Design a multi-Document Interface (MDI) application to open, arrange, and close subwindows ., One multiple mdi

Design a multi-Document Interface (MDI) application to open, arrange, and close subwindows ., One multiple mdi

 

First, we need to know what is the multi-Document Interface (MDI)

In theory, it is "developed and designed in a multi-document window environment. This multi-document interface is called the multi-Document Interface (mdi )"

The most common Excel sheet is mdi.

[My personal understanding is like this]

 

Start the actual operation:

1. Open two forms. Form2 is the main form and Form2_son is the subform]

2. Drag the control in the main form Form2

MenuStrip (menu bar)

 

 

Set IsMdiContainer = True for form2

3. Drag the control in the subform Form2_son.

RichTextBox (full window duck attribute)

4. Code in Form2

Private void open the subwindow ToolStripMenuItem_Click (object sender, EventArgs e) {Form2_son myChild = new Form2_son (); myChild. MdiParent = this; myChild. Show ();}

1 // Close the subform of the current activity 2 private void Close the subwindow ToolStripMenuItem_Click (object sender, EventArgs e) 3 {4 ActiveMdiChild. Close (); 5}

Private void close all subwindows ToolStripMenuItem_Click (object sender, EventArgs e) {if (MdiChildren. length> 0) {foreach (Form myForm in mdichil.pdf) {myForm. close ();}}}

// Exit the program
Private void Exit ToolStripMenuItem_Click (object sender, EventArgs e) {Application. Exit ();}

　　

// The form is arranged by LayoutMdi () where the parameter is the enumerated Value

MdiLayout. Cascade // Cascade

MdiLayout. TileHorizontal // horizontal Tile

MdiLayout. TileVertical // vertically tiled

Private void stacked ToolStripMenuItem_Click (object sender, EventArgs e) {this. layoutMdi (MdiLayout. cascade);} private void horizontally tiled ToolStripMenuItem_Click (object sender, EventArgs e) {this. layoutMdi (MdiLayout. tileHorizontal );}