Gets a value that indicates whether or not the value of the document is null value.
Syntax
| C# | |
|---|
public bool IsNull {get;} |
Property Value
Type:
System.Boolean
true if the document value is null, otherwise false.
Example
The following code example uses the
IsNull property.
| C# |  Copy Code |
|---|
public static int Execute(Instance instance, IZennoPosterProjectModel project)
{
// clear cookies
instance.ClearCookie();
// go to lessons.zennolab.com
Tab tab = instance.MainTab;
if ((tab.IsVoid) || (tab.IsNull)) return -1;
if (tab.IsBusy) tab.WaitDownloading();
tab.Navigate("lessons.zennolab.com");
if (tab.IsBusy) tab.WaitDownloading();
// get document
Document doc = tab.MainDocument;
// if document is null then exit
if (doc.IsNull) return -1;
return 0;
} |
| PHP | Copy Code |
|---|
public static function Execute($instance, $project)
{
// clear cookies
$instance->ClearCookie();
// go to lessons.zennolab.com
$tab = $instance->MainTab;
if (($tab->IsVoid) || ($tab->IsNull)) return -1;
if ($tab->IsBusy) $tab->WaitDownloading();
$tab->Navigate("lessons.zennolab.com");
if ($tab->IsBusy) $tab->WaitDownloading();
// get document
$doc = $tab->MainDocument;
// if document is null then exit
if ($doc->IsNull) return -1;
return 0;
} |
Requirements
Target Platforms: Windows XP Home Edition, Windows XP Professional, Windows Server 2003 family, Windows Vista, Windows Server 2008 family
See Also
