1、前台的表单：
<form enctype="multipart/form-data" method="post" id="inportfile" name="inportfile"><input type="file" name="excelfile" id="excelfile"/></form>
2、数据打包
var postdata = new formdata($("#inportfile")[0]);
3、ajax上传 (使用：$.postuploadajax())
封装后的代码
postuploadajax: function (url, postdata, callbacksuccessfunc, callbackerrorfunc) {
$.ajax({
url: url + "&r=" + math.random(),
data: postdata,
type: "post",
datatype: "json",
processdata: false,
contenttype: false,
success: function (jsondata) {
if (typeof callbacksuccessfunc === "function") {
callbacksuccessfunc(jsondata);
}
},
error: function (e) {
if (typeof callbackerrorfunc === "function") {
callbackerrorfunc(e);
}
}
});
},
5、c#代码 【导入部分】（引用using npoi.core.hssf.usermodel;）
[httppost]
public actionresult importpost(iformfile excelfile)
{
var result = new ajaxresult();
result.state = ajaxstate.success;
result.message = "导入成功！";
try
{
var errorlist = new list<string>();
string path = appdomain.currentdomain.basedirectory + "\\temp";
if (!directory.exists(path))
{
directory.createdirectory(path);
}
string filename = $"{guid.newguid()}.xlsx";
var fullpath = path + "\\" + filename;
var businessid = webhelper.getqueryint("businessid");
selectrule selectrule = new selectrule("v_app_business_model_detail", "is_hide", false);
selectrule.addcolumnwhere("disabled", false);
selectrule.addcolumnwhere("business_id", businessid);
selectrule.orderby = "order by order_by asc ";
list<app_business_model_detailmodel> list = _service.gsf.getdatatable(selectrule).tolistmodel<app_business_model_detailmodel>();
fileinfo file = new fileinfo(path.combine(path, filename));
using (filestream fss = new filestream(file.tostring(), filemode.create))
{
excelfile.copyto(fss);
fss.flush();
}
iworkbook wk = null;
string extension = system.io.path.getextension(fullpath);
filestream fs = new filestream(fullpath, filemode.open);
if (extension.equals(".xls"))
{
//把xls文件中的数据写入wk中
wk = new hssfworkbook(fs);
}
else
{
//把xlsx文件中的数据写入wk中
wk = new xssfworkbook(fs);
}
fs.close();
//读取当前表数据
isheet sheet = wk.getsheetat(0);
irow row = sheet.getrow(0); //读取当前行数据
string strjsonarrary = "";
for (int i = 1; i <= sheet.lastrownum; i++)
{
row = sheet.getrow(i); //读取当前行数据
if (row != null)
{
string strjson="";
//lastcellnum 是当前行的总列数
for (int j = 0; j < row.lastcellnum; j++)
{
//读取该行的第j列数据
string key = sheet.getrow(0).getcell(j).tostring();
var model = list.find(x => x.column_name == key);
string value = row.getcell(j).tostring();
var keyvalue = getjson(model, value);
if (keyvalue != "")
{
strjson += keyvalue;
}
}
if (strjson != "")
{
strjson ="{"+strjson.substring(0, strjson.length - 1)+"},";
strjsonarrary += strjson;
}
}
}
strjsonarrary = "["+strjsonarrary.substring(0, strjsonarrary.length - 1) + "]";
result.data = jarray.parse(strjsonarrary);
}
catch (exception e)
{
result.state = ajaxstate.error;
result.message = e.message;
}
return json(result);
}
6、导出部分(excel）
public actionresult downtemplet(int business_id,string tablename)
{
selectrule selectrule = new selectrule("v_app_business_model_detail", "is_hide", false);
selectrule.addcolumnwhere("disabled", false);
selectrule.addcolumnwhere("business_id", business_id);
selectrule.orderby = "order by order_by asc ";
list<app_business_model_detailmodel> list = _service.gsf.getdatatable(selectrule).tolistmodel<app_business_model_detailmodel>();
iworkbook workbook = new xssfworkbook();
isheet sheet = workbook.createsheet(tablename);
irow headrow = sheet.createrow(0);
headrow.height = 500;
for (int i = 0; i < list.count; i++)
{
icell cell = headrow.createcell(i);
cell.setcellvalue(gettitle(list[i].column_name));
}
var stream = new npoimemorystream();
workbook.write(stream);
stream.flush();
stream.position = 0;
return file(stream, "application/ms-excel", string.format("{0}.xlsx", tablename+"_模板"));
}