diff --git a/Bin/net40/SunnyUI.Demo.exe b/Bin/net40/SunnyUI.Demo.exe
index 2bea95d7..304edd3e 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 b0ca4fa5..47967f15 100644
Binary files a/Bin/net40/SunnyUI.dll and b/Bin/net40/SunnyUI.dll differ
diff --git a/SunnyUI.Demo/Controls/FCombobox.cs b/SunnyUI.Demo/Controls/FCombobox.cs
index b5315994..211babb6 100644
--- a/SunnyUI.Demo/Controls/FCombobox.cs
+++ b/SunnyUI.Demo/Controls/FCombobox.cs
@@ -126,6 +126,7 @@ namespace Sunny.UI.Demo
         private void uiDatePicker3_ValueChanged(object sender, DateTime value)
         {
             ShowInfoTip(uiDatePicker3.Value.DateString());
+            Console.WriteLine(uiDatePicker3.Value);
         }
     }
 }
diff --git a/SunnyUI/Controls/UIDatePicker.cs b/SunnyUI/Controls/UIDatePicker.cs
index 0e604ec9..805ca9c4 100644
--- a/SunnyUI/Controls/UIDatePicker.cs
+++ b/SunnyUI/Controls/UIDatePicker.cs
@@ -93,7 +93,7 @@ namespace Sunny.UI
                 try
                 {
                     DateTime dt = Text.ToDateTime(DateFormat);
-                    Value = dt;
+                    if (Value != dt) Value = dt;
                 }
                 catch
                 {
diff --git a/SunnyUI/Controls/UIDateTimePicker.cs b/SunnyUI/Controls/UIDateTimePicker.cs
index 6b854711..57b0a4e8 100644
--- a/SunnyUI/Controls/UIDateTimePicker.cs
+++ b/SunnyUI/Controls/UIDateTimePicker.cs
@@ -81,7 +81,7 @@ namespace Sunny.UI
                 try
                 {
                     DateTime dt = Text.ToDateTime(DateFormat);
-                    Value = dt;
+                    if (Value != dt) Value = dt;
                 }
                 catch
                 {
@@ -100,8 +100,7 @@ namespace Sunny.UI
             try
             {
                 DateTime dt = Text.ToDateTime(DateFormat);
-                if (Value != dt)
-                    Value = dt;
+                if (Value != dt) Value = dt;
             }
             catch
             {
diff --git a/SunnyUI/Controls/UITimePicker.cs b/SunnyUI/Controls/UITimePicker.cs
index b7ae9eac..8e0fb61e 100644
--- a/SunnyUI/Controls/UITimePicker.cs
+++ b/SunnyUI/Controls/UITimePicker.cs
@@ -73,7 +73,7 @@ namespace Sunny.UI
                 try
                 {
                     DateTime dt = (DateTime.Now.DateString() + " " + Text).ToDateTime(DateTimeEx.DateFormat + " " + timeFormat);
-                    Value = dt;
+                    if (Value != dt) Value = dt;
                 }
                 catch
                 {
@@ -92,8 +92,7 @@ namespace Sunny.UI
             try
             {
                 DateTime dt = (DateTime.Now.DateString() + " " + Text).ToDateTime(DateTimeEx.DateFormat + " " + timeFormat);
-                if (Value != dt)
-                    Value = dt;
+                if (Value != dt) Value = dt;
             }
             catch
             {