摘要： 代码如下 : static void Main(string[] args) { Dictionary<int, int> di = new Dictionary<int, int>(); di.Add(9, 1); di.Add(0, 6); di.Add(2, 8); var sortedDict = (from entry in di orderby entry.Key ascending select entry) .T... 阅读全文

摘要： Just to clear up... or sum up...nchar and nvarchar can store Unicode characters.char and varchar cannot store Unicode characters.char and nchar are fixed-length which will reserve storage space for number of characters you specify even if you don't use up all that space.varchar and nvarchar are 阅读全文

摘要： function Binary_CheckSum对大小写敏感,想忽略大小写可用CheckSum.These functions are also valuable for comparing and indexing long string columns. Instead of creating an index on such column, you can add a column based onthe checksum or binary checksum of the value in the string column and index it instead. This typ 阅读全文

摘要： 要实现的效果是：tablepage中有一个datagridview,当用户鼠标点在datagridview列标题时，浮现一个textbox,比如当前列标题是姓名，那么用户输入张三，datagridview张三那行就被定位，变成selected状态 。具体代码如下：首先在窗体构造函数加2个delegate InitializeComponent(); dgv_compare.MouseHover+=new EventHandler(dgv_compare_MouseHover); dgv_compare.MouseLeave+=n... 阅读全文

摘要： // ==========================================================// Copy / paste routines//// - Floris van den Berg (flvdberg@wxs.nl)// - Alexander Dymerets (sashad@te.net.ua)// - Herv� Drolon (drolon@infonie.fr)// - Manfred Tausch (manfred.tausch@t-online.de)// - Riley McNiff (rmcniff@marexgroup.com)// 阅读全文

摘要： 程序如下:/* * This Code Was Created By Jeff Molofee 2000 * A HUGE Thanks To Fredric Echols For Cleaning Up * And Optimizing The Base Code, Making It More Flexible! * If You've Found This Code Useful, Please Let Me Know. * Visit My Site At nehe.gamedev.net */#include <w... 阅读全文

摘要： 可以用下面的小程序测试#include <iostream>float gf;int main(){ float lf; std::cout<<gf<<std::endl; std::cout<<lf<<std::endl; return 0;}显示结果是 0 1.4013e-045所以，全局变量不赋初值也可以，默认为0，局部变量不赋初值，不能当成0用。 阅读全文

摘要： 在多线程程序设计一书中,有这样的代码: WNDCLASS wc; memset(&wc, 0, sizeof(wc)); wc.lpfnWndProc = MainWndProc; wc.hInstance = hInstance; wc.hIcon = LoadIcon (hInstance, "GenIco"); wc.hCursor = LoadCursor(NULL,IDC_ARROW); wc.hbrBackground= GetSysColorBrush... 阅读全文