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摘要： there is no type cast in python, every conversion in python will create a new object. Not like in Java and C++, the original object will still be exist in the system.there are some of the built in functions in python to help the conversion. Such as:>>> int('123')123>>> int( 阅读全文

摘要： The bible or the most important principle of some thing or some people.the mantra of the python language is that, it must keep the programming language simple. 阅读全文

摘要： The value "None" in python is equivalent to the values in other languages such as "void", "NULL". 阅读全文

摘要： >>> download_complete = False>>> bool(download_complete)False>>> bool(-1.23)True>>> bool(0.0)False>>> bool("")False>>> bool([None, 0])True>>> bool([0, 0])True>>> bool({0, 0, 0})True>>> bool 0SyntaxError: inval 阅读全文

摘要： print('Python and %s are number %d' % ('Django', foo)) 阅读全文

摘要： This is referred to as “duck-typing”—if it waddles like a duck and quacks like a duck, then we can treat it as a duck.A very strong manner to determine the type of the variables of the python language. 阅读全文

摘要： 注意：热键和快捷键是整合在一起的应用中，我们可能会需要实现像Ctrl+C复制、Ctrl+V粘贴这样的快捷键，本文简单介绍了它的实现，并给出了一个实现类。（1）建立一个类文件，命名为HotKey.cs，代码如下：using System;using System.Collections.Generic;using System.Runtime.InteropServices;using System.Windows.Forms;namespace KoalaStudio.BookshopManager{ class HotKey { //如果函数执行成功，返回值不为0。 //如果函数执... 阅读全文

摘要： 在读写文件的过程中,Filestream只可以进行以字节为单位原始数据流进行读写操作,为此,C#中提供了功能更加强大的StreamReader/StreamWriter来支持文件的读写.StreamReader/StreamWriter可以进行以字符为单位的数据读写操作..一.用StreamReader的构造函数StreamReader有很多的构造函数:在这里只列出两个常用和比较常见的StreamReadersr=newStreamReader(Stream);Stream可以是Filestream;StreamReadersr=newStreamReader(String);String为指 阅读全文

摘要： 废话不多说，贴代码：public static void Export2Excel(DataTable dtTemp, string fileName, bool append = false, Encoding encoding = null) { if (encoding == null) { encoding = Encoding.Default; } using (var writer = new StreamWriter(fileName, append, encoding)) { foreach (DataColumn dc in dtTemp.Columns) { writer. 阅读全文

摘要： 这是一个用c#控制台程序下， 用XmlDocument 进行XML操作的的例子，包含了查询、增加、修改、删除、保存的基本操作。较完整的描述了一个XML的整个操作流程。适合刚入门.net XML操作的朋友参考和学习。假设有XML文件：books.xml<?xml version="1.0" encoding="UTF-8"?><books> <book> <name>哈里波特</name> <price>10</price> <memo>这是一本很好看的书。&l 阅读全文