今天预实现一功能,将txt中的数据转到excel表中,做为matlab的数据源。搜集一些c#操作excel的程序。步骤如下:
下载一个Microsoft.Office.Interop.Excel.dll 在项目中引用。
编写代码如下:
string path = "c://date//xyu.txt"; StreamReader sr = new StreamReader(path); string strLine = sr.ReadLine(); int rowNum = 1; object missing = System.Reflection.Missing.Value; ApplicationClass app = new ApplicationClass(); app.Application.Workbooks.Add(true); Workbook book = (Workbook)app.ActiveWorkbook; Worksheet sheet = (Worksheet)book.ActiveSheet; while (!string.IsNullOrEmpty(strLine)) { string[] tempArr; tempArr = strLine.Split(','); for (int k = 1; k <= tempArr.Length; k++) { sheet.Cells[rowNum, k] = tempArr[k - 1]; } strLine = sr.ReadLine(); rowNum++; } //保存excel文件 book.SaveCopyAs("D://source.xls"); //关闭文件 book.Close(false, missing, missing); //退出excel app.Quit(); MessageBox.Show("转化成功!");
以上代码可以实现功能,由于txt中的数据有60501行,数据量太大。我估算了一下,用以上代码转到excel要用大约2-3分钟。我一共要转9个txt。一共要用20多分钟。这样作出系统显然是让人难以忍受的。接着找资料,发现用rang方法可以提高速率。只用大约3-4秒钟的时间,提高效率几十倍。代码如下:
string path = "c://date//xyu.txt"; StreamReader sr = new StreamReader(path); string strLine = sr.ReadLine(); int rowNum = 1; object missing = System.Reflection.Missing.Value; ApplicationClass app = new ApplicationClass(); app.Application.Workbooks.Add(true); Workbook book = (Workbook)app.ActiveWorkbook; Worksheet sheet = (Worksheet)book.ActiveSheet; Range r = sheet.get_Range("A1", "C1"); //获取行数 object[,] objectData = new object[65535, 3]; while (!string.IsNullOrEmpty(strLine)) { string[] tempArr; tempArr = strLine.Split(','); for (int k = 1; k <= tempArr.Length; k++) { objectData[rowNum-1, k-1] = tempArr[k - 1]; } strLine = sr.ReadLine(); rowNum++; } r = r.get_Resize(65535, 3); r.Value2 = objectData; r.EntireColumn.AutoFit(); //保存excel文件 book.SaveCopyAs("D://source.xls"); //关闭文件 book.Close(false, missing, missing); //退出excel app.Quit(); MessageBox.Show("转化成功!");
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