转换器 - String转换为Visible

PDF Office/DataConvert/StringToVisibleConvert.cs

@@ -0,0 +1,65 @@
+using System;
+using System.Collections.Generic;
+using System.Globalization;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.Windows;
+using System.Windows.Data;
+
+namespace PDF_Office.DataConvert
+{
+    public class StringToVisibleConvert : IValueConverter
+    {
+        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
+        {
+            if (value == null || string.IsNullOrEmpty((string)value))
+            {
+                return Visibility.Collapsed;
+            }
+            else
+            {
+                if (value is string && (value as string).Length > 0)
+                {
+                    return Visibility.Visible;
+                }
+                else
+                {
+                    return Visibility.Collapsed;
+                }
+            }
+        }
+
+        public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
+        {
+            return null;
+        }
+    }
+
+    public class StringToUnVisibleConvert : IValueConverter
+    {
+        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
+        {
+            if (value == null)
+            {
+                return Visibility.Visible;
+            }
+            else
+            {
+                if (value is string && (value as string).Length > 0)
+                {
+                    return Visibility.Collapsed;
+                }
+                else
+                {
+                    return Visibility.Visible;
+                }
+            }
+        }
+
+        public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
+        {
+            return null;
+        }
+    }
+}

PDF Office/PDF Office.csproj

@@ -214,6 +214,7 @@
     </Compile>
     <Compile Include="DataConvert\FileFormatToIconConvert.cs" />
     <Compile Include="DataConvert\PropertyPanelVisible.cs" />
+    <Compile Include="DataConvert\StringToVisibleConvert.cs" />
     <Compile Include="DataConvert\UnVisivleConvert.cs" />
     <Compile Include="EventAggregators\PageEditNotifyEvent.cs" />
     <Compile Include="EventAggregators\PageEditRefreshEvent.cs" />