C#结合数据库开发通讯录管理系统

通讯录管理系统，数据库关系模式为:账户(账户名,登录密码,头像)，联系人(ID,姓名,电话,QQ,Email)。主要功能包括：注册，登录，注销账号，修改账户名以及密码，更换头像，以及对联系人的增删改查。

工具：Visual Studio 2015,sql server2014

数据库关系表：

Account: Contact:

VS中主要界面及代码：

登录主界面：Login

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.Data.SqlClient;namespace Contact_Manage
{/// <summary>/// 登录/// </summary>public partial class Login : Form{//存取用户登录名public static String txtLogin_Username;public Login(){InitializeComponent();}//登录private void btt_Login_Click(object sender, EventArgs e){//获取用户输入的用户名和密码txtLogin_Username = tB_Account_Username.Text;String password = tB_Account_Password.Text;if (txtLogin_Username == "" || password == ""){MessageBox.Show("请输入用户名和密码！");return;}//连接数据库进行数据判断string sqlcon = "server=.;database=phone_Book;uid=sa;pwd=666888";String sqlcom = " select * from Account where Account_Username='" + txtLogin_Username + "' and Account_password='" + password + "'";SqlConnection con = new SqlConnection(sqlcon);SqlCommand com = new SqlCommand(sqlcom, con);con.Open();SqlDataReader reader = com.ExecuteReader();if (reader.Read()){//打开菜单页面Menu menu = new Menu();menu.Show();}else{MessageBox.Show("用户名或密码错误，请重新输入！");}con.Close();//清空文本框foreach (Control item in this.Controls){if (item is TextBox){item.Text = "";}}}//注册账号事件private void lb_Regist_Click(object sender, EventArgs e){Regist rigist = new Regist();rigist.Show();}//注销账户事件private void lb_Logout_Click(object sender, EventArgs e){//跳出注销界面，验证输入的用户名及密码是否正确Logout logout = new Logout();logout.Show();}//点击密码文本框时将登录头像显示在pictureBox控件中private void tB_Account_Password_MouseClick(object sender, MouseEventArgs e){//获取输入的用户名String username = tB_Account_Username.Text;if (username != ""){//连接数据库，如果该用户名存在则将头像显示string sqlcon = "server=.;database=phone_Book;uid=sa;pwd=666888";String sqlcom = " select * from Account where Account_Username='" + username + "'";SqlConnection con = new SqlConnection(sqlcon);SqlCommand com = new SqlCommand(sqlcom, con);con.Open();SqlDataReader reader = com.ExecuteReader();if (reader.Read()){reader.Close();//连接数据库，获取该用户名的头像保存路径//连接数据库string sqlcon2 = "server=.;database=phone_Book;uid=sa;pwd=666888";String sqlcom2 = "select Account_Image from Account where Account_Username='" + username + "'";SqlConnection con2 = new SqlConnection(sqlcon2);SqlCommand com2 = new SqlCommand(sqlcom2, con2);con2.Open();//返回结果集的第一行第一列object obj = com2.ExecuteScalar();//将数据库中读取到的路径放入变量中String image_Path = obj.ToString();con2.Close();pctrB_Image.Image = Image.FromFile(image_Path);//将图片居中显示pctrB_Image.SizeMode = PictureBoxSizeMode.StretchImage;}else{MessageBox.Show("用户名不存在，请重新输入！");}con.Close();}}}
}

注册窗体（登录界面中点击注册事件时将跳转到此窗体）：Regist

此处更换头像利用了openFileDialog控件打开系统文件会话框,选择图片之后显示在pictureBox控件中,数据库中存放了图片所在的路径，图片的路径可以利用openFileDialog对象.FileName.ToString()获得，点击注册按钮将所有注册信息加入数据库中。

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.Data.SqlClient;namespace Contact_Manage
{public partial class Regist : Form{//默认头像路径public static String imagePath = "F:/VS设计/Contact_Manage/images/1.jpeg";public Regist(){InitializeComponent();}private void btt_Regist_Click(object sender, EventArgs e){//获取用户注册输入的用户名和密码String regist_Username = tB_Regist_Username.Text;String regist_Password1 = tB_Regist_Password1.Text;string regist_Password2 = tB_Regist_Password2.Text;//判断是否输入了用户名和密码if (regist_Username == "" || regist_Password1 == "" || regist_Password2 == ""){MessageBox.Show("请输入用户名和密码！");return;}//判断两次输入的密码是否一致if (!regist_Password1.Equals(regist_Password2)){MessageBox.Show("两次输入的密码不一致，请重新输入！");return;}//连接数据库，判断用户名是否已存在string sqlcon = "server=.;database=phone_Book;uid=sa;pwd=666888";String sqlcom = " select * from Account where Account_Username='" + regist_Username + "'";SqlConnection con = new SqlConnection(sqlcon);SqlCommand com = new SqlCommand(sqlcom, con);con.Open();SqlDataReader reader = com.ExecuteReader();if (reader.Read()){MessageBox.Show("用户名已存在，请重新输入用户名！");return;}reader.Close();//验证通过，将用户输入的数据添加进入数据库String sqlcom2 = " insert into Account(Account_Username,Account_Password,Account_Image) values('" + regist_Username + "','" + regist_Password1 + "','"+imagePath+"')";SqlCommand com2 = new SqlCommand(sqlcom2, con);int eq=com2.ExecuteNonQuery();if(eq!=0){MessageBox.Show("注册成功！将跳转到登录页面！");this.Close();}con.Close();}//当点击用户名文本框时给pictureBox中放置一张默认的图片private void tB_Regist_Username_MouseClick(object sender, MouseEventArgs e){//如果pictureBox为空时显示默认图片if (pctrB_Regist_Image.Image == null){String imagePath = "F:/VS设计/Contact_Manage/images/1.jpeg";pctrB_Regist_Image.Image = Image.FromFile(imagePath);pctrB_Regist_Image.SizeMode = PictureBoxSizeMode.StretchImage;}}private void btt_ChangeImage_Click(object sender, EventArgs e){//自定义OpenFileDialog打开Windows文件对话框选择文件，并保存路径OpenFileDialog f = new OpenFileDialog();f.InitialDirectory = Application.StartupPath + @"\images";f.Filter = "All files (*.*)|*.*|txt files (*.txt)|*.txt";f.FilterIndex = 1;f.RestoreDirectory = true;if (f.ShowDialog() == DialogResult.OK){imagePath = f.FileName.ToString();//将更换的图片显示在注册页面pctrB_Regist_Image.Image = Image.FromFile(imagePath);//将图片居中显示pctrB_Regist_Image.SizeMode = PictureBoxSizeMode.StretchImage;}return;}}
}

注销账号(在登录界面的注销事件中实例化此窗体):Logout

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.Data.SqlClient;namespace Contact_Manage
{/// <summary>/// 注销用户界面/// </summary>public partial class Logout : Form{//注销账号名public static string txtLogoutName;public Logout(){InitializeComponent();}private void btt_Logout_Click(object sender, EventArgs e){//获取用户输入的将要注销的用户名及密码String logout_Username = tB_Logout_Username.Text;String logout_Password = tB_Logout_Password.Text;//判断是否输入了用户名及密码if (logout_Username == "" || logout_Password == ""){MessageBox.Show("请输入要注销的用户名和密码！");return;}//连接数据库进行数据验证String sqlcon = "server=.;database=phone_Book;uid=sa;pwd=666888;";String sqlcom = "select * from Account where Account_Username='"+logout_Username+"' and Account_Password='"+logout_Password+"'";SqlConnection con = new SqlConnection(sqlcon);SqlCommand com = new SqlCommand(sqlcom,con);con.Open();SqlDataReader reader= com.ExecuteReader();if (reader.Read()){//如果密码以及用户名正确，提示用户是否确认注销，确定之后将该用户从数据库中删除txtLogoutName= tB_Logout_Username.Text;Affirm affirm = new Affirm();affirm.Show();}else { MessageBox.Show("你输入的用户名或密码不正确，请重新输入！"); }//清空所有文本框foreach (Control item in this.Controls){if (item is TextBox){item.Text = "";}}con.Close();}}
}

菜单：Menu

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;namespace Contact_Manage
{public partial class Menu : Form{public Menu(){InitializeComponent();}private void btt_Add_Contact_Click(object sender, EventArgs e){AddContact add = new AddContact();add.Show();}private void btt_Manage_Contact_Click(object sender, EventArgs e){Contact_Manage query= new Contact_Manage();query.Show();}//修改密码private void btt_Modification_Password_Click(object sender, EventArgs e){Modification_Password modif_Pwd = new Modification_Password();modif_Pwd.Show();}//更换头像private void btt_Change_Image_Click(object sender, EventArgs e){Change_Image cImg = new Change_Image();cImg.Show();}//修改账户名private void btt_Mdfct_Username_Click(object sender, EventArgs e){Mdfct_Acct_Username m = new Mdfct_Acct_Username();m.Show();}}
}

添加联系人：AddContact

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.Data.SqlClient;namespace Contact_Manage
{/// <summary>/// 添加联系人/// </summary>public partial class AddContact : Form{public AddContact(){InitializeComponent();}private void button1_Click(object sender, EventArgs e){//判断是否有必填项目未输入的情况if (tB_Name.Text.Length == 0 && tB_Phone.Text.Length == 0){MessageBox.Show("姓名电话必须填写！");return;}string sqlcon = "server=.;database=phone_Book;uid=sa;pwd=666888";string sqlcom = "INSERT INTO Contact (Contact_Name,Contact_QQ,Contact_Phone,Contact_Email,Account_Username) VALUES('"+ tB_Name.Text + "','" + tB_QQ.Text + "','" + tB_Phone.Text + "','" + tB_Email.Text + "','"+Login.txtLogin_Username+"')";//执行添加操作SqlConnection con = new SqlConnection(sqlcon);SqlCommand com = new SqlCommand(sqlcom, con);con.Open();int eq = com.ExecuteNonQuery();if (eq != 0){MessageBox.Show("添加成功!");}con.Close();//清空所有文本框foreach (Control item in this.Controls){if (item is TextBox){item.Text = "";}}}}
}

修改密码：Modification_Password

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.Data.SqlClient;namespace Contact_Manage
{//修改密码public partial class Modification_Password : Form{public Modification_Password(){InitializeComponent();}//修改密码事件private void btt_Modification_Password_Click(object sender, EventArgs e){//获取当前登录用户的登录名String modification_Username = Login.txtLogin_Username;//获取用户输入的登录密码以及两次新密码String login_Pwd = tB_Modif_Password.Text;String modif_NewPwd1 = tB_Modif_NewPassword.Text;String modif_NewPwd2 = tB_Modif_NewPassword2.Text;//判断是否输入了原密码if (login_Pwd == ""){MessageBox.Show("请输入密码！");return;}//连接数据库验证原密码是否正确String sqlcon = "server=.;database=phone_Book;uid=sa;pwd=666888;";String sqlcom = "select * from Account where Account_Password='"+login_Pwd+"'";SqlConnection con = new SqlConnection(sqlcon);SqlCommand com = new SqlCommand(sqlcom,con);con.Open();SqlDataReader reader= com.ExecuteReader();if (!reader.Read()){MessageBox.Show("原登录密码错误，请重新输入！");return;}con.Close();//判断用户是否输入了新密码if (modif_NewPwd1 == "" || modif_NewPwd2 == ""){MessageBox.Show("请输入新密码！");return;}//判断两次输入的新密码是否一致if (!modif_NewPwd1.Equals(modif_NewPwd2)){MessageBox.Show("你两次输入的新密码不一致，请重新输入！");return;}//验证通过，进行修改密码操作String sqlcom2 = "update Account set Account_Password='"+modif_NewPwd1+"' where Account_Username='"+modification_Username+"'";SqlConnection con2 = new SqlConnection(sqlcon);SqlCommand com2 = new SqlCommand(sqlcom2, con2);con2.Open();int eq=com2.ExecuteNonQuery();if (eq != 0){MessageBox.Show("修改密码成功思密达！");this.Close();}else MessageBox.Show("修改密码失败思密达！");con2.Close();}//当点击这个文本框时，将用户名显示private void tB_Modif_Password_MouseClick(object sender, MouseEventArgs e){//获取当前登录用户的登录名String modification_Username = Login.txtLogin_Username;tB_Modif_Username.Text = modification_Username;}//当点击这个文本框时，也将用户名显示private void tB_Modif_Username_MouseClick(object sender, MouseEventArgs e){//获取当前登录用户的登录名String modification_Username = Login.txtLogin_Username;tB_Modif_Username.Text = modification_Username;}}
}

更换头像：Change_Image

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.Data.SqlClient;namespace Contact_Manage
{public partial class Change_Image : Form{public Change_Image(){InitializeComponent();}private void btt_Select_Image_Click(object sender, EventArgs e){//自定义OpenFileDialog打开Windows文件对话框选择文件，并保存路径OpenFileDialog f = new OpenFileDialog();f.InitialDirectory = Application.StartupPath + @"\images";f.Filter = "All files (*.*)|*.*|txt files (*.txt)|*.txt";f.FilterIndex = 1;f.RestoreDirectory = true;if (f.ShowDialog() == DialogResult.OK){Regist.imagePath = f.FileName.ToString();//将更换的图片显示在注册页面pictrB_Image.Image = Image.FromFile(Regist.imagePath);//将图片居中显示pictrB_Image.SizeMode = PictureBoxSizeMode.StretchImage;}return;}private void btt_Change_Image_Click(object sender, EventArgs e){if (pictrB_Image.Image != null){string sqlcon = "server=.;database=phone_Book;uid=sa;pwd=666888";String sqlcom2 = "update Account set Account_Image='" + Regist.imagePath + "' where Account_Username='" + Login.txtLogin_Username + "'";SqlConnection con = new SqlConnection(sqlcon);SqlCommand com2 = new SqlCommand(sqlcom2, con);con.Open();int eq = com2.ExecuteNonQuery();if (eq != 0){MessageBox.Show("头像更换成功！");this.Close();}else MessageBox.Show("头像更换失败！");con.Close();}else MessageBox.Show("请选择图片!");}}
}

修改账户名：Mdfct_Acct_Username

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.Data.SqlClient;namespace Contact_Manage
{public partial class Mdfct_Acct_Username : Form{public Mdfct_Acct_Username(){InitializeComponent();}//点击此文本框时跳出当前登录名private void tB_Username_MouseClick(object sender, MouseEventArgs e){tB_Username.Text = Login.txtLogin_Username;}//点击此文本框时跳出当前登录名private void tB_NewUsername_MouseClick(object sender, MouseEventArgs e){tB_Username.Text = Login.txtLogin_Username;}private void btt_Modfct_Username_Click(object sender, EventArgs e){//获取用户输入的新用户名String newUsername = tB_NewUsername.Text;if (newUsername == ""){MessageBox.Show("请输入新用户名！");return;}//连接数据库更改用户名String sqlcon = "server=.;database=phone_Book;uid=sa;pwd=666888;";String sqlcom = "update Account set Account_Username='"+newUsername+"' where Account_Username='"+Login.txtLogin_Username+"'";SqlConnection con = new SqlConnection(sqlcon);SqlCommand com = new SqlCommand(sqlcom, con);con.Open();int eq=com.ExecuteNonQuery();if (eq != 0){MessageBox.Show("修改成功!");this.Close();Login.txtLogin_Username = newUsername;}else MessageBox.Show("修改失败！");}}
}

联系人管理：Contact_Manage

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.Data.SqlClient;
using System.Configuration;namespace Contact_Manage
{public partial class Contact_Manage : Form{//数据库连接字符串string sqlcon = "server=.;database=phone_Book;uid=sa;pwd=666888";public Contact_Manage(){InitializeComponent();}//查询事件private void button1_Click(object sender, EventArgs e){string condition = " 1=1";//姓名if (tB_Name.Text != "")condition = condition + " and Contact_Name like'" + tB_Name.Text + "%'";//电话if (tB_Phone.Text != "")condition = condition + " and Contact_Phone like'" + tB_Phone.Text + "%'";//QQif (tB_QQ.Text != "")condition = condition + " and Contact_QQ like'" + tB_QQ.Text + "%'";//Emailif (tB_Email.Text != "")condition = condition + " and Contact_Email like'" + tB_Email.Text + "%'";//IDif (tB_ID.Text != ""){condition = condition + " and Contact_ID='" + tB_ID.Text + "'";}string sqlcom = "select * from Contact where" + condition;SqlConnection con = new SqlConnection(sqlcon);con.Open();SqlDataAdapter adapter = new SqlDataAdapter(sqlcom, con);//设置默认列不显示//dataGridView1.AutoGenerateColumns = false;DataSet ds = new DataSet();adapter.Fill(ds,"cs");dataGridView1.DataSource = ds.Tables["cs"];//绑定con.Close();//清空所有文本框foreach (Control item in this.Controls){if (item is TextBox){item.Text = "";}}//显示用户名lb_Username.Text = Login.txtLogin_Username;String sqlcom2 = "select Account_Image from Account where Account_Username='" + Login.txtLogin_Username + "'";SqlConnection con2 = new SqlConnection(sqlcon);SqlCommand com2 = new SqlCommand(sqlcom2, con2);con2.Open();//返回结果集的第一行第一列object obj = com2.ExecuteScalar();//将数据库中读取到的路径放入变量中String image_Path = obj.ToString();con2.Close();pctrB_Image.Image = Image.FromFile(image_Path);//将图片居中显示pctrB_Image.SizeMode = PictureBoxSizeMode.StretchImage;}//修改事件private void btt_Modification_Click(object sender, EventArgs e){//获取用户输入的要修改的联系人IDString modification_ID = tB_ID.Text;//如果文本框为空，则说明用户没有点击联系人if (modification_ID != ""){String condition = "";//姓名/* if (tB_Name.Text != "")condition = condition + ",Contact_Name='" + tB_Name.Text + "'";*///电话if (tB_Phone.Text != "")condition = condition + ",Contact_Phone='" + tB_Phone.Text + "'";//QQif (tB_QQ.Text != "")condition = condition + ",Contact_QQ='" + tB_QQ.Text + "'";//Emailif (tB_Email.Text != "")condition = condition + ",Contact_Email='" + tB_Email.Text + "'";String sqlcom = "update Contact set Contact_Name='" + tB_Name.Text + "'" + condition + " where Contact_ID = '" + modification_ID + "'";SqlConnection con = new SqlConnection(sqlcon);SqlCommand com = new SqlCommand(sqlcom, con);con.Open();int eq = com.ExecuteNonQuery();if (eq != 0){MessageBox.Show("修改成功思密达！");}else MessageBox.Show("修改失败思密达！");con.Close();foreach (Control item in this.Controls){if (item is TextBox){item.Text = "";}}}else MessageBox.Show("请先点击联系人再进行修改操作！");}//删除事件private void btt_Delete_Click(object sender, EventArgs e){//获取用户输入的要删除的联系人IDString delete_ID = tB_ID.Text;//连接数据库将该联系人数据删除String sqlcom = "delete from Contact where Contact_ID='" + delete_ID + "'";SqlConnection con = new SqlConnection(sqlcon);SqlCommand com = new SqlCommand(sqlcom, con);con.Open();int eq = com.ExecuteNonQuery();if (eq != 0){MessageBox.Show("删除成功思密达！");}else MessageBox.Show("删除失败思密达！");con.Close();//清空文本框foreach (Control item in this.Controls){if (item is TextBox){item.Text = "";}}}//提示用户进行联系人管理时的操作说明 并显示用户名和头像private void btt_Hint_Click(object sender, EventArgs e){//显示用户名lb_Username.Text = Login.txtLogin_Username;String sqlcom = "select Account_Image from Account where Account_Username='" + Login.txtLogin_Username + "'";SqlConnection con = new SqlConnection(sqlcon);SqlCommand com = new SqlCommand(sqlcom, con);con.Open();//返回结果集的第一行第一列object obj = com.ExecuteScalar();//将数据库中读取到的路径放入变量中String image_Path = obj.ToString();con.Close();pctrB_Image.Image = Image.FromFile(image_Path);//将图片居中显示pctrB_Image.SizeMode = PictureBoxSizeMode.StretchImage;MessageBox.Show("查询：文本框全为空时，点击查询将列出所有数据，除ID之外都为模糊查询。\r删除：点击要删除的行。\r修改：ID不可改");}private void tB_Name_MouseClick(object sender, MouseEventArgs e){//显示用户名lb_Username.Text = Login.txtLogin_Username;String sqlcom = "select Account_Image from Account where Account_Username='" + Login.txtLogin_Username + "'";SqlConnection con = new SqlConnection(sqlcon);SqlCommand com = new SqlCommand(sqlcom, con);con.Open();//返回结果集的第一行第一列object obj = com.ExecuteScalar();//将数据库中读取到的路径放入变量中String image_Path = obj.ToString();con.Close();pctrB_Image.Image = Image.FromFile(image_Path);//将图片居中显示pctrB_Image.SizeMode = PictureBoxSizeMode.StretchImage;}private void dataGridView1_CellMouseClick(object sender, DataGridViewCellMouseEventArgs e){tB_ID.Text = this.dataGridView1.Rows[e.RowIndex].Cells[0].Value.ToString();tB_Name.Text = this.dataGridView1.Rows[e.RowIndex].Cells[1].Value.ToString();tB_QQ.Text = this.dataGridView1.Rows[e.RowIndex].Cells[2].Value.ToString();tB_Phone.Text = this.dataGridView1.Rows[e.RowIndex].Cells[3].Value.ToString();tB_Email.Text = this.dataGridView1.Rows[e.RowIndex].Cells[4].Value.ToString();}}
}

课余时间写了这么个东西，技术不成熟，勿怪，winform入门可做参考！

有需要的可以下载：C#结合数据库开发的通讯录管理系统-C#文档类资源-CSDN下载

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