c#操作excel方式三:使用Microsoft.Office.Interop.Excel.dll读取Excel文件

1、引用Microsoft.Office.Interop.Excel.dll

2、引用命名空间、使用别名

using System.Reflection;

using Excel = Microsoft.Office.Interop.Excel;

 

3.写入excel

写入函数

public void ToExcel(string strTitle)
       {
           int nMax = 9;
           int nMin = 4;

           int rowCount = nMax - nMin + 1;//总行数

           const int columnCount = 4;//总列数



           //创建Excel对象

           Excel.Application excelApp = new Excel.ApplicationClass();



           //新建工作簿

           Excel.Workbook workBook = excelApp.Workbooks.Add(true);



           //新建工作表

           Excel.Worksheet worksheet = workBook.ActiveSheet as Excel.Worksheet;



           ////设置标题

           //Excel.Range titleRange = worksheet.get_Range(worksheet.Cells[1, 1], worksheet.Cells[1, columnCount]);//选取单元格

           //titleRange.Merge(true);//合并单元格

           //titleRange.Value2 = strTitle; //设置单元格内文本

           //titleRange.Font.Name = "宋体";//设置字体

           //titleRange.Font.Size = 18;//字体大小

           //titleRange.Font.Bold = false;//加粗显示

           //titleRange.HorizontalAlignment = Excel.XlHAlign.xlHAlignCenter;//水平居中

           //titleRange.VerticalAlignment = Excel.XlVAlign.xlVAlignCenter;//垂直居中

           //titleRange.Borders.LineStyle = Excel.XlLineStyle.xlContinuous;//设置边框

           //titleRange.Borders.Weight = Excel.XlBorderWeight.xlThin;//边框常规粗细



           //设置表头

           string[] strHead = new string[columnCount] { "序号", "范围", "分组1", "分组2" };

           int[] columnWidth = new int[4] { 8, 16, 8, 10 };

           for (int i = 0; i < columnCount; i++)
           {

               //Excel.Range headRange = worksheet.Cells[2, i + 1] as Excel.Range;//获取表头单元格

               Excel.Range headRange = worksheet.Cells[1, i + 1] as Excel.Range;//获取表头单元格,不用标题则从1开始

               headRange.Value2 = strHead[i];//设置单元格文本

               headRange.Font.Name = "宋体";//设置字体

               headRange.Font.Size = 12;//字体大小

               headRange.Font.Bold = false;//加粗显示

               headRange.HorizontalAlignment = Excel.XlHAlign.xlHAlignCenter;//水平居中

               headRange.VerticalAlignment = Excel.XlVAlign.xlVAlignCenter;//垂直居中

               headRange.ColumnWidth = columnWidth[i];//设置列宽

             //  headRange.Borders.LineStyle = Excel.XlLineStyle.xlContinuous;//设置边框

              // headRange.Borders.Weight = Excel.XlBorderWeight.xlThin;//边框常规粗细

           }



           //设置每列格式

           for (int i = 0; i < columnCount; i++)
           {

               //Excel.Range contentRange = worksheet.get_Range(worksheet.Cells[3, i + 1], worksheet.Cells[rowCount - 1 + 3, i + 1]);

               Excel.Range contentRange = worksheet.get_Range(worksheet.Cells[2, i + 1], worksheet.Cells[rowCount - 1 + 3, i + 1]);//不用标题则从第二行开始

               contentRange.HorizontalAlignment = Excel.XlHAlign.xlHAlignCenter;//水平居中

               contentRange.VerticalAlignment = Excel.XlVAlign.xlVAlignCenter;//垂直居中

               //contentRange.Borders.LineStyle = Excel.XlLineStyle.xlContinuous;//设置边框

              // contentRange.Borders.Weight = Excel.XlBorderWeight.xlThin;//边框常规粗细

               contentRange.WrapText = true;//自动换行

               contentRange.NumberFormatLocal = "@";//文本格式

           }



           //填充数据

           for (int i = nMin; i <= nMax; i++)
           {

               int k = i - nMin;

               //excelApp.Cells[k + 3, 1] = string.Format("{0}", k + 1);

               //excelApp.Cells[k + 3, 2] = string.Format("{0}-{1}", i - 0.5, i + 0.5);

               //excelApp.Cells[k + 3, 3] = string.Format("{0}", k + 3);

               //excelApp.Cells[k + 3, 4] = string.Format("{0}", k + 4);

               excelApp.Cells[k + 2, 1] = string.Format("{0}", k + 1);

               excelApp.Cells[k + 2, 2] = string.Format("{0}-{1}", i - 0.5, i + 0.5);

               excelApp.Cells[k + 2, 3] = string.Format("{0}", k + 3);

               excelApp.Cells[k + 2, 4] = string.Format("{0}", k + 4);

           }



           //设置Excel可见

           excelApp.Visible = true;

       }

 

写入按钮函数:

private void button1_Click(object sender, EventArgs e)
        {
            ToExcel("方式3");

        }

结果:

4.读取excel

添加一个opendiog用于选择要读取的excel

命名空间

using System.Diagnostics;

读取函数:

private void OpenExcel(string strFileName)
{
    object missing = System.Reflection.Missing.Value;
    Excel.Application excel = new Excel.ApplicationClass();//lauch excel application
    if (excel == null)
    {
       this.label1.Text="Can't access excel";
    }
    else
    {
        excel.Visible = false; excel.UserControl = true;
        // 以只读的形式打开EXCEL文件
        Excel.Workbook wb = excel.Application.Workbooks.Open(strFileName, missing, true, missing, missing, missing,
         missing, missing, missing, true, missing, missing, missing, missing, missing);
        //取得第一个工作薄
        Excel.Worksheet ws = (Excel.Worksheet)wb.Worksheets.get_Item(1);
        //取得总记录行数    (包括标题列)
        int rowsint = ws.UsedRange.Cells.Rows.Count; //得到行数
        //int columnsint = mySheet.UsedRange.Cells.Columns.Count;//得到列数
        //取得数据范围区域   (不包括标题列)
        Excel.Range rng1 = ws.Cells.get_Range("A2", "A" + rowsint);
        Excel.Range rng2 = ws.Cells.get_Range("B2", "B" + rowsint);
        Excel.Range rng3 = ws.Cells.get_Range("C2", "C" + rowsint);
        Excel.Range rng4 = ws.Cells.get_Range("D2", "D" + rowsint);
        object[,] arry1 = (object[,])rng1.Value2;   //get range's value
        object[,] arry2 = (object[,])rng2.Value2;
        object[,] arry3 = (object[,])rng3.Value2;   //get range's value
        object[,] arry4 = (object[,])rng4.Value2;
        //将新值赋给一个数组
        string[,] arry = new string[rowsint - 1, 4];
        //for (int i = 1; i <= rowsint - 1; i++)
        for (int i = 1; i <= rowsint - 2; i++)
        {

            arry[i - 1, 0] = arry1[i, 1].ToString();

            arry[i - 1, 1] = arry2[i, 1].ToString();

            arry[i - 1, 2] = arry3[i, 1].ToString();

            arry[i - 1, 3] = arry4[i, 1].ToString();
        }
        string a = "";
        for (int i = 0; i <= rowsint - 3; i++)
        {
            a += arry[i, 0] + "|" + arry[i, 1] + "|" + arry[i, 2] + "|" + arry[i, 3]+"\n";

        }
       this.label1.Text=a;
    }
    excel.Quit(); excel = null;
  Process[] procs = Process.GetProcessesByName("excel");
    foreach (Process pro in procs)
    {
        pro.Kill();//没有更好的方法,只有杀掉进程
    }
    GC.Collect();
}

 

读取按钮代码:

private void button1_Click(object sender, EventArgs e)
      {
          if (openFileDialog.ShowDialog() == DialogResult.OK)
          {
              OpenExcel(openFileDialog.FileName);
          }

      }

 

 结果;