本步很简单，就是在年龄输入栏中引入我们自定义的TextBox控件，使得此栏在录入数字时只接受正整数，如果用户想键入其它字符则TextBox不接受。这样就减轻了数据校验的压力，多了一层防护。
控件的创建我们在这里不再重复，请参见SilverLight学习笔记--利用DependencyProperty依赖属性创建自备录入过滤功能的TextBox控件 。
我们需要做的就是在项目SLApplicationDataTest中引入我们创建的自定义控件，如图:
修改我们的Page.xaml文件，在头部引入:
xmlns:mytxtbxsrc
=
"
clr-namespace:SLFilterTextBox;assembly=SLFilterTextBox
"
找到Age段，改为:
<
data:DataGridTemplateColumn Header
=
"
Age
"
>
<
data:DataGridTemplateColumn.CellTemplate
>
<
DataTemplate
>
<
Border Background
=
"
{Binding Validator.InvalidAge, Converter={StaticResource myBrushConvert}}
"
ToolTipService.ToolTip
=
"
{Binding Path=Validator, Converter={StaticResource myErrMsgConvert}, ConverterParameter=Age}
"
>
<
TextBlock Text
=
"
{Binding Age}
"
></
TextBlock
>
</
Border
>
</
DataTemplate
>
</
data:DataGridTemplateColumn.CellTemplate
>
<
data:DataGridTemplateColumn.CellEditingTemplate
>
<
DataTemplate
>
<
mytxtbxsrc:MyFilterTextBox x:Name
=
"
myFilterTBAge
"
Text
=
"
{Binding Age , Mode=TwoWay, NotifyOnValidationError=True, ValidatesOnExceptions=True}
"
Background
=
"
{Binding Validator.InvalidAge, Converter={StaticResource myBrushConvert}}
"
Loaded
=
"
myFilterTBAge_Loaded
"
>
</
mytxtbxsrc:MyFilterTextBox
>
</
DataTemplate
>
</
data:DataGridTemplateColumn.CellEditingTemplate
>
</
data:DataGridTemplateColumn
>
Page.xaml全部代码如下:
Code
<UserControl xmlns:data="clr-namespace:System.Windows.Controls;assembly=System.Windows.Controls.Data" x:Class="SLApplicationDataTest.Page"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:myscreen="clr-namespace:SLApplicationDataTest"
xmlns:myconvert="clr-namespace:SLApplicationDataTest"
xmlns:mytxtbxsrc="clr-namespace:SLFilterTextBox;assembly=SLFilterTextBox"
Width="600" Height="300">
<UserControl.Resources>
<myconvert:InvalidToBrushConverter x:Key="myBrushConvert"/>
<myconvert:ErrMsgConverter x:Key="myErrMsgConvert"/>
</UserControl.Resources>
<Canvas x:Name="LayoutRoot" Width="600" Height="300" Background="Wheat">
<StackPanel x:Name="stackPeopleCenter" Height="300" Width="600" Background="White">
<StackPanel Orientation="Horizontal">
<Button x:Name="addButton" Content="Add" Margin="10"/>
<Button x:Name="deleteButton" Content="Delete" Margin="10"/>
</StackPanel>
<data:DataGrid x:Name="dgPeople" AutoGenerateColumns="False" BindingValidationError="dgPeople_BindingValidationError">
<data:DataGrid.Columns>
<data:DataGridTemplateColumn Header="Name">
<data:DataGridTemplateColumn.CellTemplate >
<DataTemplate>
<Border Background="{Binding Validator.InvalidName, Converter={StaticResource myBrushConvert }}"
ToolTipService.ToolTip="{Binding Validator, Converter={StaticResource myErrMsgConvert},,ConverterParameter=Name}">
<TextBlock Text="{Binding Name}" ></TextBlock>
</Border>
</DataTemplate>
</data:DataGridTemplateColumn.CellTemplate>
<data:DataGridTemplateColumn.CellEditingTemplate>
<DataTemplate>
<TextBox Text="{Binding Name , Mode=TwoWay, NotifyOnValidationError=True, ValidatesOnExceptions=True}"
Background="{Binding Validator.InvalidName, Converter={StaticResource myBrushConvert}}"
ToolTipService.ToolTip="{Binding Path=Validator, Converter={StaticResource myErrMsgConvert}, ConverterParameter=Name}"
Tag="Name">
</TextBox>
</DataTemplate>
</data:DataGridTemplateColumn.CellEditingTemplate>
</data:DataGridTemplateColumn>
<data:DataGridTemplateColumn Header="Sex">
<data:DataGridTemplateColumn.CellTemplate >
<DataTemplate>
<Border Background="{Binding Validator.InvalidSex, Converter={StaticResource myBrushConvert}}"
ToolTipService.ToolTip="{Binding Path=Validator, Converter={StaticResource myErrMsgConvert}, ConverterParameter=Sex}">
<TextBlock Text="{Binding Sex}"></TextBlock>
</Border>
</DataTemplate>
</data:DataGridTemplateColumn.CellTemplate>
<data:DataGridTemplateColumn.CellEditingTemplate>
<DataTemplate>
<TextBox Text="{Binding Sex , Mode=TwoWay, NotifyOnValidationError=True, ValidatesOnExceptions=True}"
Background="{Binding Validator.InvalidSex, Converter={StaticResource myBrushConvert}}"
ToolTipService.ToolTip="{Binding Path=Validator, Converter={StaticResource myErrMsgConvert}, ConverterParameter=Sex}"
Tag="Sex">
</TextBox>
</DataTemplate>
</data:DataGridTemplateColumn.CellEditingTemplate>
</data:DataGridTemplateColumn>
<data:DataGridTemplateColumn Header="Age">
<data:DataGridTemplateColumn.CellTemplate >
<DataTemplate>
<Border Background="{Binding Validator.InvalidAge, Converter={StaticResource myBrushConvert}}"
ToolTipService.ToolTip="{Binding Path=Validator, Converter={StaticResource myErrMsgConvert}, ConverterParameter=Age}">
<TextBlock Text="{Binding Age}"></TextBlock>
</Border>
</DataTemplate>
</data:DataGridTemplateColumn.CellTemplate>
<data:DataGridTemplateColumn.CellEditingTemplate>
<DataTemplate>
<mytxtbxsrc:MyFilterTextBox x:Name="myFilterTBAge" Text="{Binding Age , Mode=TwoWay, NotifyOnValidationError=True, ValidatesOnExceptions=True}"
Background="{Binding Validator.InvalidAge, Converter={StaticResource myBrushConvert}}"
Loaded="myFilterTBAge_Loaded">
</mytxtbxsrc:MyFilterTextBox>
</DataTemplate>
</data:DataGridTemplateColumn.CellEditingTemplate>
</data:DataGridTemplateColumn>
<data:DataGridTextColumn Header="Address" Binding="{Binding Address}" />
</data:DataGrid.Columns>
</data:DataGrid>
</StackPanel>
<myscreen:PleaseWaitValidate x:Name="myWaitingSexValidateScreen" Visibility="Collapsed" Margin="8,2,2,2" Width="300" Height="150">
</myscreen:PleaseWaitValidate>
</Canvas>
</UserControl>
修改后台代码，Page.xaml.cs如下：
引入空间:
using
SLFilterTextBox;
定义myFilterTBAge_Loaded事件处理程序:
private
void
myFilterTBAge_Loaded(
object
sender, RoutedEventArgs e)
{
((MyFilterTextBox)sender).MyFilter
=
SLFilterTextBox.TextBoxFilterType.PositiveInteger;
//
设定MyFilterTextBox控件的过滤属性
}
Page.xaml.cs全部代码如下:
Code
using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Animation;
using System.Windows.Shapes;
using System.Windows.Browser; //因为要使用HtmlPage.Window.Alert(message));
using SLFilterTextBox;
namespace SLApplicationDataTest
{
public partial class Page : UserControl
{
People mypeople;
public Page()
{
InitializeComponent();
this.addButton.Click += new RoutedEventHandler(addButton_Click);
this.deleteButton.Click += new RoutedEventHandler(deleteButton_Click);
this.dgPeople.KeyDown += new KeyEventHandler(peopleDataGrid_KeyDown);
Loaded += new RoutedEventHandler(Page_Loaded);
}
private void Page_Loaded(object sender, RoutedEventArgs e)
{
取得数据源数据并绑定到DataGrid控件上#region 取得数据源数据并绑定到DataGrid控件上
mypeople = People.GetTestData();
this.dgPeople.ItemsSource = mypeople;
#endregion
}
通过按钮添加新记录行#region 通过按钮添加新记录行
void addButton_Click(object sender, RoutedEventArgs e)
{
// mypeople.Add(new Person());
mypeople = mypeople.AddNewPerson();
}
#endregion
通过按钮删除记录#region 通过按钮删除记录
void deleteButton_Click(object sender, RoutedEventArgs e)
{
DeletePerson();
}
#endregion
删除记录子程序#region 删除记录子程序
private void DeletePerson()
{
if (null == this.dgPeople.SelectedItem)
{
return;
}
Person person = this.dgPeople.SelectedItem as Person;
if (null == person)
{
return;
}
mypeople.Remove(person);
}
#endregion
处理键盘响应事件#region 处理键盘响应事件
void peopleDataGrid_KeyDown(object sender, KeyEventArgs e)
{
如果是Insert键，则做插入新行操作#region 如果是Insert键，则做插入新行操作
if (Key.Insert == e.Key)
{
mypeople.Add(new Person());
}
#endregion
如果是Delete键，则做删除操作#region 如果是Delete键，则做删除操作
if (Key.Delete == e.Key)
{
DeletePerson();
}
#endregion
}
#endregion
校验错误处理程序#region 校验错误处理程序
private void TextBox_BindingValidationError(object sender, ValidationErrorEventArgs e)
{
if (e.Action == ValidationErrorEventAction.Added)
{
//如果校验出错，则抛出错误提示窗口
((Control)e.OriginalSource).Background = new SolidColorBrush(Colors.Red);
((Control)e.OriginalSource).SetValue(ToolTipService.ToolTipProperty, e.Error.Exception.Message);
((Control)e.OriginalSource).Focus();
this.Dispatcher.BeginInvoke(() => HtmlPage.Window.Alert(e.Error.Exception.Message));
}
else if (e.Action == ValidationErrorEventAction.Removed)
{
//如果校验通过，则做如下处理
((Control)e.OriginalSource).Background = new SolidColorBrush(Colors.White);
((Control)e.OriginalSource).SetValue(ToolTipService.ToolTipProperty, null);
}
}
#endregion
打开与关闭“等待校验窗口”#region 打开与关闭“等待校验窗口”
public void StartWait(string message)
{
this.myWaitingSexValidateScreen.DataContext = message;
this.myWaitingSexValidateScreen.StartWait();
}
public void EndWait(string message)
{
this.myWaitingSexValidateScreen.DataContext = message;
this.myWaitingSexValidateScreen.StopWait();
}
#endregion
private void dgPeople_BindingValidationError(object sender, ValidationErrorEventArgs e)
{
if (e.Action == ValidationErrorEventAction.Added)
{
Person person = ((Control)e.OriginalSource).DataContext as Person;
if (null != person && null != ((Control)e.OriginalSource).Tag)
{
person.Validator.RegisterError(((Control)e.OriginalSource).Tag.ToString(), e.Error.Exception.Message);
}
//((Control)e.Source).Background = new SolidColorBrush(Colors.Red);
//((Control)e.Source).SetValue(ToolTipService.ToolTipProperty, e.Error.Exception.Message);
}
else if (e.Action == ValidationErrorEventAction.Removed)
{
Person person = ((Control)e.OriginalSource).DataContext as Person;
if (null != person && null != ((Control)e.OriginalSource).Tag)
{
person.Validator.ClearError(((Control)e.OriginalSource).Tag.ToString());
}
//((Control)e.Source).Background = new SolidColorBrush(Colors.White);
//((Control)e.Source).SetValue(ToolTipService.ToolTipProperty, null);
}
}
private void myFilterTBAge_Loaded(object sender, RoutedEventArgs e)
{
((MyFilterTextBox)sender).MyFilter = SLFilterTextBox.TextBoxFilterType.PositiveInteger; //设定MyFilterTextBox控件的过滤属性
}
}
}
生成项目后运行，然后在Age框内输入数字，可以看到它只接受正整数，录入其它的字符均无反应。
SilverLight学习笔记--实际应用(一) 源代码下载
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