WPF 验证控件
<Window x:Class=
"WpfApplication2.ValidationTest"
xmlns=
"http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x=
"http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:local=
"clr-namespace:WpfApplication2"
Title=
"ValidationTest"
Height=
"300"
Width=
"800"
>
<Window.Resources>
<Style TargetType=
"{x:Type TextBox}"
>
<Setter Property=
"Validation.ErrorTemplate"
>
<Setter.Value>
<ControlTemplate>
<DockPanel LastChildFill=
"True"
>
<TextBlock DockPanel.Dock=
"Right"
Foreground=
"Red"
Margin=
"5"
FontSize=
"12pt"
Text="{Binding ElementName=MyAdorner,
Path=AdornedElement.(Validation.Errors)[0].ErrorContent}">
</TextBlock>
<Border BorderBrush=
"Green"
BorderThickness=
"3"
>
<AdornedElementPlaceholder Name=
"MyAdorner"
/>
</Border>
</DockPanel>
</ControlTemplate>
</Setter.Value>
</Setter>
<Style.Triggers>
<Trigger Property=
"Validation.HasError"
Value=
"true"
>
<Setter Property=
"ToolTip"
Value="{Binding RelativeSource={RelativeSource Self},
Path=(Validation.Errors)[0].ErrorContent}"/>
</Trigger>
</Style.Triggers>
</Style>
</Window.Resources>
<Grid>
<TextBox Width=
"200"
Height=
"50"
Margin=
"5"
VerticalAlignment=
"Top"
>
<TextBox.Text>
<Binding Path=
"Name"
UpdateSourceTrigger=
"PropertyChanged"
>
<Binding.ValidationRules>
<ExceptionValidationRule />
</Binding.ValidationRules>
</Binding>
</TextBox.Text>
</TextBox>
<TextBox Width=
"200"
Margin=
"5"
Height=
"50"
VerticalAlignment=
"Center"
>
<TextBox.Text>
<Binding Path=
"Address"
UpdateSourceTrigger=
"PropertyChanged"
>
<Binding.ValidationRules>
<local:StringRangeValidationRule MinimumLength=
"1"
MaximumLength=
"30"
ErrorMessage=
"Address is required and must be less than 30 letters."
/>
</Binding.ValidationRules>
</Binding>
</TextBox.Text>
</TextBox>
<TextBox Text=
"HI"
Height=
"50"
Width=
"200"
VerticalAlignment=
"Bottom"
/>
</Grid>
</Window>
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后台代码：
using
System;
using
System.Collections.Generic;
using
System.Linq;
using
System.Text;
using
System.Windows;
using
System.Windows.Controls;
using
System.Windows.Data;
using
System.Windows.Documents;
using
System.Windows.Input;
using
System.Windows.Media;
using
System.Windows.Media.Imaging;
using
System.Windows.Shapes;
namespace
WpfApplication2
{
/// <summary>
/// Interaction logic for ValidationTest.xaml
/// </summary>
public
partial
class
ValidationTest : Window
{
public
ValidationTest()
{
InitializeComponent();
SimpleCustomer c =
new
SimpleCustomer();
c.Name =
"Fred"
;
c.Address =
"1/3 Powell Street"
;
this
.DataContext = c;
}
}
/// <summary>
/// 异常验证
/// </summary>
public
class
SimpleCustomer
{
public
SimpleCustomer()
{ }
private
string
m_strName;
public
string
Name
{
set
{
this
.m_strName = value;
if
(String.IsNullOrEmpty(
this
.m_strName))
{
throw
new
ApplicationException(
"Customer name is mandatory."
);
}
}
get
{
return
this
.m_strName;
}
}
private
string
m_strAddress;
public
string
Address
{
set
{
this
.m_strAddress = value;
}
get
{
return
this
.m_strAddress;
}
}
}
/// <summary>
/// 自定义验证
/// </summary>
public
class
StringRangeValidationRule : ValidationRule
{
public
StringRangeValidationRule()
{ }
private
int
m_intMinimumLength = -1;
public
int
MinimumLength
{
set
{
this
.m_intMinimumLength = value;
}
get
{
return
this
.m_intMinimumLength;
}
}
private
int
m_intMaximumLength = -1;
public
int
MaximumLength
{
set
{
this
.m_intMaximumLength = value;
}
get
{
return
this
.m_intMaximumLength;
}
}
private
string
m_strErrorMessage =
string
.Empty;
public
string
ErrorMessage
{
set
{
this
.m_strErrorMessage = value;
}
get
{
return
this
.m_strErrorMessage;
}
}
public
override
ValidationResult Validate(
object
value, System.Globalization.CultureInfo cultureInfo)
{
ValidationResult result =
new
ValidationResult(
true
,
null
);
string
inputString =(value ??
string
.Empty).ToString();
if
( inputString ==
null
)
{
inputString =
string
.Empty;
}
if
(inputString.Length <
this
.m_intMinimumLength || inputString.Length >
this
.m_intMaximumLength)
{
return
new
ValidationResult(
false
,
this
.ErrorMessage);
}
return
result;
}
}
}
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本文转自Work Hard Work Smart博客园博客，原文链接：http://www.cnblogs.com/linlf03/archive/2011/12/26/2172466.html，如需转载请自行联系原作者
