本文整理匯總了VB.NET中System.Web.UI.WebControls.RangeValidator.EvaluateIsValid方法的典型用法代碼示例。如果您正苦於以下問題：VB.NET RangeValidator.EvaluateIsValid方法的具體用法？VB.NET RangeValidator.EvaluateIsValid怎麽用？VB.NET RangeValidator.EvaluateIsValid使用的例子？那麽, 這裏精選的方法代碼示例或許可以為您提供幫助。
在下文中一共展示了RangeValidator.EvaluateIsValid方法的1個代碼示例，這些例子默認根據受歡迎程度排序。您可以為喜歡或者感覺有用的代碼點讚，您的評價將有助於係統推薦出更棒的VB.NET代碼示例。
示例1: EvaluateIsValid
' 導入命名空間
Imports System.Web
Imports System.Security.Permissions
Namespace Samples.AspNet.VB.Controls
<AspNetHostingPermission(SecurityAction.Demand, Level:=AspNetHostingPermissionLevel.Minimal)> _
Public NotInheritable Class CustomRangeValidatorEvaluateIsValid
Inherits System.Web.UI.WebControls.RangeValidator
Protected Overrides Function EvaluateIsValid() As Boolean
' Get the value of the control to validate.
Dim controlValue As String = GetControlValidationValue(ControlToValidate)
' If no value was entered, show the validation error by returning false.
If controlValue.Trim().Length = 0 Then
Return False
End If
' Compare the ControlToValidate's value against the minimum and maximum values.
Return Compare(controlValue, Me.MinimumValue, System.Web.UI.WebControls.ValidationCompareOperator.GreaterThanEqual, Me.Type) AndAlso _
Compare(controlValue, Me.MaximumValue, System.Web.UI.WebControls.ValidationCompareOperator.LessThanEqual, Me.Type)
End Function
End Class
End Namespace