基于WPF實(shí)現(xiàn)驗(yàn)證碼控件

第基于WPF實(shí)現(xiàn)驗(yàn)證碼控件一、創(chuàng)建CheckCode.xaml代碼如下

ResourceDictionary

xmlns="/winfx/2006/xaml/presentation"

xmlns:x="/winfx/2006/xaml"

xmlns:controls="clr-namespace:WPFDevelopers.Controls"

ResourceDictionary.MergedDictionaries

ResourceDictionary

Source="Basic/ControlBasic.xaml"/

/ResourceDictionary.MergedDictionaries

Style

TargetType="{x:Type

controls:CheckCode}"

BasedOn="{StaticResource

ControlBasicStyle}"

Setter

Property="Background"

Value="{x:Null}"/

Setter

Property="Width"

Value="100"/

Setter

Property="Height"

Value="40"/

Setter

Property="Cursor"

Value="Hand"/

Setter

Property="Template"

Setter.Value

ControlTemplate

TargetType="{x:Type

controls:CheckCode}"

Image

x:Name="PART_Image"

Stretch="Fill"

Source="{TemplateBinding

ImageSource}"/

/ControlTemplate

/Setter.Value

/Setter

/Style

/ResourceDictionary

二、CheckCode.cs代碼如下

using

System;

using

System.Windows;

using

System.Windows.Controls;

using

System.Windows.Input;

using

System.Windows.Media;

using

System.Windows.Media.Imaging;

namespace

WPFDevelopers.Controls

[TemplatePart(Name

=

ImageTemplateName,

Type

=

typeof(Image))]

public

class

CheckCode

:

Control

{

private

const

string

ImageTemplateName

=

"PART_Image";

private

Image

_image;

private

Size

_size

=

new

Size(70,

23);

private

const

string

strCode

=

"abcdefhkmnprstuvwxyzABCDEFGHJKLMNPQRSTUVWXYZ23456789";

public

static

readonly

DependencyProperty

ImageSourceProperty

=

DependencyProperty.Register("ImageSource",

typeof(ImageSource),

typeof(CheckCode),new

PropertyMetadata(null));

///

summary

///

隨機(jī)生成的驗(yàn)證碼

///

/summary

public

ImageSource

ImageSource

{

get

{

return

(ImageSource)GetValue(ImageSourceProperty);

}

set

{

SetValue(ImageSourceProperty,

value);

}

}

///

summary

///

字體顏色

///

/summary

public

Brush

SizeColor

{

get

{

return

(Brush)GetValue(SizeColorProperty);

}

set

{

SetValue(SizeColorProperty,

value);

}

}

public

static

readonly

DependencyProperty

SizeColorProperty

=

DependencyProperty.Register("SizeColor",

typeof(Brush),

typeof(CheckCode),

new

PropertyMetadata(DrawingContextHelper.Brush));

public

CheckCode()

{

this.Loaded

+=

CheckCode_Loaded;

}

private

void

CheckCode_Loaded(object

sender,

RoutedEventArgs

e)

{

ImageSource

=

CreateCheckCodeImage(CreateCode(4),

(int)this.ActualWidth,

(int)this.ActualHeight);

}

public

override

void

OnApplyTemplate()

{

base.OnApplyTemplate();

_ima