.Net Core

I. MVC Validation usage:In the Asp.net MVC framework, if you need to add verification to the Model object, we can mark all Attribute attributes inherited from ValidationAttribute on the Model Attribute.For example, in the following code,

When you use HttpWebRequest to request https pages, "IOException: Because the remote party has disabled the transmission stream, authentication fails. ", There are some methods on the Internet, that is, using C # codeServicePointManager.

Step 1: The following is the core code, which can be referenced on the page or encapsulated. Step 2: apply this function to the text box (less than 50 words)   From Ai Zhi Chen

Asynchronous operations can execute a large number of resource-consuming I/O operations without stopping the main thread. Important performance considerations. The time-consuming stream operations of the windows Metro style app or desktop app will

I used VS2008 and VS2010 for development. . NET program. JAVA program is developed through MyEclipse8.5. The following describes the differences among IDE, language, and plug-in. However, due to limited experience and knowledge, this article can

Today, I mentioned the code comments in vs in a video from instructor Niu. There are a lot of comments on the Internet. I have also done this before, that is, how to follow the steps in a machine-like manner. I have never thought about more, so I

In the past, XML was the darling of programmers and the best choice for data transmission, API, and AJAX applications. In particular, when encountering AJAX applications, XMLHttpRequest checks the MIME type of the returned data, if it is of the text/

Problematic code segment: Response. ContentType = ftype; // ftypeis the file suffix, such as. jpg,. txt,. Zip Response. AddHeader ("Content-Disposition", "attachment; filename =" + fnametype); // fnametypeindicates the full name of the file, for

The System. Collections. ArrayList class is a special array. By adding and deleting elements, You can dynamically change the length of the array. Arraylist can automatically change the size, insert, delete, and access elements flexibly, Which is

There are good compression components on the Internet, but I personally feel it is quite troublesome to configure a lot of things and will compress the files in the entire folder. The Php website provides a parameter passing method, I have mentioned

ASP. NET: custom object class What is a custom object? Custom entities are the objects representing the business domain. Therefore, they are the foundation of the business layer. If you have a User authentication function (this example is used

In many cases, you need to add copyright or some additional text information to the images uploaded by the user. The following is a simple example of how to implement this function.Void UploadBtn_Click (Object sender, EventArgs e ){String

What is a stored procedure? Store common or complex tasks in advance with SQL statements and a specified name, when you call the database tutorial to provide services with the same functions as the predefined stored procedure, you only need to call

Here we use the temporary performance of SQL to implement the database paging function. The benefits of this function can achieve mass data processing. For more information, see, if there is a better method for this method, please provide comments.

If you need to use PHP to call Webservice, We must confirm that your php configuration file has opened the soap extension, that is, extension = php_soap.dll; otherwise, you cannot use PHP to call Webservice, for more information, see. OK. Now let's

1. Mode: Client/Server (C/S Mode)2. network connection process: 3. namespace usedSystem. NET, System. NET. Socket, System. System. ThreadingHttp://msdn.microsoft.com/library/chs/default.asp? Url

The call time is as follows:/// tree control name /// function name of the layer /// name of the table in the database /// Field name of the parent node /// node field name /// node data NewTreeInfoBll. InitTreeData (this. treeView1, "system

There are many ways to disable page caching. The most common method is to disable page caching directly on the client and write it directly in html. Another method is to disable page caching using net, next I will introduce you to you. Method 1: Use

To some extent, 301 redirection has nothing to do with 404 pages. Why should I get them together? because production is easy to implement, I will introduce them together. How to set the 404 page method record in asp.net. Next, let's take a look at

Today, website templates are prevalent. Many websites use the template technology. The most common example is PHP. Now many PHP uses templates, so we are considering the trend. Today we also bring ASP. NET template calling problems. I have also