文件上传

mac2022-06-30 89

这个是我网上摘要的

using System;using System.Collections;using System.Collections.Specialized;using System.Globalization;using System.IO;using System.Text;using System.Web;using System.Reflection;

namespace myHttpModule{ /// <summary> /// HttpUploadModule 的摘要说明。 /// </summary> public class HttpUploadModule : IHttpModule { public HttpUploadModule() { // // TODO: 在此处添加构造函数逻辑 // } public void Init(HttpApplication application) { application.BeginRequest += new EventHandler(this.Application_BeginRequest); application.EndRequest += new EventHandler(this.Application_EndRequest); application.Error += new EventHandler(this.Application_Error); }

public void Dispose() { }

private void Application_BeginRequest(Object sender, EventArgs e) { HttpApplication app = sender as HttpApplication;

// 如果是文件上传 if (IsUploadRequest(app.Request)) { // 返回 HTTP 请求正文已被读取的部分。 HttpWorkerRequest request = GetWorkerRequest(app.Context); Encoding encoding = app.Context.Request.ContentEncoding;

int bytesRead = 0; // 已读数据大小 int read; // 当前读取的块的大小 int count = 8192; // 分块大小 byte[] buffer; // 保存所有上传的数据 byte[] tempBuff = null;

if (request != null) { tempBuff = request.GetPreloadedEntityBody(); } if (tempBuff != null) { // 获取上传大小 // long length = long.Parse(request.GetKnownRequestHeader(HttpWorkerRequest.HeaderContentLength));

buffer = new byte[length]; count = tempBuff.Length; // 分块大小

// 将已上传数据复制过去 // Buffer.BlockCopy(tempBuff, 0, buffer, bytesRead, count);

// 开始记录已上传大小 // bytesRead = tempBuff.Length;

// 循环分块读取，直到所有数据读取结束 // while (request.IsClientConnected() && !request.IsEntireEntityBodyIsPreloaded() && bytesRead < length ) { // 如果最后一块大小小于分块大小，则重新分块 // if (bytesRead + count > length) { count = (int)(length - bytesRead); tempBuff = new byte[count]; }

// 分块读取 // read = request.ReadEntityBody(tempBuff, count);

// 复制已读数据块 // Buffer.BlockCopy(tempBuff, 0, buffer, bytesRead, read);

// 记录已上传大小 // bytesRead += read;

} if ( request.IsClientConnected() && !request.IsEntireEntityBodyIsPreloaded() ) {

// 传入已上传完的数据 // InjectTextParts(request, buffer);

// 表示上传已结束

} } } }

/// <summary> /// 结束请求后移除进度信息 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private void Application_EndRequest(Object sender, EventArgs e) {

}

/// <summary> /// 如果出错了设置进度信息中状态为“Error” /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private void Application_Error(Object sender, EventArgs e) {

}

HttpWorkerRequest GetWorkerRequest(HttpContext context) {

IServiceProvider provider = (IServiceProvider)HttpContext.Current; return (HttpWorkerRequest)provider.GetService(typeof(HttpWorkerRequest)); }

/// <summary> /// 传入已上传完的数据 /// </summary> /// <param name="request"></param> /// <param name="textParts"></param> void InjectTextParts(HttpWorkerRequest request, byte[] textParts) { BindingFlags bindingFlags = BindingFlags.Instance | BindingFlags.NonPublic;

Type type = request.GetType();

while ((type != null) && (type.FullName != "System.Web.Hosting.ISAPIWorkerRequest")) { type = type.BaseType; }

if (type != null) { type.GetField("_contentAvailLength", bindingFlags).SetValue(request, textParts.Length); type.GetField("_contentTotalLength", bindingFlags).SetValue(request, textParts.Length); type.GetField("_preloadedContent", bindingFlags).SetValue(request, textParts); type.GetField("_preloadedContentRead", bindingFlags).SetValue(request, true); } }

/// <summary> /// 是否为附件上传 /// 判断的根据是ContentType中有无multipart/form-data /// </summary> /// <param name="request"></param> /// <returns></returns> bool IsUploadRequest(HttpRequest request) { return request.ContentType.ToLower() == "multipart/form-data"; }

}}3， web Config 中加入以下配置

<system.web>

</system.web>

<system.webServer> <security> <requestFiltering> <requestLimits maxAllowedContentLength="1000000000"/> </requestFiltering> </security> </system.webServer>

4,新建一个上传文件的页面，加入如下两个控件

<asp:FileUpload ID="FileUpload1" runat="server" /> <asp:Button ID="btnUpload" runat="server" οnclick="btnUpload_Click" Text="开始上传" />

click 的事件如下：（就最简单的保存一下，记得在和你的上传页面同一目录下创建一个文件夹叫file）

protected void btnUpload_Click(object sender, EventArgs e) { string fileName = System.IO.Path.GetFileName(this.FileUpload1.FileName); string path = Server.MapPath("file/"); this.FileUpload1.SaveAs(path + fileName); }

就这样，按下F5 就可以运行上传文件了。就可以上传100M 以内的文件了。

如果你要部署到IIS7 上，你需要把程序部署在framework4 的application pool，用经典模式哦。

（怎么建立application pool，以及把你的应用程序部署到这个application pool 上，以及设置经典模式等，不会的会就问问你同事朋友哦，再不会也可以找我哦，这就不说了，太简单了。）

最后一步：如果你是透过ISS访问，一定要启用ISAPI AND CGI Restrictions 哦

转载于:https://www.cnblogs.com/bxbz/p/4186189.html

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