MVC中用NPOI匯出Excel相關問題

NPOI MVC模式 · 發表 2018-10-25 13:45:00

摘要：情形1：可以直接帶引數前端頁面： @.ActionLink("匯出Excel", "DownLoadExcel", new { 引數名= '引數值' }, new { style = "margin-right:10px;...

情形1：可以直接帶引數

前端頁面：

@.ActionLink("匯出Excel", "DownLoadExcel", new { 引數名= '引數值' }, new { style = "margin-right:10px;", @class = "btn btn-green search" })

style 和 class 都可以新增樣式

controller匯出方法(可以直接將Excel匯出瀏覽器建議用谷歌)

方法如下：

public System.Web.Mvc.FileResult DownLoadExcel(string Id)

{

int ClassId = Convert.ToInt32(Request["ClassId"]);
string[] titleList = new string[] { "編號", "學員姓名", "單位", "聯絡方式", "身份證號碼", "繳費情況", "繳費方式", "所在班級", "備註資訊" };
IList<MODEL.Train.V_TrainProgramDetail> list = GetData()//獲取資料方法



//建立Excel檔案的物件
NPOI.HSSF.UserModel.HSSFWorkbook book = new NPOI.HSSF.UserModel.HSSFWorkbook();
//新增一個sheet
NPOI.SS.UserModel.ISheet sheet1 = book.CreateSheet("Sheet1");
//給sheet1新增第一行的頭部標題
IRow headerrow = sheet1.CreateRow(0);

HSSFCellStyle headStyle = (HSSFCellStyle)book.CreateCellStyle();
HSSFFont font = (HSSFFont)book.CreateFont();
font.FontHeightInPoints = 10;
font.Boldweight = 700;
headStyle.SetFont(font);
for (int i = 0; i < titleList.Length; i++)
{
ICell cell = headerrow.CreateCell(i);
cell.CellStyle = headStyle;
cell.SetCellValue(titleList[i]);
}

//將資料逐步寫入sheet1各個行
for (int i = 0; i < list.Count; i++)
{
NPOI.SS.UserModel.IRow rowtemp = sheet1.CreateRow(i + 1);
rowtemp.CreateCell(0).SetCellValue(list[i].Id.ToString());
rowtemp.CreateCell(1).SetCellValue(list[i].CompanyName);
rowtemp.CreateCell(2).SetCellValue(list[i].CompanyName);
rowtemp.CreateCell(3).SetCellValue(list[i].Phone);
rowtemp.CreateCell(4).SetCellValue(list[i].IDCard);
rowtemp.CreateCell(5).SetCellValue(list[i].IsPay.ToString());
rowtemp.CreateCell(6).SetCellValue(list[i].SignUpType.ToString());
rowtemp.CreateCell(7).SetCellValue(list[i].ClassName);
rowtemp.CreateCell(8).SetCellValue("");
}
// 寫入到客戶端 
System.IO.MemoryStream ms = new System.IO.MemoryStream();
book.Write(ms);
ms.Seek(0, SeekOrigin.Begin);
return File(ms, "application/vnd.ms-excel", "學員報名詳情.xls");

}

情形2：不能直接帶引數，需要用到ajax

前端頁面：

<div class="modal-content">
<div class="modal-header" style="height:120px;">
<button type="button" class="close" data-dissmiss="modal" aria-hidden="true" onclick="CancleImportExcel()">×</button>
<h4 id="title">請選擇時間範圍</h4>
<div class="modal-dialog container">
<div class="row">
<div class="col-xs-6">
<inputtype="hidden" name="id" id="id" />
<label>訂單開始時間：</label>
<span>
<input type="text" id="OrderStartTime" name="OrderStartTime" onclick="WdatePicker({ dateFmt:'yyyy-MM-dd HH:mm:ss' })" class="Wdate" />
</span>
</div>
<div class="col-xs-6">
<label>結束時間：</label>
<span>
<input type="text" id="OrderEndTime" name="OrderEndTime" onclick="WdatePicker({ dateFmt: 'yyyy-MM-dd HH:mm:ss' })" class="Wdate" />
</span>
</div>
</div>
</div>
</div>
<div class="modal-footer"><button type="button" class="btn btn-default" data-dissmiss="modal" onclick="Export()">確定</button>
</div>
</div>

<script>
function Export() {
var param = {
OrderStartTime: $("#OrderStartTime").val(),
OrderEndTime: $("#OrderEndTime").val()
};
$.ajax({
url: '/Order/DownLoadExcel', //Controller名稱和方法名
type: "POST",
dataType: "json",
data: param,
success: function (data) {
//重定向返回引數
location.href = "/Order/OutExcel?guid=" + data;
} 
});
}
</script>

Controller方法如下：

public ActionResult DownLoadExcel()
{
#region 查詢資料
string OrderStartTime = Convert.ToDateTime(Request["OrderStartTime"]).ToString("yyyy-MM-dd");
string OrderEndTime = Convert.ToDateTime(Request["OrderEndTime"]).AddDays(1).ToString("yyyy-MM-dd");

string[] titleList = new string[] { "序號", "訂單編號", "收貨人", "送貨單位", "送貨地址", "商品編號", "商品名稱", "聯絡電話", "總價", "訂單狀態", "建立時間", "配送時間", "備註資訊" };
IList<Model.Order.OrderInfo> list = OrderInfoBLL.GetOrdersInfoListByTime(OrderStartTime, OrderEndTime);
#endregion

#region NPOI資料匯出
//建立Excel檔案的物件
NPOI.HSSF.UserModel.HSSFWorkbook book = new NPOI.HSSF.UserModel.HSSFWorkbook();
//新增一個sheet
NPOI.SS.UserModel.ISheet sheet1 = book.CreateSheet("Sheet1");
//給sheet1新增第一行的頭部標題
IRow headerrow = sheet1.CreateRow(0);

HSSFCellStyle headStyle = (HSSFCellStyle)book.CreateCellStyle();
HSSFFont font = (HSSFFont)book.CreateFont();
font.FontHeightInPoints = 10;
font.Boldweight = 700;
headStyle.SetFont(font);
for (int i = 0; i < titleList.Length; i++)
{
ICell cell = headerrow.CreateCell(i);
cell.CellStyle = headStyle;
cell.SetCellValue(titleList[i]);
}
//將資料逐步寫入sheet1各個行
for (int i = 0; i < list.Count; i++)
{
NPOI.SS.UserModel.IRow rowtemp = sheet1.CreateRow(i + 1);
rowtemp.CreateCell(0).SetCellValue(i + 1);
rowtemp.CreateCell(1).SetCellValue(list[i].No);
rowtemp.CreateCell(2).SetCellValue(list[i].Receiver);
rowtemp.CreateCell(3).SetCellValue(list[i].Company);
rowtemp.CreateCell(4).SetCellValue(list[i].Address);
rowtemp.CreateCell(5).SetCellValue(list[i].CargoNo);
rowtemp.CreateCell(6).SetCellValue(list[i].CargoName);
rowtemp.CreateCell(7).SetCellValue(list[i].Phone);
rowtemp.CreateCell(8).SetCellValue(list[i].Prices.ToString());
rowtemp.CreateCell(9).SetCellValue(list[i].Status == 0 ? "待稽核" : list[i].Status == 1 ? "已稽核待收貨" : list[i].Status == 2 ? "已收貨已完成" : "取消稽核不通過");
rowtemp.CreateCell(10).SetCellValue(list[i].CreateDate.ToString("yyyy-MM-dd"));
rowtemp.CreateCell(11).SetCellValue(list[i].DeliveryTime.ToString("yyyy-MM-dd HH:mm"));
rowtemp.CreateCell(12).SetCellValue("");
}
var guid = Guid.NewGuid().ToString();
DownLoadHelper.SetCache(guid, book);
return Json(guid, JsonRequestBehavior.AllowGet);
#endregion
}


public void OutExcel(string guid)
{
object obj = DownLoadHelper.GetCache(guid);
NPOI.HSSF.UserModel.HSSFWorkbook book = obj as NPOI.HSSF.UserModel.HSSFWorkbook;
if (book != null)
{
//寫入到客戶端
MemoryStream ms = new MemoryStream();
book.Write(ms);
Response.AddHeader("Content-Disposition", string.Format("attachment;filename={0}.xls", DateTime.Now.ToString("yyyyMMddHHmmssfff")));
Response.BinaryWrite(ms.ToArray());
book = null;
ms.Close();
ms.Dispose();
}
DownLoadHelper.RemoveAllCache(guid);
}

就是在Controller不支援直接匯出Excel的時候分兩步驟 1：要先將匯出內容儲存在快取中 2：利用ajax的重定向再將Excel資料匯出

下面是DownLoadHelper類方法：

public class DownLoadHelper
{
#region 獲取快取
public static object GetCache(string cacheKey)
{
System.Web.Caching.Cache objCache = HttpRuntime.Cache;
return objCache[cacheKey];
}
#endregion

#region 設定資料快取
public static void SetCache(string cacheKey, object objObject)
{
System.Web.Caching.Cache objCache = HttpRuntime.Cache;
objCache.Insert(cacheKey, objObject);
}


public static void SetCache(string cacheKey, object objObject, TimeSpan timeOut)
{
System.Web.Caching.Cache objCache = HttpRuntime.Cache;
objCache.Insert(cacheKey, objObject, null, DateTime.MaxValue, timeOut, System.Web.Caching.CacheItemPriority.NotRemovable, null);
}

public static void SetCache(string cacheKey, object objObject, DateTime absoluteExpiration, TimeSpan slidingExpiration)
{
System.Web.Caching.Cache objCache = HttpRuntime.Cache;
objCache.Insert(cacheKey, objObject, null, absoluteExpiration, slidingExpiration);
}

#endregion

#region 移除資料快取
public static void RemoveAllCache(string cacheKey)
{
System.Web.Caching.Cache _cache = HttpRuntime.Cache;
_cache.Remove(cacheKey);
}

public static void RemoveAllCache()
{
System.Web.Caching.Cache _cache = HttpRuntime.Cache;
IDictionaryEnumerator cacheEnum = _cache.GetEnumerator();
while (cacheEnum.MoveNext())
{
_cache.Remove(cacheEnum.Key.ToString());
}
}
#endregion
}

希望能對遇到此類問題的朋友有所幫助！

MVC中用NPOI匯出Excel相關問題

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