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

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using System.Reflection;

using Excel = Microsoft.Office.Interop.Excel;

3.写入excel

写入函数

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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:

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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

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using System.Diagnostics;

读取函数:

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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:

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private void button1_Click(object sender, EventArgs e)

{

if (openFileDialog.ShowDialog() == DialogResult.OK)

{

OpenExcel(openFileDialog.FileName);

}

}

结果;