• C# 多个CSV文件合并成一个文件


    using System;
    using System.Collections.Generic;
    using System.ComponentModel;
    using System.Data;
    using System.Drawing;
    using System.Text;
    using System.Windows.Forms;
    using System.IO;

    namespace WindowsFormsApplication1
    {
        public partial class Form1 : Form
        {
            string FileName = string.Empty;
            DataTable dtExcelData;
            public Form1()
            {
                InitializeComponent();
            }

            private void bthChose_Click(object sender, EventArgs e)
            {
                OpenFileDialog opd = new OpenFileDialog();//实例化选择打开窗口对象
                opd.Multiselect = false;//定义不允许多选
                opd.Filter = "(*.*)|*.csv";//设置可以选择所有文件
                if (opd.ShowDialog() == DialogResult.OK)
                {
                    //写入自己的代码
                    txtFileName.Text = opd.FileName;
                    FileName = opd.FileName;

                }
                opd.Dispose();
            }

            private void button1_Click(object sender, EventArgs e)
            {
                string path = "";
                string fname = "";
                if (FileName.Length <= 0)
                {
                    MessageBox.Show("请上传文件");
                    return;
                }

                else if (System.IO.Path.GetExtension(FileName) != ".csv")
                {
                    MessageBox.Show("请上传csv格式文件");
                    return;
                }
                else
                {
                    path = FileName.Substring(0, FileName.LastIndexOf("\\") + 1);
                  //  fname = FileName.Substring(FileName.LastIndexOf("\\") + 1);    
                }
                GetDate(path);
            }


            public void GetDate(string path)
            {
                try
                {
                    DataGridView dgv = new DataGridView();

                    dgv.RowHeadersVisible = true;
                    dgv.Columns.Clear();
                    dgv.Columns.Add("Sort", "Sort");
                    dgv.Columns.Add("TN", "TN");
                    dgv.Columns.Add("FileName", "FileName");
                    string[] FileNameList = Directory.GetFiles(path);
                    Array.Sort(FileNameList,new TSort() );
                  
                 
                    int i = 0;
                    foreach (String filePath in FileNameList)
                    {
                        i++;
                    
                        string fname = filePath.Substring(FileName.LastIndexOf("\\") + 1);   
                        StreamReader sr = new StreamReader(filePath);
                        while (true)
                        {
                            String strData = sr.ReadLine();
                            if (!String.IsNullOrEmpty(strData))
                            {
                                String[] strValue = strData.Split(',');
                                int index = dgv.Rows.Add();
                                DataGridViewRow dr = dgv.Rows[index];
                                dr.Cells[0].Value = i.ToString();
                                dr.Cells[1].Value = strValue[0];
                                dr.Cells[2].Value = fname;
                            }
                            else
                            {
                                break;
                            }
                        }
                    }
                    if (dgv.Rows.Count > 0)
                    {
                       

                        ExcelHelper eh = new ExcelHelper();
                        eh.OutToExcelFromDataGridView("TNT", dgv, false);

                    }
                } catch (Exception ex)
                {
                    MessageBox.Show("抱歉出错了!"+ex.Message);
                }

            }

        }
    }

    using System;
    using System.Collections.Generic;
    using System.Text;

    namespace WindowsFormsApplication1
    {
        public class TSort : System.Collections.IComparer
        {
            public int Compare(object x, object y)
            {
                string s1 = (string)x;
                string s2 = (string)y;
                if (s1.Length > s2.Length) return 1;
                if (s1.Length < s2.Length) return -1;
                for (int i = 0; i < s1.Length; i++)
                {
                    if (s1[i] > s2[i]) return 1;
                    if (s1[i] < s2[i]) return -1;
                }
                return 0;
            }
        } 

    }

    using System;
    using System.IO;
    using System.Data;
    using System.Collections;
    using System.Data.OleDb;
    using System.Web;
    using System.Windows.Forms;
    using System.Text;

    using Microsoft.Office.Interop.Excel;


    /// <summary>
    /// Excel操作类
    /// </summary>
    /// Microsoft Excel 11.0 Object Library
    public  class ExcelHelper
    {


        public  bool OutToExcelFromDataGridView(string title, DataGridView dgv, bool isShowExcel)
        {
            int titleColumnSpan = 0;//标题的跨列数
            string fileName = "tnt";//保存的excel文件名
            int columnIndex = 1;//列索引
            if (dgv.Rows.Count == 0)
                return false;
            /*保存对话框*/
            //SaveFileDialog sfd = new SaveFileDialog();
            //sfd.Filter = "导出Excel(*.xls)|*.xls";
            //sfd.FileName = title + DateTime.Now.ToString("yyyyMMddhhmmss");

            //if (sfd.ShowDialog() == DialogResult.OK)
            //{
            //    fileName = sfd.FileName;
                /*建立Excel对象*/
                Microsoft.Office.Interop.Excel.Application excel = new Microsoft.Office.Interop.Excel.Application();
                if (excel == null)
                {
                    MessageBox.Show("无法创建Excel对象,可能您的计算机未安装Excel!");
                    return false;
                }
                try
                {
                    excel.Application.Workbooks.Add(true);
                    excel.Visible = isShowExcel;
                    /*分析标题的跨列数*/
                    foreach (DataGridViewColumn column in dgv.Columns)
                    {
                        if (column.Visible == true)
                            titleColumnSpan++;
                    }
                    /*合并标题单元格*/
                    Microsoft.Office.Interop.Excel.Worksheet worksheet = (Microsoft.Office.Interop.Excel.Worksheet)excel.ActiveSheet;
                    //worksheet.get_Range("A1", "C10").Merge();           
                    worksheet.get_Range(worksheet.Cells[1, 1] as Range, worksheet.Cells[1, titleColumnSpan] as Range).Merge();
                    /*生成标题*/
                    excel.Cells[1, 1] = title;
                    (excel.Cells[1, 1] as Range).HorizontalAlignment = XlHAlign.xlHAlignCenter;//标题居中
                    //生成字段名称
                    columnIndex = 1;
                    for (int i = 0; i < dgv.ColumnCount; i++)
                    {
                        if (dgv.Columns[i].Visible == true)
                        {
                            excel.Cells[2, columnIndex] = dgv.Columns[i].HeaderText;
                            (excel.Cells[2, columnIndex] as Range).HorizontalAlignment = XlHAlign.xlHAlignCenter;//字段居中
                            columnIndex++;
                        }
                    }
                    //填充数据             
                    for (int i = 0; i < dgv.RowCount; i++)
                    {
                        columnIndex = 1;
                        for (int j = 0; j < dgv.ColumnCount; j++)
                        {
                            if (dgv.Columns[j].Visible == true)
                            {
                                if (dgv[j, i].ValueType == typeof(string))
                                {
                                    excel.Cells[i + 3, columnIndex] = "'" + dgv[j, i].Value.ToString();
                                }
                                else
                                {
                                    excel.Cells[i + 3, columnIndex] = dgv[j, i].Value.ToString();
                                }
                                (excel.Cells[i + 3, columnIndex] as Range).HorizontalAlignment = XlHAlign.xlHAlignLeft;//字段居中
                                columnIndex++;
                            }
                        }
                    }
                    worksheet.SaveAs(fileName, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing);
                }
                catch { }
                finally
                {
                    excel.Quit();
                    excel = null;
                    GC.Collect();
                }
                //KillProcess("Excel");
                return true;
            //}
            //else
            //{
            //    return false;
            //}
        }
        private static void KillProcess(string processName)//杀死与Excel相关的进程
        {
            System.Diagnostics.Process myproc = new System.Diagnostics.Process();//得到所有打开的进程
            try
            {
                foreach (System.Diagnostics.Process thisproc in System.Diagnostics.Process.GetProcessesByName(processName))
                {
                    if (!thisproc.CloseMainWindow())
                    {
                        thisproc.Kill();
                    }
                }
            }
            catch (Exception Exc)
            {
                throw new Exception("", Exc);
            }
        }

       

    }

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  • 原文地址:https://www.cnblogs.com/zhang9418hn/p/2797298.html
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