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Land box control

zhaozj2021-02-16  78

For a long time, I have recently taken out, I have not been made in the application, it is a bit of a bit! I hope that this thing can help you. Everyone discusses common progress, this article is relatively simple! Yes As a universal login box control!

First build a resolution project logincontrol, add a class library project LoginTrol, then add user control CTLOGIN

Then write code in ctllogin.cs file

//ctllogin.cs

Using system; using system.componentmodel; using system.data; using system.windows.form; using system.text;

Namespace logincontrol {///

/// CTLLogin's summary description. ///

Public class ctllogin: System.windows.Forms.userControl

{

Private system.windows.Forms.Panel Panel1;

Private system.windows.forms.label Lheader;

Private system.windows.forms.label ltext;

Private system.windows.Forms.Button Btnlogin

Private system.windows.forms.label lpassword;

Private system.windows.forms.label lusername;

Private system.windows.Forms.TextBox txtpassword;

Private system.windows.Forms.TextBox txtusername;

Private system.windows.Forms.PictureBox PictureBox1;

Private system.windows.Forms.ErrorProvider ErrorProvider;

///

/// The required designer variable. ///

Private system.componentmodel.Container Components = NULL;

Public Event System.EventHandler Successful; Public Event System.EventHandler Failed;

Private arraylist (); private arraylist strpassword = new arraylist (); private int index = -1;

Private string errmsg = "Please enter the correct username and password!";

Public CTLLogin () {// This call is required for the Windows.Forms Form Designer. InitializationComponent ();

// Todo: Add any initialization strusename.clear () after the initializationComponent call; strpassword.clear ();

///

/// Clean all the resources being used. ///

Protected Override Void Dispose (Bool Disposing)

{

IF (Disposing)

{

IF (Components! = NULL)

{

Components.dispose ();

}

}

Base.dispose (Disposing);

}

#REGION component designer generated code ///

/// Designer supports the required method - Do not use the code editor // / modify the contents of this method. ///

Private vidinitiRizeComponent () {

System.Resources.ResourceManager Resources = New System.Resources.ResourceManager (Typeof));

This.Panel1 = new system.windows.Forms.Panel ();

This.PictureBox1 = new system.windows.Forms.PictureBox ();

THIS.LTEXT = New System.windows.Forms.Label ();

This.lheader = new system.windows.forms.label ();

This.btnlogin = new system.windows.Forms.Button ();

This.lpassword = new system.windows.forms.label ();

This.lusername = new system.windows.forms.label ();

This.txtPassword = new system.windows.Forms.TextBox ();

THIS.TXTUSERNAME = new system.windows.Forms.TextBox ();

THIS.ErrorProvider = new system.windows.Forms.ErrorProvider ();

This.Panel1.suspendlayout ();

THIS.SUSPENDLAYOUT ();

//

// panel1

//

THIS.PANEL1.BACKCOLOR = system.drawing.systemcolors.activecaption;

This.Panel1.controls.add (this.picturebox1);

This.Panel1.controls.add (this.lText);

this.Panel1.controls.add (this.lheader);

This.Panel1.Location = new system.drawing.point (4, 4);

this.Panel1.name = "panel1";

This.Panel1.size = new system.drawing.size (480, 52);

this.Panel1.tabindex = 0;

//

// PictureBox1

//

This.PictureBox1.image = ((System.drawing.Image) ("PictureBox1.image)))));

This.PictureBox1.Location = new system.drawing.point (432, 12);

This.PictureBox1.name = "PictureBox1";

This.Picturebox1.size = new system.drawing.size (40, 32);

this.PictureBox1.tabindex = 6;

This.PictureBox1.tabstop = false;

//

// LText

//

THIS.LTEXT.LOCATION = New System.drawing.Point (36, 24);

This.lText.name = "ltd";

This.lText.size = new system.drawing.size (360, 20);

THIS.LText.tabindex = 5; this.lText.text = "Please enter your username and password."

THIS.LText.TextAlign = system.drawing.contentalignment.middleleft;

//

// LHEADER

//

This.lheader.font = new system.drawing.font ("taroma", 8.25f, system.drawing.fontstyle.bold, system.drawing.graphicsunit.point, ((System.byte) (0)));

This.lheader.location = new system.drawing.point (12, 4);

this.lheader.name = "lheader";

this.lheader.size = new system.drawing.size (384, 20);

this.lheader.tabindex = 4;

THIS.LHETER.TEXT = "Login";

THISLHEADER.TEXTALIGN = System.drawing.ContentAlignment.middleleft;

//

// btnlogin

//

This.btnlogin.flatstyle = system.windows.Forms.Flatstyle.Popup;

This.btnlogin.font = new system.drawing.font ("tahoma", 8.25f, system.drawing.fontstyle.bold, system.drawing.graphicsunit.point, ((System.byte) (0)));

This.btnlogin.location = new system.drawing.point (376, 292);

this.btnlogin.name = "btnlogin";

This.btnlogin.size = new system.drawing.size (70, 20);

this.btnlogin.tabindex = 14;

This.btnlogin.text = "landing";

This.btnlogin.click = new system.eventhandler (this.btnlogin_click);

//

// lpassword

//

This.lpassword.font = new system.drawing.font ("tahoma", 8.25f, system.drawing.fontstyle.bold, system.drawing.graphicsunit.point, ((System.byte) (0)));

THIS.LPassword.location = new system.drawing.point (76, 252);

this.lpassword.name = "lpassword";

this.lpassword.size = new system.drawing.size (80, 20);

THIS.LPassword.tabindex = 16;

this.lpassword.text = "Password";

This.lpassword.textAlign = system.drawing.contentAlignment.middleright;

//

// lusername

//

This.lusername.font = new system.drawing.font ("Taoma", 8.25F, System.drawing.FontStyle.Bold, System.drawing.graphicsUnit.point, ((System.byte) (0)));

THIS.LUSERNAME.LOCATION = New System.drawing.Point (76, 212);

this.lusername.name = "lusername";

THIS.LUSERNAME.SIZE = New System.drawing.size (80, 20);

THIS.LUSERNAME.TABINDEX = 15;

this.lusername.text = "User Name";

THIS.LUSERNAME.TEXTALIGN = System.drawing.contentAlignment.middleright;

//

// txtpassword

//

THIS.TXTPASSWORD.BORDERSTYLE = System.Windows.Forms.Borderstyle.fixedsingle;

THIS.TXTPASSWORD.LOCATION = New System.drawing.Point (176, 252);

this.txtpassword.name = "txtpassword";

THIS.TXTPASSWORD.PASSWORDCHAR = '*';

This.txtPassword.size = new system.drawing.size (270, 21);

This.txtPassword.tabindex = 13;

THIS.TXTPASSWORD.TEXT = "";

THIS.TXTPASSWORD.KEYPRESS = new system.windows.forms.keypressEventhandler (this.txtpassword_keypress);

This.txtPassword.Leave = new system.Eventhandler (this.control_leave);

This.txtPassword.Enter = new system.eventhandler (this.control_enter);

//

// txtusername

//

THIS.TXTUSERNAME.BORDERSTYLE = System.Windows.Forms.Borderstyle.Fixedsingle;

THIS.TXTUSERNAME.LOCATION = New System.drawing.Point (176, 212);

THIS.TXTUSERNAME.NAME = "TXTUSERNAME";

THIS.TXTUSERNAME.SIZE = New System.drawing.size (270, 21);

THIS.TXTUSERNAME.TABINDEX = 12;

THIS.TXTUSERNAME.TEXT = "";

THIS.TXTUSERNAME.KEYPRESS = New System.Windows.Forms.KeypressEventHandler (this.txtusername_KeyPress);

THIS.TXTUSERNAME.LEAVE = New System.EventHandler (this.control_leave);

THIS.TXTUSERNAME.ETER = New System.EventHandler (this.control_enter); //

// ErrorProvider

//

THIS.ERRORPROVIDER.CONTAINERCONTROL = THIS;

//

// ctllogin

//

This.Controls.Add (this.btnlogin);

This.Controls.add (this.lpassword);

This.Controls.add (this.lusername);

This.Controls.add (this.txtpassword);

This.Controls.add (this.txtusername);

This.Controls.add (this.Panel1);

THIS.NAME = "ctllogin";

This.Size = new system.drawing.size (484, 348);

This.Load = new system.eventhandler (this.ctllogin_load);

this.Panel1.ResumeLayout (false);

This.ResumeLayout (false);

} #Endregion

Private void ctllogin_load (Object sender, system.eventargs e) {// strusename.add (txtusername.text.trim ()); // strpassword.add (txtpassword.text.trim ());}

Private void txtpassword_keypress (object sender, system.windows.windows e) {if (e.keychar == (char) 13) {btnlogin_click (sender, new evenetargs ());}}

private void btnLogin_Click (object sender, System.EventArgs e) {bool b = CheckPassword (Username, Password); if (b) {Successful (this, new System.EventArgs ());} else {Failed (this, new System. Eventargs ());}}

///

/// Determine if the username and password are correct ///

///

All users

///

All user passwords

///

Private Bool Checkpassword (ArrayList Aluser, ArrayList Alpwd)

{

String struser = "";

String strpwd = "";

IF (aluser.count> 0 && alppwd.count> 0)

{

For (int i = 0; i

{

Struse = aluser [i] .tostring ();

Strpwd = alpwd [i] .tostring (). Trim ();

IF (struse.trim () == txtusername.text.trim () && strpwd.trim () == txtpassword.text.trim ())

{

Index_username = i;

ErrorProvider.dispose ();

Return True;

}

IF (i == aluser.count-1) {

ErrorProvider.seterror (btnlogin, errmsg);

Return False;

}

}

}

Return False;

}

Private Void Control_Enter (Object Sender, System.EventArgs E) {Control CTL = (Control) Sender; CTL.BackColor = Color.lemonChiffon;

Private Void Control_leave (Object Sender, System.Eventargs E) {Control CTL = (Control) Sender; CTL.BackColor = Color.White;}

Private void txtusername_keypress (object sender, system.windows.Forms.keypressEventArgs e) {if (E.KEYCHAR == (char) 13) {txtpassword.focus ();}}

///

/// All users ///

Public ArrayList Username

{

get

{

Return strusername;

}

set

{

Strusername = value;

}

}

///

/// All user passwords ///

Public ArrayList Password

{

get

{

Return strpassword;

}

set

{

Strpassword = value;

}

}

///

/// In the user array username, the index /////

Public int index_username

{

get

{

Return Index;

}

set

{

Index = value;

}

}

///

/// Error message ///

Public String ErrorMessage

{

get

{

Return errmsg;

}

set

{

Errmsg = Value;

}

}

}

}

Next, you can compile into LoginControl.dll

Add a test item TEST to the project, then add / remove the logincontrol.dll you just compiled into the toolbox, add a test interface to FRMTEST, then drag the CTLLogin control to the FRMTEST page in the toolbox.

Then test the just's control in frmtest.cs

//frmtest.cs

Using system; using system.collections; using system.componentmodel; using system.windows.form; using system.data; using informationclass; // write a test class

Namespace Test {////

/// Form1 summary description. ///

Public class frmtest: System.Windows.Forms.form

{

Private logincontrol.ctllogin ctllogin;

///

/// The required designer variable. ///

Private system.componentmodel.Container Components = NULL;

Private users objUsers = new users (); // Instantiate custom login user collection class private user m_objuser = new user (); // instantiate custom login user class

Public frmTest () {// // Windows Form Designer Support for // InitializationComponent (); // // Todo: Add any constructor code after INITIALIZECOMPONENT calls //}

///

/// Clean all the resources being used. ///

Protected Override Void Dispose (Bool Disposing)

{

IF (Disposing)

{

IF (Components! = NULL)

{

Components.dispose ();

}

}

Base.dispose (Disposing);

}

#Region Windows Form Designer Generated Code ///

/// Designer supports the required method - Do not use the code editor to modify the // / this method. ///

Private vidinitiRizeComponent ()

{

System.Resources.ResourceManager Resources = New System.Resources.ResourceManager (TypeOf (fmtest));

THIS.CTLLOGIN = New LoginControl.ctllogin ();

THIS.SUSPENDLAYOUT ();

//

// ctllogin

//

THIS.CTLOGIN.ErrorMessage = "Please enter the correct username and password!";

this.ctllogin.index_username = -1;

this.ctllogin.location = new system.drawing.point (0, 0);

THIS.CTLOGIN.NAME = "ctllogin";

This.ctllogin.size = new system.drawing.size (484, 348);

this.ctllogin.tabindex = 0;

THIS.CTLLOGIN.FAILED = New System.EventHandler (this.ctllogin_failed);

This.ctllogin.Load = new system.eventhandler (this.form1_load);

THIS.CTLLOGIN.SUCCESSFUL = New System.EventHandler (this.ctllogin_suCcessful);

//

// frmtest

//

THIS.AUTOSCALEBASESIZE = New System.drawing.size (6, 14);

THIS.CLIENTSIZE = New System.drawing.size (484, 345);

This.Controls.Add (this.ctllogin);

This.FormBorderstyle = system.windows.Forms.FormBorderstyle.FixedSingle;

This.icon = ((System.drawing.icon) ("$ this.icon")))

THIS.MAXIMIZEBOX = FALSE;

THIS.MINIMIZEBOX = FALSE;

this.name = "frmtest";

This.Text = "System login";

This.Load = New System.EventHandler (this.form1_load);

this.ResumeLayout (false);} #ENDREGION

///

/// The main entry point for the application. ///

[Stathread]

Static void main ()

{

Application.run (new frmtest ());

}

Private void ctllogin_failed (Object sender, system.eventargs e) {messagebox.show ("login failed! Please enter the correct username and password !!", "Information Tips", MessageBoxButtons.ok, MessageBoxicon.ERROR);}

private void ctlLogin_Successful (object sender, System.EventArgs e) {m_objUser = objUsers [ctlLogin.Index_Username]; MessageBox.Show ( "successful landing!", "prompt message", MessageBoxButtons.OK, MessageBoxIcon.Information);}

private void Form1_Load (object sender, System.EventArgs e) {objUsers = new ReadData () GetUsers ();. if (objUsers.Count> 0) {foreach (User objUser in objUsers) {ctlLogin.Username.Add (objUser.Name ); Ctllogin.password.add (objUser.password);}}}}}

Run the program

If the login failure will appear

If the landing is successful

In this way, a small landing control is made, I hope that this article can help if there is nothing to learn, if there is any lack of places, I hope you can correct it, thank you.

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