C # Code dialog control implementation (open, save, change font, color, print function)

Open:

Private void openfiledialogbtn_click (Object sender, system. eventargs e ){
Openfiledialog = new openfiledialog ();
Openfiledialog. initialdirectory = "C :\\"; // note that c: \ instead of C: openfiledialog is used to write the path here. filter = "text file | *. * | C # file | *. CS | all files | *. *";
Openfiledialog. restoredirectory = true;
Openfiledialog. filterindex = 1;
If (openfiledialog. showdialog () = dialogresult. OK)
{Fname = openfiledialog. filename;
File fileopen = new file (fname );
Isfilehavename = true;
Richtextbox1.text = fileopen. readfile ();
Richtextbox1.appendtext ("");
}}

Save:

Private void saveasdialogbtn_click (Object sender, system. eventargs E)
{Savefiledialog = new savefiledialog ();
Savefiledialog. Filter = "text file | *. * | C # file | *. CS | all files | *.*";
Savefiledialog. filterindex = 2;
Savefiledialog. restoredirectory = true;
If (savefiledialog. showdialog () = dialogresult. OK)
{If (savefiledialog. showdialog () = dialogresult. OK)
{Fname = savefiledialog. filename;
File fsaveas = new file (fname );
Isfilehavename = true; file: // The saved file has a name.
Fsaveas. writefile (richtextbox1.text );
}}
}

Change font size

Private void fontdialogbtn_click (Object sender, system. eventargs E)
{Fontdialog = new fontdialog ();
Fontdialog. Color = richtextbox1.forecolor;
Fontdialog. allowscriptchange = true;
Fontdialog. showcolor = true;
If (fontdialog. showdialog ()! = Dialogresult. Cancel)
{Richtextbox1.selectionfont = fontdialog. Font; // change the font of the selected text.
}}

Change font color:

Private void colordialogbtn_click (Object sender, system. eventargs E)
{Colordialog = new colordialog ();
Colordialog. allowfullopen = true;
Colordialog. fullopen = true;
Colordialog. showHelp = true;
Colordialog. Color = color. Black; // initialize the font color in the current text box. When you click "cancel" in the colordialog dialog box
File: // restore the original value
Colordialog. showdialog ();
Richtextbox1.selectioncolor = colordialog. color;
}

Print:

private void printdocument_printpage (Object sender, system. drawing. printing. printpageeventargs e)
{float linesperpage = 0; // The row number of the page
float ypos = 0; // print the vertical position of the string
int COUNT = 0; // row counter
float leftmargin = E. marginbounds. left; // left margin
float topmargin = E. marginbounds. top; // top margin
string line = NULL; // line string
color CLR = richtextbox1.selectioncolor; // The current print color, in my Program Print in different colors
solidbrush B = new solidbrush (CLR); // brush
fnt = richtextbox1.selectionfont; // The current print font
linesperpage = E. marginbounds. height/fnt. getheight (E. graphics); // Number of printable lines per page
file: // print a page row by row
while (count {
ypos = topmargin + (count * fnt. getheight (E. graphics);
E. graphics. drawstring (line, fnt, B, leftmargin, ypos, new stringformat ();
count ++;
}file: // If the page is printed and the line is not empty, the next printing event is triggered.
File: // In the next print, linereader will automatically read the last unprinted content. Linereader can record the currently read location
If (line! = NULL)
E. hasmorepages = true;
else
E. hasmorepages = false;
}

Private void printpreviewbtn_click (Object sender, system. eventargs E)
{Linereader = new stringreader (richtextbox1.text );
Try
{Printpreviewdialog printpreviewdialog1 = new printpreviewdialog ();
Printpreviewdialog1.document = printdocument;
Printpreviewdialog1.formborderstyle = formborderstyle. fixed3d;
Printpreviewdialog1.showdialog (this );
} Catch (exception excep)
{MessageBox. Show (excep. message, "print error", messageboxbuttons. OK, messageboxicon. Error );
Return;
}}

Private void printdialogbtn_click (Object sender, system. eventargs E)
{Printdialog = new printdialog ();
Printdialog. Document = printdocument;
If (printdialog. showdialog ()! = Dialogresult. Cancel)
{Try
{Printdocument. Print ();
} Catch (exception ex)
{MessageBox. Show (ex. Message );
}}
}