Functional specifications
The notepad in addition to the implementation of Windows notepad part of the function, but also can arbitrarily change the font type, size and color, and in the status bar display time.
In order to facilitate the user’s operation, a toolbar is also placed on the form of the program.
The source code to show
Interface design and other operations reference: C#+Winform notepad program
1. Set the flag bit
bool b = false; // Determine whether the file is new or opened from disk
// True indicates that the file is opened from disk. False indicates that the file is created. The default value is false
bool s = true; // Check whether the file is saved
// True indicates that the file is already saved. False indicates that the file is not saved. The default value is true
Copy the code2. The menu
2.1 file
Methods provided by SaveFileDialog & OpenFileDialog & RichTextBox
2.1.1 new
/ / new
/ / open | current file from the disk is not empty, then choose whether to save
/ / save
// If the file is opened from disk and its contents are modified, the file is saved in the open path
// If the file is new and not empty, SaveFileDialog selects a path to save it
// Set the state to save
/ / no save
// Empty the RichTextBox Text and set the state to New
private void tsmiNew_Click(object sender, EventArgs e)
{
if (b == true|| rtxtNotepad.Text.Trim() ! ="")
{
if (s == false)
{
string result;
result =
MessageBox
.Show("File not saved. Do you want to save it?"."Save file",
MessageBoxButtons.YesNoCancel)
.ToString();
switch (result)
{
case "Yes":
if (b == true)
{
rtxtNotepad.SaveFile(odlgNotepad.FileName);
}
else if (sdlgNotepad.ShowDialog() == DialogResult.OK
)
{
rtxtNotepad.SaveFile(sdlgNotepad.FileName);
}
s = true;
rtxtNotepad.Text = "";
break;
case "No":
b = false;
rtxtNotepad.Text = "";
break; }}}}Copy the code2.1.2 open
The previous section of code is the same as “New”.
/ / open
// Call the new method
// Use OpenFileDialog to select open files
// Set state for disk open & save
private void tsmiOpen_Click(object sender, EventArgs e)
{
tsmiNew_Click (sender, e);
odlgNotepad.RestoreDirectory = true;
if( (odlgNotepad.ShowDialog() == DialogResult.OK) && odlgNotepad.FileName ! =""
)
{
rtxtNotepad.LoadFile(odlgNotepad.FileName);
b = true;
}
s = true;
}
Copy the code2.1.3 save
/ / save
// If the file is opened from disk and its contents are modified, it is saved directly
// If the file is new and not empty, SaveFileDialog selects a path and saves it
// Set the state to save
private void tsmiSave_Click(object sender, EventArgs e)
{
if (b == true && rtxtNotepad.Modified == true)
{
rtxtNotepad.SaveFile(odlgNotepad.FileName);
s = true;
}
else if (
b == false&& rtxtNotepad.Text.Trim() ! ="" &&
sdlgNotepad.ShowDialog() == DialogResult.OK
)
{
rtxtNotepad.SaveFile(sdlgNotepad.FileName);
s = true;
b = true; odlgNotepad.FileName = sdlgNotepad.FileName; }}Copy the code2.1.4 save as
/ / save as
// Save after SaveFileDialog selects the path
// Set the state to save
private void tsmiSaveAs_Click(object sender, EventArgs e)
{
if (sdlgNotepad.ShowDialog() == DialogResult.OK)
{
rtxtNotepad.SaveFile(sdlgNotepad.FileName);
s = true; }}Copy the code2.1.5 exit
/ / exit
private void tsmiClose_Click(object sender, EventArgs e)
{
tsmiNew_Click(sender, e);
Application.Exit();
}
Copy the code2.2 the editor
All use the methods provided by RichTextBox
2.2.1 undo
/ / cancel
private void tsmiUndo_Click(object sender, EventArgs e)
{
rtxtNotepad.Undo();
}
Copy the code2.2.2 copy
/ / copy
private void tsmiCopy_Click(object sender, EventArgs e)
{
rtxtNotepad.Copy();
}
Copy the code2.2.3 shear
/ / shear
private void tsmiCut_Click(object sender, EventArgs e)
{
rtxtNotepad.Cut();
}
Copy the code2.2.4 paste
/ / paste
private void tsmiPaste_Click(object sender, EventArgs e)
{
rtxtNotepad.Paste();
}
Copy the code2.2.5 selection
/ / all
private void tsmiSelectAll_Click(object sender, EventArgs e)
{
rtxtNotepad.SelectAll();
}
Copy the code2.2.6 date
// Use system.datetime. Now to get the current date and time
private void tsmiDate_Click(object sender, EventArgs e)
{
rtxtNotepad.AppendText(System.DateTime.Now.ToString());
}
Copy the code2.3 format
2.3.1 Wrap
// wrap
// Change the WordWrap property of the RichTextBox according to the Checked property
private void tsmiAuto_Click(object sender, EventArgs e)
{
if (tsmiAuto.Checked == false)
{
tsmiAuto.Checked = true;
rtxtNotepad.WordWrap = true;
}
else
{
tsmiAuto.Checked = false;
rtxtNotepad.WordWrap = false; }}Copy the code2.3.2 font
FontDialog
/ / font - FontDialog
// According to the FontDialog Color and Font properties,
// Change the SelectionColor and SelectionFont properties of the RichTextBox
private void tsmiFont_Click(object sender, EventArgs e)
{
fdlgNotepad.ShowColor = true;
if(fdlgNotepad.ShowDialog() == DialogResult.OK) { rtxtNotepad.SelectionColor = fdlgNotepad.Color; rtxtNotepad.SelectionFont = fdlgNotepad.Font; }}Copy the code2.4 check the
Against 2.4.1 toolbar
// Toolbar display hidden
// Change the Visible property of the ToolStrip according to the Checked property
// Modify the Location and Height attributes of the RichTextBox
private void tsmiToolStrip_Click(object sender, EventArgs e)
{
Point point;
if (tsmiToolStrip.Checked == true)
{
// when hiding the toolbar, set the coordinate to (0,24) because the height of the menu is 24
point = new Point(0.24);
tsmiToolStrip.Checked = false;
tlsNotepad.Visible = false;
// Sets the upper-left corner position of the multi-format text box
rtxtNotepad.Location = point;
// After hiding the toolbar, increase the height of the text box
rtxtNotepad.Height += tlsNotepad.Height;
}
else
{
// when displaying the toolbar, the position of the upper left corner of the multi-format text box is (0,49),
// Since the height of the toolbar is 25 and the height of the menu is 24, it is 49
point = new Point(0.49);
tsmiToolStrip.Checked = true;
tlsNotepad.Visible = true; rtxtNotepad.Location = point; rtxtNotepad.Height -= tlsNotepad.Height; }}Copy the code2.4.2 the status bar
The StatusStrip is below the RichTextBox and does not affect the Location property of the RichTextBox (upper left position).
// Status bar display is hidden
// Change StatusStrip Visible property according to Checked property
// Change the Height of the RichTextBox
// StatusStrip below RichTextBox does not affect the Location property of RichTextBox (upper left position)
private void tsmiStatusStrip_Click(object sender, EventArgs e)
{
if (tsmiStatusStrip.Checked == true)
{
tsmiStatusStrip.Checked = false;
stsNotepad.Visible = false;
rtxtNotepad.Height += stsNotepad.Height;
}
else
{
tsmiStatusStrip.Checked = true;
stsNotepad.Visible = true; rtxtNotepad.Height -= stsNotepad.Height; }}Copy the code2.5 help
2.5.1 About Notepad
2.5.1.1 child form
Win10 with notepad help link.
// Close the help window
private void btnOK_Click(object sender, EventArgs e)
{
this.Close();
}
// Open help link (select win10 with notepad help link)
private void LinkLabel1_LinkClicked(object sender, LinkLabelLinkClickedEventArgs e)
{
System.Diagnostics.Process.Start("https://cn.bing.com/search?q=get+help+with+notepad+in+windows+10&filters=guid:%224466414-en-dia%22%20lang:%22en%22&form =T00032&ocid=HelpPane-BingIA");
}
Copy the code2.5.1.2 parent form
// Displays a help window
private void tsmiAbout_Click(object sender, EventArgs e)
{
frmAbout ob_FrmAbout = new frmAbout();
ob_FrmAbout.Show();
}
Copy the code2.6 the toolbar
The index bit starts at 0, and the delimiter also occupies the index bit.
// Click the item index number from the toolbar to call the corresponding method under "Edit" in the menu
private void tlsNotepad_ItemClicked(
object sender,
ToolStripItemClickedEventArgs e
)
{
int n;
n = tlsNotepad.Items.IndexOf(e.ClickedItem);
switch (n)
{
case 0:
tsmiSave_Click (sender, e);
break;
case 1:
tsmiOpen_Click (sender, e);
break;
case 2:
tsmiSave_Click (sender, e);
break;
case 4:
tsmiCopy_Click (sender, e);
break;
case 5:
tsmiCut_Click (sender, e);
break;
case 6:
tsmiPaste_Click (sender, e);
break;
case 8:
tsmiAbout_Click (sender, e);
break; }}Copy the code2.7 Event Triggering
2.7.1 TextChanged event for the RichTextBox control
// The TextChanged event of the RichTextBox control
// The text is modified and the state is set to unsaved
private void rtxNotepad_TextChanged(object sender, EventArgs e)
{
s = false;
}
Copy the code2.7.2 SizeChanged Event for the Form control
The AutoSize attribute of Label must be set to False; otherwise, Width cannot be changed.
// SizeChanged event for the Form control
// Adjust the label width in the status bar when the form size changes
// The AutoSize attribute of Label must be set to False
private void frmNotepad_SizeChanged(object sender, EventArgs e)
{
tssLbl1.Width = Width / 2;
tssLbl2.Width = Width / 3;
}
Copy the code2.7.3 Tick events of the Timer control
The Interval attribute is expressed in milliseconds.
// The Tick event of the Timer control
// Use system.datetime. Now to refresh the status bar time every second
// Set the Interval attribute (unit: ms) to 1000
private void tmrNotepad_Tick(object sender, EventArgs e)
{
tssLbl2.Text = System.DateTime.Now.ToString();
}
Copy the codeA functional test
file
The editor
format
To view
help
Window size changes
tips
- Through this assignment, I realized the importance of requirement analysis in software design, and had a deeper understanding of the “events” learned before, and also felt the effect of reasonable naming on increasing readability (Hungarian nomenclature).
.cs class files. Source code is written here, mainly look at the code here.
.resx resource file, which stores resources.
Csproj C# project file, using VS to open this file can directly open the project, automatically generated.
Csproj. user is a configuration file that is automatically generated and records information such as the project generation path and project startup program.
.designer.cs design file, automatically generated to initialize the controls on the form (in the function InitializeComponent()).
Aspx is a web page file where the HTML code is written.
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This procedure still has some limitations: Windows notepad in the search and replace functions; Use default toolbar instead of right-click menu, not convenient enough; Provided documents are not prompted to save before exiting the program (this is done by calling tsmiNew_Click(sender, e) before application.exit ()).
-
Difficulties encountered:
-
The form design part of the menu is tedious;
-
When adjusting the Width of the status bar Label, the AutoSize property of Label must be set to False; otherwise, Width cannot be changed.
-
Clarify the criteria for the save operation and the establishment of two flag bits (see code comments).
Repository
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