Windows Phone 7项目实战之记事本（二）

　　Windows Phone 7记事本的第二部分讲解记事本的基本功能。

　　功能点：　

　　1.添加日记功能

　　2.修改日记功能

　　3.删除日记功能

　　4.简单帮助功能

　　5.显示已写日记列表功能

　　一、显示已写日记列表功能

　　1.新建Note类，包含日记文件的相关信息，供我们做数据绑定使用。如下

　　　　 public class Note
　　{

　　　　　　//文件创建日期
　　public string DateCreated { get; set; }

　　　　　　//文件全名（包含日期）
　　public string FileFullName { get; set; }

　　　　　　//我们命名的文件名
　　public string FileName { get; set; }
　　}

　　2.修改MainPage页面

　　首先我们在MainPage页面中添加如下XAML标记，以显示已写日记列表。

</DataTemplate>
</ListBox.ItemTemplate>
</ListBox>

　　说明：我们定义一个ListBox对象，用来显示已写日记列表，在它的模板中，我们包含了一个HyperlinkButton和一个TextBlock对象，其中HyperlinkButton对象用来显示我们日记的名称，它的Tag绑定了Note对象的FileFullName属性，Content属性绑定了Note对象的FileName属性，通过点击它可以导航到编辑日记界面，这样我们就可以编辑我们的日记了。TextBlock对象用来显示我们创建日记的日期，Text属性绑定了Note对象的DateCreated属性。下面我们看一下HyperlinkButton的noteLocation_Click事件。

　　　　 private void noteLocation_Click(object sender, RoutedEventArgs e)
{
HyperlinkButton clickedLink = (HyperlinkButton)sender;

　　　　　　//将clickedLink的Tag值传到ViewEdit.xaml页面中。　　　　　　　　　　　　
string uri = string.Format("/XapNote;component/ViewEdit.xaml?id={0}", clickedLink.Tag);

NavigationService.Navigate(new Uri(uri, UriKind.Relative));
}

private void bindList()
        {
            var appStorage = IsolatedStorageFile.GetUserStoreForApplication();
            List<Note> notes = new List<Note>();

            string[] fileList = appStorage.GetFileNames();

foreach (var file in fileList)
            {
                if (file != "__ApplicationSettings")
                {
                    //2010_12_30_14_02_01_ddd.txt　　文件全名的格式，2010_12_30_14_02_01是创建日记的日期，ddd是我们命名的日记名。下面就是从文件全名中截取信息
                    string fileFullName = file;

string year = file.Substring(0, 4);
                    string month = file.Substring(5, 2);
                    string day = file.Substring(8, 2);
                    string hour = file.Substring(11, 2);
                    string minute = file.Substring(14, 2);
                    string second = file.Substring(17, 2);
                    DateTime dateTime = new DateTime(int.Parse(year), int.Parse(month), int.Parse(day), int.Parse(hour), int.Parse(minute), int.Parse(second));
                    string dateCreated = dateTime.ToString("yyyy年MM月dd日 HH:MM:ss");
                    string fileName = file.Substring(20);

fileName = fileName.Substring(0, fileName.Length - 4);

notes.Add(new Note() { FileFullName = fileFullName, DateCreated = dateCreated, FileName = fileName });
}
}

noteListBox.ItemsSource = notes;
}

　　说明：由于我们写的日记保存在独立存储空间内，所以我们首先获取程序的IsolatedStorageFile对象，通过 appStorage.GetFileNames()方法我们可以获得程序的独立存储空间中的所有文件，这些文件中包含一个系统自带的设置文件"__ApplicationSettings"所以将其排除，然后从文件中截取字符串来获取日期，和我们定义的文件名，以供我们使用，然后将截取到的信息保存在Note对象中，来绑定数据到ListBox对象。在PhoneApplicationPage_Loaded方法中调用此方法。

　　二、简单帮助功能

　　1.修改MainPage页面

　　在xaml文件添加如下标记

<ScrollViewer Name="helpScrollViewer"
                              Width="400"
                              Height="300"
                              Canvas.Left="0"
                              Canvas.Top="100">
                    <TextBlock Name="helpTextBlock" Foreground="Black" FontSize="24" Height="500" TextWrapping="Wrap">
                        这个记事本允许你写简单的日记，并且将其保存,显示你创建日记的日期和地点。
                        <LineBreak></LineBreak>
                        <LineBreak></LineBreak>
                        点击日记名称，可以打开并编辑该日记。
                        <LineBreak></LineBreak>
                        <LineBreak></LineBreak>
                        点击应用程序下面的添加图标可以写日记。
                        <LineBreak></LineBreak></TextBlock>
                </ScrollViewer>
                <TextBlock TextAlignment="Center" Foreground="Black" Canvas.Left="0" Canvas.Top="10" Height="30" Text="帮助" Width="59" />
                <Button x:Name="btnClose"
                        Click="btnClose_Click"
                        Width="50"
                        Height="50"
                        Canvas.Left="350"
                        Canvas.Top="0">
                    <Button.Background>
                        <ImageBrush ImageSource="/Images/appbar.close.rest.png" Stretch="None" />
                    </Button.Background>
                </Button>
            </Canvas>

　　　　......

　　　　 <phone:PhoneApplicationPage.ApplicationBar>
        <shell:ApplicationBar IsVisible="True" IsMenuEnabled="True">
            <shell:ApplicationBarIconButton IconUri="/Images/appbar.add.rest.png" Text="添加" Click="Appbar_Add_Click"/>
            <shell:ApplicationBarIconButton IconUri="/Images/appbar.questionmark.rest.png" Text="帮助" Click="Appbar_Help_Click"/>
        </shell:ApplicationBar>
    </phone:PhoneApplicationPage.ApplicationBar>

　　说明：我们首先定义一个Canvas对象，初始化设置为隐藏Visibility="Collapsed"，当点击MainPage页面中的帮助图标时它将显示，它里面包含了ScrollViewer对象，此对象中的TextBlock用来显示帮助信息。还有一个Button，当点击它的时候此Canvas对象隐藏。由于此功能只是Canvas对象显示与隐藏的特点，所以不再赘述，有兴趣的朋友可以下载我的代码，自己看看。

　　完整MainPage.xaml文件代码如下：

<phone:PhoneApplicationPage
    x:Class="XapNote.MainPage"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:phone="clr-namespace:Microsoft.Phone.Controls;assembly=Microsoft.Phone"
    xmlns:shell="clr-namespace:Microsoft.Phone.Shell;assembly=Microsoft.Phone"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    mc:Ignorable="d" d:DesignWidth="480" d:DesignHeight="696"
    FontFamily="{StaticResource PhoneFontFamilyNormal}"
    FontSize="{StaticResource PhoneFontSizeNormal}"
    Foreground="{StaticResource PhoneForegroundBrush}"
    SupportedOrientations="PortraitOrLandscape" Orientation="Portrait"
    shell:SystemTray.IsVisible="True" Loaded="PhoneApplicationPage_Loaded">

<Grid x:Name="LayoutRoot" Background="Transparent">
        <Grid.RowDefinitions>
            <RowDefinition Height="Auto"/>
            <RowDefinition Height="*"/>
        </Grid.RowDefinitions>

<StackPanel x:Name="TitlePanel" Grid.Row="0" Margin="12,17,0,28">
            <TextBlock x:Name="ApplicationTitle" Text="记事本" Style="{StaticResource PhoneTextNormalStyle}" FontSize="30" />
            <TextBlock x:Name="PageTitle" Text="我的日记" Margin="9,-7,0,0" TextAlignment="Center" FontSize="22"/>
        </StackPanel>

<Grid x:Name="ContentPanel" Grid.Row="1" Margin="12,0,12,0">
            <ListBox HorizontalAlignment="Stretch" VerticalAlignment="Stretch"
                     x:Name="noteListBox">
                <ListBox.ItemTemplate>
                    <DataTemplate>
                        <StackPanel>
                            <HyperlinkButton x:Name="noteLocation"
                                             FontSize="32"
                                             Content="{Binding FileName}"
                                             Tag="{Binding FileFullName}"
                                             Click="noteLocation_Click">
                            </HyperlinkButton>
                            <TextBlock Name="noteDateCreated"
                                       Text="{Binding DateCreated}"
                                       Margin="10">
                            </TextBlock>
                        </StackPanel>

</DataTemplate>
</ListBox.ItemTemplate>
</ListBox>

</phone:PhoneApplicationPage>

完整MainPage.cs代码如下：

public partial class MainPage : PhoneApplicationPage
{
#region 构造器

public MainPage()
        {
            InitializeComponent();
        }

#endregion

#region Appbar 事件

#region 添加事件

private void Appbar_Add_Click(object sender, EventArgs e)
{
NavigationService.Navigate(new Uri("/XapNote;component/Add.xaml", UriKind.Relative));

#region 注销掉（测试用）
            /*
                           //0123456789012345678901234567890123456789
            string fileName="2010_12_29_13_43_01_Woo_Gankyang-CHN.txt";
            string fileContent = "我的日记";

var appStorage = IsolatedStorageFile.GetUserStoreForApplication();

if (!appStorage.FileExists(fileName))
            {
                using (var file = appStorage.CreateFile(fileName))
                {
                    using (var writer = new StreamWriter(file))
                    {
                        writer.WriteLine(fileContent);
                    }
                }
            }

bindList();
* */

#endregion
}

#endregion

#region 帮助事件

private void Appbar_Help_Click(object sender, EventArgs e)
        {
            this.helpCanvas.Visibility = Visibility.Visible;
        }

#endregion

#region 程序加载事件

private void PhoneApplicationPage_Loaded(object sender, RoutedEventArgs e)
        {
            IsolatedStorageSettings settings = IsolatedStorageSettings.ApplicationSettings;
            string state = "";

if (settings.Contains("state"))
            {
                if (settings.TryGetValue<string>("state", out state))
                {
                    if (state == "add")
                    {
                        NavigationService.Navigate(new Uri("/Add.xaml", UriKind.Relative));
                    }

else if (state == "edit")
                    {
                        NavigationService.Navigate(new Uri("/ViewEdit.xaml", UriKind.Relative));
                    }
                }
            }

bindList();
}

#endregion

#region ListBox绑定数据

foreach (var file in fileList)
            {
                if (file != "__ApplicationSettings")
                {
                    //2010_12_30_14_02_01_ddd.txt
                    string fileFullName = file;

fileName = fileName.Substring(0, fileName.Length - 4);

notes.Add(new Note() { FileFullName = fileFullName, DateCreated = dateCreated, FileName = fileName });
}
}

noteListBox.ItemsSource = notes;
}

#endregion

#region HyperlinkButton事件

private void noteLocation_Click(object sender, RoutedEventArgs e)
        {
            HyperlinkButton clickedLink = (HyperlinkButton)sender;
            string uri = string.Format("/XapNote;component/ViewEdit.xaml?id={0}", clickedLink.Tag);

NavigationService.Navigate(new Uri(uri, UriKind.Relative));
}

#endregion

#region 关闭帮助事件

private void btnClose_Click(object sender, RoutedEventArgs e)
        {
            this.helpCanvas.Visibility = Visibility.Collapsed;
        }

#endregion
}

　　二、添加日记功能

　　1.Appbar_Add_Click事件,导航到Add.xaml页面

　　　　private void Appbar_Add_Click(object sender, EventArgs e)
{
NavigationService.Navigate(new Uri("/XapNote;component/Add.xaml", UriKind.Relative));

　　　　　}

　　2.Add.xaml页面

</Grid>
</Grid>

　　说明：displayTextBlock显示日记内容，editTextBox编辑日记内容，namedDialog是命名文件的对话框

　　1）Appbar_Save_Click事件

　　　　 private void Appbar_Save_Click(object sender, EventArgs e)
        {
            this.displayTextBlock.Text = this.editTextBox.Text;
            this.displayTextBlock.Visibility = Visibility.Visible;
            this.editTextBox.Visibility = Visibility.Collapsed;
            this.namedDialog.Visibility = Visibility.Visible;
        }

　　2）btnClear_Click事件

　　　　 private void btnClear_Click(object sender, RoutedEventArgs e)
        {
            this.fileNameTextBox.Text = "";
        }

　　3）btnOk_Click事件　　

　　　　 private void btnOk_Click(object sender, RoutedEventArgs e)
        {
            this.namedDialog.Visibility = Visibility.Collapsed;
            var appStorage = IsolatedStorageFile.GetUserStoreForApplication();

　　　　　　//构建文件全名

StringBuilder sb = new StringBuilder();
            sb.Append(DateTime.Now.Year);
            sb.Append("_");
            sb.Append(string.Format("{0:00}", DateTime.Now.Month));
            sb.Append("_");
            sb.Append(string.Format("{0:00}", DateTime.Now.Day));
            sb.Append("_");
            sb.Append(string.Format("{0:00}", DateTime.Now.Hour));
            sb.Append("_");
            sb.Append(string.Format("{0:00}", DateTime.Now.Minute));
            sb.Append("_");
            sb.Append(string.Format("{0:00}", DateTime.Now.Second));
            sb.Append("_");
            sb.Append(fileName);
            sb.Append(".txt");

fileFullName = sb.ToString();

try
{

　　　　　　　　//创建文件　　
                using (var fileStream = appStorage.OpenFile(fileFullName, FileMode.Create))
                {
                    using (StreamWriter writer = new StreamWriter(fileStream))
                    {

　　　　　　　　　　　　//向文件中写入内容
                      writer.WriteLine(this.editTextBox.Text);
                    }
                }
            }
            catch (Exception)
            {

}

navigateBack();
}

　　例如我们输入如图信息

　　将其保存，我们查看一下文件全名如图

　　4)fileNameTextBox_TextChanged事件

　　　　 this.fileName = this.fileNameTextBox.Text;

　　5）navigateBack()方法

　　　　 private void navigateBack()
{

　　　　　　NavigationService.Navigate(new Uri("/XapNote;component/MainPage.xaml", UriKind.Relative));
}

　　6）Appbar_Cancel_Click事件

　　　　 private void Appbar_Cancel_Click(object sender, EventArgs e)
        {
            navigateBack();
        }

　　完整Add.xaml代码如下：

<phone:PhoneApplicationPage
    x:Class="XapNote.Add"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:phone="clr-namespace:Microsoft.Phone.Controls;assembly=Microsoft.Phone"
    xmlns:shell="clr-namespace:Microsoft.Phone.Shell;assembly=Microsoft.Phone"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    FontFamily="{StaticResource PhoneFontFamilyNormal}"
    FontSize="{StaticResource PhoneFontSizeNormal}"
    Foreground="{StaticResource PhoneForegroundBrush}"
    SupportedOrientations="PortraitOrLandscape" Orientation="Portrait"
    mc:Ignorable="d" d:DesignHeight="696" d:DesignWidth="480"
    shell:SystemTray.IsVisible="True" Loaded="PhoneApplicationPage_Loaded">

<StackPanel x:Name="TitlePanel" Grid.Row="0" Margin="12,17,0,28">
            <TextBlock x:Name="ApplicationTitle" Text="记事本" FontSize="30"/>
            <TextBlock x:Name="PageTitle" Text="添加日记" Margin="9,-7,0,0" FontSize="22" TextAlignment="Center"/>
        </StackPanel>

<Grid x:Name="ContentPanel" Grid.Row="1" Margin="12,0,12,0">
            <TextBlock Name="displayTextBlock"
                        HorizontalAlignment="Stretch"
                        VerticalAlignment="Stretch"
                        Visibility="Collapsed">
            </TextBlock>
            <TextBox Name="editTextBox"
                     HorizontalAlignment="Stretch"
                     VerticalAlignment="Stretch"
                     TextChanged="editTextBox_TextChanged">
            </TextBox>
            <Canvas Name="namedDialog"
                    HorizontalAlignment="Left"
                    VerticalAlignment="Top"
                    Background="Red"
                    Margin="59,6,0,0"
                    Width="350"
                    Height="300"
                    Visibility="Collapsed">
                <TextBlock Text="请您输入日记名称"
                           Width="221"
                           Height="40"
                           TextWrapping="Wrap"
                           Canvas.Left="63"
                           Canvas.Top="27"
                           FontSize="27">
                </TextBlock>
                <TextBox   Name="fileNameTextBox"
                           Width="338"
                           Height="77"
                           TextWrapping="Wrap"
                           Canvas.Left="6"
                           Canvas.Top="97"
                           FontSize="27"
                           TextChanged="fileNameTextBox_TextChanged">
                </TextBox>
                <Button Name="btnOk"
                        Canvas.Left="0"
                        Canvas.Top="222"
                        Content="确定"
                        Width="150"
                        Click="btnOk_Click">
                </Button>
                <Button Name="btnClear"
                        Canvas.Left="194"
                        Canvas.Top="222"
                        Content="清除"
                        Width="150"
                        Click="btnClear_Click">
                </Button>
            </Canvas>

</Grid>
</Grid>

<phone:PhoneApplicationPage.ApplicationBar>
        <shell:ApplicationBar IsVisible="True" IsMenuEnabled="True">
            <shell:ApplicationBarIconButton IconUri="/Images/appbar.save.rest.png" Text="保存" Click="Appbar_Save_Click"/>
            <shell:ApplicationBarIconButton IconUri="/Images/appbar.cancel.rest.png" Text="取消" Click="Appbar_Cancel_Click"/>
        </shell:ApplicationBar>
    </phone:PhoneApplicationPage.ApplicationBar>
</phone:PhoneApplicationPage>

　　完整Add.cs如下：　　　

public partial class Add : PhoneApplicationPage
    {
        #region 私有变量
        private string fileFullName;
        private string fileName;
        IsolatedStorageSettings settings = IsolatedStorageSettings.ApplicationSettings;

#endregion

#region 构造器

public Add()
        {
            InitializeComponent();
        }

#endregion

#region Appbar事件

#region 保存日记事件

#endregion

#region 取消保存日记事件

private void Appbar_Cancel_Click(object sender, EventArgs e)
        {
            navigateBack();
        }

#endregion

#region 页面导航方法

private void navigateBack()
        {
            settings["state"] = "";
            settings["value"] = "";
            NavigationService.Navigate(new Uri("/XapNote;component/MainPage.xaml", UriKind.Relative));
        }

#endregion

#region 程序加载事件

private void PhoneApplicationPage_Loaded(object sender, RoutedEventArgs e)
{
string state = "";

if (settings.Contains("state"))
            {
                if (settings.TryGetValue<string>("state", out state))
                {
                    if (state == "add")
                    {

string value = "";
                        if (settings.Contains("value"))
                        {
                            if (settings.TryGetValue<string>("value", out value))
                            {
                                this.editTextBox.Text = value;
                            }
                        }
                    }
                }
            }

settings["state"] = "add";
            settings["value"] = this.editTextBox.Text;
            this.editTextBox.SelectionStart = this.editTextBox.Text.Length;
            this.editTextBox.Focus();
        }

#endregion

#region editTextBox_TextChanged

private void editTextBox_TextChanged(object sender, TextChangedEventArgs e)
        {
            settings["value"] = this.editTextBox.Text;
        }

#endregion

private void btnClear_Click(object sender, RoutedEventArgs e)
        {
            this.fileNameTextBox.Text = "";
        }

fileFullName = sb.ToString();

try
            {
                using (var fileStream = appStorage.OpenFile(fileFullName, FileMode.Create))
                {
                    using (StreamWriter writer = new StreamWriter(fileStream))
                    {
                        writer.WriteLine(this.editTextBox.Text);
                    }
                }
            }
            catch (Exception)
            {

}

navigateBack();
}

private void fileNameTextBox_TextChanged(object sender, TextChangedEventArgs e)
        {
            this.fileName = this.fileNameTextBox.Text;
        }
    }

　　四、修改日记功能

　　1.ViewEdit.xaml页面

<phone:PhoneApplicationPage
    x:Class="XapNote.ViewEdit"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:phone="clr-namespace:Microsoft.Phone.Controls;assembly=Microsoft.Phone"
    xmlns:shell="clr-namespace:Microsoft.Phone.Shell;assembly=Microsoft.Phone"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    FontFamily="{StaticResource PhoneFontFamilyNormal}"
    FontSize="{StaticResource PhoneFontSizeNormal}"
    Foreground="{StaticResource PhoneForegroundBrush}"
    SupportedOrientations="PortraitOrLandscape" Orientation="Portrait"
    mc:Ignorable="d" d:DesignHeight="696" d:DesignWidth="480"
    shell:SystemTray.IsVisible="True" Loaded="PhoneApplicationPage_Loaded">

<StackPanel x:Name="TitlePanel" Grid.Row="0" Margin="12,17,0,28">
            <TextBlock x:Name="ApplicationTitle" Text="记事本" FontSize="30"/>
            <TextBlock x:Name="PageTitle" Text="编辑日记" Margin="9,-7,0,0" FontSize="22" TextAlignment="Center"/>
        </StackPanel>

<phone:PhoneApplicationPage.ApplicationBar>
        <shell:ApplicationBar IsVisible="True" IsMenuEnabled="True">
            <shell:ApplicationBarIconButton IconUri="/Images/appbar.back.rest.png" Text="返回" Click="Appbar_Back_Click"/>
            <shell:ApplicationBarIconButton IconUri="/Images/appbar.edit.rest.png" Text="编辑" Click="Appbar_Edit_Click"/>
            <shell:ApplicationBarIconButton IconUri="/Images/appbar.save.rest.png" Text="保存" Click="Appbar_Save_Click"/>
            <shell:ApplicationBarIconButton IconUri="/Images/appbar.delete.rest.png" Text="删除" Click="Appbar_Delete_Click"/>
        </shell:ApplicationBar>
    </phone:PhoneApplicationPage.ApplicationBar>

</phone:PhoneApplicationPage>

　　2.Appbar_Edit_Click事件

　　　　if (this.displayTextBlock.Visibility == Visibility.Visible)
            {
                bindEdit(this.displayTextBlock.Text);
            }

　　3.bindEdit方法　　　　

　　private void bindEdit(string content)
        {
            this.editTextBox.Text = content;
            this.displayTextBlock.Visibility = Visibility.Collapsed;
            this.editTextBox.Visibility = Visibility.Visible;

this.editTextBox.Focus();
this.editTextBox.SelectionStart = this.editTextBox.Text.Length;
}

　　4.ppbar_Save_Click事件

　　　private void Appbar_Save_Click(object sender, EventArgs e)
        {
            if (this.editTextBox.Visibility == Visibility.Visible)
            {
                var appStorage = IsolatedStorageFile.GetUserStoreForApplication();

try
                {
                    using (var fileStream = appStorage.OpenFile(fileName, FileMode.Create))
                    {
                        using (StreamWriter writer = new StreamWriter(fileStream))
                        {
                            writer.WriteLine(this.editTextBox.Text);
                        }
                    }
                }
                catch (Exception)
                {

}

this.displayTextBlock.Text = this.editTextBox.Text;
                this.displayTextBlock.Visibility = Visibility.Visible;
                this.editTextBox.Visibility = Visibility.Collapsed;
            }
        }

　　五、删除日记功能

　　1.Appbar_Delete_Click事件

　 var appStorage = IsolatedStorageFile.GetUserStoreForApplication();
            appStorage.DeleteFile(fileName);
            this.confirmDialog.Visibility = Visibility.Collapsed;
            navigateBack();

　　ViewEdit.cs完整代码

　　public partial class ViewEdit : PhoneApplicationPage
{
#region 私有变量

private string fileName = "";
IsolatedStorageSettings settings = IsolatedStorageSettings.ApplicationSettings;

#endregion

#region 构造器

public ViewEdit()
        {
            InitializeComponent();
        }

#endregion

#region Appbar事件

#region 返回主界面事件

private void Appbar_Back_Click(object sender, EventArgs e)
        {
            navigateBack();
        }

#endregion

#region 编辑日记事件

private void Appbar_Edit_Click(object sender, EventArgs e)
        {
            if (this.displayTextBlock.Visibility == Visibility.Visible)
            {
                bindEdit(this.displayTextBlock.Text);
            }
        }

#endregion

#region 保存日记事件

}

#endregion

#region 删除日记事件

private void Appbar_Delete_Click(object sender, EventArgs e)
        {
            this.confirmDialog.Visibility = Visibility.Visible;
            // navigateBack();
        }

#endregion

#region 页面加载事件

private void PhoneApplicationPage_Loaded(object sender, RoutedEventArgs e)
{
string state = "";

if (settings.Contains("state"))
            {
                if (settings.TryGetValue<string>("state", out state))
                {
                    if (state == "edit")
                    {
                        string value = "";

if (settings.Contains("fileName"))
                        {
                            if (settings.TryGetValue<string>("fileName", out value))
                            {
                                fileName = value;
                            }
                        }

if (settings.Contains("value"))
                        {
                            if (settings.TryGetValue<string>("value", out value))
                            {
                                bindEdit(value);
                            }
                        }
                    }

else
                    {
                        bindView();
                    }
                }
            }

else
            {
                bindView();
            }
        }

#endregion

#region bindView

private void bindView()
        {
            if (NavigationContext.QueryString["id"] != null)
            {
                fileName = NavigationContext.QueryString["id"];
            }

var appStorage = IsolatedStorageFile.GetUserStoreForApplication();

try
            {
                using (var file = appStorage.OpenFile(fileName, FileMode.Open))
                {
                    using (StreamReader reader = new StreamReader(file))
                    {
                        displayTextBlock.Text = reader.ReadToEnd();
                    }
                }
            }
            catch (Exception)
            {

}

#endregion

#region bindEdit

this.editTextBox.Focus();
this.editTextBox.SelectionStart = this.editTextBox.Text.Length;

settings["state"] = "edit";
            settings["value"] = this.editTextBox.Text;
            settings["fileName"] = fileName;
        }

#endregion

#region 页面导航事件

private void navigateBack()
        {
            settings["state"] = "";
            settings["value"] = "";
            settings["fileName"] = "";
            NavigationService.Navigate(new Uri("/XapNote;component/MainPage.xaml", UriKind.Relative));
        }

#endregion

#region 取消删除事件

private void btnCancel_Click(object sender, RoutedEventArgs e)
        {
            this.confirmDialog.Visibility = Visibility.Collapsed;
        }

#endregion

#region 确定删除事件

private void btnOk_Click(object sender, RoutedEventArgs e)
        {
            var appStorage = IsolatedStorageFile.GetUserStoreForApplication();
            appStorage.DeleteFile(fileName);
            this.confirmDialog.Visibility = Visibility.Collapsed;
            navigateBack();
        }

#endregion

#region editTextBox_TextChanged

private void editTextBox_TextChanged(object sender, TextChangedEventArgs e)
        {
            settings["value"] = this.editTextBox.Text;
        }

#endregion

　　结束语：

　　　　本篇随笔就讲到这里，谢谢！

　　源码下载：

　　　　点击这里下载程序源码

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