C#

Itextsharp removes PDF encryption and itextsharppdf Encryption When you operate a PDF file, you will encounter the problem that the PDF file is encrypted and cannot be operated. Search for the information from the network for the morning and click

Ext. Net TextField Enter event, ext. nettextfield (1) DirectEvents triggers the background CS Background: Protected void txtUpc_KeyPress (object sender, DirectEventArgs e){String key = e. ExtraParams ["keynum"]. ToString ();If (key = "13 "){ // Do }

C # object-oriented -- Inheritance, Inheritance: A combination of code and text Class Program {static void Main (string [] args) {// Student s = new Student (); // Driver d = new Driver (); student s = new Student ("Student", 18, 'mal', 101 );}} ///

C # copying large files, How to copy and read large files may be confusing for many people for a long time. I don't know how to do this. It is really a headache. Once you know it, you will find it so simple, go straight to the topic '''' Static void

List comparison, List For the comparison of types, the original comparison of linq cannot be distinguished. Query the intersection of two lists. Intersection. The function of the Union is directly written using Linq. It is not written here. List

[C #6] 1-using static,0. Directory C #6 Add feature catalog1. Old Version code 1 using System; 2 3 namespace csharp6 4 { 5 internal class Program 6 { 7 private static void Main(string[] args) 8 { 9

C # language basics-struct and enumeration types, Struct and enumeration types I. struct) The structure type is a type defined by the user. It is composed of other types, it can contain constructors, constants, fields, methods, attributes, indexers,

Record the improper use of SortedDictionary once, sorteddictionary At first, I wanted to use SortedDictionary to play the ranking in the game. The Code is as follows: using UnityEngine;using System;using System.Collections;using

Date comparison, js date comparison SQL statement: 1234 1) select * from TableName where StartTime> '2017-04-08'2) select * from TableName where StartTime> = '2017-04-08'3) select * from TableName where StartTime 4) select * from

C # Write lottery questions, Enter the winning number of each person and scroll the display. // clear the screen. // an index is displayed immediately. // print the number based on the index. // wait for 0.1 seconds.Console. Write ("Enter the number

Ado.net access excel, ado. netexcel Class 1: OleDbConnection... 2 connection string: Provider = Microsoft. ACE. OLEDB.12.0; Data source1_excelpath.xlsx}; Extended Properties = "Excel 12.0 Xml; HDR = NO; IMEX = 1 ;" Note: 1). The connection

C # solve the verification code problem, String ss = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789 ";Random a = new Random ();Int B;String yan = "";For (int I = 0; I {B = a. Next (62 );Yan + = ss. Substring (B, 1 );}Console.

JavaScriptSerializer and DataContractJsonSerializer are different. JavaScriptSerializerNamespace: using System. web. script. serialization; you do not need to manually add references. Serialization of the Dictionary type is not supported. You do not

C # read/write shared folders,The test involves the following steps: 1. Set a shared folder on the server. Here, my server IP address is 10.200.8.73, the shared folder name is share, and the access permission is. The username is administrator and

Osharp3 experience: Integration of DbContextScope 1, 3 Osharp3's transaction processing is controlled by skipping the savechangeing method, without DbContextScope expertise DbContextScope Advantages and Disadvantages of dbcontext management this

Use C #'s built-in component strong program logs, If errors, exceptions, or crashes occur after the project is officially launchedThe first thing we often think of is to view logs.Therefore, logs are very important for the maintenance of a

C # two-color ball-Simple selection of winning numbers, Int [] ss = new int [6];Random s = new Random ();Console. WriteLine ("two-color ball random :");For (int I = 0; I {Bool B = true;Int a = s. Next (1, 34 );For (int j = 0; j {If (a = ss [j]){B =

The reprinted file is being used by another process and cannot be accessed by this process. Address: http://www.cnblogs.com/enjoyprogram/p/4344799.html   Exception prompt: "The file is being used by another process and the process cannot access the

WebSocket transmits images and websocket transmits images. At the beginning of this article, I wanted to develop a simple live video system. However, it is still difficult to use Html5 + WebSocket. This article only connects to the image collection>

Overview of WebApi framework and webapi framework The WebApi framework can be divided into three layers: The management layer, the message processing program management layer, and the Controller processing layer.   I. Hosting layer: That is, the