DisplayFormatAttribute.NullDisplayText Property
Definition
Important
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Gets or sets the text that is displayed for a field when the field's value is null.
public:
property System::String ^ NullDisplayText { System::String ^ get(); void set(System::String ^ value); };public string NullDisplayText { get; set; }public string? NullDisplayText { get; set; }member this.NullDisplayText : string with get, setPublic Property NullDisplayText As StringProperty Value
The text that is displayed for a field when the field's value is null. The default is an empty string (""), which indicates that this property is not set.
Examples
The following example shows how to use the NullDisplayText to define a caption to display when the data field is null.
// Display the text [Null] when the data field is empty.
// Also, convert empty string to null for storing.
[DisplayFormat(ConvertEmptyStringToNull = true, NullDisplayText = "[Null]")]
public object Size;
' Display the text [Null] when the data field is empty.
' Also, convert empty string to null for storing.
<DisplayFormat(ConvertEmptyStringToNull:=True, NullDisplayText:="[Null]")> _
Public Size As Object
Remarks
Sometimes a data field's value is stored as null values in the source. You can specify custom text to display for data fields that have a null value by setting the NullDisplayText property. If this property is not set, null field values are displayed as empty strings ("").
Note
To convert an empty string field value to a null value, you must set the ConvertEmptyStringToNull property to true.
