asp.netmvc大文件分片上传资源-CSDN文库

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在ASP.NET MVC框架中，处理大文件上传是一个常见的挑战，因为单个文件的大小可能会超出服务器或HTTP协议的限制。为了克服这个问题，开发者通常采用文件分片上传的技术，即将大文件分割成多个小块（片段），然后逐个上传。这种方式不仅能够避免因文件过大而导致的上传失败，还能实现断点续传和显示进度条功能。本文将深入探讨ASP.NET MVC中大文件分片上传的实现机制、步骤以及如何实现文件合并与进度显示。 1. 分片上传原理：分片上传的基本思路是将大文件切割为多个固定大小的片段，每个片段作为一个独立的文件上传到服务器。服务器端收到每个片段后，将其存储并记录相关信息，如片段编号、总片段数等，以便后续的合并操作。 2. ASP.NET MVC实现步骤： - **前端**：在客户端，使用JavaScript库如jQuery、axios或原生API来实现文件选择、分片、上传和进度显示。通过监听`change`事件获取文件，使用FileReader API读取文件并分片，创建多个FormData对象，将每个片段作为数据部分，加上对应的片段编号等元信息，发送Ajax请求。 - **进度条**：每次上传片段时，可以通过监听xhr对象的`progress`事件来更新进度条。计算已上传的总字节数除以文件总字节数，得到上传进度。 - **后端**：在服务器端，ASP.NET MVC控制器接收上传的片段，可以使用`HttpPostedFileBase`类获取到上传的文件流。每个片段存储在一个临时目录下，同时维护一个数据库记录，存储片段信息，如文件ID、片段编号、是否上传完成等。 3. 文件合并：当所有片段上传完毕后，服务器需要将这些片段重新组合成原始文件。可以使用`FileStream`或`MemoryStream`读取每个片段，按顺序写入一个新的文件。确保所有片段按照正确的顺序和偏移量进行合并，以恢复原始文件内容。 4. 错误处理与断点续传： - **错误处理**：在上传过程中，如果出现网络中断或其他错误，客户端可以捕获异常并重新上传未完成的片段，而无需重新上传整个文件。 - **断点续传**：如果用户中断上传，服务器保存已上传的片段信息。当用户再次尝试上传时，可以从上次中断的地方继续。 5. 安全性考虑： - 保护用户隐私：确保只接受指定类型的文件，避免安全风险，如恶意脚本或病毒。 - 限制文件大小：设置上传大小限制，防止DoS攻击。 - 清理策略：对上传的临时文件和数据库记录，设定合理的清理策略，防止占用过多存储空间。 6. 实战项目：提供的"BigFileUploader"可能包含前端HTML、CSS、JavaScript代码，以及后端的C# ASP.NET MVC控制器代码。通过查看和分析这些代码，可以更好地理解大文件分片上传的实现细节。 ASP.NET MVC的大文件分片上传技术是通过前端分片、逐个上传，后端接收并存储片段，最后合并恢复文件，实现大文件的安全、高效上传，并通过进度条提高用户体验。在实际开发中，需结合具体需求进行优化和调整，确保系统稳定性和安全性。

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asp.net mvc 大文件分片上传（287个子文件）

Global.asax 107B

BigFileUploader.csprojResolveAssemblyReference.cache 130KB

DesignTimeResolveAssemblyReferencesInput.cache 19KB

applicationhost.config 84KB

ApplicationInsights.config 6KB

BigFileUploader.dll.config 3KB

Web.config 3KB

packages.config 2KB

Web.config 2KB

Web.Release.config 1KB

Web.Debug.config 1KB

VBCSCompiler.exe.config 563B

HomeController.cs 3KB

AssemblyInfo.cs 1KB

BundleConfig.cs 1KB

RouteConfig.cs 608B

Global.asax.cs 597B

FilterConfig.cs 283B

TemporaryGeneratedFile_036C0B5B-1481-4323-8D20-8F5ADCB23D92.cs 0B

TemporaryGeneratedFile_E7A71F73-0F8D-4B9B-B56E-8E70B10BC5D3.cs 0B

TemporaryGeneratedFile_5937a670-0e60-4077-877b-f7221da3dda1.cs 0B

Index.cshtml 4KB

_Layout.cshtml 2KB

Contact.cshtml 457B

Error.cshtml 277B

About.cshtml 152B

_ViewStart.cshtml 57B

BigFileUploader.csproj 15KB

bootstrap.css 118KB

bootstrap.min.css 96KB

Site.css 537B

webuploader.css 515B

Microsoft.CodeAnalysis.VisualBasic.dll 4.67MB

Microsoft.CodeAnalysis.CSharp.dll 3.82MB

Microsoft.AI.Agent.Intercept.dll 1.89MB

Microsoft.CodeAnalysis.dll 1.64MB

WebGrease.dll 1.22MB

System.Web.Mvc.dll 553KB

Newtonsoft.Json.dll 491KB

Newtonsoft.Json.dll 482KB

Newtonsoft.Json.dll 437KB

Newtonsoft.Json.dll 435KB

Newtonsoft.Json.dll 420KB

Newtonsoft.Json.dll 378KB

System.Web.Razor.dll 266KB

System.Reflection.Metadata.dll 257KB

System.Web.WebPages.dll 207KB

System.Collections.Immutable.dll 200KB

Microsoft.ApplicationInsights.dll 184KB

Microsoft.ApplicationInsights.dll 153KB

Microsoft.ApplicationInsights.dll 151KB

Microsoft.ApplicationInsights.dll 145KB

Microsoft.ApplicationInsights.dll 142KB

Microsoft.ApplicationInsights.dll 141KB

System.Web.Helpers.dll 137KB

Microsoft.AI.PerfCounterCollector.dll 129KB

Microsoft.AI.PerfCounterCollector.dll 127KB

Microsoft.AI.ServerTelemetryChannel.dll 104KB

Microsoft.AI.ServerTelemetryChannel.dll 101KB

Antlr3.Runtime.dll 101KB

Microsoft.Build.Tasks.CodeAnalysis.dll 83KB

System.Web.Optimization.dll 69KB

Microsoft.AI.DependencyCollector.dll 64KB

Microsoft.AI.DependencyCollector.dll 62KB

Microsoft.AI.Web.dll 50KB

Microsoft.AI.Web.dll 49KB

Microsoft.Web.Infrastructure.dll 44KB

Microsoft.AI.WindowsServer.dll 41KB

System.Web.WebPages.Deployment.dll 41KB

共 287 条

c:\users\zhoufugui\documents\visual studio 2015\Projects\BigFileUploader\BigFileUploader\bin\ApplicationInsights.config c:\users\zhoufugui\documents\visual studio 2015\Projects\BigFileUploader\BigFileUploader\bin\roslyn\csc.exe c:\users\zhoufugui\documents\visual studio 2015\Projects\BigFileUploader\BigFileUploader\bin\roslyn\Microsoft.Build.Tasks.CodeAnalysis.dll c:\users\zhoufugui\documents\visual studio 2015\Projects\BigFileUploader\BigFileUploader\bin\roslyn\Microsoft.CodeAnalysis.CSharp.dll c:\users\zhoufugui\documents\visual studio 2015\Projects\BigFileUploader\BigFileUploader\bin\roslyn\Microsoft.CodeAnalysis.dll c:\users\zhoufugui\documents\visual studio 2015\Projects\BigFileUploader\BigFileUploader\bin\roslyn\Microsoft.CodeAnalysis.VisualBasic.dll c:\users\zhoufugui\documents\visual studio 2015\Projects\BigFileUploader\BigFileUploader\bin\roslyn\Microsoft.CSharp.Core.targets c:\users\zhoufugui\documents\visual studio 2015\Projects\BigFileUploader\BigFileUploader\bin\roslyn\Microsoft.VisualBasic.Core.targets c:\users\zhoufugui\documents\visual studio 2015\Projects\BigFileUploader\BigFileUploader\bin\roslyn\System.Collections.Immutable.dll c:\users\zhoufugui\documents\visual studio 2015\Projects\BigFileUploader\BigFileUploader\bin\roslyn\System.Reflection.Metadata.dll c:\users\zhoufugui\documents\visual studio 2015\Projects\BigFileUploader\BigFileUploader\bin\roslyn\vbc.exe c:\users\zhoufugui\documents\visual studio 2015\Projects\BigFileUploader\BigFileUploader\bin\roslyn\VBCSCompiler.exe c:\users\zhoufugui\documents\visual studio 2015\Projects\BigFileUploader\BigFileUploader\bin\roslyn\VBCSCompiler.exe.config c:\users\zhoufugui\documents\visual studio 2015\Projects\BigFileUploader\BigFileUploader\bin\BigFileUploader.dll.config c:\users\zhoufugui\documents\visual studio 2015\Projects\BigFileUploader\BigFileUploader\bin\BigFileUploader.dll c:\users\zhoufugui\documents\visual studio 2015\Projects\BigFileUploader\BigFileUploader\bin\BigFileUploader.pdb c:\users\zhoufugui\documents\visual studio 2015\Projects\BigFileUploader\BigFileUploader\bin\Antlr3.Runtime.dll c:\users\zhoufugui\documents\visual studio 2015\Projects\BigFileUploader\BigFileUploader\bin\Microsoft.AI.Agent.Intercept.dll c:\users\zhoufugui\documents\visual studio 2015\Projects\BigFileUploader\BigFileUploader\bin\Microsoft.AI.DependencyCollector.dll c:\users\zhoufugui\documents\visual studio 2015\Projects\BigFileUploader\BigFileUploader\bin\Microsoft.AI.PerfCounterCollector.dll c:\users\zhoufugui\documents\visual studio 2015\Projects\BigFileUploader\BigFileUploader\bin\Microsoft.AI.ServerTelemetryChannel.dll c:\users\zhoufugui\documents\visual studio 2015\Projects\BigFileUploader\BigFileUploader\bin\Microsoft.AI.Web.dll c:\users\zhoufugui\documents\visual studio 2015\Projects\BigFileUploader\BigFileUploader\bin\Microsoft.AI.WindowsServer.dll c:\users\zhoufugui\documents\visual studio 2015\Projects\BigFileUploader\BigFileUploader\bin\Microsoft.ApplicationInsights.dll c:\users\zhoufugui\documents\visual studio 2015\Projects\BigFileUploader\BigFileUploader\bin\Microsoft.CodeDom.Providers.DotNetCompilerPlatform.dll c:\users\zhoufugui\documents\visual studio 2015\Projects\BigFileUploader\BigFileUploader\bin\Microsoft.Web.Infrastructure.dll c:\users\zhoufugui\documents\visual studio 2015\Projects\BigFileUploader\BigFileUploader\bin\Newtonsoft.Json.dll c:\users\zhoufugui\documents\visual studio 2015\Projects\BigFileUploader\BigFileUploader\bin\System.Web.Helpers.dll c:\users\zhoufugui\documents\visual studio 2015\Projects\BigFileUploader\BigFileUploader\bin\System.Web.Mvc.dll c:\users\zhoufugui\documents\visual studio 2015\Projects\BigFileUploader\BigFileUploader\bin\System.Web.Optimization.dll c:\users\zhoufugui\documents\visual studio 2015\Projects\BigFileUploader\BigFileUploader\bin\System.Web.Razor.dll c:\users\zhoufugui\documents\visual studio 2015\Projects\BigFileUploader\BigFileUploader\bin\System.Web.WebPages.Deployment.dll c:\users\zhoufugui\documents\visual studio 2015\Projects\BigFileUploader\BigFileUploader\bin\System.Web.WebPages.dll c:\users\zhoufugui\documents\visual studio 2015\Projects\BigFileUploader\BigFileUploader\bin\System.Web.WebPages.Razor.dll c:\users\zhoufugui\documents\visual studio 2015\Projects\BigFileUploader\BigFileUploader\bin\WebGrease.dll c:\users\zhoufugui\documents\visual studio 2015\Projects\BigFileUploader\BigFileUploader\bin\Microsoft.AI.DependencyCollector.xml c:\users\zhoufugui\documents\visual studio 2015\Projects\BigFileUploader\BigFileUploader\bin\Microsoft.AI.ServerTelemetryChannel.xml c:\users\zhoufugui\documents\visual studio 2015\Projects\BigFileUploader\BigFileUploader\bin\Microsoft.AI.Web.xml c:\users\zhoufugui\documents\visual studio 2015\Projects\BigFileUploader\BigFileUploader\bin\Microsoft.AI.WindowsServer.xml c:\users\zhoufugui\documents\visual studio 2015\Projects\BigFileUploader\BigFileUploader\bin\Microsoft.ApplicationInsights.xml c:\users\zhoufugui\documents\visual studio 2015\Projects\BigFileUploader\BigFileUploader\bin\Microsoft.CodeDom.Providers.DotNetCompilerPlatform.xml c:\users\zhoufugui\documents\visual studio 2015\Projects\BigFileUploader\BigFileUploader\bin\System.Web.Helpers.xml c:\users\zhoufugui\documents\visual studio 2015\Projects\BigFileUploader\BigFileUploader\bin\System.Web.Mvc.xml c:\users\zhoufugui\documents\visual studio 2015\Projects\BigFileUploader\BigFileUploader\bin\System.Web.Optimization.xml c:\users\zhoufugui\documents\visual studio 2015\Projects\BigFileUploader\BigFileUploader\bin\System.Web.Razor.xml c:\users\zhoufugui\documents\visual studio 2015\Projects\BigFileUploader\BigFileUploader\bin\System.Web.WebPages.xml c:\users\zhoufugui\documents\visual studio 2015\Projects\BigFileUploader\BigFileUploader\bin\System.Web.WebPages.Deployment.xml c:\users\zhoufugui\documents\visual studio 2015\Projects\BigFileUploader\BigFileUploader\bin\System.Web.WebPages.Razor.xml c:\users\zhoufugui\documents\visual studio 2015\Projects\BigFileUploader\BigFileUploader\bin\Antlr3.Runtime.pdb c:\users\zhoufugui\documents\visual studio 2015\Projects\BigFileUploader\BigFileUploader\bin\Newtonsoft.Json.xml c:\users\zhoufugui\documents\visual studio 2015\Projects\BigFileUploader\BigFileUploader\obj\Debug\BigFileUploader.csprojResolveAssemblyReference.cache c:\users\zhoufugui\documents\visual studio 2015\Projects\BigFileUploader\BigFileUploader\obj\Debug\BigFileUploader.dll c:\users\zhoufugui\documents\visual studio 2015\Projects\BigFileUploader\BigFileUploader\obj\Debug\BigFileUploader.pdb

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