Vue调用.NET Core Web Api接口显示No'Access-Control-Allow-Origin'

老规矩，先上图

解决方法：在ConfigureServices中配置

services.AddCors(options =>
{
options.AddPolicy(“AllowAll”,
builder =>
{
builder
.AllowAnyOrigin()
.AllowAnyMethod()
.AllowAnyHeader();
});
});

services.Configure(options =>
{
options.Filters.Add(new CorsAuthorizationFilterFactory(“AllowAll”));
});
在Configure中调用
app.UseCors(“AllowAll”);