WP开发的基础知识小结

（1）C#中string[]数组和list<string>泛型的相互转换

从string[]转list<string>

string[] str = {"1","2"};

list<string> list =newlist<string>(str);

从list<string>转string[]

list<string> list=newlist<string>;

string[] str=list.toarray();

（2）关于wp7中的ApplicationBar的图片一直显示不出来

解决方法： 图片的生成操作改为内容。

（3）通过资源类来绑定资源， 步骤：

a.在程序 App.xml中添加通用类或属性xml:Generic.xaml

<!--Application Resources-->

< Application.Resources >

< ResourceDictionary >

< ResourceDictionary.MergedDictionaries >

< ResourceDictionary Source ="Generic.xaml"/>

< ResourceDictionary Source ="Themes/Res.xaml"/>

</ ResourceDictionary.MergedDictionaries >

</ ResourceDictionary >

</ Application.Resources >

b. 创建generic.xaml，在其中添加关键属性，该属性对应为程序中的一个类(对象)，如下面的LocalizedStrings:

<?xml version="1.0" ?>

<ResourceDictionary

xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"

xmlns:sys="clr-namespace:System;assembly=mscorlib"

xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"

xmlns:zds="clr-namespace:Calendar.Resources">

<zds:LocalizedStringsx:Key="LocalizedStrings"/>

</ResourceDictionary>

c.创建字典对应的类 LocalizedStrings, 其中Appress是资源类 ：

using System;

using System.Net;

using System.Windows;

using System.Windows.Controls;

using System.Windows.Documents;

using System.Windows.Ink;

using System.Windows.Input;

using System.Windows.Media;

using System.Windows.Media.Animation;

using System.Windows.Shapes;

namespace Calendar.Resources

{

public class LocalizedStrings

{

public LocalizedStrings() { }

private static AppRes localizedResources = new AppRes ();

public AppRes LocalizedResources

{

get

{

return localizedResources;

}

}

}

}

d.实现控件的属性绑定 (path,source)

<zdc:ToolsTemplateTilex:Name="test"Grid.Column="0"Grid.Row="0"

TemplateTitle="{BindingPath=LocalizedResources.MenstrualCyclesTitle,Source={StaticResourceLocalizedStrings}}"

Click="OnTempalteTileClick" />

（4） 跨工程添加资源的问题： http://forums.silverlight.net/t/186827.aspx

<!--Application Resources-->

< Application.Resources >

< ResourceDictionary >

< ResourceDictionary.MergedDictionaries >

< ResourceDictionary Source ="/ZDWorksCommon;component/Themes/Generic.xaml"/>

< ResourceDictionary Source ="Generic.xaml"/>

< ResourceDictionary Source ="Themes/Res.xaml"/>

</ ResourceDictionary.MergedDictionaries >

</ ResourceDictionary >

</ Application.Resources >

如果加载的路径不正确，vs则会提示

（5）关于计算日期的天数间隔

一种方法是把日期后面的时分秒置为零：

a.DateTimet1 =newDateTime(curDate.Year, curDate.Month, curDate.Day);

DateTime t2 = new DateTime (cmpDate.Year, cmpDate.Month, cmpDate.Day);

int daysInterval = (t2-t1).Days;

b. curDate -= curDate.TimeOfDay;

cmpDate -= cmpDate.TimeOfDay;

int daysInterval = ( curDate - cmpDate ).Days;

（6）关于控件样式的等价问题

< Style x : Name ="ToolsRootGridStyle" TargetType ="Grid">

< Setter Property ="Grid.Background">

< Setter.Value >

< ImageBrush ImageSource ="/Images/Common/background.jpg" Stretch ="None"/>

</ Setter.Value >

</ Setter >

</ Style >

< Grid x : Name ="LayoutRoot" Style ="{ StaticResource ToolsRootGridStyle }"/>

等价于：

< Grid x : Name ="LayoutRoot">

<Grid.Backgroud>

<ImageBrushImageSource="/Images/Common/background.jpg"Stretch="None"/>

</Grid.Backgroud>

</Grid>

（7）自定义Eventhandler的参数

a.定义参数类

usingSystem;

using System.Net;

using System.Windows;

using System.Windows.Controls;

using System.Windows.Documents;

using System.Windows.Ink;

using System.Windows.Input;

using System.Windows.Media;

using System.Windows.Media.Animation;

using System.Windows.Shapes;

namespace Calendar.Controls

{

public class AlmanacSelectionChangedEventArgs : EventArgs

{

private AlmanacSelectionChangedEventArgs() { }

internal AlmanacSelectionChangedEventArgs( AlmanacInfo selectedAlmanac)

{

SelectedAlmanac = selectedAlmanac;

}

public AlmanacInfo SelectedAlmanac { get ; private set ; }

}

}

b.定义委托事件， 装载参数：

public event EventHandler < AlmanacSelectionChangedEventArgs > SelectionChanged;

privatevoidOnDoneButtonClick(objectsender,EventArgsargs)

{

SelectionChanged(sender,newAlmanacSelectionChangedEventArgs(m_SelectedItem));

}

c.注册事件响应，获取参数：

AlmanacPickerPagealmanacPage = e.ContentasAlmanacPickerPage;

if(null!= almanacPage)

{

almanacPage.SelectionChanged += OnSelectionChanged;

}

privatevoidOnSelectionChanged(objectsender,AlmanacSelectionChangedEventArgse)

{

m_AlmanacSelected = e.SelectedAlmanac;

}

(8) 关于ListPicker样式与数据绑定

首先是声明绑定数据源：

<Stylex:Key="AlmanacLPStyle"TargetType="tk:ListPicker">

< Setter Property ="FullModeItemTemplate">

< Setter.Value >

< DataTemplate >

< StackPanel Orientation ="Horizontal" Width ="480" Height ="80" Background ="Blue">

< TextBlock x : Name ="YiBlock" Text ="{ Binding YiName }" Foreground ="Green" VerticalAlignment ="Center"/>

< TextBlock x : Name ="JiBlock" Text ="{ Binding JiName }" Foreground ="Brown" VerticalAlignment ="Center" />

</ StackPanel >

</ DataTemplate >

</ Setter.Value >

</ Setter >

</ Style >

接着需要做的是定义一个类：

publicclasss A

{

publicstringYiName ｛get；set；｝

publicstringJiName｛get；set；｝

}

然后定义一个数据源：

List<A> list =newList<A>();

list.Add(newA() { YiName ="11", JiName="22"});

list.Add(newA() { YiName ="12", JiName="42"});

YiOrJiSelectLP.ItemSource = list;