访问权限呢?
要获取以上访问权限,需要引用一个类和添加一些简单代码:
1-访问代码:
/// <summary>
/// 通过指定用户执行上次图片操作
/// </summary>
/// <param name="uploadAction"></param>
public void UploadFileByUser(Action uploadAction)
{
//参考类:D:\SourceCode\MCSFramework\02.Develop\MobileWebApp\YuanXin\Services\FileUploadService\Controllers\UploadController.cs
//无法通过权限认证--只能通过外网访问
try
{
var ip = "10.0.8.52";
var domain = "sinooceanland";
var username = ConfigurationManager.AppSettings["uploadUserName"].ToString(); //配置的用户名
var pwd = ConfigurationManager.AppSettings["uploadPassword"].ToString(); //配置的密码
var root = ConfigurationManager.AppSettings["uploadRootPath"].ToString(); //配置的文件根路径
using (NetworkShareAccesser.Access(ip, domain, username, pwd)) //建立连接
{
uploadAction(); //图片保存代码
}
}
catch (System.Exception e)
{
}
}
2-必须类:
public class NetworkShareAccesser : IDisposable
{
private string _remoteUncName;
private string _remoteComputerName;
public string RemoteComputerName
{
get
{
return this._remoteComputerName;
}
set
{
this._remoteComputerName = value;
this._remoteUncName = @"\\" + this._remoteComputerName;
}
}
public string UserName
{
get;
set;
}
public string Password
{
get;
set;
}
#region Consts
private const int RESOURCE_CONNECTED = 0x00000001;
private const int RESOURCE_GLOBALNET = 0x00000002;
private const int RESOURCE_REMEMBERED = 0x00000003;
private const int RESOURCETYPE_ANY = 0x00000000;
private const int RESOURCETYPE_DISK = 0x00000001;
private const int RESOURCETYPE_PRINT = 0x00000002;
private const int RESOURCEDISPLAYTYPE_GENERIC = 0x00000000;
private const int RESOURCEDISPLAYTYPE_DOMAIN = 0x00000001;
private const int RESOURCEDISPLAYTYPE_SERVER = 0x00000002;
private const int RESOURCEDISPLAYTYPE_SHARE = 0x00000003;
private const int RESOURCEDISPLAYTYPE_FILE = 0x00000004;
private const int RESOURCEDISPLAYTYPE_GROUP = 0x00000005;
private const int RESOURCEUSAGE_CONNECTABLE = 0x00000001;
private const int RESOURCEUSAGE_CONTAINER = 0x00000002;
private const int CONNECT_INTERACTIVE = 0x00000008;
private const int CONNECT_PROMPT = 0x00000010;
private const int CONNECT_REDIRECT = 0x00000080;
private const int CONNECT_UPDATE_PROFILE = 0x00000001;
private const int CONNECT_COMMANDLINE = 0x00000800;
private const int CONNECT_CMD_SAVECRED = 0x00001000;
private const int CONNECT_LOCALDRIVE = 0x00000100;
#endregion
#region Errors
private const int NO_ERROR = 0;
private const int ERROR_ACCESS_DENIED = 5;
private const int ERROR_ALREADY_ASSIGNED = 85;
private const int ERROR_BAD_DEVICE = 1200;
private const int ERROR_BAD_NET_NAME = 67;
private const int ERROR_BAD_PROVIDER = 1204;
private const int ERROR_CANCELLED = 1223;
private const int ERROR_EXTENDED_ERROR = 1208;
private const int ERROR_INVALID_ADDRESS = 487;
private const int ERROR_INVALID_PARAMETER = 87;
private const int ERROR_INVALID_PASSWORD = 1216;
private const int ERROR_MORE_DATA = 234;
private const int ERROR_NO_MORE_ITEMS = 259;
private const int ERROR_NO_NET_OR_BAD_PATH = 1203;
private const int ERROR_NO_NETWORK = 1222;
private const int ERROR_BAD_PROFILE = 1206;
private const int ERROR_CANNOT_OPEN_PROFILE = 1205;
private const int ERROR_DEVICE_IN_USE = 2404;
private const int ERROR_NOT_CONNECTED = 2250;
private const int ERROR_OPEN_FILES = 2401;
#endregion
#region PInvoke Signatures
[DllImport("Mpr.dll")]
private static extern int WNetUseConnection(
IntPtr hwndOwner,
NETRESOURCE lpNetResource,
string lpPassword,
string lpUserID,
int dwFlags,
string lpAccessName,
string lpBufferSize,
string lpResult
);
[DllImport("Mpr.dll")]
private static extern int WNetCancelConnection2(
string lpName,
int dwFlags,
bool fForce
);
[StructLayout(LayoutKind.Sequential)]
private class NETRESOURCE
{
public int dwScope = 0;
public int dwType = 0;
public int dwDisplayType = 0;
public int dwUsage = 0;
public string lpLocalName = "";
public string lpRemoteName = "";
public string lpComment = "";
public string lpProvider = "";
}
#endregion
/// <summary>
/// Creates a NetworkShareAccesser for the given computer name. The user will be promted to enter credentials
/// </summary>
/// <param name="remoteComputerName"></param>
/// <returns></returns>
public static NetworkShareAccesser Access(string remoteComputerName)
{
return new NetworkShareAccesser(remoteComputerName);
}
/// <summary>
/// Creates a NetworkShareAccesser for the given computer name using the given domain/computer name, username and password
/// </summary>
/// <param name="remoteComputerName"></param>
/// <param name="domainOrComuterName"></param>
/// <param name="userName"></param>
/// <param name="password"></param>
public static NetworkShareAccesser Access(string remoteComputerName, string domainOrComuterName, string userName, string password)
{
return new NetworkShareAccesser(remoteComputerName,
domainOrComuterName + @"\" + userName,
password);
}
/// <summary>
/// Creates a NetworkShareAccesser for the given computer name using the given username (format: domainOrComputername\Username) and password
/// </summary>
/// <param name="remoteComputerName"></param>
/// <param name="userName"></param>
/// <param name="password"></param>
public static NetworkShareAccesser Access(string remoteComputerName, string userName, string password)
{
return new NetworkShareAccesser(remoteComputerName,
userName,
password);
}
private NetworkShareAccesser(string remoteComputerName)
{
RemoteComputerName = remoteComputerName;
this.ConnectToShare(this._remoteUncName, null, null, true);
}
private NetworkShareAccesser(string remoteComputerName, string userName, string password)
{
RemoteComputerName = remoteComputerName;
UserName = userName;
Password = password;
this.ConnectToShare(this._remoteUncName, this.UserName, this.Password, false);
}
private void ConnectToShare(string remoteUnc, string username, string password, bool promptUser)
{
NETRESOURCE nr = new NETRESOURCE
{
dwType = RESOURCETYPE_DISK,
lpRemoteName = remoteUnc
};
int result;
if (promptUser)
{
result = WNetUseConnection(IntPtr.Zero, nr, "", "", CONNECT_INTERACTIVE | CONNECT_PROMPT, null, null, null);
}
else
{
result = WNetUseConnection(IntPtr.Zero, nr, password, username, 0, null, null, null);
}
if (result != NO_ERROR)
{
throw new Win32Exception(result);
}
}
private void DisconnectFromShare(string remoteUnc)
{
int result = WNetCancelConnection2(remoteUnc, CONNECT_UPDATE_PROFILE, false);
if (result != NO_ERROR)
{
throw new Win32Exception(result);
}
}
/// <summary>
/// Performs application-defined tasks associated with freeing, releasing, or resetting unmanaged resources.
/// </summary>
/// <filterpriority>2</filterpriority>
public void Dispose()
{
this.DisconnectFromShare(this._remoteUncName);
}
}
以上所述是小编给大家介绍的C#实现图片上传(PC端和APP)保存及 跨域上传说明网站的支持!
来源:http://www.cnblogs.com/lxhbky/archive/2016/12/08/6144172.html
0
投稿
猜你喜欢
- 使用wpf程序常常会出现一个问题,那就是内存占用过高,使用wpf的程序功能越复杂往往用着用着内存就本着90往上去了。一方面wpf本身是一个u
- Mybatis typeAlias标签在实际的工程之中,类的全限定名称很长,当我们需要大量使用的时候,这非常不方便的,然而mybatis提供
- 本文提供了基于MD5加密16位和32位的方法,具体内容如下import java.io.IOException;import java.ma
- 本文实例讲述了C#获取路径的几种方式。分享给大家供大家参考。具体如下:string str1 =Process.GetCurrentProc
- 一、运行class文件执行带main方法的class文件,命令行为:java <CLASS文件名>注意:CLASS文件名不要带文
- 前言上篇Java Mybatis数据源之工厂模式文章中我们介绍了Mybatis的数据源模块的DataSource接口和它对应的实现
- 一:在springboot中使用事物遇到的坑1.我们知道spring中的事物分为两种:一种是编程式事物,一种是声明式事物。顾名思义,编程式事
- Swing包的介绍Java基础类数据库(Java Foundation Class)给java应用程序增加了图形界面、丰富的功能性以及与用户
- 本文实例讲述了C#中实现子类调用父类的方法,分享给大家供大家参考之用。具体方法如下:一、通过子类无参构造函数创建子类实例创建父类Person
- C#删除指定文件或文件夹public static string deleteOneFile(string fileFullPath) &n
- Knn算法的核心思想是如果一个样本在特征空间中的K个最相邻的样本中的大多数属于某一个类别,则该样本也属于这个类别,并具有这个类别上样本的特性
- 返回值转成JSONString的处理主要需求描述有些返回值中的null需要转换成“”或[],另外有些
- 在java中用到的最多的时间类莫过于 java.util.Date了, 由于Date类中将getYear(),getMonth()等获取年、
- •强引用(FinalReference),在java中,有点像C++的指针,通过引用,可以对堆中的对象进行操作。强引用具备以下特点: 1.强
- 本文将介绍一种通过代码控制ListView上下滚动的方法。先上图:按下按钮会触发ListView滚动或停止。实现该功能并不难,下面给出主要代
- 今天在接手别人的一个项目的时候遇到一个坑,坑死我了;是一个打包的问题,好不容易我把代码写完了准备打包测试了,结果java -jar xxx.
- 原因分析使用ajax从前台页面传输数据到后台controller控制器的时候,出现中文乱码其实乱码问题出现的原因,就是由于默认的tomcat
- TimeSpan 结构 表示一个时间间隔。命名空间:System 程序集:mscorlib(在 mscorlib.dll 中)说
- mybatis 映射文件中,if标签判断字符串相等,两种方式:因为mybatis映射文件,是使用的ognl表达式,所以在判断字符串sex变量
- Java 线程池原理Executor框架的两级调度模型在HotSpot VM的模型中,Java线程被一对一映射为本地操作系统线程。JAVA线