轉： 如何向WebForm下的ReportViewer傳遞身份憑證

轉自：http://space.itpub.net/9079672/viewspace-416169

 

WebForm下的ReportViewer控制項不能直接傳入身份憑證，因為其ServerReport.ReportServerCredentials.NetworkCredentials屬性是唯讀。

在騷擾了N個.NET MVP後，終於知道有一個介面叫IReportServerCredentials，誒，我怎麼把這茬忘了呢。報表格服務中定製化身分識別驗證方式的就靠它了。

既然是介面，那麼我們就要先利用這個介面建立一個類，然後類中實現這個介面的成員。IReportServerCredentials介面主要是兩個成員屬性(ImpersonateUser和NetworkCredentials)和一個成員方法(GetFormCredentials)。

ImpersonateUser在我們這兒沒什麼多大用處，哈，所以直接return null。NetworkCredentials就是我們需要返回的，所以return new NetworkCredential(_username, _password, _domain)。

那麼_username、_password、_domain哪兒來的呢，類裡面放三個Private的變數，然後通過類的初始化方法傳進去就行了啊。

這樣就搞定了阿。下面是類的原始碼和調用類的原始碼：

using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;

using System.Net;
using System.Web.SessionState;
using System.Security.Principal;
using System.Collections.Generic;

using Microsoft.Reporting.WebForms;

public partial class ReportViewer : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
       
        rptViewer.ProcessingMode = ProcessingMode.Remote;
       
        rptViewer.ServerReport.ReportServerUrl = new Uri("http://Server Name/ReportServer");
        rptViewer.ServerReport.ReportPath = "/Testing/EmployeeList";

        ReportViewerCredentials.MyReportViewerCredential rvc=new ReportViewerCredentials.MyReportViewerCredential("user","password","");
        rptViewer.ServerReport.ReportServerCredentials = rvc;
            //new System.Net.NetworkCredential("reportuser", "userreport");

        DataSourceCredentials dataSource = new DataSourceCredentials();
        dataSource.Name="Data Source Name";
        dataSource.UserId="UserID";
        dataSource.Password="Password";

        rptViewer.ServerReport.SetDataSourceCredentials(new DataSourceCredentials[] { dataSource });

        List<ReportParameter> paramList = new List<ReportParameter>();
        paramList.Add(new ReportParameter("Emp_No", " ", false));
        paramList.Add(new ReportParameter("Birth_Date_From", "1980-01-01", false));
        paramList.Add(new ReportParameter("Birth_Date_To", "1982-01-01", false));

        this.rptViewer.ServerReport.SetParameters(paramList);        
    }
}

public class ReportViewerCredentials
{
public class MyReportViewerCredential : IReportServerCredentials
{
    private string _username;
    private string _password;
    private string _domain;

    public Uri ReportServerUrl;

    public MyReportViewerCredential(string username, string password, string domain)
    {
        _username = username;
        _password = password;
        _domain = domain;
    }

    public WindowsIdentity ImpersonationUser
    {
        get { return null; }
    }

    public System.Net.ICredentials NetworkCredentials
    {
        get
        {
            return new NetworkCredential(_username, _password, _domain);
        }
    }

    public bool GetFormsCredentials(out Cookie authCookie,
                                    out string user,
                                    out string password,
                                    out string authority)
        {
            authCookie = null;
      user = _username;
            password = _password;
            authority = _domain;
      return false;
        }

    }
}