[QpTestClient]Fix icon don't change gray when disconnected.

Author: aaasoft

QpTestClient/ConnectionContext.cs

@@ -9,8 +9,23 @@ namespace QpTestClient
     public class ConnectionContext : IDisposable
     {
         public TestConnectionInfo ConnectionInfo { get; private set; }
-        public bool Connected { get; private set; } = false;
+
+        private bool _Connected = false;
+        public bool Connected
+        {
+            get { return _Connected; }
+            private set
+            {
+                if (_Connected == value)
+                    return;
+                _Connected = value;
+                if (!value)
+                    Disconnected?.Invoke(this, EventArgs.Empty);
+            }
+        }
+
         public QpClient QpClient { get; private set; }
+        public event EventHandler Disconnected;
 
         public ConnectionContext(TestConnectionInfo connectionInfo)
         {

QpTestClient/MainForm.cs

@@ -313,14 +313,14 @@ private async void BtnConnectConnection_Click(object sender, EventArgs e)
             if (connectionContext == null)
                 return;
 
-            this.Enabled = false;
+            scMain.Enabled = false;
             try
             {
                 var preConnectionInfoContent = Quick.Xml.XmlConvert.Serialize(connectionContext.ConnectionInfo);
 
                 await connectionContext.Connect();
                 connectionNode.ImageIndex = connectionNode.SelectedImageIndex = 1;
-                connectionContext.QpClient.Disconnected += (sender, e) =>
+                connectionContext.Disconnected += (sender, e) =>
                 {
                     Invoke(new Action(() =>
                     {
@@ -339,7 +339,7 @@ private async void BtnConnectConnection_Click(object sender, EventArgs e)
             {
                 MessageBox.Show($"连接失败，原因：{ExceptionUtils.GetExceptionMessage(ex)}", Application.ProductName, MessageBoxButtons.OK, MessageBoxIcon.Warning);
             }
-            this.Enabled = true;
+            scMain.Enabled = true;
         }
 
         private void BtnRecvHeartbeat_Connection_Click(object sender, EventArgs e)