C#

How to use code to set operations in IE and FF to change the Script or JavaScript status in IE, whether it is disabled or enabled. The following articles do not support other browsers.   Currently, two solutions are available (IE is used as an

I accidentally read some new features of 4.0 today. I am very interested in the ExpandoObject class in the SystemDynamic namespace. I have read an English article to share with you. First, let's look at the members of this

The implementation code is as follows: ManagementBaseObject inPar = null;ManagementBaseObject outPar = null;ManagementClass mc = new ManagementClass ("Win32_NetworkAdapterConfiguration ");ManagementObjectCollection moc = mc. GetInstances ();Foreach (

The three methods are as follows:String a = "";1. if (a = "")2. if (a = String. Empty)3. if (a. Length = 0) The three methods are equivalent,Which method has the highest performance? I will illustrate the problem with an experiment. Create three

Bitmap bmp = new Bitmap (100,100 );Graphics g = Graphics. FromImage (bmp );Font f = new Font ("arial", 11f );Brush B = Brushes. Blue;String txt = "Rotate text animation! ";SizeF sz = g. MeasureString (txt, f );G. Clear (Color. WhiteSmoke );G.

In general, I only need to use the ArrayList. Contains () method to determine whether an element exists. However, if the ArrayList Contains a custom class, I need to implement it myself, as shown in the following example: For example, we have a

We often need to randomly generate a group of non-repeated questions when performing an exam system that can automatically generate the exam. net Framework provides a class System dedicated to generating random numbers. random.As we all know about

This article lists the program source code and notes for connecting C # To Access, SQL Server, Oracle, MySQL, DB2, and SyBase. 1. C # connect to Access Program code: Code highlighting produced by Actipro CodeHighlighter

It is very easy to make the MDI form in VB. This is not easy in C #, but it is very convenient. First, add a form in C #, name it MdiMain, and set IsMdiContainer to true, so that the MDI main form is created. Then add a new form named MdiChild. Run

If you need to enter a lot of content in your program, such as various types of documents, it will be a cool feature to automatically switch the Input Method to the appropriate State when entering each input box, compared with the dazzling interface,

The implementation code is as follows: Using System;Using System. Collections. Generic;Using System. ComponentModel;Using System. Data;Using System. Drawing;Using System. Text;Using System. Windows. Forms; Using CodeClassLibrary;Using System.

A Textbox1, two buttons button1 and button2 ~ are placed on windows Forms ~ Press button1 to select an excel file ~ Processing by button2 Code SnippetPrivate void button#click (object sendeer, EventArgs e){OpenFileDialog openFiledialog1 = new

  The SqlConnection class is used to connect the database (SQL Server). In order to develop good programming habits, the reader should use the three-tier architecture programming idea to complete project development. Place operations related to the

 Use the CommandText method of the SqlCommand class (to construct an insert statement for it) and ExecuteNonQuery to insert data into the table. The main program code is as follows. First, instantiate a SqlCommand object (cmd), and then use the SQL

1. Use Add References to reference System. Data. SQLite. DLL in the bin directory of the SQLite ADO. NET installation directory. 2. Create a database file: because it is always a 0-byte file, I/O can also be used (?!). System. Data. SQLite.

I recently learned about EDM and found that LinqPad is a good thing. It can run the Linq To SQL and Entity SQL Language scripts, but does not use the ESql query function. It always reports an error and cannot find the portal for half a day, in anger,

I just reviewed the sort () method of the Array class. Here I will list some common ones and share them with you.   The Array class implements the Bubble Sorting of elements in the Array. The Sort () method requires that the elements in the array

Asynchronously reads files, triggers an event after reading is complete, and notifies the main thread. The main thread and the reading thread are independent of each other. Using System;Using System. Collections. Generic;Using System. Text;Using

Premise: Introduce COM components 1. Create ObjectOMissing = System. Reflection. Missing. Value;Word. _ Application oWord;Word. _ Document oDoc;OWord =NewWord. Application ();OWord. Visible =True;ODoc = oWord. Documents. Add (RefOMissing,RefOMissing,

1. concept description Is the operator used in C # To determine type compatibility. Check whether an object is compatible with other specified types. If an object is of a certain type or its parent type, true is returned, otherwise, false is