Enterprise Library 3.0体验(4):Validation Applic

2020-11-22 05:25发布

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(
150, Ruleset = "RuleSetA", MessageTemplate="First Name must be between 1 and 50 characters long")]
    
public string FirstName
    
{
        
get return firstName; }
        
set { firstName = value; }
    }


    [StringLengthValidator(
150, 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(
01000000, 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:

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>

4.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:

<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IDPropertyName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:NoneStaticDynamicPropertyProxyValidator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 QuickStart
</h1>
    
        
<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 />
                
<cc1:propertyproxyvalidator id="firstNameValidator" runat="server" 
                    ControlToValidate
="firstN
                    ameTextBox"
 
                    PropertyName
="FirstName" 
                    RulesetName
="RuleSetA" 
                    SourceTypeName
="ValidationAspNetQuickStart.Customer">
                
</cc1:propertyproxyvalidator>
                
</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"></
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