C#怎么实现窗体通讯录系统功能

本文小编为大家详细介绍"C#怎么实现窗体通讯录系统功能"，内容详细，步骤清晰，细节处理妥当，希望这篇"C#怎么实现窗体通讯录系统功能"文章能帮助大家解决疑惑，下面跟着小编的思路慢慢深入，一起来学习新知识吧。

具体如下：

1.首先创建DBhelp类用来连接数据库

代码如下：

using System;using System.Collections.Generic;using System.Linq;using System.Text;using System.Data.SqlClient;using System.Data; namespace TongxunLu{  public static   class DBHelp    {       static  string sqlcon = "Data Source=.;Initial Catalog=TXL;Integrated Security=True";        public static  SqlConnection con = new System.Data.SqlClient.SqlConnection(sqlcon);       public static  SqlCommand cmd = new SqlCommand();          }}

登录页面：

双加登录里面代码：

 private void btnOK_Click(object sender, EventArgs e)        {            //验证用户名与密码非空            if (txtUserName.Text == "")            {                MessageBox.Show("用户名不能为空，请输入！");                txtUserName.Focus();                return;            }            if (txtUserPwd.Text == "")            {                MessageBox.Show("密码不能为空，请输入！");                txtUserPwd.Focus();                return;            }            //定义链接字符串和链接对象                    string sqlcon = "Data Source=.;Initial Catalog=TXL;Integrated Security=True";            SqlConnection con = new System.Data.SqlClient.SqlConnection(sqlcon);            //操作数据库，实现登录功能            try            {                con.Open();                string sqlcomm = "select  distinct COUNT(*) from Users where UserName='" + txtUserName.Text + "'  and Password='" + txtUserPwd.Text + "'";                 SqlCommand cmd = new System.Data.SqlClient.SqlCommand(sqlcomm, con);                //cmd.Connection = con;                //cmd.CommandText = sqlcomm;                 if ((int)cmd.ExecuteScalar() == 1)                {                   // MessageBox.Show("登录成功");                    Users.UserName = txtUserName.Text;                    FrmMain fmain = new FrmMain();                    fmain.Show();                }                else                {                    MessageBox.Show("登录失败");                }                 // MessageBox.Show("数据库打开成功", "提示信息", MessageBoxButtons.OKCancel, MessageBoxIcon.Warning);            }            catch (Exception ex)            {                MessageBox.Show(ex.Message, "提示信息", MessageBoxButtons.OKCancel, MessageBoxIcon.Warning);            }            finally            {                con.Close();                // MessageBox.Show("数据库成功关闭", "提示信息", MessageBoxButtons.OKCancel, MessageBoxIcon.Warning);            }                      }

双击取消，里面代码：

private void btnCacel_Click(object sender, EventArgs e)        {            Application.Exit();        }

输入用户表里面的信息，进行登录：

2.创建主页面：

添加菜单栏、工具栏、状态栏

菜单栏控件：MenuStrip 以mus开头命名

项目名称以tsm开头 项目里的项目以tsmi开头命名

工具栏控件：ToolStrip 项显示图片和文本更改属性DisplayStyle，工具栏：以tst开头

状态栏控件：StatusStrip，状态栏：以tss命名开头

当页面加载那个用户登录，状态用Label控件就显示谁的名字，代码：

 private void FrmMain_Load(object sender, EventArgs e)        {            //接受登录名            toolStripStatusLabel2.Text += Users.UserName;            toolStripStatusLabel3.Text += GetNum(Users.UserName).ToString();           LoadGroup();        }

主页面里面的详细功能代码，如下：

using System;using System.Collections.Generic;using System.ComponentModel;using System.Data;using System.Drawing;using System.Linq;using System.Text;using System.Windows.Forms;using System.Data.SqlClient; namespace TongxunLu{    public partial class FrmMain : Form    {        public FrmMain()        {            InitializeComponent();        }        //显示添加窗体        public void add()        {            frmAdd fadd = new frmAdd();             fadd.Show();        }        //显示修改窗体        public void edit()        {            frmEdit fedit = new frmEdit();            fedit.Show();        }        //显示查询窗体        public void seacher()        {            frmSeach fseacher=new frmSeach ();            fseacher.Show();        }        //统计登录联系人的个数        public int GetNum(string str1)        {            int num = 0;            try            {                DBHelp.con.Open();                string sqlcomm = string.Format("select count(*) from BUsicInfo where UserName='{0}'",str1);                DBHelp.cmd.Connection = DBHelp.con;                DBHelp.cmd.CommandText = sqlcomm;                num = (int)DBHelp.cmd.ExecuteScalar();            }            catch (Exception ex)            {                MessageBox.Show(ex.Message);            }            finally            {                DBHelp.con.Close();            }            return num;         }        //统计登录联系人分组的个数        public int GetGroupsNum()        {            int num = 0;            try            {                DBHelp.con.Open();                string sqlcomm = string.Format("select count(*) from BUsicInfo where UserName='{0}' and  groups='{1}'",Users.UserName,treeView1.SelectedNode.Text );                DBHelp.cmd.Connection = DBHelp.con;                DBHelp.cmd.CommandText = sqlcomm;                num = (int)DBHelp.cmd.ExecuteScalar();            }            catch (Exception ex)            {                MessageBox.Show(ex.Message);            }            finally            {                DBHelp.con.Close();            }            return num;         }         //加载treeview控件         public void LoadGroup()        {            try            {                DBHelp.con.Open();                string sqlcomm = string.Format("select groups from busicInfo where userName='{0}'",Users.UserName);                DBHelp.cmd.Connection = DBHelp.con;                DBHelp.cmd.CommandText = sqlcomm;                SqlDataReader dr = DBHelp.cmd.ExecuteReader();                while(dr.Read())                {                    treeView1.Nodes.Add(dr[0].ToString());                }                dr.Close();             }            catch (Exception ex)            {                MessageBox.Show(ex.Message);            }            finally            {                DBHelp.con.Close();            }        }         //加载ListView控件        public void loadList()        {             if (treeView1.Nodes.Count == 0)            {                MessageBox.Show("请重新加载");                listView1.Items.Clear();                return;            }            if (treeView1.SelectedNode.Index >= 0)            {                listView1.Clear();                listView1.Columns.Add("姓名", 100);                listView1.Columns.Add("工作单位", 100);                listView1.Columns.Add("联系电话", 100);                listView1.Columns.Add("电子邮箱", 100);                listView1.Columns.Add("QQ", 100);                 try                {                    DBHelp.con.Open();                    string sqlcomm = string.Format("select * from busicInfo where userName='{0}' and Groups='{1}'",Users.UserName,treeView1.SelectedNode.Text);                    DBHelp.cmd.CommandText = sqlcomm;                    DBHelp.cmd.Connection = DBHelp.con;                    SqlDataReader dr = DBHelp.cmd.ExecuteReader();                    while(dr.Read())                    {                        ListViewItem lvi = new ListViewItem();                        lvi.Tag = dr[0];                        lvi.Text = dr[3].ToString();                        lvi.SubItems.Add(dr[4].ToString());                        lvi.SubItems.Add(dr[5].ToString());                        lvi.SubItems.Add(dr[6].ToString());                        lvi.SubItems.Add(dr[7].ToString());                        listView1.Items.Add(lvi);                     }                    dr.Close();                 }                catch (Exception ex)                {                    MessageBox.Show(ex.Message);                }                finally                {                    DBHelp.con.Close();                }            }                    }                private void 增加联系人ToolStripMenuItem_Click(object sender, EventArgs e)        {            add();        }         private void toolStripButton1_Click(object sender, EventArgs e)        {            add();        }         private void toolStripButton4_Click(object sender, EventArgs e)        {            seacher();        }         private void FrmMain_Load(object sender, EventArgs e)        {            //接受登录名            toolStripStatusLabel2.Text += Users.UserName;            toolStripStatusLabel3.Text += GetNum(Users.UserName).ToString();           LoadGroup();        }         private void menuStrip1_ItemClicked(object sender, ToolStripItemClickedEventArgs e)        {         }         private void treeView1_AfterSelect(object sender, TreeViewEventArgs e)        {           loadList();           toolStripStatusLabel3.Text = GetGroupsNum().ToString();                    }            }}

3.添加联系人页面

Tablcontrol控件：分页选项:用来分页：基本信息和其他信息

双击确定，里面代码：

 private void btnAdd_Click(object sender, EventArgs e)        {            try            {                DBHelp.con.Open();           DBHelp.cmd.CommandText =string.Format("insert into BusicInfo(userName,Groups,Name,workUnit,Phone,Email,QQ)values('{0}','{1}','{2}','{3}','{4}','{5}','{6}')",Users.UserName,cmbGroup.SelectedValue,txtName.Text,txtWorkUnit.Text,txtPhone.Text,txtEmail.Text,txtQQ.Text);          DBHelp.cmd.Connection = DBHelp.con;          if ((int)DBHelp.cmd.ExecuteNonQuery() == 1)          {              MessageBox.Show("添加成功");           }          else          {              MessageBox.Show("失败");          }            }            catch (Exception ex)            {                MessageBox.Show(ex.Message);            }            finally            {                DBHelp.con.Close();            }         }

加载页面，双击压面，里面代码

 public void LoadGroup()        {            try            {                DBHelp.con.Open();                string sqlcomm = string.Format("select groups from busicInfo where userName='{0}'", Users.UserName);                DBHelp.cmd.Connection = DBHelp.con;                DBHelp.cmd.CommandText = sqlcomm;                SqlDataReader dr = DBHelp.cmd.ExecuteReader();                while (dr.Read())                {                    cmbGroup.Items.Add(dr[0].ToString());                }                dr.Close();             }            catch (Exception ex)            {                MessageBox.Show(ex.Message);            }            finally            {                DBHelp.con.Close();            }        }         private void frmAdd_Load(object sender, EventArgs e)        {            LoadGroup();        }

4.修改页面

5.查询页面

双击查询按钮，里面代码：

private void btnSeach_Click(object sender, EventArgs e)        {             string sqlcomm = "";            if(txtUserName.Text==""&&txtUserPhone.Text=="")            {                sqlcomm = string.Format("select * from  BusicInfo ");                        }            else if (txtUserName.Text == "")            {                sqlcomm = string.Format("select * from  BusicInfo  where Phone='%{0}%' ", txtUserPhone.Text);             }            else if (txtUserPhone.Text == "")            {                sqlcomm = string.Format("select * from  BusicInfo  where UserName='{0}%' ", txtUserName.Text);            }            else            {                sqlcomm = string.Format("select * from  BusicInfo  where UserName='{0}%' and Phone='{1}%' ", txtUserName.Text, txtUserPhone.Text);            }                       try            {                DBHelp.con.Open();                 SqlDataAdapter da = new SqlDataAdapter(sqlcomm,DBHelp.con);                DataSet ds = new DataSet();                               da.Fill(ds);                dataGridView1.DataSource = ds.Tables[0];             }            catch (Exception ex)            {                MessageBox.Show(ex.Message);            }            finally            {                DBHelp.con.Close();            }         }

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