ASPxListBox.Value Property

Gets or sets the editor’s value.

Namespace: DevExpress.Web

Assembly: DevExpress.Web.v23.2.dll

NuGet Package: DevExpress.Web

Declaration

C#

public override object Value { get; set; }

VB.NET

Public Overrides Property Value As Object

Property Value

Type	Description
Object	A Object value representing the editor’s value.

Remarks

This property overrides the base ASPxEdit.Value property to implement a proper display of editor items when the property’s value changes.

The Value property can be used to manipulate the editor’s value.

If you need to validate the editor’s value before posting it, you can handle either client-side ASPxClientEdit.Validate or server-side ASPxEdit.Validate events, or both. If no validation is performed and the value posted is not correct, then an exception is raised.

If the Value property returns null, make sure that you set the ValueType property to an .NET type that matches the ValueField column type. Otherwise, the editor cannot find the corresponding item because the editor’s ValueType property does not match the item type (String by default).

Related GitHub Examples

The following code snippet (auto-collected from DevExpress Examples) contains a reference to the Value property.

Note

The algorithm used to collect these code examples remains a work in progress. Accordingly, the links and snippets below may produce inaccurate results. If you encounter an issue with code examples below, please use the feedback form on this page to report the issue.

C#

asp-net-web-forms-scheduler-custom-adaptive-form-using-templates/CS/WebApplication1/DevExpress/ASPxSchedulerForms/AppointmentForm.ascx.cs#L244

void SetListBoxSelectedValues(ASPxListBox listBox, IEnumerable values) {
    listBox.Value = null;
    foreach(object value in values) {

VB.NET

asp-net-web-forms-scheduler-custom-adaptive-form-using-templates/VB/WebApplication1/DevExpress/ASPxSchedulerForms/AppointmentForm.ascx.vb#L254

Private Sub SetListBoxSelectedValues(ByVal listBox As ASPxListBox, ByVal values As IEnumerable)
    listBox.Value = Nothing
    For Each value As Object In values