Adds a new tenant resolve contributor

framework/src/Volo.Abp.MultiTenancy/Volo/Abp/MultiTenancy/ConfigurationTenantResolveContributor.cs

@@ -0,0 +1,27 @@
+using Microsoft.Extensions.Configuration;
+using Microsoft.Extensions.DependencyInjection;
+using Microsoft.Extensions.Hosting;
+using System;
+using System.Threading.Tasks;
+using Volo.Abp;
+
+namespace Volo.Abp.MultiTenancy;
+
+public class ConfigurationTenantResolveContributor : TenantResolveContributorBase
+{
+    public const string ContributorName = "Configuration";
+    public override string Name => ContributorName;
+
+    public override async Task ResolveAsync(ITenantResolveContext context)
+    {
+        var configuration = context.ServiceProvider.GetRequiredService<IConfiguration>();
+        var tenantIdOrName = configuration["MultiTenancy:Tenant"]; 
+
+        if (!tenantIdOrName.IsNullOrEmpty())
+        {
+            context.TenantIdOrName = tenantIdOrName;
+        }
+
+        await Task.CompletedTask;
+    }
+}

framework/src/Volo.Abp.MultiTenancy/Volo/Abp/MultiTenancy/ConfigurationTenantResolveOptionsExtensions.cs

@@ -0,0 +1,17 @@
+using System;
+using System.Collections.Generic;
+using System.Text;
+
+namespace Volo.Abp.MultiTenancy;
+
+public static class ConfigurationTenantResolveOptionsExtensions
+{
+    public static void AddConfigurationTenantResolver(
+        this AbpTenantResolveOptions options)
+    {
+        options.TenantResolvers.InsertAfter(
+            r => r is CurrentUserTenantResolveContributor,
+            new ConfigurationTenantResolveContributor()
+        );
+    }
+}