登陆框控件

来源：互联网发布：doe实验设计软件下载编辑：程序博客网时间：2024/05/18 00:09

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();
  }

///

/// 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    {
     strUser=alUser[i].ToString();
     strPWD=alPWD[i].ToString().Trim();
     if(strUser.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();
   }
  }

///

/// 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