C#.net开发基于WinForm的简单图书馆系统(附源码地址)

C#.net开发基于WinForm的简单图书馆系统,采用了三层架构,CS模式,数据库用sql server,代码可用来学习和参考
github链接:https://github.com/CodeZno1/librarySystem
这是系统的架构
C#.net开发基于WinForm的简单图书馆系统(附源码地址)_第1张图片

Model层的代码

namespace Model
{
    public class Admin
    {
        public int ID { get; set; }
        public string username { get; set; }
        public string password { get; set; }

    }
}

namespace Model
{
    public class BookInfo
    {
        public int ID { get; set; }
        public string name { get; set; }
        public int count { get; set; }
        public string category1 { get; set; }
        public string category2 { get; set; }
        public string category3 { get; set; }

        public string addr { get; set; }
    }
namespace Model
{
    public class Category
    {
        public string[] category1 = new string[] { "玄幻", "都市", "仙侠" };
        public string[,] category2 = new string[,] { { "东方玄幻", "异世大陆", "高武世界" }, { "都市生活", "恩怨情仇", "青春校园" }, { "修真文明", "现代修真", "古典仙侠" } };
        public string[,,] category3 = new string[,,] { { { "圣墟", "太初", "牧神", "武炼", "银霸" }, { "天尊", "监武","造化", "诸天", "万古"}, { "霸皇", "纯阳", "藏经", "星河", "神门" } },{ { "真聊", "纯真","今朝",
                    "重生","美食" }, { "市武", "侠警", "黑金", "纵横", "杀戮" },{ "似水", "重返", "沸腾", "心动", "天才" } }, { { "极道", "天魔", "大劫", "夏纪", "飞仙" },{ "数据", "无限", "悠闲", "仙尊", "夺运" },
                { "问道", "聊斋", "蜀山", "证道", "太玄" } } };

        public Category()
        {

        }
    }
}

BLL层的代码

namespace BLL
{
    public class Admin_BLL
    {
        Admin_DAL aa = new Admin_DAL();

        //删除管理员
        public int deleteAdmin(String username)
        {
            return aa.deleteAdmin(username);
        }
        //修改管理员
        public int ExitAdmin(Admin a)
        {
            return aa.ExitAdmin(a);
        }
        //添加管理员
        public int AddAdmin(Admin a)
        {
            return aa.AddAdmin(a);
        }
        public DataSet selectAdmin()
        {
            return aa.selectAdmin();
        }


        public int Scalar(Admin a)
        {
            return aa.Scalar(a);
        }
    }
}
namespace BLL
{
    public class BookInfo_BLL
    {
        BookInfo_DAL bf = new BookInfo_DAL();

        public int deleteBookInfo(string id)
        {
            return bf.deleteBookInfo(id);
        }

        public int upadeBookInfo(BookInfo info)
        {
            return bf.updateBookInfo(info);
        }

        public DataTable getAllInfo()
        {
            try
            {
                SqlDataReader objReader = bf.selectBookInfo(); ;
                if (!objReader.HasRows)
                {
                    return null;
                }
                DataTable dt = new DataTable();
                dt.Columns.AddRange(new DataColumn[] { new DataColumn("ID"), new DataColumn("名字"), new DataColumn("数量"), new DataColumn("类别1"), new DataColumn("类别2"), new DataColumn("类别3"), new DataColumn("地址") });
                while (objReader.Read())
                {
                    dt.Rows.Add(new object[] { Convert.ToString(objReader["ID"]), (string)objReader["name"], Convert.ToString(objReader["count"]), (string)objReader["category1"], (string)objReader["category2"], (string)objReader["category3"], (string)objReader["addr"] });
                }
                objReader.Close();
                return dt;
            }
            catch (Exception ex)
            {
                throw ex;
            }
        }

        public int addInfo(BookInfo info)
        {
            return bf.AddBookInfo(info);
        }

        public DataTable queryInfo(BookInfo info)
        {
            try
            {
                SqlDataReader objReader = bf.query(info); ;
                if (!objReader.HasRows)
                {
                    return null;
                }
                DataTable dt = new DataTable();
                dt.Columns.AddRange(new DataColumn[] { new DataColumn("ID"), new DataColumn("名字"), new DataColumn("数量"), new DataColumn("类别1"), new DataColumn("类别2"), new DataColumn("类别3"), new DataColumn("地址") });
                while (objReader.Read())
                {
                    dt.Rows.Add(new object[] { Convert.ToString(objReader["ID"]), (string)objReader["name"], Convert.ToString(objReader["count"]), (string)objReader["category1"], (string)objReader["category2"], (string)objReader["category3"], (string)objReader["addr"] });
                }
                objReader.Close();
                return dt;
            }
            catch (Exception ex)
            {
                throw ex;
            }
        }

        public int getTotal1(string category1)
        {
            try
            {
                int count = 0;
                SqlDataReader objReader = bf.selectTotal1(category1);
                if (!objReader.HasRows)
                {
                    return 0;
                }
                while (objReader.Read())
                {
                    count++;
                }
                objReader.Close();
                return count;
            }
            catch (Exception ex)
            {
                throw ex;
            }
        }

        public int getTotal2(string category1, string category2)
        {
            try
            {
                int count = 0;
                SqlDataReader objReader = bf.selectTotal2(category1, category2);
                if (!objReader.HasRows)
                {
                    return 0;
                }
                while (objReader.Read())
                {
                    count++;
                }
                objReader.Close();
                return count;
            }
            catch (Exception ex)
            {
                throw ex;
            }
        }

        public int getTotal3(string category1, string category2, string category3)
        {
            try
            {
                int count = 0;
                SqlDataReader objReader = bf.selectTotal3(category1, category2, category3);
                if (!objReader.HasRows)
                {
                    return 0;
                }
                while (objReader.Read())
                {
                    count++;
                }
                objReader.Close();
                return count;
            }
            catch (Exception ex)
            {
                throw ex;
            }
        }
    }
}

DAL层的代码

namespace DAL
{
    public class Admin_DAL
    {
        /// 
        /// 查询全部
        /// 
        /// 
        public DataSet selectAdmin()
        {
            string sql = @"select * from Admin";
            return DBhelp.Create().ExecuteAdater(sql);
        }
        /// 
        /// 删除管理员
        /// 
        /// 
        /// 
        public int deleteAdmin(string username)
        {
            string sql = "delete from Admin where username=@username";
            SqlParameter[] sp ={
                                  new SqlParameter("@username",username)
                              };
            return DBhelp.Create().ExecuteNonQuery(sql, sp: sp);
        }
        /// 
        /// 修改管理员
        /// 
        /// 
        /// 
        public int ExitAdmin(Admin a)
        {
            string sql = "update Admin set username=@username,password=@password where username=@username";
            SqlParameter[] sp = {
                                new SqlParameter("username",a.username),
                                new SqlParameter("password",a.password)
                                };
            return DBhelp.Create().ExecuteNonQuery(sql, sp: sp);
        }
        /// 
        /// 添加管理员
        /// 
        /// 
        /// 
        public int AddAdmin(Admin a)
        {
            string sql = "insert into Admin select @username,@password";
            SqlParameter[] sp ={
                                new SqlParameter("username",a.username),
                                new SqlParameter("password",a.password)
                              };
            return DBhelp.Create().ExecuteNonQuery(sql, sp: sp);
        }

        /// 
        /// 查询相同用户
        /// 
        /// 
        /// 
        public int Scalar(Admin a)
        {
            string sql = "select COUNT(*) from Admin where username=@username and password=@password";
            SqlParameter[] sp ={
                                new SqlParameter("@username",a.username),
                                new SqlParameter("@password",a.password)
                              };
            return DBhelp.Create().ExecuteScalar(sql, sp);
        }
    }
}
namespace DAL
{
    public class BookInfo_DAL
    {
        /// 
        /// 查询全部
        /// 
        /// 
        public SqlDataReader selectBookInfo()
        {
            string sql = @"select * from BookInfo";
            return DBhelp.Create().ExecuteReader(sql);
        }

        public int deleteBookInfo(string ID)
        {
            string sql = "delete from BookInfo where ID=@ID";
            SqlParameter[] sp ={
                                  new SqlParameter("@ID",ID)
                              };
            return DBhelp.Create().ExecuteNonQuery(sql, sp: sp);
        }

        public int updateBookInfo(BookInfo info)
        {
            string sql = "update BookInfo set name=@name,count=@count,category1=@category1,category2=@category2,category3=@category3,addr=@addr where ID=@ID";
            SqlParameter[] sp = {
                                new SqlParameter("ID",info.ID),
                                new SqlParameter("name",info.name),
                                new SqlParameter("count",info.count),
                                new SqlParameter("category1",info.category1),
                                new SqlParameter("category2",info.category2),
                                new SqlParameter("category3",info.category3),
                                new SqlParameter("addr",info.addr)
                                };
            return DBhelp.Create().ExecuteNonQuery(sql, sp: sp);
        }

        public int AddBookInfo(BookInfo info)
        {
            string sql = "insert into BookInfo (name,count,category1,category2,category3,addr) values( @name,@count,@category1,@category2,@category3,@addr )";
            SqlParameter[] sp = {
                                new SqlParameter("name",info.name),
                                new SqlParameter("count",info.count),
                                new SqlParameter("category1",info.category1),
                                new SqlParameter("category2",info.category2),
                                new SqlParameter("category3",info.category3),
                                new SqlParameter("addr",info.addr)
                                };
            return DBhelp.Create().ExecuteNonQuery(sql, sp: sp);
        }

        public SqlDataReader query(BookInfo info)
        {
            string sql = @"select * from BookInfo where name like '%'+@name+'%' and ID = @ID and category1 = @category1 and category2 = @category2 and category3 = @category3";
            SqlParameter[] sp = {
                                new SqlParameter("name",info.name),
                                new SqlParameter("ID",info.ID),
                                new SqlParameter("category1",info.category1),
                                new SqlParameter("category2",info.category2),
                                new SqlParameter("category3",info.category3),
                                };
            return DBhelp.Create().ExecuteReader(sql, sp: sp);
        }

        public SqlDataReader selectTotal1(string category1)
        {
            string sql = @"select * from BookInfo where category1 = @category1";
            SqlParameter[] sp = {
                                new SqlParameter("category1",category1)
                                };
            return DBhelp.Create().ExecuteReader(sql, sp: sp);
        }

        public SqlDataReader selectTotal2(string category1, string category2)
        {
            string sql = @"select * from BookInfo where category1 = @category1 and category2 = @category2";
            SqlParameter[] sp = {
                                new SqlParameter("category1",category1),
                                new SqlParameter("category2",category2),
                                };
            return DBhelp.Create().ExecuteReader(sql, sp: sp);
        }

        public SqlDataReader selectTotal3(string category1, string category2 , string category3)
        {
            string sql = @"select * from BookInfo where category1 = @category1 and category2 = @category2 and category3 = @category3";
            SqlParameter[] sp = {
                                new SqlParameter("category1",category1),
                                new SqlParameter("category2",category2),
                                new SqlParameter("category3",category3),
                                };
            return DBhelp.Create().ExecuteReader(sql, sp: sp);
        }
    }
}
namespace DAL
{
    class DBhelp
    {
        private DBhelp() { }
        private static DBhelp dbhelp = null;
        public static DBhelp Create()
        {
            if (dbhelp == null)
                dbhelp = new DBhelp();
            return dbhelp;
        }

        string conString = ConfigurationManager.ConnectionStrings["a"].ConnectionString;

        //返回一行一列
        public int ExecuteScalar(string sql, params SqlParameter[] sp)
        {
            SqlConnection con = new SqlConnection(conString);

            try
            {
                con.Open();
                SqlCommand com = new SqlCommand(sql, con);
                com.Parameters.AddRange(sp);
                return (int)com.ExecuteScalar();
            }
            catch (Exception)
            {
                con.Close();
                throw;
            }
            finally
            {
                con.Close();
            }

        }

        //返回读取器对象
        public SqlDataReader ExecuteReader(string sql, params SqlParameter[] sp)
        {
            SqlConnection con = new SqlConnection(conString);
            try
            {
                con.Open();
                SqlCommand com = new SqlCommand(sql, con);
                com.Parameters.AddRange(sp);
                return com.ExecuteReader(CommandBehavior.CloseConnection);
            }
            catch (Exception ex)
            {
                con.Close();
                throw ex;
            }
        }

        //返回数据集,
        public DataSet ExecuteAdater(string sql, params SqlParameter[] sp)
        {
            SqlConnection con = new SqlConnection(conString);

            try
            {
                SqlCommand com = new SqlCommand(sql, con);
                com.Parameters.AddRange(sp);
                SqlDataAdapter adapter = new SqlDataAdapter(com);
                DataSet ds = new DataSet();
                adapter.Fill(ds, "a");
                return ds;
            }
            catch (Exception)
            {
                throw;
            }
            finally
            {
                con.Close();
            }


        }

        //返回受影响行数
        public int ExecuteNonQuery(string sql, CommandType type = CommandType.Text, params SqlParameter[] sp)
        {
            SqlConnection con = new SqlConnection(conString);
            try
            {
                con.Open();
                SqlCommand com = new SqlCommand(sql, con);
                com.Parameters.AddRange(sp);
                com.CommandType = type;
                return com.ExecuteNonQuery();
            }
            catch (Exception)
            {
                con.Close();
                throw;
            }
            finally
            {
                con.Close();
            }

        }
    }
}

主界面代码

namespace 简单图书馆系统
{
    public partial class FrmMain : Form
    {
        public FrmMain()
        {
            InitializeComponent();

            SetStyle(ControlStyles.UserPaint, true);
            SetStyle(ControlStyles.AllPaintingInWmPaint, true); // 禁止擦除背景.
            SetStyle(ControlStyles.DoubleBuffer, true); // 双缓冲

            lbTitle.BackColor = Color.Transparent;
            pictureBoxExit.BackColor = Color.Transparent;

            category = new Category();

            cbCategory1.DataSource = category.category1;
        }

        public Admin admin = null;
        public Category category = null;

        BookInfo_BLL bfBLL = new BookInfo_BLL();
        private void FrmMain_FormClosed(object sender, FormClosedEventArgs e)
        {
            Application.Exit();
        }

        private void pictureBox2_Click(object sender, EventArgs e)
        {
            Application.Exit();
        }

        private void tbCount_KeyPress(object sender, KeyPressEventArgs e)
        {
            if (e.KeyChar == 0x20) e.KeyChar = (char)0;  //禁止空格键  
            if ((e.KeyChar == 0x2D) && (((TextBox)sender).Text.Length == 0)) return;   //处理负数  
            if (e.KeyChar > 0x20)
            {
                try
                {
                    double.Parse(((TextBox)sender).Text + e.KeyChar.ToString());
                }
                catch
                {
                    e.KeyChar = (char)0;   //处理非法字符  
                }
            }
        }

        private void cbCategory1_SelectedIndexChanged(object sender, EventArgs e)
        {
            List<string> c2 = new List<string>();
            for (int i = 0; i < 3; i++)
            {
                c2.Add(category.category2[cbCategory1.SelectedIndex, i]);
            }
            cbCategory2.DataSource = c2;
        }

        private void pictureBoxMin_Click(object sender, EventArgs e)
        {
            this.WindowState = FormWindowState.Minimized;
        }

        private void btnAdd_Click(object sender, EventArgs e)
        {
            if (tbName.Text.Trim() != "" && tbCount.Text.Trim() != "")
            {
                BookInfo newBf = new BookInfo();
                newBf.name = tbName.Text;
                newBf.count = Convert.ToInt32(tbCount.Text);
                newBf.category1 = cbCategory1.SelectedItem.ToString();
                newBf.category2 = cbCategory2.SelectedItem.ToString();
                newBf.category3 = cbCategory3.SelectedItem.ToString();
                newBf.addr = "未填写";
                int result = bfBLL.addInfo(newBf);

                MessageBox.Show("成功增加" + result.ToString() + "条信息!");
            }
            else
            {
                MessageBox.Show("请填写必要的内容");
            }
        }

        private void cbCategory2_SelectedIndexChanged(object sender, EventArgs e)
        {
            List<string> c3 = new List<string>();
            for (int i = 0; i < 5; i++)
            {
                c3.Add(category.category3[cbCategory1.SelectedIndex, cbCategory2.SelectedIndex, i]);
            }
            cbCategory3.DataSource = c3;
        }

        private void tabControl1_SelectedIndexChanged(object sender, EventArgs e)
        {
            switch (tabControl1.SelectedIndex)
            {
                case 1:
                    {
                        DataTable dt = bfBLL.getAllInfo();
                        dataGridViewDel.DataSource = dt;
                        if (dt != null)
                        {
                            dataGridViewDel.Columns[0].Width = 50;
                            dataGridViewDel.Columns[1].Width = 350;
                            dataGridViewDel.Columns[2].Width = 100;
                            dataGridViewDel.Columns[3].Width = 200;
                            dataGridViewDel.Columns[4].Width = 200;
                            dataGridViewDel.Columns[5].Width = 200;
                            dataGridViewDel.Columns[6].Width = 400;
                        }
                        break;
                    }
                case 2:
                    {
                        DataTable dt = bfBLL.getAllInfo();
                        dataGridViewChange.DataSource = dt;
                        if (dt != null)
                        {
                            dataGridViewChange.Columns[0].Width = 50;
                            dataGridViewChange.Columns[1].Width = 350;
                            dataGridViewChange.Columns[2].Width = 100;
                            dataGridViewChange.Columns[3].Width = 200;
                            dataGridViewChange.Columns[4].Width = 200;
                            dataGridViewChange.Columns[5].Width = 200;
                            dataGridViewChange.Columns[6].Width = 400;
                        }
                        break;
                    }
                case 3:
                    {
                        cbQCategory1.DataSource = category.category1;
                        break;
                    }
                case 4:
                    {
                        cbCountA1.DataSource = category.category1;
                        cbCountB1.DataSource = category.category1;
                        cbCountC1.DataSource = category.category1;
                        break;
                    }
            }
        }

        private void btnDel_Click(object sender, EventArgs e)
        {
            DialogResult RSS = MessageBox.Show(this, "确定要删除选中行数据码?", "提示", MessageBoxButtons.YesNo, MessageBoxIcon.Warning);
            switch (RSS)
            {
                case DialogResult.Yes:
                    for (int i = dataGridViewDel.SelectedRows.Count; i > 0; i--)
                    {
                        string strV1 = Convert.ToString(dataGridViewDel.SelectedRows[i - 1].Cells[0].Value);

                        dataGridViewDel.Rows.RemoveAt(dataGridViewDel.SelectedRows[i - 1].Index);
                        //使用获得的ID删除数据库的数据
                        int s = bfBLL.deleteBookInfo(strV1);  //cl是操作类的一个对像,Execute()是类中的一个方法
                        if (s != 0)
                        {
                            MessageBox.Show("成功删除选中行数据!");
                        }
                    }
                    break;
                case DialogResult.No:
                    break;
            }
        }

        private void btnQueryAll_Click(object sender, EventArgs e)
        {
            DataTable dt = bfBLL.getAllInfo();
            dataGridViewQuery.DataSource = dt;
            if (dt != null)
            {
                dataGridViewQuery.Columns[0].Width = 50;
                dataGridViewQuery.Columns[1].Width = 350;
                dataGridViewQuery.Columns[2].Width = 100;
                dataGridViewQuery.Columns[3].Width = 200;
                dataGridViewQuery.Columns[4].Width = 200;
                dataGridViewQuery.Columns[5].Width = 200;
                dataGridViewQuery.Columns[6].Width = 400;
            }
        }

        private void dataGridViewChange_CellMouseDown(object sender, DataGridViewCellMouseEventArgs e)
        {
            tbChange.Text = dataGridViewChange.SelectedCells[0].Value.ToString();
        }

        private void tbChange_TextChanged(object sender, EventArgs e)
        {
            dataGridViewChange.SelectedCells[0].Value = tbChange.Text;
        }

        private void btnChange_Click(object sender, EventArgs e)
        {
            for (int i = 0; i < dataGridViewChange.RowCount - 1; i++)
            {
                BookInfo updateInfo = new BookInfo();
                updateInfo.ID = Convert.ToInt32(dataGridViewChange.Rows[i].Cells[0].Value.ToString());
                updateInfo.name = dataGridViewChange.Rows[i].Cells[1].Value.ToString();
                updateInfo.count = Convert.ToInt32(dataGridViewChange.Rows[i].Cells[2].Value.ToString());
                updateInfo.category1 = dataGridViewChange.Rows[i].Cells[3].Value.ToString();
                updateInfo.category2 = dataGridViewChange.Rows[i].Cells[4].Value.ToString();
                updateInfo.category3 = dataGridViewChange.Rows[i].Cells[5].Value.ToString();
                updateInfo.addr = dataGridViewChange.Rows[i].Cells[6].Value.ToString();
                bfBLL.upadeBookInfo(updateInfo);
            }
            MessageBox.Show("修改完成!");
        }

        private void dataGridViewChange_CellLeave(object sender, DataGridViewCellEventArgs e)
        {
        }

        private void dataGridViewChange_CellClick(object sender, DataGridViewCellEventArgs e)
        {
            if (dataGridViewChange.Columns[dataGridViewChange.CurrentCell.ColumnIndex].HeaderText == "ID")
            {
                MessageBox.Show("ID不可以更改!");
                return;
            }

            tbChange.Text = dataGridViewChange.SelectedCells[0].Value.ToString();
        }

        private void cbQCategory1_SelectedIndexChanged(object sender, EventArgs e)
        {
            List<string> c2 = new List<string>();
            for (int i = 0; i < 3; i++)
            {
                c2.Add(category.category2[cbCategory1.SelectedIndex, i]);
            }
            cbQCategory2.DataSource = c2;
        }

        private void cbQCategory2_SelectedIndexChanged(object sender, EventArgs e)
        {
            List<string> c3 = new List<string>();
            for (int i = 0; i < 5; i++)
            {
                c3.Add(category.category3[cbCategory1.SelectedIndex, cbCategory2.SelectedIndex, i]);
            }
            cbQCategory3.DataSource = c3;
        }

        private void btnQuery_Click(object sender, EventArgs e)
        {
            if (tbQID.Text.Trim() != "" && tbQName.Text.Trim() != "" && cbQCategory1.Text.Trim() != "" && cbQCategory2.Text.Trim() != "" && cbQCategory3.Text.Trim() != "")
            {
                BookInfo qInfo = new BookInfo();
                qInfo.ID = Convert.ToInt32(tbQID.Text);
                qInfo.name = tbQName.Text.Trim();
                qInfo.category1 = cbQCategory1.Text.Trim();
                qInfo.category2 = cbQCategory2.Text.Trim();
                qInfo.category3 = cbQCategory3.Text.Trim();
                DataTable dt = bfBLL.queryInfo(qInfo);
                dataGridViewQuery.DataSource = dt;
                if (dt != null)
                {
                    dataGridViewQuery.Columns[0].Width = 50;
                    dataGridViewQuery.Columns[1].Width = 350;
                    dataGridViewQuery.Columns[2].Width = 100;
                    dataGridViewQuery.Columns[3].Width = 200;
                    dataGridViewQuery.Columns[4].Width = 200;
                    dataGridViewQuery.Columns[5].Width = 200;
                    dataGridViewQuery.Columns[6].Width = 400;
                    MessageBox.Show("查询完成!");
                }
            }
            else
            {
                MessageBox.Show("请填入所有查询条件!");
            }
        }

        private void tbQID_KeyPress(object sender, KeyPressEventArgs e)
        {
            if (e.KeyChar == 0x20) e.KeyChar = (char)0;  //禁止空格键  
            if ((e.KeyChar == 0x2D) && (((TextBox)sender).Text.Length == 0)) return;   //处理负数  
            if (e.KeyChar > 0x20)
            {
                try
                {
                    double.Parse(((TextBox)sender).Text + e.KeyChar.ToString());
                }
                catch
                {
                    e.KeyChar = (char)0;   //处理非法字符  
                }
            }
        }

        private void dataGridViewChange_CellEndEdit(object sender, DataGridViewCellEventArgs e)
        {
            tbChange.Text = dataGridViewChange.SelectedCells[0].Value.ToString();
        }

        private void cbCountB1_SelectedIndexChanged(object sender, EventArgs e)
        {
            List<string> c2 = new List<string>();
            for (int i = 0; i < 3; i++)
            {
                c2.Add(category.category2[cbCategory1.SelectedIndex, i]);
            }
            cbCountB2.DataSource = c2;
        }

        private void cbCountC1_SelectedIndexChanged(object sender, EventArgs e)
        {
            List<string> c2 = new List<string>();
            for (int i = 0; i < 3; i++)
            {
                c2.Add(category.category2[cbCategory1.SelectedIndex, i]);
            }
            cbCountC2.DataSource = c2;
        }

        private void cbCountC2_SelectedIndexChanged(object sender, EventArgs e)
        {
            List<string> c3 = new List<string>();
            for (int i = 0; i < 5; i++)
            {
                c3.Add(category.category3[cbCategory1.SelectedIndex, cbCategory2.SelectedIndex, i]);
            }
            cbCountC3.DataSource = c3;
        }

        private void btnTotal_Click(object sender, EventArgs e)
        {
            if (cbCountA1.Text.Trim() != "" && cbCountB1.Text.Trim() != "" && cbCountC1.Text.Trim() != "" && cbCountB2.Text.Trim() != "" && cbCountC2.Text.Trim() != "" && cbCountC3.Text.Trim() != "")
            {
                lbTotal1.Text = "总数:" + bfBLL.getTotal1(cbCountA1.Text).ToString();
                lbTotal2.Text = "总数:" + bfBLL.getTotal2(cbCountB1.Text, cbCountB2.Text).ToString();
                lbTotal3.Text = "总数:" + bfBLL.getTotal3(cbCountC1.Text, cbCountC2.Text, cbCountC3.Text).ToString();
                MessageBox.Show("统计完成!");
            }
            else
            {
                MessageBox.Show("请填入正确的类别!");
            }
        }
    }

}

下面是程序的运行效果图
C#.net开发基于WinForm的简单图书馆系统(附源码地址)_第2张图片

C#.net开发基于WinForm的简单图书馆系统(附源码地址)_第3张图片
C#.net开发基于WinForm的简单图书馆系统(附源码地址)_第4张图片
C#.net开发基于WinForm的简单图书馆系统(附源码地址)_第5张图片
C#.net开发基于WinForm的简单图书馆系统(附源码地址)_第6张图片

你可能感兴趣的:(开源分享,c#)