C#做的一個登陸控件,圖是用自已做的截圖軟件截的

一個登陸控件,圖是用自已做的截圖軟件截的

 

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()); 
            } 
        } 

        
    } 
}