Small detail record

Error reminder Control

If (this. textbox1.text. length> 12 | this. textbox1.text. length <6)

{

This. errorprovider1.seterror (this. textbox1, "username input error ");

Dialogresult returndlg = MessageBox. Show (this, "the user name is incorrect. Are you sure you want to enter it again? "," Information prompt ",

Messageboxbuttons. retrycancel, messageboxicon. Question );

Switch (returndlg)

{

Case dialogresult. Retry:

This. textbox1.text = "";

Break;

Case dialogresult. Cancel:

Break;

}

}

 

Use the information prompt control

This. tooltip1.settooltip (this. textbox1, "Enter the Student name. ");

Open a file

This. openfiledialog1.showdialog ();

String strfilename = This. openfiledialog1.filename;

If (strfilename. Trim () = "")

Return;

This. richtextbox1.loadfile (strfilename, richtextboxstreamtype. plaintext );

This. statusbarpanel1.text = "file name:" + strfilename;

Richtextbox‑mousemove

// Detect the mouse position

Int xpos = cursor. position. X;

Int ypos = cursor. position. Y;

This. statusbarpanel2.text = "mouse position: x =" + xpos. tostring () + "Y =" + ypos. tostring ();