验证程序块与ASP.NET的集成

来源：作者：佚名出处：巧巧读书 2008-02-11 进入讨论组

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。

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：

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．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 Files\Microsoft Enterprise Library 3.0 - January 2007 CTP\Bin，添加完成后可以在工具箱中看到PropertyProxyValidator控件。

3．编写ASPX页面，如下图所示：

点击查看大图

代码如下：

<div>
    <h3>
        Validation Application Block: ASP.NET Integration QuickStart</h3>

        <table>
            <tr>
                <td style="width: 100px">
                    First Name:</td>
                <td style="width: 508px">
                    <asp:TextBox ID="firstNameTextBox" runat="server" Width="235px"></asp:TextBox>&nbsp;
                    <br />
                </td>
            </tr>
            <tr>
                <td style="width: 100px; height: 21px">
                    Last Name:</td>
                <td style="width: 508px; height: 21px">
                    <asp:TextBox ID="lastNameTextBox" runat="server" Width="235px"></asp:TextBox><br />
                    </td>
            </tr>
            <tr>
                <td style="width: 100px">
                    Date Of Birth:</td>
                <td style="width: 508px">
                    <asp:TextBox ID="dateOfBirthTextBox" runat="server"></asp:TextBox><br />
                    </td>
            </tr>
            <tr>
                <td style="width: 100px">
                    E-mail:</td>
                <td style="width: 508px">
                    <asp:TextBox ID="emailTextBox" runat="server" Width="235px"></asp:TextBox><br />
                    </td>
            </tr>
            <tr>
                <td style="width: 100px; height: 25px;">
                    Rewards Points:</td>
                <td style="width: 508px; height: 25px;">
                    <asp:TextBox ID="rewardsPointsTextBox" runat="server"></asp:TextBox><br />
                    </td>
            </tr>
            <tr>
                <td style="width: 100px">
                </td>
                <td style="width: 508px">
                    <asp:Button ID="submitButton" runat="server" Text="Submit" OnClick="submitButton_Click" />&nbsp;
                    <asp:Label ID="validationResultsLabel" runat="server"></asp:Label></td>
            </tr>
        </table>
</div>

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