diff --git a/app/Http/Controllers/Api/ProjectController.php b/app/Http/Controllers/Api/ProjectController.php
index 7c49b615..30a00835 100755
--- a/app/Http/Controllers/Api/ProjectController.php
+++ b/app/Http/Controllers/Api/ProjectController.php
@@ -656,6 +656,33 @@ class ProjectController extends AbstractController
         return Base::retSuccess('success', $task->taskFile);
     }
 
+    /**
+     * 删除任务文件（限：项目、任务负责人）
+     *
+     * @apiParam {Number} file_id            文件ID
+     */
+    public function task__filedelete()
+    {
+        User::auth();
+        //
+        $file_id = intval(Request::input('file_id'));
+        //
+        $file = ProjectTaskFile::find($file_id);
+        if (empty($file)) {
+            return Base::retError('文件不存在或已被删除');
+        }
+        //
+        $task = ProjectTask::userTask($file->task_id, [], true, $project);
+        if (!$task->owner && !$project->owner) {
+            return Base::retError('仅限项目或任务负责人操作');
+        }
+        //
+        $task->pushMsg('filedelete', $file);
+        $file->delete();
+        //
+        return Base::retSuccess('success', $file);
+    }
+
     /**
      * {post} 添加任务
      *
diff --git a/resources/assets/js/pages/manage/components/DialogWrapper.vue b/resources/assets/js/pages/manage/components/DialogWrapper.vue
index 3b38a2f7..04ef712f 100644
--- a/resources/assets/js/pages/manage/components/DialogWrapper.vue
+++ b/resources/assets/js/pages/manage/components/DialogWrapper.vue
@@ -106,7 +106,6 @@ export default {
             autoInterval: null,
 
             dialogDrag: false,
-            dialogReady: false,
 
             msgText: '',
             msgNew: 0,
@@ -164,20 +163,12 @@ export default {
 
         dialogId: {
             handler() {
-                this.dialogReady = false;
                 this.autoBottom = true;
                 this.msgNew = 0;
                 this.topId = -1;
                 this.getMsg();
             },
             immediate: true
-        },
-
-        dialogs: {
-            handler() {
-                this.getMsg();
-            },
-            deep: true
         }
     },
 
@@ -186,13 +177,6 @@ export default {
             if (!this.dialogId) {
                 return;
             }
-            if (this.dialogs.findIndex(({id}) => id == this.dialogId) === -1) {
-                return;
-            }
-            if (this.dialogReady) {
-                return;
-            }
-            this.dialogReady = true;
             this.$store.dispatch("getDialogMsgs", this.dialogId);
         },
 
diff --git a/resources/assets/js/pages/manage/components/TaskDetail.vue b/resources/assets/js/pages/manage/components/TaskDetail.vue
index ee3a17fe..cd3dde58 100644
--- a/resources/assets/js/pages/manage/components/TaskDetail.vue
+++ b/resources/assets/js/pages/manage/components/TaskDetail.vue
@@ -285,6 +285,7 @@
                                 <Loading v-else class="file-load"/>
                                 <a class="file-name" :href="file.path||'javascript:;'" target="_blank">{{file.name}}</a>
                                 <div class="file-size">{{$A.bytesToSize(file.size)}}</div>
+                                <i class="iconfont file-delete" @click="deleteFile(file.id)">&#xe6ea;</i>
                             </li>
                         </ul>
                         <ul class="item-content">
@@ -1089,6 +1090,20 @@ export default {
             }).catch(({msg}) => {
                 $A.modalError(msg);
             });
+        },
+
+        deleteFile(file_id) {
+            this.$store.dispatch("forgetTaskFile", file_id)
+            //
+            this.$store.dispatch("call", {
+                url: 'project/task/filedelete',
+                data: {
+                    file_id,
+                },
+            }).catch(({msg}) => {
+                $A.modalError(msg);
+                this.$store.dispatch("getTaskFiles", this.taskDetail.id)
+            });
         }
     }
 }
diff --git a/resources/assets/js/pages/manage/messenger.vue b/resources/assets/js/pages/manage/messenger.vue
index c37d7a9b..a90aa444 100644
--- a/resources/assets/js/pages/manage/messenger.vue
+++ b/resources/assets/js/pages/manage/messenger.vue
@@ -105,9 +105,12 @@ export default {
         dialogList() {
             const {dialogActive, dialogKey} = this;
             if (dialogActive == '' && dialogKey == '') {
-                return this.dialogs;
+                return this.dialogs.filter(({name}) => name !== undefined);
             }
             return this.dialogs.filter(({name, type, group_type, last_msg}) => {
+                if (name === undefined) {
+                    return false;
+                }
                 if (dialogActive) {
                     switch (dialogActive) {
                         case 'project':
diff --git a/resources/assets/js/store/actions.js b/resources/assets/js/store/actions.js
index 077665a4..121fd308 100644
--- a/resources/assets/js/store/actions.js
+++ b/resources/assets/js/store/actions.js
@@ -874,6 +874,19 @@ export default {
         });
     },
 
+    /**
+     * 忘记任务文件
+     * @param state
+     * @param dispatch
+     * @param file_id
+     */
+    forgetTaskFile({state, dispatch}, file_id) {
+        let index = state.taskFiles.findIndex(({id}) => id == file_id)
+        if (index > -1) {
+            state.taskFiles.splice(index, 1)
+        }
+    },
+
     /**
      * 打开任务详情页
      * @param state
@@ -1169,9 +1182,12 @@ export default {
      * @param dialog_id
      */
     getDialogMsgs({state, dispatch}, dialog_id) {
-        const dialog = state.dialogs.find(({id}) => id == dialog_id);
+        let dialog = state.dialogs.find(({id}) => id == dialog_id);
         if (!dialog) {
-            return;
+            dialog = {
+                id: dialog_id,
+            };
+            state.dialogs.push(dialog);
         }
         if (dialog.loading) {
             return;
@@ -1369,6 +1385,7 @@ export default {
                                 // 更新最后消息
                                 dispatch("updateDialogLastMsg", data);
                                 if (mode === "add") {
+                                    let dialog = state.dialogs.find(({id}) => id == data.dialog_id);
                                     // 更新对话列表
                                     if (dialog) {
                                         // 新增未读数
@@ -1443,6 +1460,9 @@ export default {
                                     case 'upload':
                                         dispatch("getTaskFiles", data.task_id)
                                         break;
+                                    case 'filedelete':
+                                        dispatch("forgetTaskFile", data.id)
+                                        break;
                                     case 'archived':
                                     case 'delete':
                                         dispatch("forgetTask", data.id)
diff --git a/resources/assets/sass/pages/components/task-detail.scss b/resources/assets/sass/pages/components/task-detail.scss
index 4df97a2f..d5bb5f1c 100644
--- a/resources/assets/sass/pages/components/task-detail.scss
+++ b/resources/assets/sass/pages/components/task-detail.scss
@@ -180,6 +180,22 @@
                                 font-size: 12px;
                                 color: #bbbbbb;
                             }
+                            .file-delete {
+                                display: none;
+                                padding-left: 12px;
+                                font-size: 14px;
+                                cursor: pointer;
+                                color: #aaaaaa;
+                                transition: color 0.3s;
+                                &:hover {
+                                    color: #ff0000;
+                                }
+                            }
+                            &:hover {
+                                .file-delete {
+                                    display: inline-block;
+                                }
+                            }
                         }
                     }
                     &.subtask {