C#

C # 2.0 introduces many language extensions, most importantly generics (generics), anonymous methods (Anonymous Methods), iterators (iterators), and incomplete types (Partial Types).●Generics allow classes, structs, interfaces, delegates, and

1 /// 2 ///convert a DataTable to JSON3 /// 4 /// Dt5 /// JSON string6 Public stringDtb2json (DataTable dtb)7 {8JavaScriptSerializer JSS =NewJavaScriptSerializer ();9System.Collections.ArrayList dic

An unhandled exception occurred while making the control prone to encountering "error rendering control". Object references are not set to an instance of an object. "Such an error, such as: (It is also possible that this error is caused simply

This article describes the menu controls that use the CSS and UL list to display menus, resulting in small HTML, no JavaScript support, and support for most browsers, except IE6 to modify the CSS individually. This article can be used to understand

The implementation method is as follows: 1, the main idea is: reference using the System.Drawing namespace, using the graphics FromImage method to create a canvas, while setting the width and height of the canvas, and then through the graphics

First, download zxing.net Address is: http://zxingnet.codeplex.com/releases/view/117068 The corresponding version of the. dll is then dragged into the project and then referenced. Mainly with Barcodewriter, Barcodereader. Second, generate

Recently, since all logs for user operations in the system need to be backed up in a company project, the final decision is to back up the log data to Excel, considering that it may need to be restored later. Here is all the code in my project

The examples in this article describe how c#.net programs create access files and Excel files. Share to everyone for your reference, as follows: Some systems may need to export data to an Access or Excel file format for easy data transfer, printing,

CheckCode.cs Using System; Using System.Data; Using System.Configuration; Using System.Web; Using System.Web.Security; Using System.Web.UI; Using System.Web.UI.WebControls; Using System.Web.UI.WebControls.WebParts; Using System.Web.UI.HtmlControls;

The general method of making verification code effect on website is: 1) Use HttpHandler (general handler) to draw a graph of random verification code, and generate random code, and output to the outputstream of the page. 2) in the page using

Implementation code ///Generate Verification code picture, save session name Verificationcode/// public static void Createverific Ationcode () {int number; String Checkcode = String. Empty; Random number of seeds random randoms

The first is to create a new verification code page validatecode.aspx Defining variables so that they are useful for later modification private int codelen = 4;//captcha length private int fineness = 85;//picture sharpness private int imgwidth = 48;

A picture verification code of the HtmlHelper, the original calling code is as follows: After encapsulation into HtmlHelper:@Html. Validatecode ()Use the following steps:1. Build a Verification Code helper Using System; Using

haha for a long time did not bubble, the most in See point select Verification code a little meaning, so want to write a. First on If you are attracted to this effect, please keep looking. Before pasting the code to say a little bit of thought: 1.

But many people like to protected void Page_Load (object sender, EventArgs e) {} Inside to write code, even in some buttons to write to determine whether the session exists ~ ~This certainly can achieve the effect, the problem is, if there are 1000

Pass a variable number of parameters to the method. Public sealed class program {public static void Main () {DisplayTypes (new object (), new double [] {}, "aaa", 5 );} private static void DisplayTypes (params Object [] objects) {if (objects! =

Share the actual application of a C # custom event, In C #. NET development, events are frequently used. For example, you can add a click event for a button and write the code to run the Click Event trigger event. Whether it is ASP. NET or WinForm

C # public account development-webpage authorization (oauth2.0) to obtain basic user information 1,Preface Webpage authorization can be divided into two methods:Snsapi_base and snsapi_userinfo.Snsapi_base needs to follow the public account. The user

Linq learning notes (1 ).  First: Find the First record that meets the condition, and then return, no matter how much data is there. Single: sorts all records first, and then finds the unique record that meets the requirements. Single (): operates

Those years that plague us (C #), Entrusting this thing is not very easy to understand, but it is often used at work. You can see it everywhere. It makes people feel love and hate, I believe many people have been troubled by it. When it comes to