转： 如何向WebForm下的ReportViewer传递身份凭证

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

 

WebForm下的ReportViewer控件不能直接传入身份凭证，因为其ServerReport.ReportServerCredentials.NetworkCredentials属性是只读的。

在骚扰了N个.NET MVP后，终于知道有一个接口叫IReportServerCredentials，诶，我怎么把这茬忘了呢。报表服务中定制化身份验证方式的就靠它了。

既然是接口，那么我们就要先利用这个接口创建一个类，然后类中实现这个接口的成员。IReportServerCredentials接口主要是两个成员属性(ImpersonateUser和NetworkCredentials)和一个成员方法(GetFormCredentials)。

ImpersonateUser在我们这儿没什么多大用处，哈，所以直接return null。NetworkCredentials就是我们需要返回的，所以return new NetworkCredential(_username, _password, _domain)。

那么_username、_password、_domain哪儿来的呢，类里面放三个Private的变量，然后通过类的初始化方法传进去就行了啊。

这样就搞定了阿。下面是类的源代码和调用类的源代码：

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;
        }

    }
}