MVC架构下的导出为excel的代码

public void OutPutdata(out string filename, out string filetype, out string filePath, out long filesize, MODEL.ComplexQuery SaveQuery)

{

var querydal = new DAL.ComplexQuery();

querydal.ComQueryData(ref SaveQuery);

var dt = SaveQuery.QueryResult.Tables[0];//返回datatable表

if (dt.Rows.Count < 1)//判断是否存在数据

throw new Exception(@"数据不存在,请与系统管理员联系!");

var savepath = @"D:\PIMS\PROD\ComplexQuery";

if (!Directory.Exists(savepath))//如果不存在则创建该文件夹

Directory.CreateDirectory(savepath);
var xlApp = new Application();

xlApp.DisplayAlerts = true;//是否弹出选择框

xlApp.AlertBeforeOverwriting = true;

var workbooks = xlApp.Workbooks;//定义excel

var workbook = workbooks.Add(XlWBATemplate.xlWBATWorksheet);

var worksheet = (Worksheet)workbook.Worksheets[1];//取得sheet1

Range range = null;//定义range

//写入每列的列名

for (int i = 0; i < dt.Columns.Count; i++)

{

worksheet.Cells[1, i + 1] = dt.Columns[i].ColumnName;

range = (Range)worksheet.Cells[1, i + 1];

range.HorizontalAlignment = XlVAlign.xlVAlignCenter;//居中对齐

}

//动态定义列数

range = xlApp.Range[worksheet.Cells[2, 1], worksheet.Cells[dt.Rows.Count + 1, dt.Columns.Count]];

range.HorizontalAlignment = XlVAlign.xlVAlignCenter;//居中对齐

var data = new object[dt.Rows.Count, dt.Columns.Count];

for (var i = 0; i < dt.Rows.Count; i++)

{

for (var n = 0; n < dt.Columns.Count; n++)

{

data[i, n] = dt.Rows[i]
;

}

}

range.Value2 = data;//将数据赋值到range

workbook.Saved = true;

var newid = "";

var datetime = DateTime.Now.ToString("yyyyMMddhhmmss");

//保存路径

savepath = PubMethod.GetNewPathForDupes(savepath + "\\" + datetime + ".xls", out newid);

workbook.SaveAs(savepath, XlFileFormat.xlExcel8, null, null, false, false,

XlSaveAsAccessMode.xlNoChange, null, null, null, null, null);

System.Runtime.InteropServices.Marshal.ReleaseComObject(workbook);

xlApp.Quit();

workbook = null;

workbooks = null;

worksheet = null;

var fi = new FileInfo(savepath);

filename = savepath;

filetype = "xls";

filesize = fi.Length;

filePath = savepath;

DAL.PROD.PIMSCommon.DataExportLogAdd(datetime, newid, "ComplexQuery", Convert.ToInt32(fi.Length), savepath,

SaveQuery.userID);

GC.Collect();//垃圾回收

}

Controller中代码:

using (var bll = new QueryBLL.QueryClient())

{

var filename = "";

var filetype = "";

var filePath = "";

long filesize;

bll.OutPutdata(out filetype, out filePath, out filesize, CDQuery);

jr.Data = new

{

iserror = false,

filename = filePath.Substring(filePath.LastIndexOf(@"\") + 1),//文件名

filetype = filetype,//文件类型

filePath = filePath,//文件路径

filesize = (filesize / long.Parse("1024")).ToString("0.00"),//文件大小

};

}