在訪問遠程報表時，遇到了權限問題。因爲Sharepoint服務器和報表服務器分別在不同機器上。在Sharepoint服務器上運行一切正常，但從其他機器訪問就報沒有權限。
又是典型的double hop。
基本思想是在報表服務器上建一個報表專用賬戶，讓Sharepoint服務器以該用戶的身份調用報表服務。
客戶端 -〉（用戶真實身份） -〉SharePoint服務器 -〉（模擬報表專用賬戶身份）-〉SQL 2005報表服務器
一、使用web service訪問的處理方法
處理比較簡單，在創建web service proxy類時，模擬模擬報表專用賬戶。
public ReportAdapter(string serverURL,string path)
{
ReportSvr = new ReportingServer.ReportingService();
ReportSvr.Credentials = new System.Net.NetworkCredential("user", "pwd", "domain");
.....
後面的代碼不變
}
二、使用ReportViewer控件的處理方法
使用ReportViewer控件時會麻煩很多。首先，我們不能直接用System.Net.NetworkCredential，必須自己實現一個接口Microsoft.Reporting.WebForms.IReportServerCredentials。
不過網上有很多現成的代碼，也不需要自己寫了。
using System;
using System.Data;
using System.Configuration;
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;
/// <summary>
/// Summary description for CustomReportCredentials
/// </summary>
[Serializable]
public class CustomReportCredentials : Microsoft.Reporting.WebForms.IReportServerCredentials
{
// local variable for network credential.
private string _UserName;
private string _PassWord;
private string _DomainName;
public CustomReportCredentials(string UserName, string PassWord, string DomainName)
{
_UserName = UserName;
_PassWord = PassWord;
_DomainName = DomainName;
}
public System.Security.Principal.WindowsIdentity ImpersonationUser
{
get
{
return null; // not use ImpersonationUser
}
}
public System.Net.ICredentials NetworkCredentials
{
get
{
// use NetworkCredentials
return new System.Net.NetworkCredential(_UserName, _PassWord, _DomainName);
}
}
public bool GetFormsCredentials(out System.Net.Cookie authCookie, out string user, out string password, out string authority)
{
// not use FormsCredentials unless you have implements a custom autentication.
authCookie = null;
user = password = authority = null;
return false;
}
}
需要注意[Serializable]，因爲我的頁面設置EnableSessionState="True"，所有的數據都需要可以序列化。
有了類CustomReportCredentials，下面的事情就簡單了
protected void ButtonViewReport_Click(object sender, EventArgs e)
{
DateTime StartDate = System.Convert.ToDateTime(TextBoxStartDate.Value);
DateTime EndDate = System.Convert.ToDateTime(TextBoxEndDate.Value);
ReportParameter[] Parameters = new ReportParameter[2];
Parameters[0] = new ReportParameter("startdate", StartDate.ToShortDateString());
Parameters[1] = new ReportParameter("enddate", EndDate.ToShortDateString());
try
{
ReportViewer1.ServerReport.ReportServerUrl = new Uri("http://ctc-bar:81/reportserver");
ReportViewer1.ServerReport.ReportPath = "/BARReports/EBCdetaillist";
ReportViewer1.ServerReport.ReportServerCredentials = new CustomReportCredentials("user", "pwd)", "domain");
ReportViewer1.ServerReport.SetParameters(Parameters);
}
catch (Microsoft.Reporting.WebForms.ReportSecurityException ex)
{
Response.Write(ex.Message);
}
catch (Exception ex2)
{
Response.Write(ex2.Message);
}
}
很奇怪，在設置ReportServerCredentials前，要對 ReportViewer1.ServerReport.ReportServerUrl和ReportViewer1.ServerReport.ReportPath賦值。但我明明已經在ReportViewer1的設計器中設了這兩個值。
如果不設置ReportServerCredentials，則不需要這樣。