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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;

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:

[csharp] view plain copy

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

结果:

4.读取excel

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]+"
";  
             
        }  
       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:

[csharp] view plain copy

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

结果;

添加一个opendiog用于选择要读取的excel

命名空间

[csharp] view plain copy

using System.Diagnostics;

读取函数

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原文地址：https://www.cnblogs.com/lizhenlin/p/6404251.html