本文整理汇总了VB.NET中System.Web.UI.WebControls.RangeValidator.EvaluateIsValid方法的典型用法代码示例。如果您正苦于以下问题：VB.NET RangeValidator.EvaluateIsValid方法的具体用法？VB.NET RangeValidator.EvaluateIsValid怎么用？VB.NET RangeValidator.EvaluateIsValid使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。
在下文中一共展示了RangeValidator.EvaluateIsValid方法的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的VB.NET代码示例。
示例1: EvaluateIsValid
' 导入命名空间
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