HTTP 身份验证和 SQL Server 报告服务

Question

我正在尝试使用 C#（.Net Core 控制台应用程序）将 SQL Server Reporting Services 报告导出为 PDF。如果我将以下内容直接粘贴到浏览器 URL 栏中，则 PDF 会成功保存到我的“下载”文件夹中：

https://MyServer:443/ReportServer?/MyReport&rs:Format=PDF&ReportParameter=Whatever

这是我用来尝试在 C# 中做同样事情的代码：

HttpClient client = new HttpClient();

var byteArray = Encoding.ASCII.GetBytes("MyUsername:MyPassword");
client.DefaultRequestHeaders.Authorization = new System.Net.Http.Headers.AuthenticationHeaderValue(
    "Basic", Convert.ToBase64String(byteArray));

var result = await client.GetAsync("https://MyServer:443/ReportServer?/MyReport&rs:Format=PDF&ReportParameter=Whatever);

Console.WriteLine(result.StatusCode);

return result;

结果是“未经授权”。我错过了什么？

Answer 1

您不需要使用基本身份验证来访问该 URL，而是应该使用 SSRS WebService 的 DefaultCredential

var theURL = "http://ReportServer/ReportServer_MYSERVER/Pages/ReportViewer.aspx?%2fPurchaseOrder&rs:Command=Render&OrderID=100&rs:ClearSession=true&rs:Format=PDF";

WebClient Client = new WebClient();
Client.UseDefaultCredentials = true;

byte[] myDataBuffer = Client.DownloadData(theURL);

您也可以使用 ReportExecution2005 网络服务下载 PDF。这是一个例子：

https://docs.microsoft.com/en-us/dotnet/api/reportexecution2005.reportexecutionservice.render?redirectedfrom=MSDN&view=sqlserver-2016#ReportExecution2005_ReportExecutionService_Render_System_String_System_String_System_String__System_String__System_String__ReportExecution2005_Warning____System_String____

1. 在项目下 --> 添加服务参考 -> 高级 -> 添加 Web 参考 -> URL：http:////reportexecution2005.asmx 并将其命名为 ReportExecution2005。
2. 使用以下代码创建方法

ReportExecutionService rsExec = new ReportExecutionService();
rsExec.Credentials = System.Net.CredentialCache.DefaultCredentials;
rsExec.Url = "http://<My Server Name>/<My Report Server Name>/reportexecution2005.asmx";

string historyID = null;
string reportPath = "/<My Folder Name>/<My SSRS Report Name>";
rsExec.LoadReport(reportPath, historyID);

GetProperteriesSample.ReportExecution2005.ParameterValue[] executionParams;
executionParams = new GetProperteriesSample.ReportExecution2005.ParameterValue[1];
executionParams[0] = new GetProperteriesSample.ReportExecution2005.ParameterValue();
executionParams[0].Name = "My Parameter Name";
executionParams[0].Value = "My Parameter Value";
new GetProperteriesSample.ReportExecution2005.ParameterValue();

rsExec.SetExecutionParameters(executionParams, "en-us");

string deviceInfo = null;
string extension;
string encoding;
string mimeType;
GetProperteriesSample.ReportExecution2005.Warning[] warnings = null;
string[] streamIDs = null;
string format = "PDF";

Byte[] results = rsExec.Render(format, deviceInfo, out extension, out mimeType, out encoding, out warnings, out streamIDs);
FileStream stream = File.OpenWrite("c:\\My Destination Folder Name>\\<My PDF Report Name>.pdf");
stream.Write(results, 0, results.Length);
stream.Close();