C#读取Excel和txt文件数据并把数据分别一次性添加到Mysql数据库

秒速五厘米 2022-08-08 12:46 2阅读 0赞

C\#简单文件读写和简单操作数据库

## 1.连接Mysql数据库和简单操作数据库类 ##

using System;
    using System.Collections.Generic;
    using System.Linq;
    using System.Text;
    using System.Threading.Tasks;
    using MySql.Data.MySqlClient;
    using System.Data;
    
    namespace mysqlToFile
    {
        class Connector
        {
            /// <summary>
            ///  建立MySql数据库连接.
            /// </summary>
            /// <returns>返回MySqlConnection对象</returns>
            public MySqlConnection getmysqlcon()
            {
                string M_str_sqlcon = "server=127.0.0.1;user=root;"+
                    "database=tt;port=3306;password=;"; //根据自己的设置
                MySqlConnection myCon = new MySqlConnection(M_str_sqlcon);
                return myCon;
            }
    
            //  执行MySqlCommand命令
            /// <summary>
            /// 执行MySqlCommand命令
            /// </summary>
            /// <param name="M_str_sqlstr">SQL语句</param>
            public void getmysqlcom(string M_str_sqlstr)
            {
                MySqlConnection mysqlcon = this.getmysqlcon();
                mysqlcon.Open();
                MySqlCommand commn = new MySqlCommand("set names utf-8", mysqlcon);
                MySqlCommand mysqlcom = new MySqlCommand(M_str_sqlstr, mysqlcon);
                mysqlcom.ExecuteNonQuery();
                mysqlcom.Dispose();
                mysqlcon.Close();
                mysqlcon.Dispose();
            }
    
            /// <summary>
            /// 创建一个MySqlDataReader对象,以便用于控制台输出表的内容
            /// </summary>
            /// <param name="M_str_sqlstr">SQL语句</param>
            /// <returns>返回MySqlDataReader对象</returns>
            public MySqlDataReader getmysqlread(string M_str_sqlstr)
            {
                MySqlConnection mysqlcon = this.getmysqlcon();
                MySqlCommand mysqlcom = new MySqlCommand(M_str_sqlstr, mysqlcon);
                mysqlcon.Open();
                MySqlDataReader mysqlread = mysqlcom.ExecuteReader(CommandBehavior.CloseConnection);
                return mysqlread;
            }
    
            /// <summary>
            /// 创建一个DataTable对象,以便用于控制台及dataGridView控件输出表的内容
            /// </summary>
            /// <param name="M_str_sqlstr">SQL语句</param>
            /// <returns>返回MySqlDataReader对象</returns>
            public DataTable getsqlread(string M_str_sqlstr)
            {
                MySqlConnection mysqlcon = this.getmysqlcon();
                mysqlcon.Open();
                MySqlCommand commn = new MySqlCommand("set names utf-8", mysqlcon);
                MySqlDataAdapter mda = new MySqlDataAdapter(M_str_sqlstr, mysqlcon);
                DataTable dt = new DataTable();
                mda.Fill(dt);
                return dt;
            }
    
            
        }
    }

## 2.读写文件内容及批量写入数据库中 ##

using MySql.Data.MySqlClient;
    using System;
    using System.Collections.Generic;
    using System.ComponentModel;
    using System.Data;
    using System.Data.OleDb;
    using System.Drawing;
    using System.IO;
    using System.Linq;
    using System.Text;
    using System.Threading.Tasks;
    using System.Windows.Forms;
    
    namespace mysqlToFile
    {
        public partial class MainOpereteForm : Form
        {
            public MainOpereteForm()
            {
                InitializeComponent();
            }
    
            Connector connector = new Connector();
    
            /// <summary>
            ///  读取excel文件内容并存放在DataSet中.
            /// </summary>
            /// <returns>返回DataSet对象</returns>
            public DataSet ExcelToDS(string path)
            {
                string strConn = "Provider=Microsoft.Jet.OLEDB.4.0;"
                    + "Data Source=" + @path + ";" + "Extended Properties=Excel 8.0;";
                OleDbConnection conn = new OleDbConnection(strConn);
                conn.Open();
                string strExcel = "";
                OleDbDataAdapter myCommand = null;
                DataSet ds = null;
                strExcel = "select * from [sheet1$]";
                myCommand = new OleDbDataAdapter(strExcel, strConn);
                DataTable table1 = new DataTable();
                ds = new DataSet();
                myCommand.Fill(table1);
                myCommand.Fill(ds);
                return ds;
            }
    
            private void btnInsertXls_Click(object sender, EventArgs e)
            {
                InsertXls();
            }
    
            /// <summary>
            ///  读取List_Class1_Submit.xls文件的内容并一次性把内容插入到Mysql数据库tt的students表中.
            /// </summary>
            private void InsertXls()
            {
                // 调用文件对话框，选择需要文件
                OpenFileDialog openfile = new OpenFileDialog();
                openfile.Filter = "工作薄(*.xls)|*.xls|所有文件(*.*)|*.*|工作薄(*.xlsx)|*.xlsx";
                if (openfile.FilterIndex == 1 && openfile.ShowDialog() == DialogResult.OK)
                {
                    DataSet dataSet = ExcelToDS(openfile.FileName);
                    String sqlSearch = "select * from students";
                    int count = 0;
                    string[] str = new string[4];
                    string sql;
                    foreach (DataTable table in dataSet.Tables)
                    {
                        foreach (DataRow row in table.Rows)
                        {
                            count = 0;
                            for (int i = 0; i < 4; i++)
                            {
                                str[i] = "*";
                            }
                            foreach (DataColumn column in table.Columns)
                            {
                                if (row[column] != null)
                                    str[count] = row[column].ToString();
                                count++;
                            }
                            sql = string.Format("insert into students values('{0}','{1}','{2}','{3}')",
                                str[0], str[1], str[2], str[3]);
                            if (!str[0].Equals("*"))
                            {
                                connector.getmysqlcom(sql);
                            }
                        }
                    }
                    Reflash(sqlSearch);
                }
            }
    
            private void btnInsertTxt_Click(object sender, EventArgs e)
            {
                InsertTxt();
    
            }
    
            /// <summary>
            ///  读取List_Class1.txt文件的内容并一次性把内容插入到Mysql数据库tt的studentss表中.
            /// </summary>
            private void InsertTxt()
            {
                OpenFileDialog openfile = new OpenFileDialog();
                openfile.Filter = "文本文件(*.txt)|*.txt|所有文件(*.*)|*.*|word文档(*.doc)|*.doc";
                if (openfile.FilterIndex == 1 && openfile.ShowDialog() == DialogResult.OK)
                {
                    String sqlSearch = "select * from studentss";
                    string[] str = new string[5];
                    string sql;
                    using (StreamReader sr = new StreamReader(openfile.FileName, Encoding.Default, false))
                    {
                        string line;
                        while ((line = sr.ReadLine()) != null)
                        {
                            line.Trim();
                            str = line.Split(new char[] { ' ' });
                            sql = string.Format("insert into studentss values('{0}','{1}','{2}','{3}','{4}')",
                                    str[0], str[1], str[2], str[3], str[4]);
                            connector.getmysqlcom(sql);
                        }
                    }
                    Reflash(sqlSearch);
                }
            }
    
            private void selectBtn_Click(object sender, EventArgs e)
            {
                String sqlSearch = "select studentss.stuName as 未提交作业网址学生 from studentss "+
                    "where studentss.stuNo not in (select students.stuNo from students)";
                Reflash(sqlSearch);
            }
    
            /// <summary>
            ///  读取Grade_FirstExercise.xls文件的内容并一次性把内容插入到Mysql数据库tt的grades表中.
            /// </summary>
            private void btnInsertGrade_Click(object sender, EventArgs e)
            {
                OpenFileDialog openfile = new OpenFileDialog();
                openfile.Filter = "工作薄(*.xls)|*.xls|所有文件(*.*)|*.*|工作薄(*.xlsx)|*.xlsx";
                if (openfile.FilterIndex == 1 && openfile.ShowDialog() == DialogResult.OK)
                {
                    DataSet dataSet = ExcelToDS(openfile.FileName);
                    String sqlSearch = "select * from grades";
                    int count = 0;
                    double grade = 0;
                    string[] str = new string[3];
                    string sql;
                        foreach (DataTable table in dataSet.Tables)
                        {
                            foreach (DataRow row in table.Rows)
                            {
                                for (int i = 0; i < 3; i++)
                                {
                                    str[i] = "*";
                                }
                                foreach (DataColumn column in table.Columns)
                                {
                                    if (column.ColumnName == "学号")
                                    {
                                        str[0] = row[column].ToString();
                                    }
                                    if (column.ColumnName == "互评学生姓名")
                                    {
                                        str[1] = row[column].ToString();
                                     
                                    }
                                    count = 1;
                                    if (column.ColumnName == "互评学生分数")
                                    {
                                        str[2] = row[column].ToString();
                                        grade = Convert.ToDouble(str[2]);
                                    }
                                }
                                sql = string.Format("insert into grades values('{0}','{1}',{2},{3})",
                                    str[0], str[1], count, grade);
                                if (!str[0].Equals("*") && !str[2].Equals("*"))
                                {
                                    connector.getmysqlcom(sql);
                                }
                            }
                        }
                        
                    }
                }