支持多数据库。报表可以定义使用的数据库，使用myjs.GetDAta方法获取数据。

ReportService/Controllers/api/ReportApiController.cs

@@ -1,13 +1,12 @@
 using System;
 using System.Collections.Generic;
 using System.IO;
-using Falcon.StoredProcedureRunner;
 using Microsoft.AspNetCore.Hosting;
 using Microsoft.AspNetCore.Mvc;
-using Microsoft.EntityFrameworkCore.Internal;
 using Microsoft.Extensions.Logging;
 using ReportService.Database;
 using ReportService.Models;
+using ReportService.Models.ReportApi;
 
 namespace ReportService.Controllers.api
 {
@@ -16,9 +15,8 @@ namespace ReportService.Controllers.api
     public class ReportApiController:Controller
     {
         public IWebHostEnvironment Env { get; private set; }
-        public RSDbContext Db { get; set; }
         public ILogger Logger { get; set; }
-        public IRunner DbRunner { get; set; }
+        public DbContextFactory DbFactory { get; set; }
 
         /// <summary>
         /// 报表存放位置
@@ -29,11 +27,10 @@ namespace ReportService.Controllers.api
             }
         }
 
-        public ReportApiController(ILogger<ReportApiController> logger,IWebHostEnvironment env,RSDbContext db,IRunner r) {
+        public ReportApiController(ILogger<ReportApiController> logger,IWebHostEnvironment env,DbContextFactory dbFactory) {
             this.Logger = logger;
             this.Env = env;
-            this.Db = db;
+            this.DbFactory = dbFactory;
-            this.DbRunner = r;
         }
 
         /// <summary>
@@ -123,8 +120,19 @@ namespace ReportService.Controllers.api
         /// <param name="sql">要执行的sql语句</param>
         /// <returns>json对象</returns>
         public object GetResult(string sql) {
-            var result = this.DbRunner.RunRaw(this.Db,sql);
+            return GetData(new GetDataData {
-            this.Logger.LogInformation($"GetResult:\n{sql}\n{result}");
+                DbName = "ReportService",
+                Sql = sql,
+            });
+        }
+        /// <summary>
+        /// 从数据请求数据。
+        /// </summary>
+        /// <param name="data">请求数据模型</param>
+        /// <returns>返回json格式数据</returns>
+        public object GetData([FromBody]GetDataData data) {
+            var result = this.DbFactory.RunRawSql(data.DbName,data.Sql);
+            this.Logger.LogInformation($"GetData:\n{data.Sql}\n{result}");
             return Content(result,"application/json; charset=utf-8");
         }
 

ReportService/Database/DbContextFactory.cs

@@ -0,0 +1,61 @@
+using System;
+using System.Collections.Generic;
+using Falcon.StoredProcedureRunner;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.Extensions.Configuration;
+
+namespace ReportService.Database
+{
+    /// <summary>
+    /// 数据库上下文工厂
+    /// </summary>
+    public class DbContextFactory
+    {
+        /// <summary>
+        /// 数据库上下文集合
+        /// </summary>
+        public Dictionary<string,DbContextOptions> List { get; set; } = new();
+        /// <summary>
+        /// 数据库执行器
+        /// </summary>
+        public IRunner DbRunner { get; set; }
+
+        /// <summary>
+        /// 通过提供配置节点实例化数据库上下文工厂
+        /// </summary>
+        /// <param name="config">配置节点</param>
+        /// <param name="runner">数据库语句执行器</param>
+        public DbContextFactory(IConfigurationSection config,IRunner runner) {
+            foreach(var item in config.GetChildren()) {
+                DbContextOptionsBuilder builder = new();
+                builder.UseSqlServer(item.Value);
+                this.List.Add(item.Key,builder.Options);
+            }
+            this.DbRunner = runner;
+        }
+        /// <summary>
+        /// 获取数据库上下文
+        /// </summary>
+        /// <param name="name">节点定义的数据库名称</param>
+        /// <returns>数据上下文</returns>
+        public DbContext GetContext(string name) {
+            if(List.TryGetValue(name,out var option)) {
+                return new DbContext(option);
+            }
+            throw new Exception("使用的数据库名称错误！");
+        }
+
+        /// <summary>
+        /// 在指定数据库上执行原始sql语句并返回json格式数据。注意防止sql注入攻击
+        /// </summary>
+        /// <param name="dbName">数据库名称</param>
+        /// <param name="sql">要执行的sql语句</param>
+        /// <returns>json格式的数据库返回数据</returns>
+        public string RunRawSql(string dbName,string sql) {
+            if(this.DbRunner == null) {
+                throw new Exception("执行器注册错误，没有实例化IRunner执行器");
+            }
+            return this.DbRunner.RunRaw(GetContext(dbName),sql);
+        }
+    }
+}

ReportService/Database/DbContextFactoryServiceCollectionEx.cs

@@ -0,0 +1,27 @@
+using Falcon.StoredProcedureRunner;
+using Microsoft.Extensions.Configuration;
+using Microsoft.Extensions.DependencyInjection;
+
+namespace ReportService.Database
+{
+    /// <summary>
+    /// 数据上下文工厂服务集合扩展
+    /// </summary>
+    public static class DbContextFactoryServiceCollectionEx
+    {
+        /// <summary>
+        /// 注册数据库工厂
+        /// </summary>
+        /// <param name="services">服务集合</param>
+        /// <param name="sectionKey">配置文件节点</param>
+        /// <returns>服务集合</returns>
+        public static IServiceCollection AddDbContextFactory(this IServiceCollection services,string sectionKey) {
+            services.AddSingleton(sp => {
+                var section = sp.GetService<IConfiguration>().GetSection(sectionKey);
+                var runner = sp.GetService<IRunner>();
+                return new DbContextFactory(section,runner);
+            });
+            return services;
+        }
+    }
+}

ReportService/Database/RSDbContext.cs

@@ -1,14 +0,0 @@
-using Microsoft.EntityFrameworkCore;
-
-namespace ReportService.Database
-{
-    /// <summary>
-    /// 报表服务数据库
-    /// </summary>
-    public partial class RSDbContext:DbContext
-    {
-        public RSDbContext(DbContextOptions options) : base(options) {
-        }
-
-    }
-}

ReportService/Models/ReportApi/GetDataData.cs

@@ -0,0 +1,17 @@
+namespace ReportService.Models.ReportApi
+{
+    /// <summary>
+    /// 请求数据模型
+    /// </summary>
+    public class GetDataData
+    {
+        /// <summary>
+        /// 要请求数据的数据库
+        /// </summary>
+        public string DbName { get; set; }
+        /// <summary>
+        /// 要执行的查询语句
+        /// </summary>
+        public string Sql { get; set; }
+    }
+}

ReportService/ReportService.csproj

@@ -33,7 +33,4 @@
       <CopyToOutputDirectory>Never</CopyToOutputDirectory>
     </Content>
   </ItemGroup>
-  <ItemGroup>
-    <Folder Include="Database\" />
-  </ItemGroup>
 </Project>

ReportService/Startup.cs

@@ -21,10 +21,9 @@ namespace ReportService
         // This method gets called by the runtime. Use this method to add services to the container.
         public void ConfigureServices(IServiceCollection services) {
 
-            var connStr = this.Configuration.GetValue<string>("Database:ReportService");
+            //注册数据上下文工厂
-            services.AddDbContext<RSDbContext>(b => {
+            services.AddDbContextFactory("Database");
-                b.UseSqlServer(connStr);
+
-            });
             //引入存储过程执行器
             services.AddFalconSPRunner();
 

ReportService/appsettings.json

@@ -8,7 +8,8 @@
   },
   "AllowedHosts": "*",
   "Database": {
-    "ReportService": "Server=.\\SQLSERVER2008R2;Database=EASY_HEALTHRECORDS;User ID=sa;Password=111"
+    "ReportService": "Server=.\\SQLSERVER2008R2;Database=EASY_HEALTHRECORDS;User ID=sa;Password=111",
+    "test": "Server=.\\SQLSERVER2008R2;Database=EASY_HEALTHRECORDS;User ID=sa;Password=111"
   },
   "urls": "http://*:9000;https://*:9001"
 }

ReportService/wwwroot/js/site.js

@@ -6,6 +6,7 @@ var myjs = {
         fileContentUrl: "/api/ReportApi/GetHtml",
         reportUrl: "/api/ReportApi/GetPrint",
         getresult: "/api/ReportApi/GetResult",
+        getData: "/api/ReportApi/GetData",
         GetServerTime: "/api/ReportApi/GetServerTime",
     },
     //定义从对象获取请求参数的方法
@@ -56,6 +57,27 @@ var myjs = {
             .then(sc)
             .catch(ec);
     },
+    //从数据库获取数据。
+    getData(dbName, sql, sc, ec) {
+        if (!ec) {
+            ec = function (e) {
+                console.log(e);
+                alert(e);
+            };
+        }
+        if (!sc) {
+            sc = function (d) { console.log(d); };
+        }
+        var url = this.urls.getData;
+        var rd = { DbName: dbName, Sql: sql, };
+        fetch(url, {
+            method: 'POST',
+            body: JSON.stringify(rd),
+            headers: new Headers({
+                'Content-Type': 'application/json'
+            })
+        }).then(res => res.json()).catch(ec).then(sc);
+    },
     //提示消息并记录
     showmsg(msg) {
         console.log(msg);