From 2f5c21fc625eb0e086121387237e0fb52a1302d7 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E7=9C=BE=E5=B0=8B?= <yanchao4.7@163.com>
Date: Wed, 17 Apr 2019 00:04:43 +0800
Subject: [PATCH] =?UTF-8?q?=E5=A2=9E=E5=8A=A0=E4=BA=86Null2VisibilityConve?=
 =?UTF-8?q?rter=E8=BD=AC=E6=8D=A2=E5=99=A8?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

value是Null的时候隐藏，不为Null时显示
---
 .../HandyControl_Shared.projitems             |  1 +
 .../Themes/Basic/Converters.xaml              |  1 +
 .../Converter/Null2VisibilityConverter.cs     | 20 +++++++++++++++++++
 3 files changed, 22 insertions(+)
 create mode 100644 src/Shared/HandyControl_Shared/Tools/Converter/Null2VisibilityConverter.cs

diff --git a/src/Shared/HandyControl_Shared/HandyControl_Shared.projitems b/src/Shared/HandyControl_Shared/HandyControl_Shared.projitems
index c14ba4cd..5ac2d019 100644
--- a/src/Shared/HandyControl_Shared/HandyControl_Shared.projitems
+++ b/src/Shared/HandyControl_Shared/HandyControl_Shared.projitems
@@ -209,6 +209,7 @@
     <Compile Include="$(MSBuildThisFileDirectory)Tools\Converter\Color2HexStrConverter.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Tools\Converter\Int2StrConverter.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Tools\Converter\Long2FileSizeConverter.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)Tools\Converter\Null2VisibilityConverter.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Tools\Converter\Object2BooleanConverter.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Tools\Converter\String2VisibilityConverter.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Tools\Converter\String2VisibilityReConverter.cs" />
diff --git a/src/Shared/HandyControl_Shared/Themes/Basic/Converters.xaml b/src/Shared/HandyControl_Shared/Themes/Basic/Converters.xaml
index 2de6c240..d883342d 100644
--- a/src/Shared/HandyControl_Shared/Themes/Basic/Converters.xaml
+++ b/src/Shared/HandyControl_Shared/Themes/Basic/Converters.xaml
@@ -16,5 +16,6 @@
     <converter:Int2StrConverter x:Key="Int2StrConverter"/>
     <converter:BorderClipConverter x:Key="BorderClipConverter"/>
     <converter:BorderCircularConverter x:Key="BorderCircularConverter"/>
+    <converter:Null2VisibilityConverter x:Key="Null2VisibilityConverter"/>
 
 </ResourceDictionary>
\ No newline at end of file
diff --git a/src/Shared/HandyControl_Shared/Tools/Converter/Null2VisibilityConverter.cs b/src/Shared/HandyControl_Shared/Tools/Converter/Null2VisibilityConverter.cs
new file mode 100644
index 00000000..d1edc482
--- /dev/null
+++ b/src/Shared/HandyControl_Shared/Tools/Converter/Null2VisibilityConverter.cs
@@ -0,0 +1,20 @@
+using System;
+using System.Globalization;
+using System.Windows;
+using System.Windows.Data;
+
+namespace HandyControl.Tools.Converter
+{
+    public class Null2VisibilityConverter : IValueConverter
+    {
+        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
+        {
+            return value == null ? Visibility.Collapsed : Visibility.Visible;
+        }
+
+        public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
+        {
+            throw new NotImplementedException();
+        }
+    }
+}