ECMAScript 2016/ES7 Approved (ecma-international.org) 

The Secret to Code Quality in 2016  

Office 2016 for Mac is here!

> dotnet new react

spa.UseReactDevelopmentServer(npmScript: "start");

spa.UseProxyToSpaDevelopmentServer("http://localhost:3000");

> create-react-app clientapp

> cd clientapp
> npm install --save bootstrap axios

 import "bootstrap/dist/css/bootstrap.css";

using Microsoft.AspNetCore.Mvc;

namespace DownloadFilesSample.Controllers
{
    [Route("api/[controller]")]
    public class ReportsController : Controller
    {
        [HttpGet("[action]")]
        public IActionResult GetPdfReport()
        {
            return File(virtualPath: "~/app_data/sample.pdf",
                        contentType: "application/pdf",
                        fileDownloadName: "sample.pdf");
        }
    }
}

  const getResults = async () => {
      const { headers, data } = await axios.get(apiUrl, {
        responseType: "blob"
      });
  }

import axios from "axios";
import React, { useEffect, useState } from "react";

export default function DisplayPdf() {
  const apiUrl = "https://localhost:5001/api/Reports/GetPdfReport";

  const [blobInfo, setBlobInfo] = useState({
    blobUrl: "",
    fileName: ""
  });

  useEffect(() => {
    getResults();
  }, []);

  const getResults = async () => {
    try {
      const { headers, data } = await axios.get(apiUrl, {
        responseType: "blob"
      });
      console.log("headers", headers);

      const pdfBlobUrl = window.URL.createObjectURL(data);
      console.log("pdfBlobUrl", pdfBlobUrl);

      const fileName = headers["content-disposition"]
        .split(";")
        .find(n => n.includes("filename="))
        .replace("filename=", "")
        .trim();
      console.log("filename", fileName);

      setBlobInfo({
        blobUrl: pdfBlobUrl,
        fileName: fileName
      });
    } catch (error) {
      console.log(error);
    }
  };

ontent-disposition: "attachment; filename=sample.pdf; filename*=UTF-8''sample.pdf"

import axios from "axios";
import React, { useEffect, useState } from "react";

export default function DisplayPdf() {

  // ...

  const { blobUrl } = blobInfo;

  return (
    <>
      <h1>Display PDF Files</h1>
      <button className="btn btn-info" onClick={handlePrintPdf}>
        Print PDF
      </button>
      <button className="btn btn-primary ml-2" onClick={handleShowPdfInNewTab}>
        Show PDF in a new tab
      </button>
      <button className="btn btn-success ml-2" onClick={handleDownloadPdf}>
        Download PDF
      </button>

      <section className="card mb-5 mt-3">
        <div className="card-header">
          <h4>using iframe</h4>
        </div>
        <div className="card-body">
          <iframe
            title="PDF Report"
            width="100%"
            height="600"
            src={blobUrl}
            type="application/pdf"
          ></iframe>
        </div>
      </section>

      <section className="card mb-5">
        <div className="card-header">
          <h4>using object</h4>
        </div>
        <div className="card-body">
          <object
            data={blobUrl}
            aria-label="PDF Report"
            type="application/pdf"
            width="100%"
            height="100%"
          ></object>
        </div>
      </section>

      <section className="card mb-5">
        <div className="card-header">
          <h4>using embed</h4>
        </div>
        <div className="card-body">
          <embed
            aria-label="PDF Report"
            src={blobUrl}
            type="application/pdf"
            width="100%"
            height="100%"
          ></embed>
        </div>
      </section>
    </>
  );
}

  const handlePrintPdf = () => {
    const { blobUrl } = blobInfo;
    if (!blobUrl) {
      throw new Error("pdfBlobUrl is null");
    }

    const iframe = document.createElement("iframe");
    iframe.style.display = "none";
    iframe.src = blobUrl;
    document.body.appendChild(iframe);
    if (iframe.contentWindow) {
      iframe.contentWindow.print();
    }
  };

const handleShowPdfInNewTab = () => {
    const { blobUrl } = blobInfo;
    if (!blobUrl) {
      throw new Error("pdfBlobUrl is null");
    }

    window.open(blobUrl);
  };

  const handleDownloadPdf = () => {
    const { blobUrl, fileName } = blobInfo;
    if (!blobUrl) {
      throw new Error("pdfBlobUrl is null");
    }

    const anchor = document.createElement("a");
    anchor.style.display = "none";
    anchor.href = blobUrl;
    anchor.download = fileName;
    document.body.appendChild(anchor);
    anchor.click();
  };

SELECT s.SalesOrderID,s.SalesOrderDetailID,s.OrderQty,
       LAST_VALUE(SalesOrderDetailID) OVER (PARTITION BY SalesOrderID
       ORDER BY SalesOrderDetailID)  LstValue
FROM Test_First_Last_Value s
     WHERE SalesOrderID IN (43670, 43669, 43667, 43663)
     ORDER BY s.SalesOrderID,s.SalesOrderDetailID,s.OrderQty     

SELECT s.SalesOrderID,s.SalesOrderDetailID,s.OrderQty,
       FITST_VALUE(SalesOrderDetailID) OVER (PARTITION BY SalesOrderID
       ORDER BY SalesOrderDetailID DESC) FstValue
FROM Test_First_Last_Value s
     WHERE SalesOrderID IN (43670, 43669, 43667, 43663)
     ORDER BY s.SalesOrderID,s.SalesOrderDetailID,s.OrderQty

SET STATISTICS IO ON;
GO
SET STATISTICS TIME ON;
GO

SELECT *
INTO [Sales].[Copy_Orders]
FROM [Sales].[Orders];
GO

SELECT
    [CustomerID],
    [OrderID],
    [OrderDate]
FROM [Sales].[Copy_Orders]
WHERE [CustomerID] > 550;
GO

(33035 rows affected)
Table 'Copy_Orders'. Scan count 1, logical reads 689, physical reads 0, read-ahead reads 0, lob logical reads 0, lob physical reads 0, lob read-ahead reads 0.

SQL Server Execution Times:
CPU time = 79 ms,  elapsed time = 762 ms.

CREATE NONCLUSTERED INDEX [IX_Copy_Orders_CustomerID]
ON [Sales].[Copy_Orders] (
[CustomerID]
)
INCLUDE (
[OrderID], [OrderDate]
);
GO

SELECT
    [CustomerID],
    [OrderID],
    [OrderDate]
FROM [Sales].[Copy_Orders]
WHERE [CustomerID] > 550;
GO

SELECT
    [CustomerID],
    [OrderID],
    [OrderDate]
FROM [Sales].[Orders]
WHERE [CustomerID] > 550;
GO

CREATE NONCLUSTERED INDEX [FK_Sales_Orders_CustomerID] ON [Sales].[Orders]
(
[CustomerID] ASC
)

SELECT
    [CustomerID],
    [OrderID],
    [OrderDate]
FROM [Sales].[Orders]

SELECT TOP 10
    [CustomerID],
    [OrderID],
    [OrderDate]
FROM [Sales].[Orders]
WHERE [CustomerID] > 550;

(10 rows affected)
Table 'Orders'. Scan count 1, logical reads 5, physical reads 0, read-ahead reads 510, lob logical reads 0, lob physical reads 0, lob read-ahead reads 0.

SELECT
    [CustomerID],
    [OrderID]
FROM [Sales].[Orders]
WHERE [OrderID] > 30000;

SELECT
    [CustomerID],
    [OrderID]
FROM [Sales].[Orders]
WHERE [OrderID] > 60000;

(43595 rows affected)
Table 'Orders'. Scan count 1, logical reads 191, physical reads 1, read-ahead reads 182, lob logical reads 0, lob physical reads 0, lob read-ahead reads 0.
 SQL Server Execution Times:
CPU time = 31 ms,  elapsed time = 754 ms.


(13595 rows affected)
Table 'Orders'. Scan count 1, logical reads 131, physical reads 0, read-ahead reads 127, lob logical reads 0, lob physical reads 0, lob read-ahead reads 0.
 SQL Server Execution Times:
CPU time = 16 ms,  elapsed time = 276 ms.