During the upgrade of an old project from netcore2.2 to 3.1, an Ocelot gateway interface program changes the project file
- <TargetFramework>netcoreapp2.2</TargetFramework>
+ <TargetFramework>netcoreapp3.1</TargetFramework>Replace the Services.Addmvc() in your project:
services.AddMvc(options => { options.EnableEndpointRouting = false; });
services.AddMvc().SetCompatibilityVersion(CompatibilityVersion.Version_3_0);The method Configure(IApplicationBuilder app, IWebHostEnvironment env) retains the original app.UseMvc();
The compiler passed, but the runtime page reported an error: HTTP Error 500.37 – ANCM Failed to Start Within Startup Time, searched the web for a solution and gave a way to modify the startupTimeLimit value.
<?xml version="1.0"?>
<configuration xmlns:xdt="http://schemas.microsoft.com/XML-Document-Transform">
<location>
<system.webServer>
<aspNetCore xdt:Transform="SetAttributes(startupTimeLimit)" startupTimeLimit="300">
</aspNetCore>
</system.webServer>
</location>
</configuration>The run result page is directly inaccessible.
Solution:
You only need to add a project node
< AspNetCoreHostingModel> OutOfProcess OK.
<PropertyGroup>
<TargetFramework>netcoreapp3.1</TargetFramework>
<AspNetCoreHostingModel>OutOfProcess</AspNetCoreHostingModel>
</PropertyGroup>After doing the above, the project runs normally. In addition, the above services.AddMvc() is not the recommended solution.
AddMvc(); comment out app.UseMvc() in the Configure method; then add the following code.
//app.UseMvc();
app.UseRouting();//add
app.UseEndpoints(endpoints =>//add
{
endpoints.MapControllers();
});