.Net Core

Example:The following code example demonstrates how to use the BackgroundWorker component to load an XML file from a URL. When you Click the "Download" button, the Click event handler calls the RunWorkerAsync method of the BackgroundWorker component

Let's take a look at this Bug!Add OutputCache settings to an. aspx file. The Code is as follows:Copy codeThe Code is as follows: The preceding settings indicate that the cache is cached for 5 minutes and updated based on different query strings.

Follow these steps:1. Make the following changes in the Global. asax file: Copy codeThe Code is as follows:Void Application_Start (object sender, EventArgs e){// Code that runs when the application starts// Define the timer// 1000 indicates the

Recently, the company's market expansion has been very fast, and dozens of systems have been launched for weeks. Although the system names are different, the contents are similar. Due to time constraints, many open systemsDespite the original error

Here is the code:Only user names can be entered: the user name must start with 0 ~ 9. ~ Z or ~ Z!Copy codeThe Code is as follows:Protected void Button3_Click (object sender, EventArgs e){Int error_count = 0; // used to identify the validity of a

The method is as follows:1. Drag ScriptManager into the page. To facilitate the use of Ajax scripts. It is also placed in other client controls to trigger the NetPost method. Client controls are not listed here. Copy codeThe Code is as follows: 2.

Today, on a data modification page, there is a DropDownList control bound to an important attribute in the object. I want the user to prompt the user when modifying the control value, he modified the value of the control. Therefore, the following

1. Vertical table shardingVertical table sharding refers to splitting a table with 20 columns into two tables, one table with 10 columns and one table with 11 columns. This reduces the capacity of a single table, it can improve the query performance,

In addition, if the SQL server Memory is sufficient, the index will be placed in the memory, and searching in the memory will naturally improve the efficiency. Therefore, we must make proper use of the index.1) What columns are indexed?By default,

Copy codeThe Code is as follows:/// /// Export the data in the datatable to the specified excel File/// /// web page Object /// datatable object containing exported data /// name of the excel file Public static void export (system. web. ui. page,

Most systems have permission systems. In general, it allows administrators to access a certain page or make some fields or controls visible or invisible. Whether data in the gridview can be deleted, added, or added. Most people use permissions as a

If the page is simply created using js, it requires a lot of code and is not intuitive.In asp.net, we can create user-defined controls and return the HTML code of user-defined controls through Ajax requests.Copy codeThe Code is as follows:Public

The watermark Function Code is as follows:Copy codeThe Code is as follows:/// /// Image modification class, mainly used to protect the copyright of the image. The copyright belongs to the original author./// Public class picmark{# Region "member

Copy codeThe Code is as follows:Public void listArticle (){CmsArticle arObj = new CmsArticle ();DataSet ds = arObj. listArticle ();If (ds! = Null){PagedDataSource PPS = new PagedDataSource ();Pds. DataSource = ds. Tables [0]. DefaultView;PPS.

The first time you enter the aspx page, you need to read a large amount of data. Write to the page. You must delete and modify all the operations on the page. Only when you click the Save button on the page can you write them to the database.

After submitting a page, if we click F5 again to refresh the page, a prompt will pop up prompting us that if we continue, we will resend the content we just submitted, if it is similar to payment or one-time operation, we should not do this

Only one line of code:Copy codeThe Code is as follows: "> In addition, js is directly used to process the alternate colors of all tr values on the entire page:Copy codeThe Code is as follows: select all and change the TR color **** * ******

Copy codeThe Code is as follows:/*************************************** ************ Copyright: Mr_Sheng* File name: JSONHelper. cs* File description:* Type description: JSONHelper JSON help class* Authorization statement:* This program is free

Set the following in web. config:Copy codeThe Code is as follows: ~ /D (\ d +) \. aspx ~ /Default. aspx? Id = $1 WhereThe handler class used to specify the configuration section "RewriterConfig" is named "URLRewriter. Config.

Copy codeThe Code is as follows:Using System;Using System. Data;Using System. Configuration;Using System. Collections;Using System. Web;Using System. Web. Security;Using System. Web. UI;Using System. Web. UI. WebControls;Using System. Web. UI.