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.v25.2.dll

NuGet Package : DevExpress.Persistent.Base

csharp

public enum ParametersMode

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)
C# (XPO)

csharp

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.

csharp

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); }
}
//...