摘要：也许大家都已经习惯了使用ASP.NET中的验证控件进行数据有效性的验证，但是验证控件的验证无法与我们的自定义的实体类结合起来，两者属于不同层面的验证。在Enterprise Library 3.0中有了Validation Application Block，可以轻松的实现页面验证与类验证的结合。

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1．编写实体类，本文我使用Enterprise Library 3.0 QuickStarts中的例子，采用Atteribute验证的方式（采用配置文件来实现也是一样的），分别设置验证规则集合、错误信息提示等属性，代码如下：

．添加PropertyProxyValidator控件。在工具箱中添加新项，选择Microsoft.Practices.EnterpriseLibrary.Validation.Integration.AspNet，默认的安装路径为C:Program FilesMicrosoft Enterprise Library 3.0 - January 2007 CTPBin，添加完成后可以在工具箱中看到PropertyProxyValidator控件。

public class Customer

{

private string firstName;

private string lastName;

private DateTime dateOfBirth;

private string email;

private int rewardPoints;

[StringLengthValidator(1, 50, Ruleset = "RuleSetA", MessageTemplate="First Name must be between 1 and 50 characters long")]

public string FirstName

{

get { return firstName; }

set { firstName = value; }

}

[StringLengthValidator(1, 50, Ruleset = "RuleSetA", MessageTemplate = "Last Name must be between 1 and 50 characters long")]

public string LastName

{

get { return lastName; }

set { lastName = value; }

}

[RelativeDateTimeValidator(-120, DateTimeUnit.Year, -18, DateTimeUnit.Year, Ruleset = "RuleSetA", MessageTemplate="Must be 18 years old")]

public DateTime DateOfBirth

{

get { return dateOfBirth; }

set { dateOfBirth = value; }

}

[RegexValidator(@"w+([-+.']w+)*@w+([-.]w+)*.w+([-.]w+)*", Ruleset = "RuleSetA")]

public string Email

{

get { return email; }

set { email = value; }

}

[Int32RangeValidator(0, 1000000, Ruleset = "RuleSetA", MessageTemplate = "Rewards points cannot exceed 1,000,000")]

public int RewardPoints

{

get { return rewardPoints; }

set { rewardPoints = value; }

}

2

3．编写ASPX页面，如下图所示：

代码如下：

．在页面上需要验证的地方添加PropertyProxyValidator控件，基本的属性设置如下：．在这里有两个验证器用到了OnValueConvert事件，对应的CS代码如下：．运行后，输入错误的数据如下图所示：

<div>

<h3>

Validation Application Block: ASP.NET Integration QuickStarth3>

<table>

<tr>

First Name:td>

<asp:TextBox ID="firstNameTextBox" runat="server" Width="235px">asp:TextBox>

<br />

td>

tr>

<tr>

Last Name:td>

<asp:TextBox ID="lastNameTextBox" runat="server" Width="235px">asp:TextBox><br />

td>

tr>

<tr>

Date Of Birth:td>

<asp:TextBox ID="dateOfBirthTextBox" runat="server">asp:TextBox><br />

td>

tr>

<tr>

E-mail:td>

<asp:TextBox ID="emailTextBox" runat="server" Width="235px">asp:TextBox><br />

td>

tr>

<tr>

Rewards Points:td>

<asp:TextBox ID="rewardsPointsTextBox" runat="server">asp:TextBox><br />

td>

tr>

<tr>

td>

<asp:Button ID="submitButton" runat="server" Text="Submit" OnClick="submitButton_Click" />

<asp:Label ID="validationResultsLabel" runat="server">asp:Label>td>

tr>

table>

div>

4

<cc1:propertyproxyvalidator id="firstNameValidator" runat="server"

ControlToValidate="ContolToValidate"

PropertyName="PropertyName"

RulesetName="RuleSetName"

SourceTypeName="ValidationAspNetQuickStart.Customer">

cc1:propertyproxyvalidator>

其中ControlToValidate指定对应的需要验证的控件ID，PropertyName指定在实体类中的属性名，RulesetName指定验证规则的名称，SourceTypeName指定实体类型名，当然了你也可以像验证控件一样通过Display属性来指定验证信息的显示方式：None、Static、Dynamic。PropertyProxyValidator还有一个很重要的事件OnValueConvert，在事件可以通过做类型转换根据是否抛出异常来判断输入是否正确，以及设置验证提示信息等。添加完PropertyProxyValidator后代码如下：

<div>

<h1>

Validation Application Block: ASP.NET Integration QuickStarth1>

<table>

<tr>

First Name:td>

<asp:TextBox ID="firstNameTextBox" runat="server" Width="235px">asp:TextBox>

<br />

<cc1:propertyproxyvalidator id="firstNameValidator" runat="server"

ControlToValidate="firstN

ameTextBox"

PropertyName="FirstName"

RulesetName="RuleSetA"

SourceTypeName="ValidationAspNetQuickStart.Customer">

cc1:propertyproxyvalidator>

td>

tr>

<tr>

Last Name:td>

<asp:TextBox ID="lastNameTextBox" runat="server" Width="235px">asp:TextBox><br />

<cc1:PropertyProxyValidator ID="lastNameValidator" runat="server" ControlToValidate="lastNameTextBox"

PropertyName="LastName" RulesetName="RuleSetA" SourceTypeName="ValidationAspNetQuickStart.Customer">cc1:PropertyProxyValidator>td>

tr>

<tr>

Date Of Birth:td>

<asp:TextBox ID="dateOfBirthTextBox" runat="server">asp:TextBox><br />

<cc1:PropertyProxyValidator ID="dateOfBirthValidator" runat="server" ControlToValidate="dateOfBirthTextBox"

OnValueConvert="dateOfBirthValidator_ValueConvert" PropertyName="DateOfBirth"

RulesetName="RuleSetA" SourceTypeName="ValidationAspNetQuickStart.Customer">cc1:PropertyProxyValidator>td>

tr>

<tr>

E-mail:td>

<asp:TextBox ID="emailTextBox" runat="server" Width="235px">asp:TextBox><br />

<cc1:PropertyProxyValidator ID="emailValidator" runat="server" ControlToValidate="emailTextBox"

PropertyName="Email" RulesetName="RuleSetA" SourceTypeName="ValidationAspNetQuickStart.Customer">cc1:PropertyProxyValidator>td>

tr>

<tr>

Rewards Points:td>

来自 “ ITPUB博客 ” ，链接：https://blog.itpub.net/10771986/viewspace-967739/ ，如需转载，请注明出处，否则将追究法律责任。

ITPub博客

Enterprise Library 3.0 (3) Validation Application Block与ASP.NET集成

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