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C#操作Excel

原作者: [db:作者] 来自: [db:来源] 收藏 邀请
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.Collections;
using System.IO;
using System.Runtime.InteropServices;
public static string path输出 = Directory.GetCurrentDirectory() + @"\输出";
public static DataTable DT_日立清单_辅助000 = new DataTable();

加载Excel,将内容填充到一个datatable里去,修改后,可以作为datagridview的数据源

public static void ImportDT_日立清单_辅助000()
{
    ...
    ArrayList filename = GetFileName(excel的路径)
    //obj.ToString()是excel的完全路径,excel可以有多个,foreach(object obj in filename)...

    string strConn = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + obj.ToString() + ";Extended Properties=" + "\"" + 
"Excel 8.0;HDR=No;IMEX=1" + "\"";//没有标题,只读
     OleDbConnection conn = new OleDbConnection(strConn);
    conn.Open();
    ////返回Excel的架构,包括各个sheet表的名称,类型,创建时间和修改时间等
    //System.Data.DataTable dtSheetName = conn.GetOleDbSchemaTable(OleDbSchemaGuid.Tables, new object[] { null, null, null, "Table" });
    ////包含excel中表名的字符串数组
    //string[] strTableNames = new string[dtSheetName.Rows.Count];
    //for (int k = 0; k < dtSheetName.Rows.Count; k++)
    //{
    //    strTableNames[k] = dtSheetName.Rows[k]["TABLE_NAME"].ToString();
    //    //MessageBox.Show(strTableNames[k]);
    //}
    ////从指定的表明查询数据,可先把所有表明列出来供用户选择
    ////string strExcel = "select * from [" + strTableNames[0] + "] ";
    string strExcel = "select F1,F2,F3,F4,F5 from [Sheet1$] where ( F4<> \"\" and F4 not like \"%工号%\")";
    OleDbDataAdapter myCommand = new OleDbDataAdapter(strExcel, strConn);
    myCommand.Fill(dt);
    conn.Close();
    conn.Dispose();
    ...

    //根据dt,补充内容得到DT_日立清单_辅助000
    for (int i = 0; i <= dt.Rows.Count - 1; i++)
    {
        DataRow row = DT_日立清单_辅助000.NewRow();
        row["ID2"] = (i + 1).ToString();
        row["订单号"] = dt.Rows[i][0].ToString();
        row["工号"] = dt.Rows[i][1].ToString();
        row["数量"] = dt.Rows[i][2].ToString();
        row["导入文件"] = Path.GetFileName(obj.ToString());
        DT_日立清单_辅助000.Rows.Add(row);
    }
}

创建一个空的datatable,作为datagridview的数据源

public static DataTable CreatNullDT_日立清单_辅助000()
{
    DataTable data = new DataTable();
    DataColumn do1 = new DataColumn("ID", typeof(int));
    do1.AllowDBNull = false;
    do1.AutoIncrement = true;
    do1.AutoIncrementSeed = 1;
    do1.AutoIncrementStep = 1;
    data.Columns.Add(do1);
    do1 = new DataColumn("ID2", typeof(string));
    data.Columns.Add(do1);
    do1 = new DataColumn("订单号", typeof(string));
    data.Columns.Add(do1);
    do1 = new DataColumn("工号", typeof(string));
    data.Columns.Add(do1);
    do1 = new DataColumn("数量", typeof(string));
    data.Columns.Add(do1);
    do1 = new DataColumn("导入文件", typeof(string));
    data.Columns.Add(do1);
    return data;
}
//根据文件夹路径得到全部文件路径(完整)数组
public static ArrayList GetFileName(string dirPath)
{
    ArrayList list = new ArrayList();
    if (Directory.Exists(dirPath))
    {
        list.AddRange(Directory.GetFiles(dirPath));
    }
    return list;
}

删除清空一个目录下所有文件

private void btnClear_Click(object sender, EventArgs e)
{
    ArrayList filename = MDIParent1.GetFileName(MDIParent1.path输出);
    foreach (object obj in filename)
    {
        File.Delete(obj.ToString());
    }
}

代码里有创建记事本,写入内容,关闭,再追加内容,关闭。FileMode.Create,FileMode.Append。多余的内容很多,只能自己看看。

private void btnOut_Click(object sender, EventArgs e)
{
    this.Text = "正在输出……";
    if (MDIParent1.DT_交期变更.Rows.Count < 2)
    {
        MessageBox.Show("交期变更没有导入"); return;
    }
    if (MDIParent1.DT_日立清单_辅助000.Rows.Count < 2)
    {
        MessageBox.Show("日立清单_辅助000没有导入"); return;
    }
    if (MDIParent1.DT_工艺卡_辅助00.Rows.Count < 2)
    {
        MessageBox.Show("工艺卡_辅助00没有导入"); return;
    }
    if (MDIParent1.DT_工艺卡_数据00.Rows.Count < 2)
    {
        MessageBox.Show("工艺卡_数据00没有导入"); return;
    }

    progressBar1.Maximum = MDIParent1.DT_交期变更.Rows.Count;
    progressBar1.Value = 0;

    string str = MDIParent1.path输出 + "\\" + DateTime.Now.Year.ToString().Trim() + DateTime.Now.Month.ToString().Trim() + DateTime.Now.Day.ToString().Trim() + DateTime.Now.Hour.ToString().Trim() + DateTime.Now.Minute.ToString().Trim() + DateTime.Now.Millisecond.ToString().Trim() + ".txt";
    FileStream fs = new FileStream(str, FileMode.Create);
    StreamWriter sw = new StreamWriter(fs);
    sw.Write("日立清单,只显示“常规支架”和“空白”。没有把工号打掉,即同一订单两个工号下同一个图号,显示两条记录\r\n");
    sw.Flush();
    sw.Close();
    fs.Close();

    for (int i = 0; i <= MDIParent1.DT_交期变更.Rows.Count - 1; i++)
    {
        progressBar1.Value = i + 1;
        //要取消的台帐日期、订单号和工号
        string taizhangriqi = MDIParent1.DT_交期变更.Rows[i][2].ToString().Trim();
        string dingdanhao = MDIParent1.DT_交期变更.Rows[i][1].ToString().Trim();
        string gonghao = MDIParent1.DT_交期变更.Rows[i][3].ToString().Trim();

        fs = new FileStream(str, FileMode.Append);
        sw = new StreamWriter(fs);
        sw.Write("交期变更:台帐日期:" + taizhangriqi + "订单号:" + dingdanhao + "工号:" + gonghao + "\r\n");
        sw.Flush();
        sw.Close();
        fs.Close();

        for (int i2 = 0; i2 <= MDIParent1.DT_日立清单_辅助000.Rows.Count - 1; i2++)
        {
            //台帐日期、订单号、工号
            if (MDIParent1.DT_日立清单_辅助000.Rows[i2][2].ToString().Trim() == taizhangriqi && MDIParent1.DT_日立清单_辅助000.Rows[i2][5].ToString().Trim() == dingdanhao && MDIParent1.DT_日立清单_辅助000.Rows[i2][6].ToString().Trim() == gonghao)
            {
                string tuhao = MDIParent1.DT_日立清单_辅助000.Rows[i2][4].ToString().Trim();
                string shuliang = MDIParent1.DT_日立清单_辅助000.Rows[i2][7].ToString().Trim();
                string daoruwenjian = MDIParent1.DT_日立清单_辅助000.Rows[i2][8].ToString().Trim();
                string hang = MDIParent1.DT_日立清单_辅助000.Rows[i2][1].ToString().Trim();
                fs = new FileStream(str, FileMode.Append);
                sw = new StreamWriter(fs);
                sw.Write("日立清单里第" + (i2 + 1).ToString().Trim() + "条记录找到:台帐日期:" + taizhangriqi + "订单号:" + dingdanhao + "工号:" + gonghao + "图号:" + tuhao + "数量:" + shuliang + "导入文件:" + daoruwenjian + "" + hang + "条\r\n");
                sw.Flush();
                sw.Close();
                fs.Close();


                for (int i3 = 0; i3 <= MDIParent1.DT_工艺卡_辅助00.Rows.Count - 1; i3++)
                {
                    //台帐日期、订单号、图号
                    //123456~458:123.1
                    string str3 = MDIParent1.DT_工艺卡_辅助00.Rows[i3][2].ToString().Trim().Split(':')[0];//单号123456~458
                    if (MDIParent1.DT_工艺卡_辅助00.Rows[i3][3].ToString().Trim() == "台帐日期:" + taizhangriqi && (MDIParent1.DT_工艺卡_辅助00.Rows[i3][2].ToString().Trim().Contains("单号" + dingdanhao + ":") || (str3.Contains("~") && (str3.Split('~')[0].Substring(0, str3.Split('~')[0].Length - str3.Split('~')[1].Length) + str3.Split('~')[1]) == ("单号" + dingdanhao))) && MDIParent1.DT_工艺卡_辅助00.Rows[i3][4].ToString().Trim().Split('')[1].Split(':')[1] == tuhao)
                    {
                        string dingdanhao3 = MDIParent1.DT_工艺卡_辅助00.Rows[i3][2].ToString().Trim();
                        string shuliang3 = MDIParent1.DT_工艺卡_辅助00.Rows[i3][5].ToString().Trim().Split('')[0].Split('=')[1];
                        string daoruwenjian3 = MDIParent1.DT_工艺卡_辅助00.Rows[i3][6].ToString().Trim();
                        string hang3 = MDIParent1.DT_工艺卡_辅助00.Rows[i3][1].ToString().Trim();
                        string pathAndName3 = MDIParent1.path输出 + "\\" + MDIParent1.DT_工艺卡_辅助00.Rows[i3][6].ToString().Trim();
                        //if(MDIParent1.DT_工艺卡_数据00.Rows[i3 + 1][7].ToString() !=shuliang3)
                        //{
                        //    MessageBox.Show("工艺卡数据00数量和辅助00数量不一样。数据00的" + MDIParent1.DT_工艺卡_数据00.Rows[i3 + 1][0].ToString());
                        //    return;
                        //}
                        MDIParent1.DT_工艺卡_数据00.Rows[i3 + 1][7] = (int.Parse(shuliang3) - int.Parse(shuliang)).ToString();                                
                        fs = new FileStream(str, FileMode.Append);
                        sw = new StreamWriter(fs);
                        sw.Write("工艺卡里第" + (i3 + 1).ToString().Trim() + "条记录找到:台帐日期" + taizhangriqi + "订单号" + dingdanhao3 + "图号" + tuhao + "数量" + shuliang3 + "导入文件" + daoruwenjian3 + "" + hang3 + "条\r\n");
                        sw.Flush();
                        sw.Close();
                        fs.Close();
                    }
                }
            }
        }
    }
    dGV工艺卡_数据00.DataSource = MDIParent1.DT_工艺卡_数据00;
    progressBar1.Value = 0;
    this.Text = "Frm工艺卡_数据00";
    MessageBox.Show("ok");
}
private void btnToExcel_Click(object sender, EventArgs e)
{
    if (MDIParent1.DT_工艺卡_数据00.Rows.Count < 5)
    {
        MessageBox.Show("没有数据可以导出"); return;
    }
    this.Text = "正在导出……";

    ToExcel2(MDIParent1.DT_工艺卡_数据00, saveFileDialog1);

    this.Text = "Frm工艺卡_数据00";
}

将内存中的datatable保存到Excel(批量保存,不是一格一格保存),修改下可以将datagridview保存到Excel

public void ToExcel2(DataTable dt, SaveFileDialog saveFileDialog)
{
    saveFileDialog.Filter = "Execl files (*.xls)|*.xls";
    saveFileDialog.FilterIndex = 0;
    saveFileDialog.RestoreDirectory = true;
    //saveFileDialog.CreatePrompt = true;
    saveFileDialog.Title = "导出文件保存路径";
    string strName = string.Empty;
    if (saveFileDialog.ShowDialog() == DialogResult.OK)
    {
        strName = saveFileDialog.FileName;
    }
    if (strName.Length == 0)
    {
        MessageBox.Show("导出文件保存路径为空");
        return;
    }

    System.Reflection.Missing miss = System.Reflection.Missing.Value;
    //创建EXCEL对象appExcel,Workbook对象,Worksheet对象,Range对象
    Microsoft.Office.Interop.Excel.Application appExcel;
    appExcel = new Microsoft.Office.Interop.Excel.Application();
    Microsoft.Office.Interop.Excel.Workbook workbookData;
    Microsoft.Office.Interop.Excel.Worksheet worksheetData;
    Microsoft.Office.Interop.Excel.Range rangedata;
    //设置对象不可见
    appExcel.Visible = false;
    /* 在调用Excel应用程序,或创建Excel工作簿之前,记着加上下面的两行代码
    * 这是因为Excel有一个Bug,如果你的操作系统的环境不是英文的,而Excel就会在执行下面的代码时,报异常。
    */
    System.Globalization.CultureInfo CurrentCI = System.Threading.Thread.CurrentThread.CurrentCulture;
    System.Threading.Thread.CurrentThread.CurrentCulture = new System.Globalization.CultureInfo("en-US");
    workbookData = appExcel.Workbooks.Add(miss);
    worksheetData = (Microsoft.Office.Interop.Excel.Worksheet)workbookData.Worksheets.Add(miss, miss, miss, miss);
    //给工作表赋名称
    worksheetData.Name = "saved";
    // 保存到WorkSheet的表头,你应该看到,是一个Cell一个Cell的存储,这样效率特别低,解决的办法是,使用Rang,一块一块地存储到Excel
    for (int i = 0; i < dt.Columns.Count; i++)
    {
        worksheetData.Cells[1, i + 1] = dt.Columns[i].ColumnName;
    }
    //先给Range对象一个范围为A2开始,Range对象可以给一个CELL的范围,也可以给例如A1到H10这样的范围
    //因为第一行已经写了表头,所以所有数据都应该从A2开始
    rangedata = worksheetData.get_Range("A2", miss);
    Microsoft.Office.Interop.Excel.Range xlRang = null;
    //iRowCount为实际行数,最大行
    int iRowCount = dt.Rows.Count;
    int iParstedRow = 0, iCurrSize = 0;
    //iEachSize为每次写行的数值,可以自己设置,每次写1000行和每次写2000行大家可以自己测试下效率
    int iEachSize = 1000;
    //iColumnAccount为实际列数,最大列数
    int iColumnAccount = dt.Columns.Count;
    //在内存中声明一个iEachSize×iColumnAccount的数组,iEachSize是每次最大存储的行数,iColumnAccount就是存储的实际列数
    object[,] objVal = new object[iEachSize, iColumnAccount];
    try
    {
        progressBar1.Maximum = dt.Rows.Count;
        iCurrSize = iEachSize;

        while (iParstedRow < iRowCount)
        {
            if ((iRowCount - iParstedRow) < iEachSize)
                iCurrSize = iRowCount - iParstedRow;
            //用FOR循环给数组赋值
            for (int i = 0; i < iCurrSize; i++)
            {
                for (int j = 0; j < iColumnAccount; j++)
                {
                    objVal[i, j] = dt.Rows[i + iParstedRow][j].ToString();
                }
                progressBar1.Value++;
                System.Windows.Forms.Application.DoEvents();
            }
            /*
            * 建议使用设置断点研究下哈
            * 例如A1到H10的意思是从A到H,第一行到第十行
            * 下句很关键,要保证获取Sheet中对应的Range范围
            * 下句实际上是得到这样的一个代码语句xlRang = worksheetData.get_Range("A2","H100");
            * 注意看实现的过程
            * 'A' + iColumnAccount - 1这儿是获取你的最后列,A的数字码为65,大家可以仔细看下是不是得到最后列的字母
            * iParstedRow + iCurrSize + 1获取最后行
            * 若WHILE第一次循环的话这应该是A2,最后列字母+最后行数字
            * iParstedRow + 2要注意,每次循环这个值不一样,他取决于你每次循环RANGE取了多大,循环了几次,也就是iEachSize设置值的大小哦
            */
            xlRang = worksheetData.get_Range("A" + ((int)(iParstedRow + 2)).ToString(), ((char)('A' + iColumnAccount - 1)).ToString() + ((int)(iParstedRow + iCurrSize + 1)).ToString());
            // 调用Range的Value2属性,把内存中的值赋给Excel
            xlRang.Value2 = objVal;
            iParstedRow = iParstedRow + iCurrSize;
        }
        //保存工作表
        worksheetData.SaveAs(strName, miss, miss, miss, miss, miss, Microsoft.Office.Interop.Excel.XlSaveAsAccessMode.xlNoChange, miss, miss, miss);
        workbookData.Close();                
        appExcel.Quit();                
        System.Runtime.InteropServices.Marshal.ReleaseComObject(xlRang);
        xlRang = null;
        System.Runtime.InteropServices.Marshal.ReleaseComObject(worksheetData);
        System.Runtime.InteropServices.Marshal.ReleaseComObject(workbookData);
        //System.Runtime.InteropServices.Marshal.ReleaseComObject(appExcel);
        progressBar1.Value = 0;
        //调用方法关闭EXCEL进程,大家可以试下不用的话如果程序不关闭在进程里一直会有EXCEL.EXE这个进程并锁定你的EXCEL表格
        KillSpecialExcel(appExcel);
        GC.Collect();
        MessageBox.Show("数据已经成功导出到:" + saveFileDialog.FileName.ToString(), "导出完成", MessageBoxButtons.OK, MessageBoxIcon.Information);
    }
    catch (Exception ex)
    {
        MessageBox.Show(ex.Message);
        return;
    }
    // 别忘了在结束程序之前恢复你的环境!                   
    System.Threading.Thread.CurrentThread.CurrentCulture = CurrentCI;
}
public void KillSpecialExcel(Microsoft.Office.Interop.Excel.Application m_objExcel)
{
    try
    {
        if (m_objExcel != null)
        {
            int lpdwProcessId;
            GetWindowThreadProcessId(new IntPtr(m_objExcel.Hwnd), out lpdwProcessId);
            System.Diagnostics.Process.GetProcessById(lpdwProcessId).Kill();
        }
    }
    catch (Exception ex)
    {
        MessageBox.Show(ex.Message);
    }
}
#region 结束EXCEL.EXE进程的方法
/// <summary>
/// 结束EXCEL.EXE进程的方法
/// </summary>
/// <param name="m_objExcel">EXCEL对象</param>
[DllImport("user32.dll", SetLastError = true)]
static extern int GetWindowThreadProcessId(IntPtr hWnd, out int lpdwProcessId);
#endregion

 


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