How to fix multiple file upload maximum path length limitation in ASP.Net MVC 5?

Question

My file upload is working fine with City 3 but for other cities it's not.
I followed the advice in this site in editing the web.config but, I don't have luck to do it right. What I am missing?

Tested CSV Files
City 1 CSV => doesn't work with normal browser but works on chromium
484 Files
9.40 MB

City 2 CSV => doesn't work with normal browser but works on chromium
824 Files
31.7 MB

City 3 CSV => uploading and working
396 Files
10.7 MB

A single csv file is between maximum 150KB and mininum 1KB
Filename sample: City1-Fixed-FC6947BDF3AA-GTW_FC6947BDF3AA_OMS_RDS_20190127_110000.csv

web.config

<?xml version="1.0" encoding="utf-8"?>
<!--
  For more information on how to configure your ASP.NET application, please visit
  https://go.microsoft.com/fwlink/?LinkId=301880
  -->
<configuration>
  <configSections>
    <!-- For more information on Entity Framework configuration, visit http://go.microsoft.com/fwlink/?LinkID=237468 -->
    <section name="entityFramework" type="System.Data.Entity.Internal.ConfigFile.EntityFrameworkSection, EntityFramework, Version=6.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" requirePermission="false" />
  </configSections>
  <connectionStrings>    
    <add name="W0rldEntities" connectionString="metadata=res://*/Model.csdl|res://*/Model.ssdl|res://*/Model.msl;provider=System.Data.SqlClient;provider connection string=&quot;data source=.;initial catalog=XXXXXXX;user id=sa;password=101010;MultipleActiveResultSets=True;App=EntityFramework&quot;" providerName="System.Data.EntityClient" />
    <add name="DefaultConnection" connectionString="Data Source=.; Initial Catalog=XXXXXXX; Persist Security Info=True; User ID=sa; Password=101010" providerName="System.Data.SqlClient" />
  </connectionStrings>
  <appSettings>
    <add key="webpages:Version" value="3.0.0.0" />
    <add key="webpages:Enabled" value="false" />
    <add key="ClientValidationEnabled" value="true" />
    <add key="UnobtrusiveJavaScriptEnabled" value="true" />
  </appSettings>
  <system.web>
    <authentication mode="None" />
    <compilation debug="true" targetFramework="4.6.2" />
    <httpRuntime targetFramework="4.6.2" maxRequestLength="102400" executionTimeout="3600" />
    <httpModules>
      <add name="ApplicationInsightsWebTracking" type="Microsoft.ApplicationInsights.Web.ApplicationInsightsHttpModule, Microsoft.AI.Web" />
    </httpModules>
  </system.web>
  <system.webServer>
    <security>
      <requestFiltering>
        <requestLimits maxAllowedContentLength="104857600" />
      </requestFiltering>
    </security>
    <modules>
      <remove name="FormsAuthentication" />
      <remove name="TelemetryCorrelationHttpModule" />
      <add name="TelemetryCorrelationHttpModule" type="Microsoft.AspNet.TelemetryCorrelation.TelemetryCorrelationHttpModule, Microsoft.AspNet.TelemetryCorrelation" preCondition="integratedMode,managedHandler" />
      <remove name="ApplicationInsightsWebTracking" />
      <add name="ApplicationInsightsWebTracking" type="Microsoft.ApplicationInsights.Web.ApplicationInsightsHttpModule, Microsoft.AI.Web" preCondition="managedHandler" />
    </modules>
    <validation validateIntegratedModeConfiguration="false" />
    <handlers>
      <remove name="ExtensionlessUrlHandler-Integrated-4.0" />
      <remove name="OPTIONSVerbHandler" />
      <remove name="TRACEVerbHandler" />
      <add name="ExtensionlessUrlHandler-Integrated-4.0" path="*." verb="*" type="System.Web.Handlers.TransferRequestHandler" preCondition="integratedMode,runtimeVersionv4.0" />
    </handlers>
  </system.webServer>
  <runtime>
    <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
      <dependentAssembly>
        <assemblyIdentity name="Microsoft.Owin.Security" publicKeyToken="31bf3856ad364e35" />
        <bindingRedirect oldVersion="0.0.0.0-4.0.0.0" newVersion="4.0.0.0" />
      </dependentAssembly>
      <dependentAssembly>
        <assemblyIdentity name="Microsoft.Owin.Security.OAuth" publicKeyToken="31bf3856ad364e35" />
        <bindingRedirect oldVersion="0.0.0.0-4.0.0.0" newVersion="4.0.0.0" />
      </dependentAssembly>
      <dependentAssembly>
        <assemblyIdentity name="Microsoft.Owin.Security.Cookies" publicKeyToken="31bf3856ad364e35" />
        <bindingRedirect oldVersion="0.0.0.0-4.0.0.0" newVersion="4.0.0.0" />
      </dependentAssembly>
      <dependentAssembly>
        <assemblyIdentity name="Microsoft.Owin" publicKeyToken="31bf3856ad364e35" />
        <bindingRedirect oldVersion="0.0.0.0-4.0.0.0" newVersion="4.0.0.0" />
      </dependentAssembly>
      <dependentAssembly>
        <assemblyIdentity name="Antlr3.Runtime" publicKeyToken="eb42632606e9261f" />
        <bindingRedirect oldVersion="0.0.0.0-3.5.0.2" newVersion="3.5.0.2" />
      </dependentAssembly>
      <dependentAssembly>
        <assemblyIdentity name="System.Diagnostics.DiagnosticSource" publicKeyToken="cc7b13ffcd2ddd51" />
        <bindingRedirect oldVersion="0.0.0.0-4.0.2.1" newVersion="4.0.2.1" />
      </dependentAssembly>
      <dependentAssembly>
        <assemblyIdentity name="System.Web.Optimization" publicKeyToken="31bf3856ad364e35" />
        <bindingRedirect oldVersion="0.0.0.0-1.1.0.0" newVersion="1.1.0.0" />
      </dependentAssembly>
      <dependentAssembly>
        <assemblyIdentity name="WebGrease" publicKeyToken="31bf3856ad364e35" />
        <bindingRedirect oldVersion="0.0.0.0-1.6.5135.21930" newVersion="1.6.5135.21930" />
      </dependentAssembly>
      <dependentAssembly>
        <assemblyIdentity name="Newtonsoft.Json" publicKeyToken="30ad4fe6b2a6aeed" />
        <bindingRedirect oldVersion="0.0.0.0-11.0.0.0" newVersion="11.0.0.0" />
      </dependentAssembly>
      <dependentAssembly>
        <assemblyIdentity name="System.Web.Helpers" publicKeyToken="31bf3856ad364e35" />
        <bindingRedirect oldVersion="0.0.0.0-3.0.0.0" newVersion="3.0.0.0" />
      </dependentAssembly>
      <dependentAssembly>
        <assemblyIdentity name="System.Web.Mvc" publicKeyToken="31bf3856ad364e35" />
        <bindingRedirect oldVersion="0.0.0.0-5.2.4.0" newVersion="5.2.4.0" />
      </dependentAssembly>
      <dependentAssembly>
        <assemblyIdentity name="System.Web.WebPages" publicKeyToken="31bf3856ad364e35" />
        <bindingRedirect oldVersion="0.0.0.0-3.0.0.0" newVersion="3.0.0.0" />
      </dependentAssembly>
    </assemblyBinding>
  </runtime>
  <entityFramework>
    <defaultConnectionFactory type="System.Data.Entity.Infrastructure.LocalDbConnectionFactory, EntityFramework">
      <parameters>
        <parameter value="mssqllocaldb" />
      </parameters>
    </defaultConnectionFactory>
    <providers>
      <provider invariantName="System.Data.SqlClient" type="System.Data.Entity.SqlServer.SqlProviderServices, EntityFramework.SqlServer" />
    </providers>
  </entityFramework>
  <system.codedom>
    <compilers>
      <compiler language="c#;cs;csharp" extension=".cs" type="Microsoft.CodeDom.Providers.DotNetCompilerPlatform.CSharpCodeProvider, Microsoft.CodeDom.Providers.DotNetCompilerPlatform, Version=1.0.8.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" warningLevel="4" compilerOptions="/langversion:default /nowarn:1659;1699;1701" />
      <compiler language="vb;vbs;visualbasic;vbscript" extension=".vb" type="Microsoft.CodeDom.Providers.DotNetCompilerPlatform.VBCodeProvider, Microsoft.CodeDom.Providers.DotNetCompilerPlatform, Version=1.0.8.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" warningLevel="4" compilerOptions="/langversion:default /nowarn:41008 /define:_MYTYPE=\&quot;Web\&quot; /optionInfer+" />
    </compilers>
  </system.codedom>
</configuration>

Model

public class FileModel
{
    [Required(ErrorMessage = "Please select file.")]
    [Display(Name = "Browse File")]
    public IEnumerable<HttpPostedFileBase> files { get; set; }
}

View

@model WaterW0rld.Models.FileModel

@{
    ViewBag.Title = "UploadFiles";
}

<div class="row">
    <div class="col-sm-12">
        <div class="card card-body">
            <h4 class="card-title">Meter Readings</h4>
            <small class="card-subtitle"> Upload meter readings data. </small>
            <div class="tab-content br-n pn">                  
                @using (Html.BeginForm("UploadFiles", "MeterReading", FormMethod.Post, new { enctype = "multipart/form-data" }))
                {
                    @Html.AntiForgeryToken()
                    <div class="form-horizontal">
                        <hr />
                        @Html.ValidationSummary(true, "", new { @class = "text-danger" })
                        <div class="form-group">
                            @Html.LabelFor(model => model.files, htmlAttributes: new { @class = "control-label col-md-2" })
                            <div class="col-md-10">
                                @Html.TextBoxFor(model => model.files, "", new { @type = "file", @multiple = "multiple" })
                                @Html.ValidationMessageFor(model => model.files, "", new { @class = "text-danger" })
                            </div>
                        </div>
                        <div class="form-group">
                            <div class="col-md-offset-2 col-md-10">
                                <input type="submit" value="Upload" class="btn btn-primary" />
                                @*TODO: Add notification while uploading *@
                            </div>
                        </div>
                        <div class="form-group">
                            <div class="col-md-offset-2 col-md-10 text-success">
                                @ViewBag.UploadStatus
                            </div>
                        </div>
                    </div>
                }                
            </div>
        </div>
    </div>
</div>

Controller

public ActionResult UploadFiles()
{
   return View();
}

[HttpPost]
public ActionResult UploadFiles(IEnumerable<HttpPostedFileBase> files)
{
        var dt = new DataTable();
            string hashes;

            if (ModelState.IsValid)
            {   
                var tasks = new List<Task>();
                foreach (var file in files)
                {
                    //Checking file is available to save.  
                    if (file != null)
                    {
                        var InputFileName = Path.GetFileName(file.FileName);
                        var ServerSavePath = Path.Combine(Server.MapPath("~/App_Data/Uploads/MeterReadings/") + InputFileName);

                        file.SaveAs(ServerSavePath);

                        string path = Path.Combine(Server.MapPath("~/App_Data/Uploads/MeterReadings/"), InputFileName);

                        if (!file.FileName.Contains("GTW_RAW"))
                        {                           
                            if (_pgf.GetGatewayLogDuplicate(path) == 0)
                            {
                                hashes = _pgf.GetHashes(path, path);                                                             
                                tasks.Add(Task.Run(() => _meterReadings.BulkInsertToDB(path, hashes)));
                            }
                        }
                        ViewBag.UploadStatus = files.Count().ToString() + " files uploaded successfully.";
                    }
                }
                Task.WaitAll(tasks.ToArray());
            }
            return RedirectToAction("Index", "Home");
        }

I want to upload all files regardless of how many it was as long as files size is in range of 100MB any workaround is welcome.

Define doesn't work. Look at the response the server is generating. What status code is it? What payload? — mjwills
– mjwills, Commented Jan 30, 2019 at 7:24
Use a tool which can capture request and response during file upload, you should get response contents. Related issue: stackoverflow.com/questions/19038390/…. — Tetsuya Yamamoto
– Tetsuya Yamamoto, Commented Jan 30, 2019 at 7:25
@mjwills sorry, I find culprit using this answer I have issue with file path ex. City1-Fixed-FC6947BDF3AA-GTW_FC6947BDF3AA_OMS_RDS_20190127_110000.csv when combine with other filename it consume max limitation length path of chrome browser. do you have workaround for this? — j1rjacob
– j1rjacob, Commented Jan 30, 2019 at 8:04
I am 100% sure also that there is no status code or payload response from server. In client side alone when you reach the limit File name area of file upload blank out. — j1rjacob
– j1rjacob, Commented Jan 30, 2019 at 8:12
doesn't work means doesn't upload; status code = none; payload = none — j1rjacob
– j1rjacob, Commented Jan 30, 2019 at 8:21

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