Distribute Permission Instance (EventHandler)

SharePoint的EventHandler主要有Web Level，List Level，List Item Level，Email几种。SharePoint的event handler主要是继承SPWebEventReceiver, SPEmailEventReceiver, SPListEventReceiver和SPItemEventReceiver类去实现其中相应的方法来完成我们的需求。

ModifiedPermissions:

using System;
using System.Collections.Generic;
using System.Text;
using Microsoft.SharePoint;
using Microsoft.SharePoint.Administration;
using System.IO;

namespace Anson.EventReceiver
{
    public class ModifiedPermission:SPItemEventReceiver
    {

        string strGroupName = "Home Owners";
        public override void ItemAdded(SPItemEventProperties properties)
        {
            SPWeb myWeb = null;
            SPSite mySite = null;            
            try
            {
                SPSecurity.RunWithElevatedPrivileges(delegate()
                {
                    mySite = new SPSite(properties.ListItem.Web.Site.ID);
                    myWeb = mySite.AllWebs[properties.ListItem.Web.ID];
                    string currentUser = properties.ListItem.Web.CurrentUser.LoginName;
                    SPListItem myListItem = myWeb.Lists[properties.ListId].GetItemById(properties.ListItemId);
                    myWeb.AllowUnsafeUpdates = true;
                    myListItem.BreakRoleInheritance(true);

                    //Clear new listItem all the RoleAssignment 
                    while (myListItem.RoleAssignments.Count>0)
                    {
                        myListItem.RoleAssignments.Remove(0);
                    }

                    //Add Home Owner Group RoleAssignment
                    SPGroup oOwnerGroup=myWeb.SiteGroups[strGroupName];
                    if (oOwnerGroup!=null)
                    {
                        SPRoleAssignment oRoleGroup = new SPRoleAssignment(oOwnerGroup);
                        oRoleGroup.RoleDefinitionBindings.Add(myWeb.RoleDefinitions["Full Control"]);
                        myListItem.RoleAssignments.Add(oRoleGroup);
                    }
                    //Add  Author RoleAssignment
                    SPRoleAssignment authorRoleAssignment = new SPRoleAssignment(myWeb.SiteUsers[currentUser]);
                    authorRoleAssignment.RoleDefinitionBindings.Add(myWeb.RoleDefinitions["Full Control"]);
                    myListItem.RoleAssignments.Add(authorRoleAssignment);

                    myWeb.Update();
                    myWeb.AllowUnsafeUpdates = false;
                    
                });
            }
            catch (Exception ex)
            {

                log(ex.Message);
            }
            
        }
        public override void ItemDeleting(SPItemEventProperties properties)
        {
       
            try
            {
                
                string oCurrentUser = properties.ListItem.Web.CurrentUser.Name;

                string authorName = properties.ListItem["Created By"].ToString();
                authorName = authorName.Substring(authorName.IndexOf(";#") + 2);
                if (oCurrentUser != authorName)
                {
                    properties.Cancel = true;
                    properties.ErrorMessage = "You have not enough permission to delete!";
                }
            }
            catch (Exception ex)
            {
                log("ItemDeleting Method Error Message:"+ex.Message+DateTime.Now.ToString());
            }
        }
        private  void log(string ErrorMessage)
        {
            FileStream FS = null;
            StreamWriter SW = null;
            try
            {
                SPSecurity.RunWithElevatedPrivileges
                    (
                    delegate
                    {
                        FS = File.Open("c:\\Error.txt", FileMode.Append);
                        SW = new StreamWriter(FS);
                        SW.Write(ErrorMessage+"\r\n");
                        SW.Close();
                        SW.Dispose();
                        FS.Close();
                        FS.Dispose();
                    }
                    );
            }
            catch
            {
            }
            finally
            {
                SW = null;
                FS = null;
            }

        }

    }
}

 

 

EventReceiveManger.cs ---这个是添加移动EventReceiver的管理类

using System;
using System.Collections.Generic;
using System.Text;
using Microsoft.SharePoint;
using Microsoft.SharePoint.Administration;
using System.IO;

namespace Anson.EventReceiver
{
    class EventReceiverManager
    {
       
        public static bool SetEventReceiver(SPList list,Type t,params SPEventReceiverType[] eventType)
        {
            
            try
            {
                string assembly = t.Assembly.FullName;
                string className = t.FullName;
                SPEventReceiverDefinitionCollection ERCollection = list.EventReceivers;
                SPEventReceiverDefinition def = null;
                for (int i = 0; i < ERCollection.Count; i++)
                {
                    def = ERCollection[i];
                    if (def.Class==className)
                    {
                        def.Delete();
                    }
                }
          
                foreach (SPEventReceiverType ET in eventType)
                {
                    list.EventReceivers.Add(ET, assembly, className);

                }
                list.Update();
                return true;
            
            }
            catch (Exception ex)
            {
                log("SetEventReceiverError:" + ex.Message + "\r\n");
                return false;
            }            
        }

        public static bool RemoveEventReceivers(SPList list ,Type t)
        {
            try
            {
                string assembly = t.Assembly.FullName;
                string className = t.FullName;
                SPEventReceiverDefinitionCollection ERCollection = list.EventReceivers;
     SPEventReceiverDefinition def = null;
                for (int i = 0; i < ERCollection.Count; i++)
                {
                    def = ERCollection[i];
                    if (def.Class==className)
                    {
                        def.Delete();
                    }
                }
                list.Update();
                return true;
            }
            catch (Exception ex)
            {

                log("RemoveEventReceivrs Method Error:"+ex.Message+"\r\n");
                return false;
            }

        }


        #region Log Method
        public static void log(string ErrorMessage)
        {
            FileStream FS = null;
            StreamWriter SW = null;
            try
            {
                SPSecurity.RunWithElevatedPrivileges
                    (
                    delegate
                    {
                        FS = File.Open("c:\\Error.txt", FileMode.Append);
                        SW = new StreamWriter(FS);
                        SW.Write(ErrorMessage + "\r\n");
                        SW.Close();
                        SW.Dispose();
                        FS.Close();
                        FS.Dispose();
                    }
                    );
            }
            catch
            {
            }
            finally
            {
                SW = null;
                FS = null;
            }
        }        
        #endregion
    }
    
}

 

EventReceiverInstall.cs --这个是安装Feature的类

using System;
using System.Collections.Generic;
using System.Text;
using Microsoft.SharePoint;
using Microsoft.SharePoint.Administration;


namespace Anson.EventReceiver
{
    class EventReceiverInstall:SPFeatureReceiver
    {
        string CustomListName = "AnsonList";
        public override void FeatureActivated(SPFeatureReceiverProperties properties)
        {
            SPSite mySite = properties.Feature.Parent as SPSite;
            SPList myList = mySite.RootWeb.Lists[CustomListName];
            SPEventReceiverType[] types={SPEventReceiverType.ItemDeleting,SPEventReceiverType.ItemAdded};
            if (myList!=null)
            {
                EventReceiverManager.SetEventReceiver(myList,
                    typeof(ModifiedPermission), types);
            }
            else
            {
                return;
            }
        }

        public override void FeatureDeactivating(SPFeatureReceiverProperties properties)
        {
            SPSite mySite = properties.Feature.Parent as SPSite;
            SPList myList = mySite.RootWeb.Lists[CustomListName];
            if (myList != null)
            {
                EventReceiverManager.RemoveEventReceivers(myList, typeof(ModifiedPermission));
            }
            else
            {
                return;
            }

        }

        public override void FeatureInstalled(SPFeatureReceiverProperties properties)
        {
            
        }

        public override void FeatureUninstalling(SPFeatureReceiverProperties properties)
        {
            
        }
    }
}

 

 

Feature.xml  -- 这个是Feature类似的结构，也有其他的结构写法，我习惯用这种

<?xml version="1.0" encoding="utf-8"?>
<Feature Scope="Site"
  Title="Anson.EventReceiver ModifedPermission"
  Id="615208F2-85DD-42c5-9590-1F9B0BC725B0" Description="It is Created by Ansom ,Use in the list of AnsonList"
  xmlns="http://schemas.microsoft.com/sharepoint/"
 Hidden="FALSE"
 Version="1.0.0.0"
 ReceiverAssembly="Anson.EventReceiver, Version=1.0.0.0, Culture=neutral, PublicKeyToken=5abfd538ff01cc7c"
 ReceiverClass="Anson.EventReceiver.EventReceiverInstall">
</Feature>

 

部署：

1. 强命名。

2. DLL文件放到GAC

3.重启IIS， command: iisreset

3. 把含 Feature.xml文件的文件夹DistributePermission放到  12\TEMPLATE\FEATURES文件件里

4.安装Feature, Stsadm Command: stsadm -o installfeature -name DistributePermission

5.激活Feature