C#excel导入dategridview并保存到数据库/dategridview增加一行或几行一键保存数据库

excel导入到dategridview显示并保存到数据库

dategridview增加一行或几行一键保存数据库

ExcelHelper类(这个要导入NPOI包)

using NPOI.HSSF.UserModel;
using NPOI.SS.UserModel;
using NPOI.XSSF.UserModel;
using System;
using System.Collections.Generic;
using System.Data;
using System.IO;namespace WindowsFormsApp1
{/// <summary>/// 操作Excel通用类/// </summary>public class ExcelHelper{/// <summary>/// 从Excel读取数据，只支持单表/// </summary>/// <param name="FilePath">文件路径</param>public static DataTable ReadFromExcel(string FilePath){IWorkbook wk = null;string extension = System.IO.Path.GetExtension(FilePath); //获取扩展名try{using (FileStream fs = File.OpenRead(FilePath)){if (extension.Equals(".xls")) //2003{wk = new HSSFWorkbook(fs);}else                         //2007以上{wk = new XSSFWorkbook(fs);}}//读取当前表数据ISheet sheet = wk.GetSheetAt(0);//构建DataTableIRow row = sheet.GetRow(0);DataTable result = BuildDataTable(row);if (result != null){if (sheet.LastRowNum >= 1){for (int i = 1; i < sheet.LastRowNum + 1; i++){IRow temp_row = sheet.GetRow(i);if (temp_row == null) { continue; }//2019-01-14 修复 行为空时会出错List<object> itemArray = new List<object>();for (int j = 0; j < result.Columns.Count; j++)//解决Excel超出DataTable列问题    lqwvje20181027{//itemArray.Add(temp_row.GetCell(j) == null ? string.Empty : temp_row.GetCell(j).ToString());itemArray.Add(GetValueType(temp_row.GetCell(j)));//解决 导入Excel  时间格式问题  lqwvje 20180904}result.Rows.Add(itemArray.ToArray());}}}return result;}catch (Exception ex){return null;}}/// <summary>/// 从Excel读取数据，支持多表/// </summary>/// <param name="FilePath">文件路径</param>public static DataSet ReadFromExcels(string FilePath){DataSet ds = new DataSet();IWorkbook wk = null;string extension = System.IO.Path.GetExtension(FilePath); //获取扩展名try{using (FileStream fs = File.OpenRead(FilePath)){if (extension.Equals(".xls")) //2003{wk = new HSSFWorkbook(fs);}else                         //2007以上{wk = new XSSFWorkbook(fs);}}int SheetCount = wk.NumberOfSheets;//获取表的数量if (SheetCount < 1){return ds;}for (int s = 0; s < SheetCount; s++){//读取当前表数据ISheet sheet = wk.GetSheetAt(s);//构建DataTableIRow row = sheet.GetRow(0);if (row == null) { continue; }DataTable tempDT = BuildDataTable(row);tempDT.TableName = wk.GetSheetName(s);if (tempDT != null){if (sheet.LastRowNum >= 1){for (int i = 1; i < sheet.LastRowNum + 1; i++){IRow temp_row = sheet.GetRow(i);if (temp_row == null) { continue; }//2019-01-14 修复 行为空时会出错List<object> itemArray = new List<object>();for (int j = 0; j < tempDT.Columns.Count; j++)//解决Excel超出DataTable列问题    lqwvje20181027{itemArray.Add(GetValueType(temp_row.GetCell(j)));//解决 导入Excel  时间格式问题  lqwvje 20180904}tempDT.Rows.Add(itemArray.ToArray());}}ds.Tables.Add(tempDT);}}return ds;}catch (Exception ex){return null;}}/// <summary>/// 将DataTable数据导入到excel中/// </summary>/// <param name="data">要导入的数据</param>/// <param name="isColumnWritten">DataTable的列名是否要导入</param>/// <param name="sheetName">要导入的excel的sheet的名称</param>/// <param name="fileName">导出的文件途径</param>/// <returns>导入数据行数(包含列名那一行)</returns>public static int DataTableToExcel(DataTable data, string sheetName, string fileName, bool isColumnWritten = true){IWorkbook workbook = null;using (FileStream fs = new FileStream(fileName, FileMode.OpenOrCreate, FileAccess.ReadWrite)){if (fileName.IndexOf(".xlsx") > 0) // 2007版本{workbook = new XSSFWorkbook();}else if (fileName.IndexOf(".xls") > 0) // 2003版本{workbook = new HSSFWorkbook();}if (workbook == null) { return -1; }try{ISheet sheet = workbook.CreateSheet(sheetName);int count = 0;if (isColumnWritten) //写入DataTable的列名{IRow row = sheet.CreateRow(0);for (int j = 0; j < data.Columns.Count; ++j){row.CreateCell(j).SetCellValue(data.Columns[j].ColumnName);}count = 1;}for (int i = 0; i < data.Rows.Count; ++i){IRow row = sheet.CreateRow(count);for (int j = 0; j < data.Columns.Count; ++j){row.CreateCell(j).SetCellValue(data.Rows[i][j].ToString());}count++;}workbook.Write(fs); //写入到excelreturn count;}catch (Exception ex){Console.WriteLine("Exception: " + ex.Message);return -1;}}}/// <summary>/// 将DataSet数据导入到excel中   每个datatable一个sheet,sheet名为datatable名/// </summary>/// <param name="ds">要导入的数据</param>/// <param name="isColumnWritten">DataTable的列名是否要导入</param>/// <param name="fileName">导出的文件途径</param>public static bool DataTableToExcel(DataSet ds, string fileName, bool isColumnWritten = true){if (ds == null || ds.Tables.Count < 1){return false;}IWorkbook workbook = null;using (FileStream fs = new FileStream(fileName, FileMode.OpenOrCreate, FileAccess.ReadWrite)){if (fileName.IndexOf(".xlsx") > 0) // 2007版本{workbook = new XSSFWorkbook();}else if (fileName.IndexOf(".xls") > 0) // 2003版本{workbook = new HSSFWorkbook();}if (workbook == null) { return false; }try{foreach (DataTable dt in ds.Tables){ISheet sheet = workbook.CreateSheet(dt.TableName);if (isColumnWritten) //写入DataTable的列名{IRow row = sheet.CreateRow(0);for (int j = 0; j < dt.Columns.Count; ++j){row.CreateCell(j).SetCellValue(dt.Columns[j].ColumnName);}}for (int i = 0; i < dt.Rows.Count; ++i){IRow row = sheet.CreateRow(isColumnWritten ? i + 1 : i);for (int j = 0; j < dt.Columns.Count; ++j){row.CreateCell(j).SetCellValue(dt.Rows[i][j].ToString());}}}workbook.Write(fs); //写入到excel}catch (Exception ex){Console.WriteLine("Exception: " + ex.Message);return false;}}return true;}private static DataTable BuildDataTable(IRow Row){DataTable result = null;if (Row.Cells.Count > 0){result = new DataTable();for (int i = 0; i < Row.LastCellNum; i++){if (Row.GetCell(i) != null){result.Columns.Add(Row.GetCell(i).ToString());}}}return result;}/// <summary>/// 获取单元格类型/// </summary>/// <param name="cell"></param>/// <returns></returns>private static object GetValueType(ICell cell){if (cell == null)return null;switch (cell.CellType){case CellType.Blank: //BLANK:  return null;case CellType.Boolean: //BOOLEAN:  return cell.BooleanCellValue;case CellType.Numeric: //NUMERIC:  if (DateUtil.IsCellDateFormatted(cell)){return cell.DateCellValue;}return cell.NumericCellValue;case CellType.String: //STRING:  return cell.StringCellValue;case CellType.Error: //ERROR:  return cell.ErrorCellValue;case CellType.Formula: //FORMULA:  cell.SetCellType(CellType.String);return cell.StringCellValue;default:return "=" + cell.CellFormula;}}}
}

Form1

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.OleDb;
using System.Data.SqlClient;namespace 增添excel测试
{public partial class Form1 : Form{public Form1(){InitializeComponent();}DataTable dt = new DataTable();string connString = @"Data Source=; Database = 测试; Integrated Security=true";SqlConnection conn;private void bind(string fileName){string strConn = "Provider=Microsoft.Jet.OLEDB.4.0;" +"Data Source=" + fileName + ";" +"Extended Properties='Excel 8.0; HDR=Yes; IMEX=1'";OleDbDataAdapter da = new OleDbDataAdapter("SELECT *  FROM [Sheet1$]", strConn);DataSet ds = new DataSet();try{da.Fill(ds);dt = ds.Tables[0];this.dataGridView1.DataSource = dt;}catch (Exception err){MessageBox.Show("操作失败！" + err.ToString());}}private void insertToSql(DataRow dr){//excel表中的列名和数据库中的列名一定要对应  string name = dr["L1"].ToString();string sex = dr["L2"].ToString();string no = dr["L3"].ToString();//string major = dr["无量纲承载力F"].ToString();string sql = "insert into [Sheet1$] values('" + name + "','" + sex + "','" + no + "')";this.textBox1.Text += "HHH"+sql;SqlCommand cmd = new SqlCommand(sql, conn);cmd.ExecuteNonQuery();}//导入excel到dategridviewprivate void button1_Click_1(object sender, EventArgs e){OpenFileDialog openFile = new OpenFileDialog();if (openFile.ShowDialog() == DialogResult.OK){string filePath = openFile.FileName;DataTable excelDt = WindowsFormsApp1.ExcelHelper.ReadFromExcel(filePath);//把Excel读取到DataTable里面 然后再把DataTable存入数据库dataGridView1.DataSource = excelDt;}}//将Datagridview1的记录插入到数据库private void button2_Click(object sender, EventArgs e){conn = new SqlConnection(connString);conn.Open();DataTable dtt = (DataTable)dataGridView1.DataSource;textBox1.Text = "SD:" + dtt.Rows.Count;if (dataGridView1.Rows.Count > 0){DataRow dr = null;for (int i = 0; i < dtt.Rows.Count; i++){dr = dtt.Rows[i];insertToSql(dr);}conn.Close();MessageBox.Show("导入成功！");}else{MessageBox.Show("没有数据！");}}//加入private void button3_Click(object sender, EventArgs e){this.Hide();Form2 form2 = new Form2();form2.Show();}}
}

Form2

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 增添excel测试
{public partial class Form2 : Form{public Form2(){InitializeComponent();}DataTable dt = new DataTable();string connString = @"Data Source=; Database = 测试; Integrated Security=true";SqlConnection conn;private void insertToSql(DataRow dr){//excel表中的列名和数据库中的列名一定要对应  string name = dr[0].ToString();string sex = dr[1].ToString();string no = dr[2].ToString();//string major = dr["无量纲承载力F"].ToString();string sql = "insert into [Sheet1$] values('" + name + "','" + sex + "','" + no + "')";this.textBox1.Text += "HHH" + sql;SqlCommand cmd = new SqlCommand(sql, conn);cmd.ExecuteNonQuery();}//未绑定数据源dategridview转datatableprivate static DataTable GetDgvToTable(DataGridView dgv){DataTable dt = new DataTable();// 列强制转换for (int count = 0; count < dgv.Columns.Count; count++){System.Data.DataColumn dc = new System.Data.DataColumn(dgv.Columns[count].Name.ToString());dt.Columns.Add(dc);}// 循环行for (int count = 0; count < dgv.Rows.Count; count++){DataRow dr = dt.NewRow();for (int countsub = 0; countsub < dgv.Columns.Count; countsub++){dr[countsub] = Convert.ToString(dgv.Rows[count].Cells[countsub].Value);}dt.Rows.Add(dr);}return dt;}private void button1_Click(object sender, EventArgs e){dataGridView1.Rows.Add();}//保存private void button2_Click(object sender, EventArgs e){conn = new SqlConnection(connString);conn.Open();textBox1.Text = "SD:" + dataGridView1.Rows[0].Cells[0].Value.ToString();DataTable dtt = GetDgvToTable(dataGridView1);textBox1.Text = "SD:" + dtt.Rows.Count;if (dataGridView1.Rows.Count > 0){DataRow dr = null;for (int i = 0; i < dtt.Rows.Count; i++){dr = dtt.Rows[i];//textBox1.Text+= "HH:" + dr["L1"].ToString();insertToSql(dr);}conn.Close();MessageBox.Show("导入成功！");}else{MessageBox.Show("没有数据！");}}}
}