[ C# ] C# 学习笔记 [ 持续更新 ]

//[<]
    //[@yymmdd:hh:mm]
    //[#Number]
    //[&Language]
    //[$Technique]
    //[keywords]
    //  "//["  and "//~" will be detected
//[>] < and > means comments, chars outside square brackets will be ignored

//[@20180715]

//[@20180715:22:39]:[#1]:[&C#][$WindowsFormsApp]
//[Check if object is disposed][检查对象是否已经释放]
    try {}
    catch (System.ObjectDisposedException) {}
//~[#1]

//[@20180715:22:42]:[#2]:[&C#][$WindowsFormsApp]
//[Add click event on form][添加点击窗体事件]
    public Form1()
    {
        InitializeComponent();
        fm = new Form2();
        this.FormClosing += Form1_Closing;
        this.Click += Form1_Click;
    }
//~[#2]

//~[@20180715]

//[@20180716]
//[@20180716:12:37]:[#1]:[&C#][$WindowsFormsApp]
//[Image.FromFile(string) will lock file][pictureBox用FromFile方法加载图片会锁住文件]
    FileStream fstrm = new FileStream(imageURL, FileMode.Open, FileAccess.Read);
    pictureBox1.Image = Image.FromStream(fstrm);
    //Close method will unlock the file
    fstrm.Close();
//~[#1]

//[@20180716:12:40]:[#2]:[&C#][$WindowsFromsApp]
//[Open current directory in exlorer][在windows文件浏览器中打开当前文件夹]
    System.Diagnostics.Process process = new System.Diagnostics.Process();
    process.StartInfo.UseShellExecute = true;
    process.StartInfo.FileName = @"explorer";
    process.StartInfo.Arguments = Directory.GetCurrentDirectory();
    process.Start();
//~[#2]

//[@20180716:13:59]:[#3]:[&C#][$using statement]
//[using statement will dispose <Variablename> when code block is done]
//[使用using可以自动销毁变量，C#会自动调用 Dispose()]
    using (<ClassName> <VariableName> = new <ClassName>())
    { ...  }
//~[#3]

//~[@20180716]

//[@20180717]

//[@20180717:23:55]:[#1]:[&C#][$string substring]
//[how to use stirng.substring method][string类substring方法]
     //Example: Get parent dirctory string
    public String test(String str)
    {
        //  C:\a\b\c\d\\ => C:\a\b\c => C:\a\b ..
        str=str.Substring(0,str.LastIndexOf(str,'\\'));
        return str;
    }
//~[#1]

//~[@20180717]