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我发现excel最新的扩展名.xlsx不用打开文件在计算机里就可以直接搜里面的内容。但老的.xls就搜不到。
1.C#写的操作EXCEL应用 提示“office检测到此文件存在一个问题。为帮助保护您的计算机,不能打开此文件。 之前还正常,换个电脑就报错。
先手工打开Excel,会提示“受保护的视图”,不能编辑。点启用编辑就行了。再打开软件,正常了。
2.找不到引用microsoft.office.core
在项目引用中右击选择添加引用,选择COM里面选择Microft Office 12.0 object Library和Microft Excel 12.0 object Library分别点确定即可!同样如果要引用World选Microft World 12.0 object Library! 2003/2007共通处理方式 分别为11或12版本 添加.net中Microsoft.Office.Interop.excel; 添加.net中Office
3.源码示例
using System;using System.Reflection;using System.IO;using Microsoft.Office.Interop.Excel;namespace Excel{ class Excel { public static int startRow =5; public static string jzmc = ""; public static string id = ""; public static Double count = 0; public static Array zw; public static bool WriteXls(string filename, System.Collections.ArrayList rowData, int sheetNum) { //启动Excel应用程序 Microsoft.Office.Interop.Excel.Application xls = new Microsoft.Office.Interop.Excel.Application(); // _Workbook book = xls.Workbooks.Add(Missing.Value); //创建一张表,一张表可以包含多个sheet //如果表已经存在,可以用下面的命令打开 _Workbook book = xls.Workbooks.Open(filename, Missing.Value, Missing.Value, Missing.Value, Missing.Value, Missing.Value, Missing.Value, Missing.Value, Missing.Value, Missing.Value, Missing.Value, Missing.Value, Missing.Value, Missing.Value, Missing.Value); _Worksheet sheet;//定义sheet变量 xls.Visible = false;//设置Excel后台运行 xls.DisplayAlerts = false;//设置不显示确认修改提示 //创建并写入数据到sheet try { sheet = (_Worksheet)book.Worksheets.get_Item(sheetNum);//获得第i个sheet,准备写入 } catch (Exception ex)//不存在就增加一个sheet { sheet = (_Worksheet)book.Worksheets.Add(Missing.Value, book.Worksheets[book.Sheets.Count], 1, Missing.Value); } //sheet.Name = "第" + i.ToString() + "页";//设置当前sheet的Name sheet.get_Range("C3", Type.Missing).Cells.Value2=jzmc; sheet.get_Range("G3", Type.Missing).Cells.Value2=id; sheet.get_Range("I3", Type.Missing).Cells.Value2=count; for (int offset = 0; offset < 10; offset++) { string str = rowData[offset].ToString(); sheet.Cells[startRow, offset + 1] = rowData[offset].ToString(); } startRow++;//行位置向前加 //将表另存为 // book.SaveAs(filename, Missing.Value, Missing.Value, Missing.Value, Missing.Value, Missing.Value, XlSaveAsAccessMode.xlNoChange, Missing.Value, Missing.Value, Missing.Value, Missing.Value, Missing.Value); //如果表已经存在,直接用下面的命令保存即可 book.Save(); book.Close(false, Missing.Value, Missing.Value);//关闭打开的表 xls.Quit();//Excel程序退出 //sheet,book,xls设置为null,防止内存泄露 sheet = null; book = null; xls = null; GC.Collect();//系统回收资源 return true; } public static bool CreateFile(string filename) { try { //启动Excel应用程序 Microsoft.Office.Interop.Excel.Application xls = new Microsoft.Office.Interop.Excel.Application(); _Workbook book = xls.Workbooks.Add(Missing.Value); //创建一张表,一张表可以包含多个sheet xls.DisplayAlerts = false;//设置不显示确认修改提示 //将表另存为 book.SaveAs(filename, Missing.Value, Missing.Value, Missing.Value, Missing.Value, Missing.Value, XlSaveAsAccessMode.xlNoChange, Missing.Value, Missing.Value, Missing.Value, Missing.Value, Missing.Value); book.Close(false, Missing.Value, Missing.Value);//关闭打开的表 xls.Quit();//Excel程序退出 //sheet,book,xls设置为null,防止内存泄露 xls = null; GC.Collect();//系统回收资源 } catch (Exception ex)//不存在就退出 { return false; } return true; } public static Array ReadXls(string filename, int index)//读取第index个sheet的数据 { //启动Excel应用程序 Microsoft.Office.Interop.Excel.Application xls = new Microsoft.Office.Interop.Excel.Application(); //打开filename表 _Workbook book = xls.Workbooks.Open(filename, Missing.Value, Missing.Value, Missing.Value, Missing.Value, Missing.Value, Missing.Value, Missing.Value, Missing.Value, Missing.Value, Missing.Value, Missing.Value, Missing.Value, Missing.Value, Missing.Value); try { _Worksheet sheet;//定义sheet变量 xls.Visible = false;//设置Excel后台运行 xls.DisplayAlerts = false;//设置不显示确认修改提示 sheet = (_Worksheet)book.Worksheets.get_Item(index);//获得第index个sheet,准备读取 Console.WriteLine(sheet.Name); int row = sheet.UsedRange.Rows.Count;//获取不为空的行数 int col = sheet.UsedRange.Columns.Count;//获取不为空的列数 jzmc = sheet.get_Range("C3", Type.Missing).Cells.Value2; id = sheet.get_Range("G3", Type.Missing).Cells.Value2; count = sheet.get_Range("I3", Type.Missing).Cells.Value2; zw = (Array)sheet.get_Range("B5", "B" + row).Cells.Value2; //获得区域数据赋值给Array数组,方便读取 Array value = (Array)sheet.get_Range("A5", "F" + row).Cells.Value2; //获得区域数据赋值给Array数组,方便读取 // Array value = (Array)sheet.get_Range(sheet.Cells[1, 1], sheet.Cells[row, col]).Cells.Value2; book.Save();//保存 book.Close(false, Missing.Value, Missing.Value);//关闭打开的表 xls.Quit();//Excel程序退出 //sheet,book,xls设置为null,防止内存泄露 sheet = null; book = null; xls = null; GC.Collect();//系统回收资源 return value; } catch (Exception ex)//不存在就退出 { book.Close(false, Missing.Value, Missing.Value);//关闭打开的表 xls.Quit();//Excel程序退出 //sheet,book,xls设置为null,防止内存泄露 book = null; xls = null; GC.Collect();//系统回收资源 return null; } } public static void Copy(string path, string path2) { //string path = @"c:/temp/MyTest.txt"; // string path2 = path + "temp"; try { // Create the file and clean up handles. // using (FileStream fs = File.Create(path)) { } // Ensure that the target does not exist. File.Delete(path2); // Copy the file. // File.Copy(path, path2); // Console.WriteLine("{0} copied to {1}", path, path2); // Try to copy the same file again, which should succeed. File.Copy(path, path2, true); // Console.WriteLine("The second Copy operation succeeded, which was expected."); } catch { // Console.WriteLine("Double copy is not allowed, which was not expected."); } } public static void Test() { string Current; Current = Directory.GetCurrentDirectory();//获取当前根目录 Array Data = ReadXls(Current + "\\JMO-PCBA-019.xls", 1);//读取test.xls的第一个sheet表 foreach (string temp in Data) Console.WriteLine(temp); Console.ReadKey(); } }}