Επεξεργασία

Κοινή χρήση μέσω

Binding.NullValue Property

  • Reference

Definition

Namespace:
System.Windows.Forms
Assembly:
System.Windows.Forms.dll
Source:
Binding.cs
Source:
Binding.cs
Source:
Binding.cs

Gets or sets the Object to be set as the control property when the data source contains a DBNull value.

public:
 property System::Object ^ NullValue { System::Object ^ get(); void set(System::Object ^ value); };
public object NullValue { get; set; }
public object? NullValue { get; set; }
member this.NullValue : obj with get, set
Public Property NullValue As Object

Property Value

Object

The Object to be set as the control property when the data source contains a DBNull value. The default is null.

Remarks

The data source must contain DBNull for the NullValue property to be correctly applied. If the data source type is a type such as a string or integer the value of the NullValue property will be ignored. Also, the NullValue property is ignored if it is set to null.

A null value will be added to the data source when the control property is set to the object of NullValue. If NullValue is set to a string value, comparisons are case-insensitive.

Applies to