本文最后更新于 560 天前，其中的信息可能已经有所发展或是发生改变。
1、前台页面
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
</head>
<style>
#loading {
position: fixed;
top: 50%;
transform: translate(-50%, -50%);
left: 50%;
opacity: .8;
-ms-flex-pack: center !important;
justify-content: center !important;
display: none;
}
.spinner {
display: inline-block;
width: 2rem;
height: 2rem;
vertical-align: text-bottom;
border: 0.25em solid currentColor;
border-right-color: transparent;
border-radius: 50%;
-webkit-animation: spinner .75s linear infinite;
animation: spinner .75s linear infinite;
}
@keyframes spinner {
to {
transform: rotate(360deg);
}
}
</style>
<body>
<button type="button" onclick="$('#btn').click()">upload</button>
<input type="file" style="display: none;" id="btn" />
<div id="loading">
<div class="spinner">
<span></span>
</div>
</div>
</body>
<script src="./jquery-3.3.1.min.js"></script>
<script>
$('#btn').change(function (e) {
let formData = new FormData();
formData.append('files', e.target.files[0]);
formData.append('userId', 'xiaoming');
$.ajax({
type: 'POST',
url: 'http://localhost:3000/api/upload',
cache: false,
data: formData,
contentType: false, // 不设置数据类型
processData: false, // 将数据转换成对象，不对数据做处理
beforeSend: function (result) {
// 数据加载前，显示loading
if (result.readyState == 0) {
$("body").attr("disabled", true);
$("body").css("opacity", '.5');
$("#loading").show();
}
},
success: function (result) {
console.log(result.Message);
},
complete: function (result) {
// 数据加载后，隐藏loading
if (result.status == 200) {
$("body").attr("disabled", false);
$("body").css("opacity", '1');
$("#loading").hide();
}
$('#btn').val(''); // 文件导入完成后就清空
},
error: function (error) {
console.log(error)
}
})
})
</script>
</html>2、后台接口设计
using Ascentn.Workflow.Base;
using Medalsoft.Workflow.Resource.CommonUtil;
using System;
using System.Data;
using System.Data.SqlClient;
using System.IO;
using System.Web;
using System.Web.Http;
namespace Medalsoft.Workflow.Resource.Controllers
{
[RoutePrefix("api/upload")]
public class UploadController : ApiController
{
string connstr = AgilePointUtil.CreateSQLConnectInstance(); //:获取数据库连接字符串
/// <summary>
/// 导入xlsx文件
/// </summary>
/// <returns></returns>
[Route("ImportFile"), HttpPost]
public ResultData ImportFile()
{
using (var w = new LimitedConcurrency())
{
string fileName = "";
Stream fileStream = null;
var request = System.Web.HttpContext.Current.Request;
var formData = request.Form;
string userName = formData["userId"];
string clearOriginalTableSql = $@"TRUNCATE TABLE UserInfo";
string nowTime = DateTime.Now.ToString("yyyyMMddHHmmss"); // 获取当前时间
string createBackupTableSql = $@"SELECT * INTO UserInfobackup{nowTime} FROM UserInfo";
HttpFileCollection files = HttpContext.Current.Request.Files;
SqlHelper.ExecteNonQuery(connstr, CommandType.Text, createBackupTableSql, null); // 根据时间创建备份表
SqlHelper.ExecteNonQuery(connstr, CommandType.Text, clearOriginalTableSql, null); // 清空原数据表
SqlConnection myConnection = new SqlConnection(connstr);
myConnection.Open();
//启动一个事务
SqlTransaction myTrans = myConnection.BeginTransaction();
//为事务创建一个命令
SqlCommand myCommand = new SqlCommand();
myCommand.Connection = myConnection;
myCommand.Transaction = myTrans;
// 判断上传的是否是xlsx文件
foreach (string key in files.AllKeys)
{
HttpPostedFile file = files[key];
if (string.IsNullOrEmpty(file.FileName) == false)
{
fileName = file.FileName;
fileStream = file.InputStream;
}
else
{
return new ResultData { IsError = true, Message = "未获取到Excel数据" };
}
}
if (Path.GetExtension(fileName).ToLower() != ".xls" && Path.GetExtension(fileName).ToLower() != ".xlsx")
{
return new ResultData { IsError = true, Message = "请上传excel文件" };
}
// 读取文件
try
{
// 获取导入的xlsx文件数据
DataTable data = ExcelHelper.ImportStream(fileStream, fileName);
foreach (DataRow itemRows in data.Rows)
{
// string description = itemRows.ItemArray[1].ToString();
// string description = itemRows["UserDescription"].ToString();
string description = HandleString(itemRows["UserDescription"].ToString());
string userSex = itemRows["UserSex"].ToString();
string userAge = itemRows["UserAge"].ToString();
if (StringIsEmpty(userName))
{
return new ResultData { IsError = true, Message = "UserName不能为空" };
}
if (StringIsEmpty(description))
{
return new ResultData { IsError = true, Message = "UserDescription不能为空" };
}
if (StringIsEmpty(userSex))
{
return new ResultData { IsError = true, Message = "UserSex不能为空" };
}
if (!IsNumber(userAge))
{
return new ResultData { IsError = true, Message = "UserAge不是数字类型" };
}
string sql = $@"INSERT INTO UserInfo(
[ID],
[CREATED_DATE],
[UserName],
[UserSex],
[UserAge]
[UserDescription] VALUES (
NEWID(),
GETDATE(),
'{userName}',
'{userSex}',
'{userAge}',
'{description}')";
myCommand.CommandText = sql;
myCommand.ExecuteNonQuery();
// SqlHelper.ExecteNonQuery(connstr, CommandType.Text, sql, null);
}
myTrans.Commit();
return new ResultData { IsError = false, Message = "数据导入成功" };
}
catch (Exception ex)
{
myTrans.Rollback(); //遇到错误回滚
throw ex;
}
}
}
// 判断字符串
public bool StringIsEmpty(string str)
{
if (string.IsNullOrEmpty(str)) // 是空的返回true否则返回false
{
return true;
}
return false;
}
// 判断数字
public bool IsNumber(string number) // 是数字返回true否则返回false
{
decimal num = 0;
bool n = decimal.TryParse(number, out num);
if (!string.IsNullOrEmpty(number) && n)
{
return true;
}
return false;
}
public string HandleString(string content)
{
if (content.Contains("'"))
{
content = content.Replace("'", "''");
}
return content;
}
public class ResultData
{
public bool IsError { get; set; }
public string Message { get; set; }
}
}
}