source code checkin

src/ServerManager.Common/Converters/HasStringValueConverter.cs

@@ -0,0 +1,34 @@
+using System;
+using System.Collections.Generic;
+using System.Globalization;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.Windows.Data;
+
+namespace ServerManagerTool.Common.Converters
+{
+    public class HasStringValueConverter : IValueConverter
+    {
+        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
+        {
+            if(value == null)
+            {
+                return false;
+            }
+
+            var strValue = value as string;
+            if(String.IsNullOrWhiteSpace(strValue))
+            {
+                return false;
+            }
+
+            return true;
+        }
+
+        public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
+        {
+            throw new InvalidOperationException("IsNullConverter can only be used OneWay.");
+        }
+    }
+}