使用GET方式下載PDF文件

示例代碼：

using System;namespace ConsoleApp2 {class Program{static void Main(string[] args){System.Net.Http.HttpClient httpClient = new System.Net.Http.HttpClient();httpClient.BaseAddress = new Uri("https://dms.esnadexpress.com/");System.Net.Http.HttpRequestMessage httpRequestMessage = new System.Net.Http.HttpRequestMessage();httpRequestMessage.Method = new System.Net.Http.HttpMethod("GET");httpRequestMessage.Headers.Add("context-type", "application/pdf");httpRequestMessage.RequestUri = new Uri("https://dms.esnadexpress.com/img/2019-07-16/2/custom_pdf_ESNAD_1563242468479_54981_3223fe36-31c3-4d73-b447-d2c4720046fa.pdf");System.Net.Http.HttpResponseMessage httpResponseMessage = httpClient.SendAsync(httpRequestMessage).Result;if (httpResponseMessage.StatusCode == System.Net.HttpStatusCode.OK){System.IO.Stream stream = httpResponseMessage.Content.ReadAsStreamAsync().Result;using (System.IO.FileStream fs = new System.IO.FileStream("e:\\download.pdf",System.IO.FileMode.CreateNew)){byte[] buffer = new byte[stream.Length];stream.Read(buffer, 0, buffer.Length);fs.Write(buffer, 0, buffer.Length);}}}} }

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總結

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