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登陆框控件

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好久以前作的东西,最近拿出来溜溜,最近一直没有作应用程序方面的东西了,有点生疏! 希望我的这篇东西能对您有所帮助,大家共同探讨共同进步,此文章比较简单!是作一个通用的登陆框控件!

首先建一解决项目LoginControl,添加一个类库的项目LoginControl,然后添加用户控件ctlLogin

然后在ctlLogin.cs文件中写代码

//ctlLogin.cs

using System;using System.Collections;using System.ComponentModel;using System.Drawing;using System.Data;using System.Windows.Forms;using System.Text;

namespace LoginControl{ ///

 /// ctlLogin 的摘要说明。 ///  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;  ///   /// 必需的设计器变量。  ///   private System.ComponentModel.Container components = null;

  public event System.EventHandler Successful;  public event System.EventHandler Failed;

  private ArrayList strUsername=new ArrayList();  private ArrayList strPassword=new ArrayList();  private int index=-1;

  private string ErrMsg = "请输入正确的用户名和密码!";

  public ctlLogin()  {   // 该调用是 Windows.Forms 窗体设计器所必需的。   InitializeComponent();

   // TODO: 在 InitializeComponent 调用后添加任何初始化   strUsername.Clear();   strPassword.Clear();  }[page]

  ///

  /// 清理所有正在使用的资源。  ///   protected override void Dispose( bool disposing )  {   if( disposing )   {    if(components != null)    {     components.Dispose();    }   }   base.Dispose( disposing );  }

  #region 组件设计器生成的代码  ///

  /// 设计器支持所需的方法 - 不要使用代码编辑器   /// 修改此方法的内容。  ///   private void InitializeComponent()  {   System.Resources.ResourceManager resources = new System.Resources.ResourceManager(typeof(ctlLogin));   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.ActiveCaptionText;   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)(resources.GetObject("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 = "lText";   this.lText.Size = new System.Drawing.Size(360, 20);   this.lText.TabIndex = 5;   this.lText.Text = "请输入您的用户名和密码.";   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(384, 20);   this.lHeader.TabIndex = 4;   this.lHeader.Text = "登陆";   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(376, 292);   this.btnLogin.Name = "btnLogin";   this.btnLogin.Size = new System.Drawing.Size(70, 20);   this.btnLogin.TabIndex = 14;   this.btnLogin.Text = "登 陆";   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 = "密  码";   this.lPassword.TextAlign = System.Drawing.ContentAlignment.MiddleRight;   //    // lUsername   //    this.lUsername.Font = new System.Drawing.Font("Tahoma", 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 = "用户名";   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.Enter += 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)  {//   strUsername.Add(txtUsername.Text.Trim());//   strPassword.Add(txtPassword.Text.Trim());  }

  private void txtPassword_KeyPress(object sender, System.Windows.Forms.KeyPressEventArgs e)  {   if(e.KeyChar==(char)13)   {    btnLogin_Click(sender,new EventArgs());   }  }

  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());   }  }

  ///

  /// 判断用户名和密码是否正确  ///   /// 所有用户  /// 所有用户密码  ///   private bool CheckPassword(ArrayList alUser,ArrayList alPWD)  {   string strUser="";   string strPWD="";   if(alUser.Count>0 && alPWD.Count>0)   {    for(int i=0;i [page]

  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();   }  }  

  ///

  /// 所有用户  ///   public ArrayList Username  {   get   {    return strUsername;   }   set   {    strUsername = value;   }   }

  ///

  /// 所有用户密码  ///   public ArrayList Password  {   get   {    return strPassword;   }   set   {    strPassword = value;   }  }

  ///

  /// 在用户数组Username中的索引  ///   public int Index_Username  {   get   {    return index;   }   set   {    index=value;   }  }

  ///

  /// 错误信息  ///   public string ErrorMessage  {   get   {    return ErrMsg;   }   set   {    ErrMsg = value;   }  } }}

 

接着,您就可以编译成LoginControl.dll

再在解决项目中添加一个测试项目Test,然后在工具箱中添加/移除项中添加刚才编译的LoginControl.dll,添加一测试界面为frmTest,然后在工具箱中把ctlLogin控件拖到frmTest页面中

然后在frmTest.cs中来测试刚才的控件

//frmTest.cs

using System;using System.Drawing;using System.Collections;using System.ComponentModel;using System.Windows.Forms;using System.Data;using InformationClass;   //自己写的一个测试类

namespace Test{ ///

 /// Form1 的摘要说明。 ///  public class frmTest : System.Windows.Forms.Form {  private LoginControl.ctlLogin ctlLogin;  ///   /// 必需的设计器变量。  ///   private System.ComponentModel.Container components = null;

  private Users objUsers=new Users();   //实例化自定义的登陆用户集合类  private User m_objUser=new User();    //实例化自定义的登陆用户类

  public frmTest()  {   //   // Windows 窗体设计器支持所必需的   //   InitializeComponent();

   //   // TODO: 在 InitializeComponent 调用后添加任何构造函数代码   //  }

  ///

  /// 清理所有正在使用的资源。  ///   protected override void Dispose( bool disposing )  {   if( disposing )   {    if (components != null)     {     components.Dispose();    }   }   base.Dispose( disposing );  }

  #region Windows 窗体设计器生成的代码  ///

  /// 设计器支持所需的方法 - 不要使用代码编辑器修改  /// 此方法的内容。  ///   private void InitializeComponent()  {   System.Resources.ResourceManager resources = new System.Resources.ResourceManager(typeof(frmTest));   this.ctlLogin = new LoginControl.ctlLogin();   this.SuspendLayout();   //    // ctlLogin   //    this.ctlLogin.ErrorMessage = "请输入正确的用户名和密码!";   this.ctlLogin.Index_Username = -1;   this.ctlLogin.Location = new System.Drawing.Point(0, 0);   this.ctlLogin.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)(resources.GetObject("$this.Icon")));   this.MaximizeBox = false;   this.MinimizeBox = false;   this.Name = "frmTest";   this.Text = "系统登陆";   this.Load += new System.EventHandler(this.Form1_Load);   this.ResumeLayout(false);

  }  #endregion

  ///

  /// 应用程序的主入口点。  ///   [STAThread]  static void Main()   {   Application.Run(new frmTest());  }

  private void ctlLogin_Failed(object sender, System.EventArgs e)  {   MessageBox.Show("登陆失败！请输入正确的用户名和密码！!","信息提示",MessageBoxButtons.OK,MessageBoxIcon.Error);  }

  private void ctlLogin_Successful(object sender, System.EventArgs e)  {   m_objUser=objUsers[ctlLogin.Index_Username];   MessageBox.Show("登陆成功!","信息提示",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);    }   }  } }}

 

运行程序

如果登陆失败就会出现

 

如果登陆成功

 

就这样,小小的一个登陆控件就作好了,希望我的这篇文章能对于刚学没有多久的.NET程序员有所帮助如果有什么不足的地方,希望您能指正,谢谢
　登陆框控件相关说明
　登陆框控件相关说明

 

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