From 5080d85a47370b2882af0afa8891e61a21de0515 Mon Sep 17 00:00:00 2001
From: Erik Zhang <erik@vcage.com>
Date: Fri, 21 Oct 2016 13:47:35 +0800
Subject: [PATCH] prevent users from deleting system assets

---
 AntSharesUI/UI/MainForm.cs | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/AntSharesUI/UI/MainForm.cs b/AntSharesUI/UI/MainForm.cs
index b28c4cf276..902ea3e4f1 100644
--- a/AntSharesUI/UI/MainForm.cs
+++ b/AntSharesUI/UI/MainForm.cs
@@ -520,7 +520,12 @@ private void 删除DToolStripMenuItem_Click(object sender, EventArgs e)
 
         private void contextMenuStrip2_Opening(object sender, CancelEventArgs e)
         {
-            删除DToolStripMenuItem1.Enabled = listView2.SelectedIndices.Count > 0;
+            bool enabled = listView2.SelectedIndices.Count > 0;
+            if (enabled)
+            {
+                enabled = listView2.SelectedItems.OfType<ListViewItem>().Select(p => (RegisterTransaction)p.Tag).All(p => p.AssetType != AssetType.AntShare && p.AssetType != AssetType.AntCoin);
+            }
+            删除DToolStripMenuItem1.Enabled = enabled;
         }
 
         private void 删除DToolStripMenuItem1_Click(object sender, EventArgs e)