【windows phone】simple note

这已经是第三天的homework了，前两天总是可以很好的完成，但是今天缺卡克了。突然间发现自己缺失的东西太多了，比如using的一些用法，以前只知道using只是一个命名空间指令，并不知道using可以强制性释放对象，获取更多的内存。还有好多.net framework中的类库都不知道。比如IsolatedStorageFile类······现在只是可以看懂别人的一些代码，如果真正的让自己去写一些应用感觉真的很困难，突然想到数据结构老师说的一句话“中国的程序员好多都是在背代码，没有自己的创造力。”现在真的体会很深了，因为我就是其中的一个。以前社团让做一些东西，那些知识都是自己从来没学过的。或许做这些东西真的可以让自己很快的学会用某些知识。但是知识会用而已，真正的明白其中的原理吗？我不懂，知识看着别人是这样写的，自己也就跟着这样做，看着功能实现了，激动了半天。但是回头想想，这真的是自己的功劳？还不是窃取被人的代码来完成自己的功能？根据项目学东西真的只是只学到只是的点，而学不到知识的面。C#学好才是王道！！！唉！发了点牢骚，还是要把代码总结一下的！

simple note

前台代码：

        <Grid x:Name="ContentPanel" Grid.Row="1" Margin="12,0,12,0">
            <Button Content="edit" Height="72" HorizontalAlignment="Left" Margin="12,500,0,0" Name="editButton" VerticalAlignment="Top" Width="110" Click="editButton_Click" />
            <Button Content="save" Height="72" HorizontalAlignment="Left" Margin="128,500,0,0" Name="saveButton" VerticalAlignment="Top" Width="112" Click="saveButton_Click" />
            <Button Content="delete" Height="72" HorizontalAlignment="Left" Margin="246,500,0,0" Name="deleteButton" VerticalAlignment="Top" Width="128" Click="deleteButton_Click" />

                <TextBox Height="348" HorizontalAlignment="Left"
                         Margin="6,30,0,0" 
                         Name="EditTextBox1" 
                         Text="" 
                         VerticalAlignment="Top" 
                         Width="460" 
                         Canvas.Left="-18" 
                         Canvas.Top="-30"
                         TextWrapping="Wrap">
                    <TextBox.InputScope>
                        <InputScope>
                            <InputScopeName NameValue="Text"/>
                        </InputScope>
                    </TextBox.InputScope>
                </TextBox>
                <TextBlock Height="210" Name="myTextBlock" Text="" Width="410" FontSize="40" TextWrapping="Wrap" Canvas.Left="0" Canvas.Top="0" Margin="12,30,34,368"></TextBlock>
         
        </Grid>

后台代码：

    public partial class text : PhoneApplicationPage
    {
        public text()
        {
            InitializeComponent();
        }

        private void editButton_Click(object sender, RoutedEventArgs e)
        {
            ////设置myCanvas可见
            //myCanvas.Visibility = System.Windows.Visibility.Visible;
            ////设置TextBox焦点
            //EditTextBox1.Focus();
            ////设置myTextBlock隐藏
            //myTextBlock.Visibility = System.Windows.Visibility.Collapsed;

            if (myTextBlock.Visibility == System.Windows.Visibility.Visible)
            {
                EditTextBox1.Text = myTextBlock.Text;

                myTextBlock.Visibility = System.Windows.Visibility.Collapsed;
                EditTextBox1.Visibility = System.Windows.Visibility.Visible;
                EditTextBox1.Focus();
              
            }
           
        }

        private void saveButton_Click(object sender, RoutedEventArgs e)
        {
            ////设置TextBlock可见
            //myTextBlock.Visibility = System.Windows.Visibility.Visible;
            ////设置myCanvas隐藏
            //myCanvas.Visibility = System.Windows.Visibility.Collapsed;

            //myTextBlock.Text = EditTextBox1.Text.ToString();

            if (EditTextBox1.Visibility == System.Windows.Visibility.Visible)
            {
                savaNote();

                myTextBlock.Text = EditTextBox1.Text;
                myTextBlock.Visibility = System.Windows.Visibility.Visible;
                EditTextBox1.Visibility = System.Windows.Visibility.Collapsed;

            }
        }

        private void PhoneApplicationPage_Loaded(object sender, RoutedEventArgs e)
        {
            loadNote();
        }

        private void deleteButton_Click(object sender, RoutedEventArgs e)
        {
            EditTextBox1.Text = "";

            savaNote();

            myTextBlock.Text = "";
            myTextBlock.Visibility = System.Windows.Visibility.Visible;
            EditTextBox1.Visibility = System.Windows.Visibility.Collapsed;

        }

        private void loadNote()
        {
            var appStorage = IsolatedStorageFile.GetUserStoreForApplication();

            using (var fileStream = appStorage.OpenFile("note.txt", System.IO.FileMode.OpenOrCreate))
            {
                using (StreamReader sr = new StreamReader(fileStream))
                {
                    myTextBlock.Text = sr.ReadToEnd();
                }
            }
        }

        private void savaNote()
        {
            var appStorage = IsolatedStorageFile.GetUserStoreForApplication();
            using (var fileStream = appStorage.OpenFile("note.txt", FileMode.Create)) //FileMode如果文件不存在则创建一个文件
            {
                using(StreamWriter sw = new StreamWriter (fileStream))
                {
                    sw.WriteLine(EditTextBox1.Text);
                }
            }
        
        }

    }

最后再鼓励自己一句吧！“李子，不要走的太匆忙，一步一个脚印的往前走，成功最怕执着了。fighting！！！”