From 68f8c433bbd36c84e939490fd975f35da188caa2 Mon Sep 17 00:00:00 2001
From: kinfkong <kinfkong@126.com>
Date: Wed, 16 Jan 2019 10:26:58 +0800
Subject: [PATCH] fix issue #334

---
 src/app/components/data-viewer/data-viewer.component.html | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/app/components/data-viewer/data-viewer.component.html b/src/app/components/data-viewer/data-viewer.component.html
index 9ed98e4..4099b64 100644
--- a/src/app/components/data-viewer/data-viewer.component.html
+++ b/src/app/components/data-viewer/data-viewer.component.html
@@ -52,7 +52,7 @@
       <ng-container matColumnDef="checkbox">
         <th mat-header-cell *matHeaderCellDef class="checkbox-col">
           <mat-checkbox (change)="masterCheckboxToggle($event)"
-                        [checked]="hasKeys() && isAllSelected()"
+                        [checked]="hasKeys() && isAllSelected() && data.length > 0"
                         [indeterminate]="hasKeys() && !isAllSelected()">
           </mat-checkbox>
         </th>