C#做的一個登陸控件,圖是用自已做的截圖軟件截的

男娘i 2022-08-25 13:46 142阅读 0赞

一個登陸控件,圖是用自已做的截圖軟件截的

![o_08013001.bmp][]

源代碼:

using  System;  
 using  System.Collections;  
 using  System.ComponentModel;  
 using  System.Drawing;  
 using  System.Data;  
 using  System.Windows.Forms;  
 using  System.Text;  
 using  System.Data.SqlClient;  
 using  System.Net;  
  
 namespace  CustTool  
\{  
 public  delegate  void  Successful();  
 public  delegate  void  Failed();  
  
 ///   
 ///  ctlLogin 的摘要說明。  
 ///    
  public  class  CustLogin : 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 lUserno;  
 private  System.Windows.Forms.TextBox txtPassword;  
 private  System.Windows.Forms.TextBox txtUserno;  
 private  System.Windows.Forms.PictureBox pictureBox1;  
 private  System.Windows.Forms.ErrorProvider errorProvider;  
 private  ToolTip toolTip  =  new  ToolTip();  
  
 ///   
 ///  必需的設計器變量。  
 ///    
  private  System.ComponentModel.Container components  =  null ;  
  
\[Category( " CustomerMethod " ),  
Description( " 驗證用戶名及密碼成功後的動作. " )\]  
 // public event System.EventHandler Successful;    
  public  event  Successful OnSuccessful;  
  
\[Category( " CustomerMethod " ),  
Description( " 驗證用戶名及密碼失敗後的動作. " )\]  
 // public event System.EventHandler Failed;    
  public  event  Failed OnFailed;  
  
  
 private  string  connectionString = " server=192.168.6.4;user id=puser;password=dye;database=productorder " ;  
 private  ArrayList userNo = new  ArrayList();  
 private  ArrayList passWord = new  ArrayList();  
 private  ArrayList userMemo = new  ArrayList();  
 private  int  userIndex =- 1 ;  
 private  string  errorMessage  =  " 請輸入正確的用戶賬號和密碼! " ;  
  
 private  string  userNoField = "" ;  
 private  string  passWordField = "" ;  
 private  string  userMemoField = "" ;  
 private  string  userTableName = "" ;  
  
  
 public  CustLogin()  
\{  
 //  該調用是 Windows.Forms 窗體設計器所必需的。    
  InitializeComponent();  
  
 //  TODO: 在 InitializeComponent 調用後添加任何初始化    
  userNo.Clear();  
passWord.Clear();  
\}  
  
 ///   
 ///  清理所有正在使用的資源。  
 ///    
  protected  override  void  Dispose(  bool  disposing )  
\{  
 if ( disposing )  
\{  
 if (components  !=  null )  
\{  
components.Dispose();  
\}  
\}  
 base .Dispose( disposing );  
\}  
  
 \#region  組件設計器生成的代碼    
 ///   
 ///  設計器支持所需的方法 - 不要使用代碼編輯器  
 ///  修改此方法的內容。  
 ///    
  private  void  InitializeComponent()  
\{  
System.Resources.ResourceManager resources  =  new  System.Resources.ResourceManager( typeof (CustLogin));  
 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 .lUserno  =  new  System.Windows.Forms.Label();  
 this .txtPassword  =  new  System.Windows.Forms.TextBox();  
 this .txtUserno  =  new  System.Windows.Forms.TextBox();  
 this .errorProvider  =  new  System.Windows.Forms.ErrorProvider();  
 this .panel1.SuspendLayout();  
 this .SuspendLayout();  
 //   
 //  panel1  
 //    
  this .panel1.Anchor  =  ((System.Windows.Forms.AnchorStyles)(((System.Windows.Forms.AnchorStyles.Top  |  System.Windows.Forms.AnchorStyles.Left)  
 |  System.Windows.Forms.AnchorStyles.Right)));  
 this .panel1.BackColor  =  System.Drawing.SystemColors.Window;  
 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( 0 ,  0 );  
 this .panel1.Name  =  " panel1 " ;  
 this .panel1.Size  =  new  System.Drawing.Size( 400 ,  52 );  
 this .panel1.TabIndex  =  0 ;  
 //   
 //  pictureBox1  
 //    
  this .pictureBox1.Image  =  ((System.Drawing.Image)(resources.GetObject( " pictureBox1.Image " )));  
 this .pictureBox1.Location  =  new  System.Drawing.Point( 336 ,  8 );  
 this .pictureBox1.Name  =  " pictureBox1 " ;  
 this .pictureBox1.Size  =  new  System.Drawing.Size( 32 ,  32 );  
 this .pictureBox1.SizeMode  =  System.Windows.Forms.PictureBoxSizeMode.StretchImage;  
 this .pictureBox1.TabIndex  =  6 ;  
 this .pictureBox1.TabStop  =  false ;  
 //   
 //  lText  
 //    
  this .lText.Location  =  new  System.Drawing.Point( 36 ,  24 );  
 this .lText.Name  =  " lText " ;  
 this .lText.Size  =  new  System.Drawing.Size( 284 ,  20 );  
 this .lText.TabIndex  =  5 ;  
 this .lText.Text  =  " 請輸入您的用戶賬號和密碼. " ;  
 this .lText.TextAlign  =  System.Drawing.ContentAlignment.MiddleLeft;  
 //   
 //  lHeader  
 //    
  this .lHeader.Font  =  new  System.Drawing.Font( " Tahoma " ,  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( 308 ,  20 );  
 this .lHeader.TabIndex  =  4 ;  
 this .lHeader.Text  =  " 登陸 " ;  
 this .lHeader.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( 304 ,  256 );  
 this .btnLogin.Name  =  " btnLogin " ;  
 this .btnLogin.Size  =  new  System.Drawing.Size( 70 ,  20 );  
 this .btnLogin.TabIndex  =  14 ;  
 this .btnLogin.Text  =  " 登 陸 " ;  
 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( 72 ,  224 );  
 this .lPassword.Name  =  " lPassword " ;  
 this .lPassword.Size  =  new  System.Drawing.Size( 88 ,  20 );  
 this .lPassword.TabIndex  =  16 ;  
 this .lPassword.Text  =  " 密 碼 " ;  
 this .lPassword.TextAlign  =  System.Drawing.ContentAlignment.MiddleRight;  
 //   
 //  lUserno  
 //    
  this .lUserno.Font  =  new  System.Drawing.Font( " Tahoma " ,  8.25F , System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((System.Byte)( 0 )));  
 this .lUserno.Location  =  new  System.Drawing.Point( 72 ,  184 );  
 this .lUserno.Name  =  " lUserno " ;  
 this .lUserno.Size  =  new  System.Drawing.Size( 88 ,  20 );  
 this .lUserno.TabIndex  =  15 ;  
 this .lUserno.Text  =  " 賬 號 " ;  
 this .lUserno.TextAlign  =  System.Drawing.ContentAlignment.MiddleRight;  
 //   
 //  txtPassword  
 //    
  this .txtPassword.BorderStyle  =  System.Windows.Forms.BorderStyle.FixedSingle;  
 this .txtPassword.Location  =  new  System.Drawing.Point( 168 ,  224 );  
 this .txtPassword.Name  =  " txtPassword " ;  
 this .txtPassword.PasswordChar  =  ' \* ' ;  
 this .txtPassword.Size  =  new  System.Drawing.Size( 208 ,  22 );  
 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);  
 //   
 //  txtUserno  
 //    
  this .txtUserno.BorderStyle  =  System.Windows.Forms.BorderStyle.FixedSingle;  
 this .txtUserno.Location  =  new  System.Drawing.Point( 168 ,  184 );  
 this .txtUserno.Name  =  " txtUserno " ;  
 this .txtUserno.Size  =  new  System.Drawing.Size( 208 ,  22 );  
 this .txtUserno.TabIndex  =  12 ;  
 this .txtUserno.Text  =  "" ;  
 this .txtUserno.KeyPress  \+=  new  System.Windows.Forms.KeyPressEventHandler( this .txtUserno\_KeyPress);  
 this .txtUserno.Leave  \+=  new  System.EventHandler( this .Control\_Leave);  
 this .txtUserno.Enter  \+=  new  System.EventHandler( this .Control\_Enter);  
 //   
 //  errorProvider  
 //    
  this .errorProvider.ContainerControl  =  this ;  
 //   
 //  CustLogin  
 //    
  this .BackColor  =  System.Drawing.SystemColors.Control;  
 this .Controls.Add( this .btnLogin);  
 this .Controls.Add( this .lPassword);  
 this .Controls.Add( this .lUserno);  
 this .Controls.Add( this .txtPassword);  
 this .Controls.Add( this .txtUserno);  
 this .Controls.Add( this .panel1);  
 this .Name  =  " CustLogin " ;  
 this .Size  =  new  System.Drawing.Size( 400 ,  280 );  
 this .panel1.ResumeLayout( false );  
 this .ResumeLayout( false );  
  
\}  
 \#endregion    
  
 \#region  PublicProperty   
 ///   
 ///  聯接字串  
 ///    
  \[Category( " DataProperty " ),  
Description( " 數據庫連接字串. " )\]  
 public  string  ConnectionString  
\{  
 get   
\{  
 return  connectionString;  
\}  
 set   
\{  
connectionString  =  value;  
\}  
\}  
  
 ///   
 ///  所有用戶  
 ///    
  \[Category( " CustomerProperty " ),  
Description( " 所有用戶賬號. " ),  
Browsable( false )\]  
 public  ArrayList UserNo  
\{  
 get   
\{  
 return  userNo;  
\}  
 set   
\{  
userNo  =  value;  
\}  
  
\}  
 ///   
 ///  所有用戶密碼  
 ///    
  \[Category( " CustomerProperty " ),  
Description( " 所有用戶密碼. " ),  
Browsable( false )\]  
 public  ArrayList PassWord  
\{  
 get   
\{  
 return  passWord;  
\}  
 set   
\{  
passWord  =  value;  
\}  
\}  
 ///  <summary>   
 ///  所有個人用戶的姓名或部門用戶的部門名稱  
 ///  </summary>   
  \[Category( " CustomerProperty " ),  
Description( " 所有用戶姓名或公共賬號的部門名稱. " ),  
Browsable( false )\]  
 public  ArrayList UserMemo  
\{  
 get   
\{  
 return  userMemo;  
\}  
 set   
\{  
userMemo = value;  
\}  
\}  
  
 ///   
 ///  在用戶數組Userno中的索引  
 ///    
  \[Category( " CustomerProperty " ),  
Description( " 用戶索引. " )\]  
 // \[Browsable(false)\]   
  public  int  UserIndex  
\{  
 get   
\{  
 return  userIndex;  
\}  
 // set  
 // \{  
 //  userIndex=value;  
 // \}    
  \}  
  
 ///   
 ///  錯誤信息  
 ///    
  \[Category( " CustomerProperty " ),  
Description( " 登陸失幾時的提示信息. " )\]  
 public  string  ErrorMessage  
\{  
 get   
\{  
 return  errorMessage;  
\}  
 set   
\{  
errorMessage  =  value;  
\}  
\}  
 ///   
 ///  表頭背景顏色  
 ///    
  \[Category( " CustomerProperty " ),  
Description( " 表頭背景顏色. " )\]  
 public  Color HeadBackColor  
\{  
 get   
\{  
 return  panel1.BackColor;  
\}  
 set   
\{  
panel1.BackColor = value;  
\}  
\}  
 ///   
 ///  表頭前景顏色  
 ///    
  \[Category( " CustomerProperty " ),  
Description( " 表頭前景顏色. " )\]  
 public  Color HeadForeColor  
\{  
 get   
\{  
 return  panel1.ForeColor;  
\}  
 set   
\{  
panel1.ForeColor = value;  
\}  
\}  
 ///   
 ///  LOGO圖標,推薦32\*32位圖  
 ///    
  \[Category( " CustomerProperty " ),  
Description( " LOGO圖標,推薦32\*32位圖 " )\]  
 public  Image Logo  
\{  
 get   
\{  
 return  pictureBox1.Image;  
\}  
 set   
\{  
pictureBox1.Image = value;  
\}  
\}  
  
\[Category( " DataProperty " ),  
Description( " 數據表中用於儲存用戶賬號的字段名稱. " )\]  
 public  string  UserNoField  
\{  
 get   
\{  
 return  userNoField;  
\}  
 set   
\{  
userNoField = value;  
\}  
\}  
\[Category( " DataProperty " ),  
Description( " 數據表中用於儲存用戶密碼的字段名稱. " )\]  
 public  string  PassWordField  
\{  
 get   
\{  
 return  passWordField;  
\}  
 set   
\{  
passWordField = value;  
\}  
\}  
  
\[Category( " DataProperty " ),  
Description( " 數據表中用於儲存用戶備注的字段名稱. " )\]  
 public  string  UserMemoField  
\{  
 get   
\{  
 return  userMemoField;  
\}  
 set   
\{  
userMemoField = value;  
\}  
\}  
  
\[Category( " DataProperty " ),  
Description( " 數據表中用於儲存用戶的表名稱. " )\]  
 public  string  UserTableName  
\{  
 get   
\{  
 return  userTableName;  
\}  
 set   
\{  
userTableName = value;  
\}  
\}  
  
  
 \#endregion    
  
 protected  virtual  void  successful()  
\{  
 if (OnSuccessful != null )  
\{  
OnSuccessful();  
\}  
\}  
 protected  virtual  void  failed()  
\{  
 if (OnFailed != null )  
\{  
OnFailed();  
\}  
\}  
 private  bool  LoadUser()  
\{  
 try   
\{  
userNo.Clear();  
passWord.Clear();  
userMemo.Clear();  
  
  
  
 string  selectStr = "" ;  
  
 if ( this .userNoField != "" )  
\{  
selectStr = this .UserNoField \+ " , " \+ this .PassWordField \+ " , " \+ this .UserMemoField;  
  
\}  
 else   
\{  
selectStr = this .UserNoField \+ " , " \+ this .PassWordField;  
  
\}  
  
  
  
SqlConnection conn = new  SqlConnection (connectionString);  
SqlCommand cmd = new  SqlCommand ( " SELECT  " \+ selectStr \+ "  FROM  " \+ this .UserTableName,conn);  
 if (conn.State != ConnectionState.Open)  
\{  
conn.Open ();  
\}  
SqlDataReader myReader;  
myReader  = cmd.ExecuteReader ();  
 if  (myReader.HasRows)  
\{  
 while  (myReader.Read())  
\{  
UserNo.Add(myReader.GetValue( 0 ).ToString());  
PassWord.Add(myReader.GetValue( 1 ).ToString());  
UserMemo.Add(myReader.GetValue( 2 ).ToString());  
\}  
\}  
 else   
\{  
 return  false ;  
  
 // MessageBox.Show("沒有用戶注冊");   
  \}  
myReader.Close();  
 if (conn.State != ConnectionState.Closed)  
\{  
conn.Close();  
\}  
 return  true ;  
\}  
 catch   
\{  
MessageBox.Show( " 連接服務器失敗! 服務器沒有啟動或您的計算機沒有與網絡連通! " , " 系統提示 " ,MessageBoxButtons.OK,MessageBoxIcon.Stop);  
errorProvider.SetError(btnLogin,  " 連接服務器失敗! 服務器沒有啟動或您的計算機沒有與網絡連通! " );  
 return  false ;  
\}  
  
\}  
  
 private  void  btnLogin\_Click( object  sender, System.EventArgs e)  
\{  
  
 if (LoadUser())  
\{  
 bool  b  =  CheckPassword(UserNo, PassWord);  
 if  (b)  
\{  
successful();  
\}  
 else   
\{  
failed();  
\}  
\}  
  
\}  
  
 ///   
 ///  判斷用戶名和密碼是否正確  
 ///   
 ///  所有用戶  
 ///  所有用戶密碼  
 ///    
  private  bool  CheckPassword(ArrayList alUser,ArrayList alPWD)  
\{  
 string  strUser = "" ;  
 string  strPWD = "" ;  
 if (alUser.Count > 0  &&  alPWD.Count > 0 )  
\{  
 for ( int  i = 0 ;i  < alUser.Count;i \++ )  
\{  
strUser = alUser\[i\].ToString();  
strPWD = alPWD\[i\].ToString().Trim();  
 if (strUser.Trim() == txtUserno.Text.Trim()  &&  strPWD.Trim() == txtPassword.Text.Trim())  
\{  
userIndex = i;  
errorProvider.Dispose();  
 return  true ;  
\}  
 if (i  ==  alUser.Count \- 1 )  
\{  
errorProvider.SetError(btnLogin, ErrorMessage);  
toolTip.SetToolTip(btnLogin,ErrorMessage);  
 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  txtUserno\_KeyPress( object  sender, System.Windows.Forms.KeyPressEventArgs e)  
\{  
 if (e.KeyChar == ( char ) 13 )  
\{  
txtPassword.Focus();  
\}  
\}  
 private  void  txtPassword\_KeyPress( object  sender, System.Windows.Forms.KeyPressEventArgs e)  
\{  
 if (e.KeyChar == ( char ) 13 )  
\{  
btnLogin\_Click(sender, new  EventArgs());  
\}  
\}  
  
  
\}  
\}

[o_08013001.bmp]: /images/20220824/ca099874967c4a58bf18c8547eadbeb8.png