关于C#导入excel到sql server的问题

[qq_35195625]

上星期做的C#导入excel到sql server解决了重复导入信息的问题，加多一个ID列，但是发现导入了第一个excel文件的数据之后第二个导入不了了。求大神指点或解决。
我的winform里只有三个控件：两个botton和一个dataGridView1

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;
using System.Text.RegularExpressions;
using KQ;
using SZCID.Environment;
using SZCID.Environment.Tools; 

namespace WindowsFormsApplication59
{
    public partial class Form1 : Form
    {
        string file = null;
        public Form1()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            OpenFileDialog fileDialog = new OpenFileDialog();
            fileDialog.Multiselect = true;
            fileDialog.Title = "请选择文件";
            fileDialog.Filter = "所有文件(*.*)|*.*";
            string fileName = fileDialog.SafeFileName;//获取文件名

            if (fileDialog.ShowDialog() == DialogResult.OK)
            {
                file = fileDialog.FileName;

                try
                {
                    using (Excel excelHelper = new Excel(file))
                    {
                        DataTable dt = excelHelper.ExcelToDataTable(fileName, true);
                        dataGridView1.DataSource = dt;
                    }
                }
                catch (Exception ex)
                {
                    Console.WriteLine("Exception: " + ex.Message);
                }
            }
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            

        }

        private void button2_Click(object sender, EventArgs e)
        {
            DataTable dt = new DataTable();
            string connstring = "server=.;database=shoucao;uid=zxf; pwd=zxf123";
            SqlConnection conn = new SqlConnection(connstring);
            conn.Open();
            //DataRow dr = null;
            if (this.dataGridView1.DataSource != null)
            {
                int allrow = this.dataGridView1.Rows.Count;//总行数
                string zdbh = null;
                string jyrqsj = null;
                string zzh = null;
                string fkh = null;
                string jyje = null;
                string shfy = null;
                string jsje = null;
                string xtckh = null;
                string xtgzh = null;
                string jyqd = null;
                string jyle = null;
                int id = 0;
                //int A = 0;
                try
                {
                        for (int i = 0; i < dataGridView1.Rows.Count; i++)
                        {
                            zdbh = this.dataGridView1.Rows[i].Cells[0].Value.ToString();
                            jyrqsj = this.dataGridView1.Rows[i].Cells[1].Value.ToString();
                            zzh = this.dataGridView1.Rows[i].Cells[2].Value.ToString();
                            fkh = this.dataGridView1.Rows[i].Cells[3].Value.ToString();
                            jyje = this.dataGridView1.Rows[i].Cells[4].Value.ToString();
                            shfy = this.dataGridView1.Rows[i].Cells[5].Value.ToString();
                            jsje = this.dataGridView1.Rows[i].Cells[6].Value.ToString();
                            xtckh = this.dataGridView1.Rows[i].Cells[7].Value.ToString();
                            xtgzh = this.dataGridView1.Rows[i].Cells[8].Value.ToString();
                            jyqd = this.dataGridView1.Rows[i].Cells[9].Value.ToString();
                            jyle = this.dataGridView1.Rows[i].Cells[10].Value.ToString();
                            ++id;
                            string sqlInsert = "insert into dataGridView values('" + id + "','" + zdbh + "','" + jyrqsj + "','" + zzh + "','" + fkh + "','" + jyje + "','" + shfy + "','" + jsje + "','" + xtckh + "','" + xtgzh + "','" + jyqd + "','" + jyle + "')";
                            SqlCommand cmd = new SqlCommand(sqlInsert, conn);
                            cmd.ExecuteNonQuery(); 
                        }
                          
                }

                catch (Exception )
                {

                    //MessageBox.Show("Exception: " + ex.Message);

                }
            }
            if (dataGridView1.Rows.Count > 0)  //把数据库表中的数据显示到表中，可判断有没有数据  
            {
                MessageBox.Show("导入成功！");
            }
            else
            {
                MessageBox.Show("没有数据！");
            }
        }

        private void dataGridView1_CellContentClick(object sender, DataGridViewCellEventArgs e)
        {

        }
    }
}

Excel.cs
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.IO;
using System.Data;
using System.Text.RegularExpressions;
using NPOI.SS.UserModel;
using NPOI.XSSF.UserModel;
using NPOI.HSSF.UserModel;

namespace KQ
{
    class Excel : IDisposable
    {
        private string fileName = null;
        private IWorkbook workbook = null;
        private FileStream fs = null;
        private bool disposed;

        public Excel(string fileName)
        {
            this.fileName = fileName;
            disposed = false;
        }
        /// <summary>
        /// 将excel中的数据导入到DataTable中
        /// </summary>
        /// <param name="sheetName">excel工作薄sheet的名称</param>
        /// <param name="isFirstRowColumn">第一行是否是DataTable的列名</param>
        /// <returns>返回的DataTable</returns>
        public DataTable ExcelToDataTable(string sheetName, bool isFirstRowColumn)
        {
            ISheet sheet = null;
            DataTable data = new DataTable();
            int startRow = 0;
            try
            {
                fs = new FileStream(fileName, FileMode.Open, FileAccess.Read);
                if (fileName.IndexOf(".xlsx") > 0) // 2007版本
                    workbook = new XSSFWorkbook(fs);
                else if (fileName.IndexOf(".xls") > 0) // 2003版本
                    workbook = new HSSFWorkbook(fs);
                if (sheetName != null)
                {
                    sheet = workbook.GetSheet(sheetName);
                    if (sheet == null)
                    {
                        sheet = workbook.GetSheetAt(0);//如果没有找到指定的sheetName对应的sheet，则尝试获取第一个sheet
                    }
                }
                else
                {
                    sheet = workbook.GetSheetAt(0);
                }
                //获取并显示设置 列
                if (sheet != null)
                {
                    //获取第一行，并设置为列
                    IRow firstRow = sheet.GetRow(0);
                    int cellCount = firstRow.LastCellNum;//一行最后一个cell的编号 即总的列数
                    if (isFirstRowColumn)
                    {
                        for (int i = firstRow.FirstCellNum; i < cellCount; ++i)
                        {
                          ICell cell = firstRow.GetCell(i);
                            if (cell != null)
                            {
                                string cellValue = cell.StringCellValue;
                                if (cellValue != null)
                                {
                                    string[] s = Regex.Replace(cellValue.Trim(), "\\s+", " ").Split(' ');//将多余的空格转成一个空格，然后变成数组
                                    for (int a = 0; a < s.Length; a++)
                                    {
                                        if (s[a].ToString() != null && s[a].ToString().Length != 0)
                                        {
                                            DataColumn column = new DataColumn(s[a]);
                                            data.Columns.Add(column);//赋值到当前行的每一列，直接给dataTable
                                        }
                                    }
                                }
                            }
                        }
                        startRow = sheet.FirstRowNum + 1;
                    }
                    else
                    {
                        startRow = sheet.FirstRowNum;
                    }
                    //最后一列的标号
                    //获取每一行的 数据
                    int rowCount = sheet.LastRowNum;
                    for (int i = startRow; i <= rowCount; ++i)
                    {
                        IRow row = sheet.GetRow(i);
                        if (row == null) continue; //没有数据的行默认是null　　　　　　　
                        DataRow dataRow = data.NewRow();
                        for (int j = row.FirstCellNum; j < cellCount; ++j)
                        {
                            if (row.GetCell(j) != null) //同理，没有数据的单元格都默认是null
                            {
                                //循环列读取
                                string[] s = Regex.Replace(row.GetCell(j).StringCellValue, "\\s+", " ").Split(' ');
                                for (int a = 0; a < s.Length; a++)
                                {
                                    if (s[a].ToString() != null && s[a].ToString().Length != 0)
                                    {
                                        DataColumn column = new DataColumn(s[a]);
                                        //将当前行的数据 赋给dataRow，然后将dataRow给dataTable
                                        dataRow[a] = column.ToString();
                                    }
                                }
                            }
                        }
                        data.Rows.Add(dataRow);
                    }
                }
                return data;
            }
            catch (Exception ex)
            {
                Console.WriteLine("Exception: " + ex.Message);
                return null;
            }
        }
        public void Dispose()
        {
            throw new Exception("The method or operation is not implemented.");
        }
    }
}

[qq_35195625]

大神都到哪里去了

[qq_35195625]

把excel文件读取到C#winform的dataGridView控件里面时候怎么选择只到入自己想要的数据？

[南天空]

连接打开后关闭了吗？关闭了重新打开看看。

[大鱼>]

引用 3 楼 qq_35195625 的回复:

把excel文件读取到C#winform的dataGridView控件里面时候怎么选择只到入自己想要的数据？

你干嘛只要导入想要的数据到DataGridView呢？你的目的是导入到数据库，你可以先把所有的数据导入到DataGridView，然后在DataGridView选中你想导入数据库的数据也行啊？

[虚云]

不用加载到DataGridView里，几行代码就可以读取Excel文件，并且不需要第三方组件 DataTable dtResuilt = new DataTable(); string TableName = GetTableName(strExcelFilePath, TableIndex); string strConn = "Provider=Microsoft.Jet.OLEDB.4.0; Data Source=" + strExcelFilePath.Trim() + "; Extended Properties=\"Excel 8.0;IMEX=1\""; using (OleDbDataAdapter cmd = new OleDbDataAdapter("SELECT * FROM [" + TableName + "]", strConn)) { cmd.Fill(dtResuilt); return dtResuilt; } 通过上面代码读取到DataTable里，然后循环Row就行了。

[qq_35195625]

把ID列删除了也能导入，但是就是可能重复导入，求大神教