如何向WebForm下的ReportViewer传递身份凭证

IReportServerCredentials

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，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。

下面是类的源代码和调用类的源代码：

/********************************************************************************
MyReportViewerCredential类
********************************************************************************/
using System;
using System.Net;
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 Microsoft.Reporting.WebForms;
using System.Web.SessionState;
using System.Security.Principal;

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;
        }

    }
}

/********************************************************************************
调用MyReportViewerCredential类
********************************************************************************/
protected void TreeViewNavigator_SelectedNodeChanged(object sender, EventArgs e)
    {
        ReportViewerCredentials.MyReportViewerCredential rvc = new ReportViewerCredentials.MyReportViewerCredential
            (Session["UserName"].ToString(), Session["Password"].ToString(), Session["Domain"].ToString());
        ReportViewerMain.ServerReport.ReportServerCredentials = rvc;
        ReportViewerMain.ServerReport.ReportPath = TreeViewNavigator.SelectedNode.Value.ToString();
    }