c# winform部门管理系统

数据库SQL语句脚本代码

CREATE TABLE Department(DepartmentID INT PRIMARY KEY IDENTITY(1,1),Name NVARCHAR(50) NOT NULL
);
SELECT * FROM Department
-- 插入部门数据
INSERT INTO Department (Name) VALUES ('人力资源部');
INSERT INTO Department (Name) VALUES ('技术部');
INSERT INTO Department (Name) VALUES ('市场部');
INSERT INTO Department (Name) VALUES ('销售部');CREATE TABLE Employees_Lists(EmployeeID INT PRIMARY KEY IDENTITY(1,1),Name NVARCHAR(50) NOT NULL,DepartmentID INT,FOREIGN KEY (DepartmentID) REFERENCES Department(DepartmentID)
);
-- 插入员工数据
-- 假设`人力资源部`的DepartmentID是1
INSERT INTO Employees_Lists (Name, DepartmentID) VALUES ('张三', 1);
INSERT INTO Employees_Lists (Name, DepartmentID) VALUES ('李四', 1);-- 假设`技术部`的DepartmentID是2
INSERT INTO Employees_Lists (Name, DepartmentID) VALUES ('王五', 2);
INSERT INTO Employees_Lists (Name, DepartmentID) VALUES ('赵六', 2);-- 假设`市场部`的DepartmentID是3
INSERT INTO Employees_Lists (Name, DepartmentID) VALUES ('孙七', 3);-- 假设`财务部`的DepartmentID是4
INSERT INTO Employees_Lists (Name, DepartmentID) VALUES ('周八', 4);
-- 查询获取数据
SELECT a.Name AS 员工,b.Name AS 部门 FROM Employees_Lists a RIGHT JOIN Department b 
ON a.DepartmentID = b.DepartmentID

C#代码实现

添加部门窗口

using System;
using System.Data.SqlClient;
using System.Windows.Forms;namespace WindowsFormsApp1
{public partial class 添加部门 : Form{// 数据库连接字符串private string connectionString = "server=172.0.0.1;uid=sa1;pwd=xyz@x123456;database=test";// 操作模式枚举enum Mode{Add,Edit}// 当前操作模式private Mode currentMode;private string currentDepartmentName; // 仅在编辑模式下使用public 添加部门(){InitializeComponent();ConfigureForm(Mode.Add, null);}// 修改部门的构造函数public 添加部门(string departmentName){InitializeComponent();ConfigureForm(Mode.Edit, departmentName);}private void ConfigureForm(Mode mode, string departmentName){this.MaximizeBox = false;this.FormBorderStyle = FormBorderStyle.FixedSingle; // 禁止调整窗体大小currentMode = mode;currentDepartmentName = departmentName;if (mode == Mode.Add){this.Text = "添加部门";}else if (mode == Mode.Edit){this.Text = "修改部门 - " + departmentName;departmentNameTextBox.Text = departmentName;btn_adddepartmentName.Text = "修改";}}private void btn_adddepartmentName_Click(object sender, EventArgs e){string departmentName = departmentNameTextBox.Text.Trim();if (!string.IsNullOrEmpty(departmentName)){using (SqlConnection conn = new SqlConnection(connectionString)){// 检查部门是否存在string checkQuery = "SELECT COUNT(*) FROM Department WHERE Name = @Name";using (SqlCommand checkCmd = new SqlCommand(checkQuery, conn)){checkCmd.Parameters.AddWithValue("@Name", departmentName);conn.Open();int count = (int)checkCmd.ExecuteScalar();if (count > 0 && currentMode == Mode.Add){MessageBox.Show("该部门已存在！" + departmentName);}else{if (currentMode == Mode.Add){// 添加新部门string insertQuery = "INSERT INTO Department (Name) VALUES (@Name)";using (SqlCommand insertCmd = new SqlCommand(insertQuery, conn)){insertCmd.Parameters.AddWithValue("@Name", departmentName);insertCmd.ExecuteNonQuery();MessageBox.Show("部门添加成功！");}}else if (currentMode == Mode.Edit){// 修改部门string updateQuery = "UPDATE Department SET Name = @Name WHERE Name = @OldName";using (SqlCommand updateCmd = new SqlCommand(updateQuery, conn)){updateCmd.Parameters.AddWithValue("@Name", departmentName);updateCmd.Parameters.AddWithValue("@OldName", currentDepartmentName);updateCmd.ExecuteNonQuery();//Console.WriteLine("执行修改部门SQL语句脚本：" + updateQuery);MessageBox.Show("部门修改成功！");}}}conn.Close();}}}else{MessageBox.Show("请输入部门名称！");}}}
}

添加员工窗口

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Data.SqlClient;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;namespace WindowsFormsApp1
{public partial class 添加员工数据 : Form{// 数据库连接字符串private string connectionString = "server=172.0.0.1;uid=sa1;pwd=xyz@x123456;database=test";public 添加员工数据(){InitializeComponent();this.MaximizeBox = false;this.FormBorderStyle = FormBorderStyle.FixedSingle; // 禁止调整窗体大小}private void 添加员工数据_Load(object sender, EventArgs e){departmentComboBox.DropDownStyle = ComboBoxStyle.DropDownList; // 设置为下拉列表模式using (SqlConnection conn = new SqlConnection(connectionString)){string query = "SELECT DepartmentID, Name FROM Department";using (SqlCommand cmd = new SqlCommand(query, conn)){SqlDataAdapter da = new SqlDataAdapter(cmd);DataTable dt = new DataTable();da.Fill(dt);departmentComboBox.DisplayMember = "Name";departmentComboBox.ValueMember = "DepartmentID";departmentComboBox.DataSource = dt;}}}private void addButton_Click(object sender, EventArgs e){string employeeName = employeeNameTextBox.Text.Trim();var selectedDepartment = departmentComboBox.SelectedValue;if (!string.IsNullOrEmpty(employeeName) && selectedDepartment != null){using (SqlConnection conn = new SqlConnection(connectionString)){string query = "INSERT INTO Employees_Lists (Name, DepartmentID) VALUES (@Name, @DepartmentID)";using (SqlCommand cmd = new SqlCommand(query, conn)){cmd.Parameters.AddWithValue("@Name", employeeName);cmd.Parameters.AddWithValue("@DepartmentID", selectedDepartment);conn.Open();cmd.ExecuteNonQuery();conn.Close();}}MessageBox.Show("员工添加成功！");}else{MessageBox.Show("请输入员工信息并选择部门！");}}}
}

主窗口

using System;
using System.Collections.Generic;
using System.Data;
using System.Data.SqlClient;
using System.Threading.Tasks;
using System.Windows.Forms;namespace WindowsFormsApp1
{public partial class 树结构 : Form{// 数据库连接字符串private string connectionString = "server=172.0.0.1;uid=sa1;pwd=xyz@x123456;database=test";public 树结构(){InitializeComponent();this.treeView1.NodeMouseClick += new TreeNodeMouseClickEventHandler(this.treeView1_NodeMouseClick);LoadDepartmentsAsync();}private async void LoadDepartmentsAsync(){List<Department> departments = await GetDepartmentsAsync();if (this.dgvDepartments.InvokeRequired){this.dgvDepartments.Invoke(new Action(() => {SetupDepartmentsDataGridView(departments);}));}else{SetupDepartmentsDataGridView(departments);}}private void SetupDepartmentsDataGridView(List<Department> departments){this.dgvDepartments.DataSource = departments;// 设置 DataGridView 为只读this.dgvDepartments.ReadOnly = true;// 根据内容自动调整列宽度this.dgvDepartments.AutoSizeColumnsMode = DataGridViewAutoSizeColumnsMode.Fill;// 根据内容自动调整行高度（如果需要）this.dgvDepartments.AutoSizeRowsMode = DataGridViewAutoSizeRowsMode.DisplayedCells;// 调用添加编辑按钮的方法AddEditButtonColumn();}private void AddEditButtonColumn(){if (!dgvDepartments.Columns.Contains("EditButton")){DataGridViewButtonColumn editButtonColumn = new DataGridViewButtonColumn();editButtonColumn.HeaderText = "操作";editButtonColumn.Name = "EditButton";editButtonColumn.Text = "修改";editButtonColumn.UseColumnTextForButtonValue = true; // 这一行确保每个单元格显示"Edit"dgvDepartments.Columns.Add(editButtonColumn);// 为按钮点击事件添加事件处理程序dgvDepartments.CellClick += dgvDepartments_CellClick;}/*if (!dgvDepartments.Columns.Contains("AnotherEditButton")){DataGridViewButtonColumn anotherEditButtonColumn = new DataGridViewButtonColumn();anotherEditButtonColumn.HeaderText = "操作";anotherEditButtonColumn.Name = "AnotherEditButton";anotherEditButtonColumn.Text = "编辑";anotherEditButtonColumn.UseColumnTextForButtonValue = true; // 这一行确保每个单元格显示"Edit"dgvDepartments.Columns.Add(anotherEditButtonColumn);// 为按钮点击事件添加事件处理程序dgvDepartments.CellClick += dgvDepartments_CellClick;}*/}private void dgvDepartments_CellClick(object sender, DataGridViewCellEventArgs e){if (e.ColumnIndex == dgvDepartments.Columns["EditButton"].Index && e.RowIndex >= 0){DataGridViewRow row = dgvDepartments.Rows[e.RowIndex];row.ReadOnly = false; // 允许编辑当前行// 获取当前行部门名称string departmentName = row.Cells["Name"].Value.ToString();// 创建并显示编辑窗口添加部门 editDepartmentForm = new 添加部门(departmentName); // 假设"DepartmentNameColumn"是包含部门名称的列的名称editDepartmentForm.ShowDialog(); // 以模态方式打开编辑窗口LoadDepartmentsAsync();//MessageBox.Show($"Edit clicked for row {e.RowIndex}");}}private Task<List<Department>> GetDepartmentsAsync(){return Task.Run(() =>{List<Department> departments = new List<Department>();using (var conn = new SqlConnection(connectionString)){conn.Open();var cmd = new SqlCommand("SELECT * FROM Department", conn);using (var reader = cmd.ExecuteReader()){while (reader.Read()){departments.Add(new Department{DepartmentID = reader.GetInt32(0),Name = reader.GetString(1),});}}}return departments;});}public class Department{public int DepartmentID { get; set; }public string Name { get; set; }}private void LoadDataButton_Click(object sender, EventArgs e){treeView1.Nodes.Clear();using (SqlConnection conn = new SqlConnection(connectionString)){conn.Open();// 加载部门using (SqlCommand cmd = new SqlCommand("SELECT DepartmentID, Name FROM Department", conn)){using (SqlDataReader reader = cmd.ExecuteReader()){while (reader.Read()){TreeNode deptNode = new TreeNode(reader["Name"].ToString());deptNode.Tag = reader["DepartmentID"];treeView1.Nodes.Add(deptNode);// 加载当前部门的员工LoadEmployeesForDepartment(deptNode);}}}}}private void LoadEmployeesForDepartment(TreeNode deptNode){int departmentId = (int)deptNode.Tag;using (SqlConnection conn = new SqlConnection(connectionString)){conn.Open();using (SqlCommand cmd = new SqlCommand("SELECT Name FROM Employees_Lists WHERE DepartmentID = @DepartmentID", conn)){cmd.Parameters.AddWithValue("@DepartmentID", departmentId);using (SqlDataReader reader = cmd.ExecuteReader()){while (reader.Read()){TreeNode empNode = new TreeNode(reader["Name"].ToString());deptNode.Nodes.Add(empNode);}}}}}/// <summary>/// 点击树结构中的部门获取数据库中员工的信息/// </summary>/// <param name="sender"></param>/// <param name="e"></param>private void treeView1_NodeMouseClick(object sender, TreeNodeMouseClickEventArgs e){// 清除DataGridView中当前的数据dataGridView1.DataSource = null;dataGridView1.Rows.Clear();dataGridView1.ReadOnly = true;dataGridView1.AllowUserToAddRows = false;//删除空白行// 判断点击的是否是部门节点（通过检查Tag是否包含DepartmentID）if (e.Node.Nodes.Count == 0 && e.Node.Parent != null){string employeeName = e.Node.Text; // 获取员工名字DataTable dataTable = new DataTable();using (SqlConnection conn = new SqlConnection(connectionString)){// 修改查询语句仅查询被点击的员工信息，这里假设每个员工名字是唯一的string query = "SELECT Name AS 员工, DepartmentID AS 部门Id FROM Employees_Lists WHERE Name = @EmployeeName";using (SqlCommand cmd = new SqlCommand(query, conn)){cmd.Parameters.AddWithValue("@EmployeeName", employeeName);using (SqlDataAdapter adapter = new SqlDataAdapter(cmd)){adapter.Fill(dataTable);}}}// 将加载的数据显示在DataGridView中dataGridView1.DataSource = dataTable;// 将加载的数据显示在DataGridView中dataGridView1.DataSource = dataTable;}// 判断点击的是否是部门节点（通过检查Tag是否包含DepartmentID）else if (e.Node.Tag != null && int.TryParse(e.Node.Tag.ToString(), out int departmentId)){// 从数据库加载该部门下的所有员工信息DataTable dataTable = new DataTable();using (SqlConnection conn = new SqlConnection(connectionString)){string query = "SELECT a.Name AS 员工, b.Name AS 部门 FROM Employees_Lists a LEFT JOIN Department b ON a.DepartmentID = b.DepartmentID WHERE a.DepartmentID = @DepartmentID";using (SqlCommand cmd = new SqlCommand(query, conn)){cmd.Parameters.AddWithValue("@DepartmentID", departmentId);using (SqlDataAdapter adapter = new SqlDataAdapter(cmd)){adapter.Fill(dataTable);}}}// 将加载的数据显示在DataGridView中dataGridView1.DataSource = dataTable;}}private void Btn_AddDepartment_Click(object sender, EventArgs e){Form AddDepartment = new 添加部门();AddDepartment.StartPosition = FormStartPosition.CenterScreen;AddDepartment.ShowDialog();}private void Btn_AddEmployee_Click(object sender, EventArgs e){Form AddEmployee = new 添加员工数据();AddEmployee.StartPosition = FormStartPosition.CenterScreen;AddEmployee.ShowDialog();}}
}