diff --git a/app/controllers/attachments_controller.rb b/app/controllers/attachments_controller.rb
index af96d9c6..c234eb17 100644
--- a/app/controllers/attachments_controller.rb
+++ b/app/controllers/attachments_controller.rb
@@ -161,7 +161,13 @@ class AttachmentsController < ApplicationController
   end
 
   def autocomplete
-    @project = Project.find_by_id(params[:project_id])
+    # modify by nwb
+    if params[:project_id]
+      @project = Project.find_by_id(params[:project_id])
+    elsif params[:course_id]
+      @course = Course.find_by_id(params[:course_id])
+    end
+
     respond_to do |format|
       format.js
     end
diff --git a/app/helpers/attachments_helper.rb b/app/helpers/attachments_helper.rb
index aa6a5f7f..3e61b2a4 100644
--- a/app/helpers/attachments_helper.rb
+++ b/app/helpers/attachments_helper.rb
@@ -115,7 +115,7 @@ module AttachmentsHelper
 
     s = content_tag('div', attachments_check_box_tags('attachment[attach][]', searched_attach), :id => 'attachments')
     links = pagination_links_full(@obj_pages, @obj_count, :per_page_links => false) {|text, parameters, options|
-      link_to text, attachments_autocomplete_path( parameters.merge(:q => params[:q], :format => 'js')), :remote => true }
+      link_to text, attachments_autocomplete_path( parameters.merge(:project_id=>project.id,:q => params[:q], :format => 'js')), :remote => true }
 
     return s + content_tag('div', content_tag('ul', links), :class => 'pagination')
 
@@ -133,6 +133,35 @@ module AttachmentsHelper
     # return searched_attach.to_json
   end
 
+  # add by nwb
+  def render_attachments_for_new_course(course, limit=nil)
+    # 查询条件
+    params[:q] ||= ""
+    filename_condition = params[:q].strip
+
+    attachAll = Attachment.scoped
+
+    # 除去当前课程的所有资源
+    nobelong_attach = Attachment.where("!(container_type = '#{course.class}' and container_id = #{course.id})") unless course.blank?
+
+    # 搜索域确定
+    domain = course.nil? ? attachAll : nobelong_attach
+
+    # 搜索到的资源
+    searched_attach = domain.where("filename LIKE :like ", like:"%#{filename_condition}%").limit(limit).order('created_on desc')
+    searched_attach = private_filter searched_attach
+    searched_attach = paginateHelper(searched_attach, 10)
+
+    #testattach = Attachment.public_attachments
+
+    s = content_tag('div', attachments_check_box_tags('attachment[attach][]', searched_attach), :id => 'attachments')
+    links = pagination_links_full(@obj_pages, @obj_count, :per_page_links => false) {|text, parameters, options|
+      link_to text, attachments_autocomplete_path( parameters.merge(:course_id=>course.id,:q => params[:q], :format => 'js')), :remote => true }
+
+    return s + content_tag('div', content_tag('ul', links), :class => 'pagination')
+
+  end
+
   def attachments_check_box_tags(name, attachs)
     s = ''
     attachs.each do |attach|
@@ -144,18 +173,22 @@ module AttachmentsHelper
   def private_filter resultSet
     result = resultSet.to_a.dup
 
+    # modify by nwb
+    #添加对课程资源文件的判断
     resultSet.map { |res|
       if(res.container.nil? || 
         (res.container.class.to_s=="Project" && res.container.is_public == false) ||
-        (res.container.has_attribute?(:project) && res.container.project.is_public == false) ||
+        (res.container.has_attribute?(:project) && res.container.project && res.container.project.is_public == false) ||
         (res.container.class.to_s=="HomeworkAttach" && res.container.bid.reward_type == 3) ||
-        false
+          (res.container.class.to_s=="Course" && res.container.is_public == false) ||
+          (res.container.has_attribute?(:course) && res.container.course && res.container.course.is_public == false)
         )
         result.delete(res)
       end
     }
     result
   end
+
   include Redmine::Pagination
   def paginateHelper obj, pre_size=10
     @obj_count = obj.count
diff --git a/app/models/attachment.rb b/app/models/attachment.rb
index 53b2e987..116e2de9 100644
--- a/app/models/attachment.rb
+++ b/app/models/attachment.rb
@@ -68,6 +68,106 @@ class Attachment < ActiveRecord::Base
   before_save :be_user_score # user_score
   after_destroy :delete_from_disk
 
+  # add by nwb
+  # 获取所有可公开的资源文件列表
+  scope :public_attachments, lambda {
+    #joins(Project.table_name).where("container_type = 'Project' and ")
+    joins("LEFT JOIN #{Project.table_name} ON #{Attachment.table_name}.container_type='Project' AND #{Project.table_name}.id = #{Attachment.table_name}.container_id and #{Project.table_name}.is_public=1 " +
+              " LEFT JOIN #{Document.table_name} ON #{Attachment.table_name}.container_type='Project' AND #{Document.table_name}.project_id in "+self.public_project_id +
+              " LEFT JOIN #{Issue.table_name} ON #{Attachment.table_name}.container_type='Project' AND #{Issue.table_name}.project_id in "+self.public_project_id +
+              " LEFT JOIN #{Version.table_name} ON #{Attachment.table_name}.container_type='Project' AND #{Version.table_name}.project_id in "+self.public_project_id +
+              " LEFT JOIN #{WikiPage.table_name} ON #{Attachment.table_name}.container_type='WikiPage' AND #{WikiPage.table_name}.parent_id in "+self.public_wiki_id +
+              " LEFT JOIN #{Message.table_name} ON #{Attachment.table_name}.container_type='Message' AND #{Message.table_name}.parent_id in "+self.public_board_id +
+              " LEFT JOIN #{Course.table_name} ON #{Attachment.table_name}.container_type='Course' AND #{Course.table_name}.is_public=1 " +
+              " LEFT JOIN #{News.table_name} ON #{Attachment.table_name}.container_type='News' AND (#{News.table_name}.project_id in "+self.public_project_id + " OR #{News.table_name}.course_id in " + self.public_course_id + ")" +
+              " LEFT JOIN #{HomeworkAttach.table_name} ON #{Attachment.table_name}.container_type='HomeworkAttach' AND #{HomeworkAttach.table_name}.bid_id in "+self.public_bid_id)
+  }
+
+  # add by nwb
+  # 公开的项目id列表
+  def self.public_project_id
+    idlist = "("
+    projects=Project.all_public
+    count = projects.count
+    for i in 0...count
+      project = projects[i]
+      idlist+="'" + project.id.to_s + "'"
+      if i != count-1
+        idlist+=","
+      end
+    end
+    idlist += ")"
+    idlist
+  end
+
+  # add by nwb
+  # 公开的课程id列表
+  def self.public_course_id
+    idlist = "("
+    courses=Course.all_public
+    count = courses.count
+    for i in 0...count
+      course = courses[i]
+      idlist+="'" + course.id.to_s + "'"
+      if i != count-1
+        idlist = idlist + ","
+      end
+    end
+    idlist += ")"
+    idlist
+  end
+
+  # add by nwb
+  # 公开的wiki id列表
+  def self.public_wiki_id
+    idlist = "("
+    wikis=Wiki.where("project_id in " + public_project_id)
+    count = wikis.count
+    for i in 0...count
+      wiki = wikis[i]
+      idlist+="'" + wiki.id.to_s + "'"
+      if i != count-1
+        idlist = idlist + ","
+      end
+    end
+    idlist += ")"
+    idlist
+  end
+
+  # add by nwb
+  # 公开的board id列表
+  def self.public_board_id
+    idlist = "("
+    boards=Board.where("project_id in " + public_project_id + " or course_id in " + public_course_id)
+    count = boards.count
+    for i in 0...count
+      board = boards[i]
+      idlist+="'" + board.id.to_s + "'"
+      if i != count-1
+        idlist = idlist + ","
+      end
+    end
+    idlist += ")"
+    idlist
+  end
+
+  # add by nwb
+  # 公开的bid id列表
+  def self.public_bid_id
+    idlist = "("
+    bids=Bid.where("reward_type=3")
+    count = bids.count
+    for i in 0...count
+      bid = bids[i]
+      idlist+="'" + bid.id.to_s + "'"
+      if i != count-1
+        idlist = idlist + ","
+      end
+    end
+    idlist += ")"
+    idlist
+  end
+
   # Returns an unsaved copy of the attachment
   def copy(attributes=nil)
     copy = self.class.new
diff --git a/app/views/attachments/autocomplete.js.erb b/app/views/attachments/autocomplete.js.erb
index 784128ea..404ad9a6 100644
--- a/app/views/attachments/autocomplete.js.erb
+++ b/app/views/attachments/autocomplete.js.erb
@@ -1,2 +1,7 @@
 $('#relation_file_form').show();
+<% if @project%>
 $('#relation_file').html('<%=render_attachments_for_new_project(@project, nil)%>');
+<% elsif @course%>
+$('#relation_file').html('<%=render_attachments_for_new_course(@course, nil)%>');
+<% end%>
+
diff --git a/app/views/files/_new.html.erb b/app/views/files/_new.html.erb
index af65bbcf..bd66d93b 100644
--- a/app/views/files/_new.html.erb
+++ b/app/views/files/_new.html.erb
@@ -13,18 +13,25 @@
             <%= select_tag "version_id", content_tag('option', '') +
                     options_from_collection_for_select(versions, "id", "name"), {style: 'width:100px'} %>
           </td>
+          <% if attachmenttypes.any? %>
+              <td><%= l(:attachment_type) %></label></td>
+              <td>
+                <%= select_tag "attachment_type",
+                               options_from_collection_for_select(attachmenttypes, "id",
+                                                                  "typeName", 2), {style: 'width:100px'} %>
+              </td>
+          <% end %>
       <% else %>
-          <td><p></p></td> <td></td>
+          <p>
+            <% if attachmenttypes.any? %>
+                <%= l(:attachment_type) %></label>
+                <%= select_tag "attachment_type",
+                               options_from_collection_for_select(attachmenttypes, "id",
+                                                                  "typeName", 2), {style: 'width:100px'} %>
+            <% end %>
+          </p>
       <% end %>
 
-      <% if attachmenttypes.any? %>
-      <td><%= l(:attachment_type) %></label></td>
-      <td>
-             <%= select_tag "attachment_type",
-                           options_from_collection_for_select(attachmenttypes, "id",
-                                                              "typeName", 2), {style: 'width:100px'} %>
-      </td>
-      <% end %>
     </tr>
   </table>
 
diff --git a/public/stylesheets/application.css b/public/stylesheets/application.css
index 1a690a4c..89ee39ad 100644
--- a/public/stylesheets/application.css
+++ b/public/stylesheets/application.css
@@ -1853,7 +1853,7 @@ a.remove-upload:hover {text-decoration:none !important;}
 
 /*gcm upload file count and deleteall*/
 #upload_file_count #count {color:red; font-size:1.5em;}
-span.add_attachment .remove_all {background:none;background: url(../images/delete.png) no-repeat 1px 50%; width:1px; display:inline-block;position:absolute;right:10%;text-decoration:none;}
+span.add_attachment .remove_all {background:none;background: url(../images/delete.png) no-repeat 1px 50%; width:1px; display:inline-block;right:10%;text-decoration:none;}
 
 
 div.fileover { background-color: lavender; }
diff --git a/public/stylesheets/nyan.css b/public/stylesheets/nyan.css
index b041f43a..30496a06 100644
--- a/public/stylesheets/nyan.css
+++ b/public/stylesheets/nyan.css
@@ -1071,6 +1071,16 @@ div.tags_area {
     border-bottom: 1px solid #c8d4fd;
 }
 
+#ver-zebra #vzebra-attachmenttype, #ver-zebra #vzebra-children {
+    background: #ffffff;
+    border-bottom: 1px solid #c8d4fd;
+}
+
+#ver-zebra #vzebra-contenttype, #ver-zebra #vzebra-children {
+    background: #ffffff;
+    border-bottom: 1px solid #c8d4fd;
+}
+
 #ver-zebra #vzebra-comedy, #ver-zebra #vzebra-action {
     background: #ffffff;
     border-bottom: 1px solid #d6dfff;