ParametersMode Enum

Contains values specifying how criteria string parameters used in RuleRangeAttribute and RuleValueComparisonAttribute constructors are treated.

Namespace: DevExpress.Persistent.Validation

Assembly: DevExpress.Persistent.Base.v23.2.dll

NuGet Package: DevExpress.Persistent.Base

Declaration

C#

public enum ParametersMode

VB.NET

Public Enum ParametersMode

Members

Name	Description
Value	A criteria string is treated as a string.
Expression	A criteria string is treated as an expression. So, you can use the Criteria Language Syntax.

Remarks

The following example demonstrates how to pass this enumeration value to the RuleRange attribute:

C# (EF Core)

using System;
using DevExpress.Persistent.Validation;
//...
[RuleRange("LastSevenDays_RuleRange", "Save", "AddDays(LocalDateTimeToday(), -7)", 
    "LocalDateTimeToday()", ParametersMode.Expression)]
public virtual DateTime LastSevenDays { get; set; }

// Make sure that you use options.UseChangeTrackingProxies() in your DbContext settings.

C# (XPO)

using System;
using DevExpress.Persistent.Validation;
//...
private DateTime lastSevenDays;
[RuleRange("LastSevenDays_RuleRange", "Save", "AddDays(LocalDateTimeToday(), -7)", 
    "LocalDateTimeToday()", ParametersMode.Expression)]
public DateTime LastSevenDays {
    get { return lastSevenDays; }
    set { SetPropertyValue(nameof(LastSevenDays), ref lastSevenDays, value); }
}
//...

VB.NET (XPO)

Imports DevExpress.Persistent.Validation
' ...
Private fLastSevenDays As Date
<RuleRange("LastSevenDays_RuleRange", "Save", "AddDays(LocalDateTimeToday(), -7)", 
    "LocalDateTimeToday()", ParametersMode.Expression)>
Public Property LastSevenDays() As Date
    Get
        Return fLastSevenDays
    End Get
    Set(ByVal value As Date)
        SetPropertyValue(NameOf(LastSevenDays), fLastSevenDays, value)
    End Set
End Property
' ...