Nullable プロパティ (UltraTimeSpanEditor)

コントロールの Value プロパティをユーザーインターフェイスで null に設定できるかどうかを示すブール値を取得または設定します。

シンタックス

Visual Basic

'宣言
 
Public Overrides Property Nullable As Boolean

C#

public override bool Nullable {get; set;}

使用例

Visual Basic

Imports Infragistics.Win
Imports Infragistics.Win.UltraWinEditors

    Private Sub MakeNullable()

        '	Set the Nullable property to true so that when
        '	the edit portion is cleared, the Text property returns
        '	Nothing rather than an empty string
        Me.UltraTextEditor1.Nullable = True

        '	Set the NullText property to "[none]" so that the user
        '	knows that the value is not set
        Me.UltraTextEditor1.NullText = "[none]"

        '	Initialize the value to Nothing
        Me.UltraTextEditor1.Text = Nothing

    End Sub

C#

using System.Diagnostics;
using Infragistics.Win;
using Infragistics.Win.UltraWinEditors;

		private void MakeNullable()
		{
			//	Set the Nullable property to true so that when
			//	the edit portion is cleared, the Text property returns
			//	null rather than an empty string
			this.ultraTextEditor1.Nullable = true;

			//	Set the NullText property to "[none]" so that the user
			//	knows that the value is not set
			this.ultraTextEditor1.NullText = "[none]";

			//	Initialize the value to null
			this.ultraTextEditor1.Text = null;
		}