C#窗体通讯录系统的示例代码

本文主要介绍了C#窗体通讯录系统的示例代码，文中通过示例代码介绍的非常详细，对大家的学习或者工作具有一定的参考学习价值，需要的朋友们下面随着小编来一起学习学习吧

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(); } }

功能未完全实现，只是例子。

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