C#

1. Add a namespace System. IO; System. Text; 2. File Reading (1). Use the FileStream class to read files, convert it to a char array, and then output. [] ByData = [[] charData = [= FileStream (,); Decoder d =, byData. Length, charData, (2).

To allow the program to respond to user operations as soon as possible, the thread is often used when developing Windows applications. If a thread is not used for time-consuming operations, the UI interface will be stuck for a long time. In this

1.1.1 Summary In most cases, our Web programs not only need to provide users with specific data, but in some cases, we also need to provide advanced users or managers with functions such as data aggregation and analysis charts. If we don't want to

The ItemSelectionChanged event is called by clicking the ListView item to delete the item. The Code is as follows: private void listView1_ItemSelectionChanged(object sender, ListViewItemSelectionChangedEventArgs e) {

DataSet, DataTable, and DataRow copying DataSet objects supports ADO. the core object of the NET disconnected and distributed data solution, which is widely used. we often need to use the data, such as getting data from a able, copying data from

There is always a small doubt -- How much memory does. NET occupy for an object or set? Is there a fast way to get it, instead of simply estimating the size of the analysis object? After checking MSDN and some other people's analysis, the solution

1. enumeration concept: enumeration is a user-defined Integer type. When declaring an enumeration, you must specify a group of acceptable values that can be included in the enumeration instance, you can also specify a name that is easy to remember.

LINQ It provides powerful query functions for C # and Visual Basic syntax. LINQ introduces a standard and easy-to-learn Data Query and update mode, which can be extended to support almost any type of data storage. Visual Studio contains the assembly

Back to directory In the previous article, we mentioned concurrency conflicts and detailed descriptions. Here, we will talk about it now!Causes of concurrency conflicts In fact, the concurrency conflicts in linq to SQL refer to the data {1, zzl,

Some time ago I wrote a blog post titled C # differences between obtaining local IP addresses in xp, win7, and win8, later, we found that the above method is incorrect for the win8 system when the network is disconnected, and the system will prompt

'Get the ratio of pixels on the CAD Screen ") 'Screen width and height of the current viewport Dim H As Variant H = ThisDrawing. getVariable ("") 'viewscreen = Abs (H/ScreenSize (1) End FunctionPublic Declare Function GetCursorPos Lib "(lpPoint As

In the previous article, we talked about "Heap" and "stack". In this article, we mainly talk about the differences between value types and reference types when they are passed as parameters. There are two main scenarios: 1. Pass the Value type

The object can be serialized into strings and files based on the WinCE JSON class library.   It prompts that there is a BUG in deserialization: If a field value of an object is null, an exception is thrown when it is serialized into a string and

Problem: After the WebService is deployed as a site, if you can test the webservice locally, "test form can only be used for requests from local computers" or "The test form is only available for requests from the local machine. ",Cause: This is

Reduces the loss caused by NullReferenceException I wrote a blog by ILoveSleep a few days ago. "I criticized many bloggers, but I don't think I should say something ugly to a blog. After all, ILoveSleep just shared his thoughts, if you have any

DotNet. Net. MySocket isSLB. NET(Server Load Balance Server Load balancer) is a core component of the project. Therefore, we have been wondering whether multiple processes can provide one service, like the IIS Web garden, to work together with

Using System. IO; using System. runtime. serialization. formatters. binary; using System. xml. serialization; namespace NOAS. publicOpinionMonitor. common {public class SerializeUtility {public enum SerializeType {XML, binary} # region serialization

It mainly inherits the original TextBox; append number content (ValueText) and display content (DisplayText); after editing, query the database to bring up DisplayText (for example, name); and display it in the original TextBox; when the TextBox is

I used to insert big data one by one. Because the computer configuration was not good, it took me half an hour to insert 0.17 million data records. That hurts! After listening to Teacher Yang zhongke's lesson, I found a good thing. The computer with

I. Introduction The factory method model was introduced in the previous topic. The factory method model was designed to overcome the disadvantages of the simple factory model, the factory class in the simple factory mode needs to add additional code