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DataTable
IRow 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DataTable
IRow 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excel
return 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dategridview
private 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datatable
private 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！");
}
}
}
}
成品演示
C#excel导入dategridview