页面代码：
<form id="form1" enctype="multipart/form-data">
<div style="float:right">
<button type="button" class="btn btn-primary" onclick="$(‘#fileUpload‘).click()" id="reviewFile">浏览</button>
<button class="btn btn-primary" type="button" style="margin-left:5px;height:30px;" id="dataExport">批量导入</button>
<input type="button" class="btn btn-primary" style="margin-left:5px;height:30px;" id="downLoad" value="下载模板">
</div>
<div style="float:right;margin-top:5px">
<input id="fileUpload" name="fileUpload" type="file" style="display:none" />
<input id="fileText" type="text" class="form-control" disabled />
</div>
<script>
$("#fileUpload").change(function () {
$("#fileText").val($(this).val());
})
</script>
</form>
js代码：
//导入excel数据
$("#dataExport").click(function () {
var formData = new FormData($(‘form‘)[0]);
$.ajax({
url: ‘/BaseInfoPage/Upload‘,
type: ‘POST‘,
xhr: function () {
return $.ajaxSettings.xhr();
},
data: formData,
cache: false,
contentType: false,
processData: false,
success: function (data) {
if (data == "导入成功!") {
layer.msg(data, { icon: 1, time: 5000 }, function () {
location.reload(); //刷新父页面 第二个参数设置msg显示的时间长短
});
} else {
layer.msg(data, { icon: 0, time: 5000 }, function () {
return;
});
}
},
error: function (e) {
layer.msg(e, { icon: 0, time: 5000 }, function () {
return;
});
}
});
})
c#后台代码：
public string Upload(HttpPostedFileBase fileUpload)
{
if (fileUpload == null)
{
return "文件为空";
}
string fileExtension = Path.GetExtension(fileUpload.FileName);//获取文件名后缀
try
{
//判断文件类型
if (".xls" == fileExtension || ".xlsx" == fileExtension)
{
//将硬盘路径转化为服务器路径的文件流
//string fileName = Path.Combine(Request.MapPath("~/ExcelTemplate"), Path.GetFileName(fileUpload.FileName));
string fileName = fileUpload.FileName;
string filePath = "";
filePath = CSysCfg.exFilePath;
if (!Directory.Exists(filePath))
{
Directory.CreateDirectory(filePath);
}
//保存模板到服务器
fileUpload.SaveAs(filePath + "\\" + fileName);
//从NPOI读取到的Excel的数据，保存到excelTable里
DataTable excelTable = new DataTable();
excelTable = GetExcelDataTable(filePath + "\\" + fileName);//自定义方法
//把表的中文表头转换成数据库表中对应的英文
DataTable dbdata = new DataTable();
dbdata.Columns.Add("ltl_Id");
dbdata.Columns.Add("ltl_PlateId");
dbdata.Columns.Add("ltl_StarteTime");
dbdata.Columns.Add("ltl_EndTime");
for (int i = 0; i < excelTable.Rows.Count; i++)
{
DataRow dr = excelTable.Rows[i];
DataRow dr_ = dbdata.NewRow();
dr_["ltl_Id"] = dr["申请编号"];
dr_["ltl_PlateId"] = dr["车牌号码"];
dr_["ltl_StarteTime"] = dr["开始日期"];
dr_["ltl_EndTime"] = dr["结束日期"];
dbdata.Rows.Add(dr_);
}
RemoveEmpty(dbdata);//自定义方法
//获取连接字符串，调用批量插入数据库的方法 需更改web.config添加配置
string constr = System.Configuration.ConfigurationManager.AppSettings["exportData"];
SqlBulkCopyByDatatable(constr, "LargeTransportLicense", dbdata);//自定义方法(连接字符串，表名，数据)
return "导入成功!";
}
else
{
return "只可以选择Excel文件!";
}
}
catch
{
return "导入失败!";
}
}
// 从Excel中获取数据到DataTable
public static DataTable GetExcelDataTable(string filePath)
{
IWorkbook Workbook;
DataTable table = new DataTable();
try
{
using (FileStream fileStream = new FileStream(filePath, FileMode.Open, FileAccess.Read, FileShare.ReadWrite))
{
//XSSFWorkbook 适用XLSX格式，HSSFWorkbook 适用XLS格式
string fileExt = Path.GetExtension(filePath).ToLower();
if (fileExt == ".xls")
{
Workbook = new HSSFWorkbook(fileStream);
}
else if (fileExt == ".xlsx")
{
Workbook = new XSSFWorkbook(fileStream);
}
else
{
Workbook = null;
}
}
//定位在第一个sheet
ISheet sheet = Workbook.GetSheetAt(0);
//第一行为标题行
IRow headerRow = sheet.GetRow(1);
int cellCount = headerRow.LastCellNum;// 是当前行的总列数
int rowCount = sheet.LastRowNum;////LastRowNum 是当前表的总行数-1（注意）
//循环添加标题列
for (int i = headerRow.FirstCellNum; i < cellCount; i++)
{
DataColumn column = new DataColumn(headerRow.GetCell(i).StringCellValue);
table.Columns.Add(column);
}
List<string> regionName = new List<string>();
//数据
for (int i = (sheet.FirstRowNum + 2); i <= rowCount; i++)
{
IRow row = sheet.GetRow(i);
DataRow dataRow = table.NewRow();
if (row != null)
{
for (int j = row.FirstCellNum; j < cellCount; j++)
{
if (row.GetCell(j) != null)
{
dataRow[j] = GetCellValue2(row.GetCell(j));
}
}
}
table.Rows.Add(dataRow);
}
}
catch (Exception ex)
{
throw ex;
}
return table;
}
//数据类型判断 方式一
private static string GetCellValue(NPOI.SS.UserModel.ICell cell)
{
if (cell == null)
{
return string.Empty;
}
else
{
switch (cell.CellType)
{
case CellType.Blank:
return string.Empty;
case CellType.Boolean:
return cell.BooleanCellValue.ToString();
case CellType.Error:
return cell.ErrorCellValue.ToString();
case CellType.Numeric://数值
case CellType.Unknown:
default:
return cell.ToString();
case CellType.String:
return cell.StringCellValue;
case CellType.Formula://公式
try
{
HSSFFormulaEvaluator e = new HSSFFormulaEvaluator(cell.Sheet.Workbook);
e.EvaluateInCell(cell);
return cell.ToString();
}
catch
{
return cell.NumericCellValue.ToString();
}
}
}
}
//数据类型判断，并设置为对应的数据类型 方式二
public static object GetCellValue2(NPOI.SS.UserModel.ICell cell)
{
object value = null;
if (cell == null)
{
value = 0;
}
try
{
if (cell.CellType != CellType.Blank)
{
switch (cell.CellType)
{
case CellType.Blank:
value = string.Empty;
break;
case CellType.Numeric:
// 日期
if (DateUtil.IsCellDateFormatted(cell))
{
value = cell.DateCellValue;
}
else
{
// 数值
value = cell.NumericCellValue;
}
break;
case CellType.Boolean:
// Boolean type
value = cell.BooleanCellValue;
break;
case CellType.Formula:
value = cell.CellFormula;
break;
default:
// String type
value = cell.StringCellValue;
break;
}
}
else
{
value = 0;
}
}
catch (Exception)
{
value = 0;
}
return value;
}
/// <summary>
/// 大数据插入
/// </summary>
/// <param name="connectionString">目标库连接</param>
/// <param name="TableName">目标表</param>
/// <param name="dtSelect">来源数据</param>
public static void SqlBulkCopyByDatatable(string connectionString, string TableName, DataTable dtSelect)
{
using (SqlConnection conn = new SqlConnection(connectionString))
{
using (SqlBulkCopy sqlbulkcopy = new SqlBulkCopy(connectionString, SqlBulkCopyOptions.UseInternalTransaction))
{
try
{
sqlbulkcopy.DestinationTableName = TableName;
sqlbulkcopy.BatchSize = 20000;
sqlbulkcopy.BulkCopyTimeout = 0;//不限时间
for (int i = 0; i < dtSelect.Columns.Count; i++)
{
sqlbulkcopy.ColumnMappings.Add(dtSelect.Columns[i].ColumnName, dtSelect.Columns[i].ColumnName);
}
sqlbulkcopy.WriteToServer(dtSelect);
}
catch (System.Exception ex)
{
throw ex;
}
}
}
}
//在导入Excel数据的时候，有时候会有空行，用RemoveEmpty方法去空
protected void RemoveEmpty(DataTable dt)
{
List<DataRow> removelist = new List<DataRow>();
for (int i = 0; i < dt.Rows.Count; i++)
{
bool IsNull = true;
for (int j = 0; j < dt.Columns.Count; j++)
{
if (!string.IsNullOrEmpty(dt.Rows[i][j].ToString().Trim()))
{
IsNull = false;
}
}
if (IsNull)
{
removelist.Add(dt.Rows[i]);
}
}
for (int i = 0; i < removelist.Count; i++)
{
dt.Rows.Remove(removelist[i]);
}
}
原文地址：https://www.cnblogs.com/-lile/p/11358359.html
时间： 2024-08-01 09:33:09