C#

DataTable has a method object Compute (string expression, string filter) to calculate the expression given on the current row used to pass filtering conditions. Expression: the expression to be calculated. Filter: the filter that limits the rows

Basic concepts of AttributePeople around the world often ask, what is Attribute? What is its use? It seems that this program can run without it. In fact, in. Net, Attribute is a very important component. This article provides relevant materials for

Today we will share with you the operators and condition structures in C. In the preface, We have briefly understood the C # language and probably understood the basic content of C, in future analysis, we will Package C # into our brain step by step

Before using the WMI object, you must add a reference to System. Management, and then you can call the WMI Object.The WMI object we use is: win32_shorttopmonitor.Object Reference: http://msdn.microsoft.com/zh-cn/library/Aa394122Code:Static void Main

After referring to the article "implement transparent background button (. net C #)" under WinCE5.0, I did it in a non-imitation manner. The results showed that the author had better ideas and practice. Although it was relatively simple, I had to

1. arrays are fixed in size and cannot be scaled. Although the generic method System. Array. Resize can reset the Array size,However, this method re-creates an array with the new size and initializes it with elements of the old array. Then the

Write a small item that uses the enumeration type and needs to be displayed in the DropDownList control. Try the following method. For example, an incorrect Enumeration type is defined. 1 public enum eErrorDetailCode: int 2 { 3 login successful = 0,

Code style check: StyleCop Code Defect check: FxCop Code Quality: Code metric/Code MetricsStyleCop Introduction The StyleCop tool provides warnings that indicate style and consistency rule violations in C # code. the warnings are organized into rule

IntroductionSequence, selection, and loop are the three structures of all programs. Today, let's talk about a small problem in the loop. ContentThere are four types of c # cycle structures: ForWhile... Do...Do... While...ForeachIn these four

The questions are as follows:Public class BaseA{Public static MyTest a1 = new MyTest ("a1 ");Public MyTest a2 = new MyTest ("a2 ");Static BaseA (){MyTest a3 = new MyTest ("a3 ");}Public BaseA (){MyTest a4 = new MyTest ("a4 ");}Public virtual void

  A few days ago, N Articles reported that C #/. NET was too slow and required to delete some features of C #/. NET. C #/. NET Slow seems to be recognized by the industry, no matter how you prove C #/. NET is actually not much slower than C ++, but

Thread Stack: Stack for shortManaged Heap When developing programs using the. Net Framework, we don't need to worry about the memory allocation problem, because the GC manager gives us everything. If we write the following two sections of code:Code

In the previous two articles, I tried to use Java as an example of a sudden whim? Replace the parameter. However, it is very troublesome to fill in the parameter again when the parameter is repeated. Due to the recent study and use of nhib.pdf, the [

When the form is switched from transparent to opaque, there is no problem of blinking. When the form is transparent, black flashes only once, but it is obvious.   Looking at countless materials, the results are the same. There are only one or two

  C # download the webpage source code to obtain the http status code HttpWebRequest hwr = (HttpWebRequest) WebRequest. Create ("http://www.baidu.com "); Hwr. AllowAutoRedirect = false; // redirection not allowed Hwr. Timeout = 10000; // connection

  In programs, DataRow is often used to save some data and complete the value transfer operation. In this case, some DataRow objects are formed, but they are organized using List or Datable. So how to initialize this DataRow? We know that DataRow is

System overhead related to creating a new String object may be very expensive. If you want to modify the string without creating a new object, you can use the System. Text. StringBuilder class. For example, when many strings are connected together

After the publication of the previous blog post, I am very pleased to receive the attention of many bloggers. It is very valuable for me to encourage and give some suggestions, in this article, we will talk about the convenience that lambda

In a multi-threaded or single-threaded task, it is always troublesome to include input parameters in the thread. A common method is to pass parameters using class and object variables, this method is easy to understand, but it is very troublesome to

C #2.0 the biggest improvement is generics. the biggest improvement of C #3.0 is Linq (Language integration query ). there are three major segments in the Table: Linq to XML and Linq to ADO. NET (Linq to SQL, Linq to DataSet, Linq to Entity), Linq