First knowledge of windows program knowledge, first knowledge of windows

First knowledge of windows program knowledge, first knowledge of windows

When we first know a thing, we will be unfamiliar, and we will understand it slowly. Let me take you to understand it.

　　

1. Form is a basic Form class defined by. Net Framework. It has basic Form attributes and methods.

Attribute	Description
MaximizeBox	Confirm the upper-right corner of the Form title bar ------ whether a maximized box exists --------- the default value is True.
ShowInTaskbar	Determine whether the form appears in the ---------- taskbar ------ the default value is True
StartPosition	Determine the position of the first appearance of the form ----------
WindowState	Determine the output status of the form
FormBorderStyle	After startup, you can drag the form size --------------- and set the value to FixedSingle.
Method	Description
Close ()	Close form
Show ()	Display form
ShowDialong ()	Modular display form
Hide ()	Hide form

Ii. Basic controls

Label ------------------ -------------------- eg. User Name

TextBox ------ Blank box -------------------

Attribute	Description
MaxLength	Specify the maximum number of characters entered in the text box
Multiline	Whether multiple lines of text can be entered
PasswordChar	Password box
ReadOnly	Read-Only cannot be changed

ComboBox ------ ---------- eg. login type, administrator and user

Attribute	Description
Items	Items in the combo box
DropDownStyle	Allow users to edit text boxes
SelectedIndex	Index Number of the currently selected project, starting from 0
SelectedItem	Obtain the currently selected items
Event	Description
Click	An error occurred while clicking the control.
SelectedIndexChanged	Occurs after the SelectedIndex attribute is modified.
Method	Description
Add ()	Add Project
Clear ()	Remove all items
Remove ()	Remove a specified item

Button )--------------

Attribute	Description
Enable	Boolean value, indicating whether the control can be used

Message Box)

In Windows, the message box is a MessageBox object. To create a message box, you must use the MessageBox. show (); method.

There are four types of commonly used message boxes.

01. MessageBox. Show (string to be displayed );

02. MessageBox. Show (string to be displayed, message box title );

03. MessageBox. Show (string to be displayed, message box title, and message box button );

04. MessageBox. Show (string to be displayed, message box title, message box button, and message box icon );

eg:MessageBoxButton.AbortRetryIgnore

 

MessageBoxButton.OK

MessageBoxButton.OKCancel

MessageBoxButton.RetryCancel

MessageBoxButton.YesNo

MessageBoxButtons.YesNoCancel

The third parameter MessagBoxButton is used to set the button displayed in the message box. You can select the type of the button in the form.

MessageBoxIcon.Information

MessageBoxIcon.Error

MessageBoxIcon.Exclamation

MessageBoxIcon.Question

Menu Bar control (MenuStrip )------------

Toolbar Control (ToolStrip )----------------------

Attribute	Description
ImageScalingSize	The item in the toolbar shows the image size.
DisplayStyle	Set display image or text
ImageScaling	Adjust button or label to display the image size

Radio button (RadioButton )--------------

Group box (GroupBox )-------------

Panel ---------- add student users

Date control (DateTimePicker )-------------------

Attribute	Description
Value	Date and control value selected by the Control

Image list control (ImageList) ---- ------ ColorDepth (obtain the color depth of the image list)

Shortcut menu (ContextMenuStrip )------

Attribute	Description
Displaystyle	Whether to display text and images
GridLines	Display gridlines --- default value true
MultiSelect	Multiple options are not allowed. The default value is False.

PictureBox)

Timer control in the toolbox )-----

Attribute	Description
Interval	Event frequency, in milliseconds
Enabled	Whether to periodically trigger an event (ON or OFF)
Event	Description
Tick	Events that occur at a specified interval
Method	Description
Start ()	Start Timer
Stop ()	Stop Timer

4. Code Parsing

Event: when a user triggers certain actions of a button through the mouse or keyboard"

 

 private void button1_Click(object sender, EventArgs e)        {            this.Close();        }

 

Sender -------------- is the event Source

E ------------ is an event parameter (EventArgs) object

Use a code in the form to Close the form -------------- this. Close ();

This --------- is a keyword that represents the current form object.

The Close () ---------- method is a Form-like Form method, which is used to Close the Form.

5. Jump to the form

Private void buLogin_Click (object sender, EventArgs e) {// call the method From a = new From (); Show (); // Hide the method This. Hide ();}