C#中关于各种导出的方法介绍

本篇文章主要介绍了C# 各种导出方法的相关知识，具有很好的参考价值。下面跟着小编一起来看下吧

第一种：使用 Microsoft.Office.Interop.Excel.dll

首先需要安装 office 的 excel，然后再找到 Microsoft.Office.Interop.Excel.dll 组件，添加到引用。

public void ExportExcel(DataTable dt)    {      if (dt != null)      {        Microsoft.Office.Interop.Excel.Application excel = new Microsoft.Office.Interop.Excel.Application();        if (excel == null)        {          return;        }        //设置为不可见，操作在后台执行，为 true 的话会打开 Excel        excel.Visible = false;        //打开时设置为全屏显式        //excel.DisplayFullScreen = true;        //初始化工作簿        Microsoft.Office.Interop.Excel.Workbooks workbooks = excel.Workbooks;        //新增加一个工作簿，Add（）方法也可以直接传入参数 true        Microsoft.Office.Interop.Excel.Workbook workbook = workbooks.Add(Microsoft.Office.Interop.Excel.XlWBATemplate.xlWBATWorksheet);        //同样是新增一个工作簿，但是会弹出保存对话框        //Microsoft.Office.Interop.Excel.Workbook workbook = excel.Application.Workbooks.Add(true);        //新增加一个 Excel 表(sheet)        Microsoft.Office.Interop.Excel.Worksheet worksheet = (Microsoft.Office.Interop.Excel.Worksheet)workbook.Worksheets[1];        //设置表的名称        worksheet.Name = dt.TableName;        try        {          //创建一个单元格          Microsoft.Office.Interop.Excel.Range range;          int rowIndex = 1;    //行的起始下标为 1          int colIndex = 1;    //列的起始下标为 1          //设置列名          for (int i = 0; i < dt.Columns.Count; i++)          {            //设置第一行，即列名            worksheet.Cells[rowIndex, colIndex + i] = dt.Columns[i].ColumnName;            //获取第一行的每个单元格            range = worksheet.Cells[rowIndex, colIndex + i];            //设置单元格的内部颜色            range.Interior.ColorIndex = 33;            //字体加粗            range.Font.Bold = true;            //设置为黑色            range.Font.Color = 0;            //设置为宋体            range.Font.Name = "Arial";            //设置字体大小            range.Font.Size = 12;            //水平居中            range.HorizontalAlignment = Microsoft.Office.Interop.Excel.XlHAlign.xlHAlignCenter;            //垂直居中            range.VerticalAlignment = Microsoft.Office.Interop.Excel.XlVAlign.xlVAlignCenter;          }          //跳过第一行，第一行写入了列名          rowIndex++;          //写入数据          for (int i = 0; i < dt.Rows.Count; i++)          {            for (int j = 0; j < dt.Columns.Count; j++)            {              worksheet.Cells[rowIndex + i, colIndex + j] = dt.Rows[i][j].ToString();            }          }          //设置所有列宽为自动列宽          //worksheet.Columns.AutoFit();          //设置所有单元格列宽为自动列宽          worksheet.Cells.Columns.AutoFit();          //worksheet.Cells.EntireColumn.AutoFit();          //是否提示，如果想删除某个sheet页，首先要将此项设为fasle。          excel.DisplayAlerts = false;          //保存写入的数据，这里还没有保存到磁盘          workbook.Saved = true;          //设置导出文件路径          string path = HttpContext.Current.Server.MapPath("Export/");          //设置新建文件路径及名称          string savePath = path + DateTime.Now.ToString("yyyy-MM-dd-HH-mm-ss") + ".xlsx";          //创建文件          FileStream file = new FileStream(savePath, FileMode.CreateNew);          //关闭释放流，不然没办法写入数据          file.Close();          file.Dispose();          //保存到指定的路径          workbook.SaveCopyAs(savePath);          //还可以加入以下方法输出到浏览器下载          FileInfo fileInfo = new FileInfo(savePath);          OutputClient(fileInfo);        }        catch(Exception ex)        {        }        finally        {          workbook.Close(false, Type.Missing, Type.Missing);          workbooks.Close();          //关闭退出          excel.Quit();          //释放 COM 对象          Marshal.ReleaseComObject(worksheet);          Marshal.ReleaseComObject(workbook);          Marshal.ReleaseComObject(workbooks);          Marshal.ReleaseComObject(excel);          worksheet = null;          workbook = null;          workbooks = null;          excel = null;          GC.Collect();        }      }    }public void OutputClient(FileInfo file)    {      HttpContext.Current.Response.Buffer = true;      HttpContext.Current.Response.Clear();      HttpContext.Current.Response.ClearHeaders();      HttpContext.Current.Response.ClearContent();      HttpContext.Current.Response.ContentType = "application/vnd.ms-excel";      //导出到 .xlsx 格式不能用时，可以试试这个      //HttpContext.Current.Response.ContentType = "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet";      HttpContext.Current.Response.AddHeader("Content-Disposition", string.Format("attachment; filename={0}.xlsx", DateTime.Now.ToString("yyyy-MM-dd-HH-mm")));      HttpContext.Current.Response.Charset = "GB2312";      HttpContext.Current.Response.ContentEncoding = Encoding.GetEncoding("GB2312");      HttpContext.Current.Response.AddHeader("Content-Length", file.Length.ToString());      HttpContext.Current.Response.WriteFile(file.Fu<div style="color:transparent">本文来源gaodai.ma#com搞##代!^码@网*</div>llName);      HttpContext.Current.Response.Flush();      HttpContext.Current.Response.Close();    }

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