diff --git a/Bin/net40/SunnyUI.Demo.exe b/Bin/net40/SunnyUI.Demo.exe
index 6d53fefe..58457424 100644
Binary files a/Bin/net40/SunnyUI.Demo.exe and b/Bin/net40/SunnyUI.Demo.exe differ
diff --git a/Bin/net40/SunnyUI.dll b/Bin/net40/SunnyUI.dll
index 1ee41957..fccffa1a 100644
Binary files a/Bin/net40/SunnyUI.dll and b/Bin/net40/SunnyUI.dll differ
diff --git a/SunnyUI.Demo/Properties/Resources.Designer.cs b/SunnyUI.Demo/Properties/Resources.Designer.cs
index 12ed5a67..26efc564 100644
--- a/SunnyUI.Demo/Properties/Resources.Designer.cs
+++ b/SunnyUI.Demo/Properties/Resources.Designer.cs
@@ -19,7 +19,7 @@ namespace Sunny.UI.Demo.Properties {
     // 类通过类似于 ResGen 或 Visual Studio 的工具自动生成的。
     // 若要添加或移除成员，请编辑 .ResX 文件，然后重新运行 ResGen
     // (以 /str 作为命令选项)，或重新生成 VS 项目。
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("System.Resources.Tools.StronglyTypedResourceBuilder", "17.0.0.0")]
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("System.Resources.Tools.StronglyTypedResourceBuilder", "16.0.0.0")]
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute()]
     [global::System.Runtime.CompilerServices.CompilerGeneratedAttribute()]
     internal class Resources {
@@ -271,7 +271,7 @@ namespace Sunny.UI.Demo.Properties {
         }
         
         /// <summary>
-        ///   查找类似 20220207 的本地化字符串。
+        ///   查找类似 20220209 的本地化字符串。
         /// </summary>
         internal static string BuildDate {
             get {
diff --git a/SunnyUI.Demo/Properties/Resources.resx b/SunnyUI.Demo/Properties/Resources.resx
index 4e589a6c..c32fe02d 100644
--- a/SunnyUI.Demo/Properties/Resources.resx
+++ b/SunnyUI.Demo/Properties/Resources.resx
@@ -155,7 +155,7 @@
     <value>..\Resources\brescia.png;System.Drawing.Bitmap, System.Drawing, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a</value>
   </data>
   <data name="BuildDate" xml:space="preserve">
-    <value>20220207</value>
+    <value>20220209</value>
   </data>
   <data name="ChartDarkStyle" type="System.Resources.ResXFileRef, System.Windows.Forms">
     <value>..\Resources\ChartDarkStyle.png;System.Drawing.Bitmap, System.Drawing, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a</value>
diff --git a/SunnyUI/Charts/UILineChart.cs b/SunnyUI/Charts/UILineChart.cs
index ea30fc33..02002e21 100644
--- a/SunnyUI/Charts/UILineChart.cs
+++ b/SunnyUI/Charts/UILineChart.cs
@@ -30,6 +30,7 @@
  * 2021-12-31: V3.0.9 X轴支持字符串显示
  * 2022-01-06: V3.1.0 支持FillColor透明
  * 2022-01-09: V3.1.0 双坐标轴支持选区域缩放
+ * 2022-02-09: V3.1.0 增加图线隐藏
 ******************************************************************************/
 
 using System;
@@ -427,7 +428,7 @@ namespace Sunny.UI
 
         protected virtual void DrawSeries(Graphics g, Color color, UILineSeries series)
         {
-            if (series.Points.Count == 0)
+            if (series.Points.Count == 0 || !series.Visible)
             {
                 return;
             }
@@ -588,6 +589,8 @@ namespace Sunny.UI
         {
             foreach (var series in Option.Series.Values)
             {
+                if (series.Points.Count == 0 || !series.Visible) continue;
+
                 Color color = series.Color;
                 if (series.SymbolColor.IsValid()) color = series.SymbolColor;
 
@@ -775,6 +778,7 @@ namespace Sunny.UI
                 foreach (var series in Option.Series.Values)
                 {
                     if (series.DataCount == 0) continue;
+                    if (!series.Visible) continue;
                     if (series.GetNearestPoint(e.Location, 4, out double x, out double y, out int index))
                     {
                         UILineSelectPoint point = new UILineSelectPoint();
diff --git a/SunnyUI/Charts/UILineChartOption.cs b/SunnyUI/Charts/UILineChartOption.cs
index ccded052..49269cdb 100644
--- a/SunnyUI/Charts/UILineChartOption.cs
+++ b/SunnyUI/Charts/UILineChartOption.cs
@@ -69,83 +69,59 @@ namespace Sunny.UI
             return series;
         }
 
-        public UILineSeries AddSeries(string name, bool isY2 = false)
+        public UILineSeries AddSeries(string seriesName, bool isY2 = false)
         {
-            if (name.IsNullOrEmpty()) return null;
-            UILineSeries series = new UILineSeries(name, isY2);
+            if (seriesName.IsNullOrEmpty()) return null;
+            UILineSeries series = new UILineSeries(seriesName, isY2);
             AddSeries(series);
             return series;
         }
 
-        public void AddData(string name, double x, double y)
+        public void AddData(string seriesName, double x, double y)
         {
-            if (!Series.ContainsKey(name)) return;
-            Series[name].Add(x, y);
+            if (!Series.ContainsKey(seriesName)) return;
+            Series[seriesName].Add(x, y);
         }
 
-        public void AddData(string name, DateTime x, double y)
+        public void AddData(string seriesName, DateTime x, double y)
         {
-            if (!Series.ContainsKey(name)) return;
-            Series[name].Add(x, y);
+            if (!Series.ContainsKey(seriesName)) return;
+            Series[seriesName].Add(x, y);
         }
 
-        public void AddData(string name, string x, double y)
-        {
-            if (!Series.ContainsKey(name)) return;
-            Series[name].Add(x, y);
-        }
-
-        public void AddData(string name, List<double> x, List<double> y)
+        public void AddData(string seriesName, List<double> x, List<double> y)
         {
             if (x.Count != y.Count) return;
             for (int i = 0; i < x.Count; i++)
             {
-                AddData(name, x[i], y[i]);
+                AddData(seriesName, x[i], y[i]);
             }
         }
 
-        public void AddData(string name, List<DateTime> x, List<double> y)
+        public void AddData(string seriesName, List<DateTime> x, List<double> y)
         {
             if (x.Count != y.Count) return;
             for (int i = 0; i < x.Count; i++)
             {
-                AddData(name, x[i], y[i]);
+                AddData(seriesName, x[i], y[i]);
             }
         }
 
-        public void AddData(string name, List<string> x, List<double> y)
-        {
-            if (x.Count != y.Count) return;
-            for (int i = 0; i < x.Count; i++)
-            {
-                AddData(name, x[i], y[i]);
-            }
-        }
-
-        public void AddData(string name, double[] x, double[] y)
+        public void AddData(string seriesName, double[] x, double[] y)
         {
             if (x.Length != y.Length) return;
             for (int i = 0; i < x.Length; i++)
             {
-                AddData(name, x[i], y[i]);
+                AddData(seriesName, x[i], y[i]);
             }
         }
 
-        public void AddData(string name, DateTime[] x, double[] y)
+        public void AddData(string seriesName, DateTime[] x, double[] y)
         {
             if (x.Length != y.Length) return;
             for (int i = 0; i < x.Length; i++)
             {
-                AddData(name, x[i], y[i]);
-            }
-        }
-
-        public void AddData(string name, string[] x, double[] y)
-        {
-            if (x.Length != y.Length) return;
-            for (int i = 0; i < x.Length; i++)
-            {
-                AddData(name, x[i], y[i]);
+                AddData(seriesName, x[i], y[i]);
             }
         }
 
@@ -159,11 +135,11 @@ namespace Sunny.UI
             Series.Clear();
         }
 
-        public void Clear(string name)
+        public void Clear(string seriesName)
         {
-            if (Series.ContainsKey(name))
+            if (Series.ContainsKey(seriesName))
             {
-                Series[name].Clear();
+                Series[seriesName].Clear();
             }
         }
 
@@ -328,6 +304,8 @@ namespace Sunny.UI
 
         public bool IsY2 { get; private set; }
 
+        public bool Visible { get; set; } = true;
+
         public UILineSeries(string name, bool isY2 = false)
         {
             Name = name;
diff --git a/SunnyUI/Controls/UIAnalogMeter.cs b/SunnyUI/Controls/UIAnalogMeter.cs
index ced7da0d..76c96aa1 100644
--- a/SunnyUI/Controls/UIAnalogMeter.cs
+++ b/SunnyUI/Controls/UIAnalogMeter.cs
@@ -328,10 +328,6 @@ namespace Sunny.UI
             Invalidate();
         }
 
-        protected override void OnPaintBackground(PaintEventArgs e)
-        {
-        }
-
         protected override void OnPaint(PaintEventArgs e)
         {
             if (Width <= 0 || Height <= 0) return;