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ImageField::NullDisplayText Property

Gets or sets the text to display in an ImageField object when the value of the field specified by the DataImageUrlField property is nullptr.

Namespace:  System.Web.UI.WebControls
Assembly:  System.Web (in System.Web.dll)

public:
virtual property String^ NullDisplayText {
	String^ get ();
	void set (String^ value);
}

Property Value

Type: System::String
The text to display when the value of a field is nullptr. The default is an empty string (""), which indicates that this property is not set.

When the value of the field specified by the DataImageUrlField property is nullptr, an image cannot be displayed in an ImageField object. Use the NullDisplayText property to specify the text to display in the image's place. The text usually indicates that the normal image is not available or cannot be found.

NoteNote

As an alternative, you can display an alternate image when the field value is nullptr by setting the NullImageUrl property instead of this property. If the NullImageUrl and NullDisplayText properties are both set, the NullImageUrl property has precedence.

The value of this property, when set, can be saved automatically to a resource file by using a designer tool. For more information, see LocalizableAttribute and ASP.NET Globalization and Localization.

The following example demonstrates how to use the NullDisplayText property to specify the text to display when the value of the field specified by the DataImageUrlField property is nullptr.

No code example is currently available or this language may not be supported.

.NET Framework

Supported in: 4, 3.5, 3.0, 2.0

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.
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