From 5235271e1871d5cbedc852c5508c540a7143fc8d Mon Sep 17 00:00:00 2001
From: xue <>
Date: Sun, 4 Mar 2007 02:15:03 +0000
Subject: Fixed #549.

---
 framework/Web/UI/WebControls/TDatePicker.php | 20 +++++++++++++-------
 1 file changed, 13 insertions(+), 7 deletions(-)

(limited to 'framework')

diff --git a/framework/Web/UI/WebControls/TDatePicker.php b/framework/Web/UI/WebControls/TDatePicker.php
index 1d7f780b..ca52523d 100644
--- a/framework/Web/UI/WebControls/TDatePicker.php
+++ b/framework/Web/UI/WebControls/TDatePicker.php
@@ -260,11 +260,14 @@ class TDatePicker extends TTextBox
 	}
 
 	/**
-	 * @return integer current selected date from the date picker as timestamp.
+	 * @return integer current selected date from the date picker as timestamp, NULL if timestamp is not set previously.
 	 */
 	public function getTimeStamp()
 	{
-		return $this->getTimeStampFromText();
+		if(trim($this->getText())==='')
+			return null;
+		else
+			return $this->getTimeStampFromText();
 	}
 
 	/**
@@ -273,11 +276,14 @@ class TDatePicker extends TTextBox
 	 */
 	public function setTimeStamp($value)
 	{
-		$date = TPropertyValue::ensureFloat($value);
-		$formatter = Prado::createComponent('System.Util.TSimpleDateFormatter',
-						$this->getDateFormat());
-						$d =$formatter->format($date);
-		$this->setText($d);
+		if($value===null || (is_string($value) && trim($value)==='')
+			$this->setText('');
+		else
+		{
+			$date = TPropertyValue::ensureFloat($value);
+			$formatter = Prado::createComponent('System.Util.TSimpleDateFormatter',$this->getDateFormat());
+			$this->setText($formatter->format($date));
+		}
 	}
 
 	/**
-- 
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