.Net Core

Copy codeThe Code is as follows:Dictionary list = new Dictionary ;// Version 3.0 or laterForeach (var item in list){Console. WriteLine (item. Key + item. Value );}// KeyValuePair Foreach (KeyValuePair kv in list){Console. WriteLine (kv. Key + kv.

Copy codeThe Code is as follows:// DataDataTable dtObject = dt;// Keep the columnString [] saveColumns = new string [5];SaveColumns [0] = "X"; // reserved column 1SaveColumns [1] = "XX"; // reserve column 2SaveColumns [2] = "XXX ";SaveColumns [3] = "

ASP. NET provides Session objects, allowing programmers to identify, store, and process the context information of several requests from the same browser object to a specific network application on the server. Session corresponds to the same

In C #, determine whether two objects are equal: Equals, RefrenceEquals, and =, where = is the operator, and the other two are the methods, and Equals has two versions, one is static, the other is virtual, the virtual can be overwritten by the

Use a WEB developed by C # To select a local directory path control. After the OBJECT control is embedded into a webpage, it lists the directories on the local disk. Use the control JS method GetDirPath () to obtain the selected directory path. The

ASP. NET2.0 provides some new technical features for improving program performance. The cache technology is a very important feature and provides a very good local data cache mechanism, this effectively improves the performance of data access.Data

:First, create a directory on the site, such as Fonts, to store these special Fonts, lcdd. ttf and lcdd. eot. These two files are actually just a font, but they have different extensions. Is to solve the problem that IE and non-IE browsers cannot be

1. User Logon This document describes how to save the current user's logon information (session, cookie) after a user successfully logs on. This document describes identity authentication (in fact, it is based on cookies, next let's look at the code.

In any case, it does not return to the previous page.After checking the information, the processing method in asp.net has changed. When you click the button, the page is refreshed. Therefore, we need to change-1 to-2 to return to the previous

1. Brief Introduction to HttpClientI vaguely remember that at that time, I used WebClient and HttpWebRequest to send a request. Now ASP. NET MVC4 comes with a class HttpClient, which is used to receive HttpResponseMessage and send

TO_DATE format (take the time: 2007-11-02:45:25 as an example)Year:Yytwodigits two-year display value: 07Yyythreedigits: 007Yyyyfourdigits four-digit year display value: 2007Month:Mmnumber: 11Monabbreviated Character Set indicates the displayed

Global ReferenceUsing Newtonsoft. Json;Using Newtonsoft. Json. Converters;// Deserializes A Json string into an objectTarget object = JavaScriptConvert. DeserializeObject (JSON string, typeof (target object ));// Serialize the target object into a

1.1.1 Summary Recently, our system is facing a severe performance bottleneck. This is due to the increase in access traffic and the increase in client requests at the same time, which forces us to solve this problem from two aspects, increase

Here is an example: Create a folder that can contain any subdirectory. Create a console project and add a class ZipManager to implement the operations we want. Add a WindowsBase reference for the project. (This name is unfriendly, but the

1. List page. Generally, List pages are used to display data. The List page in this article provides data display and paging, deletion, addition, and modification operations. Because some people in the garden are still using ViewData when using MVC

Copy codeThe Code is as follows:Protected void Page_Load (object sender, EventArgs e){Response. Write (string. Format ("Number 1 ~ The sum of 10 is equal to {0 }. ", Sum (1, 10). ToString ()));}Private int Sum (int min, int max){Int s = 0;For (int I

Write a method:Copy codeThe Code is as follows:Private void DisplayAllControl (Control control, int step){Foreach (Control ctl in control. Controls){String s = new string ('-', step * 4) + ctl. GetType (). Name + " "〉";Response. Write (s + " ");If

ASPX page access requires. net support.Check whether the installation is complete. NET, open IIS, right click on the default website, if no ASP. The. NET tab is not installed or is not installed. NET registered to IIS.1. Not Installed. download. .

The following uses arrays as an example to describe some commonly used LINQ operations.Copy codeThe Code is as follows:Static void Main (string [] args){Int [] a = {1, 2, 3, 4, 5, 6, 7 };Int [] B = {4, 5, 6, 7, 8, 9, 10 };Int [] c = {1, 2, 3, 3, 4, 1

Maybe you have started to twenty your facial muscles! In hosting languages, reflection is the most notorious! Its performance is too low, and it is sometimes intolerable. But you don't have to worry about it. Let's talk about how to optimize