故事：用户在页面上传一个excel文件，程序把excel里的内容入库。
技术方案：保存文件在服务器，jquey Ajax 异步读取文件中的记录到数据库，在页面实时刷新导入情况
页面前端
<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="ImportUsers.aspx.cs" Inherits="Community.WebUI.zsclient.ImportUsers" %> <!DOCTYPE html> <html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title></title>
<script type="text/javascript" src="js/jquery.min.js"></script>
<script type="text/javascript">
function importUserOnce(f, r) {
$.ajax({
url: "ImportUsers.aspx/ImportUserOnce", type: "POST", contentType: "application/json;charset=utf-8", data: "{ 'f': '" + f + "' ,'r':'" + r + "'}", dataType: "json", cache: false,
success: function (msg) {
var m = msg.d.split(',');
var rowNumber = m[0];
var rowCount = m[1];
$("#<%=txtResult.ClientID%>").append(m[2]);
if (rowNumber != rowCount) {
$("#spanMsg").text("正在导入用户，已导入"+rowNumber+"用户，根据用户多少可能需要一段时间，请您耐心等候……");
importUserOnce(f, rowNumber);
}
else {
$("#<%=btnSubmitExcel.ClientID%>").removeAttr("disabled");
$("#spanMsg").text("完成，总用户数"+rowCount);
}
},
error: function (request, err,ex) {
$("#spanMsg").text(err);
$("#<%=btnSubmitExcel.ClientID%>").removeAttr("disabled");
}
})
return;
}
</script>
</head>
<body>
<form id="form1" runat="server">
<div> <table style="margin-left: auto; margin-right: auto;">
<tr>
<th>从Excel导入用户</th>
</tr>
<tr>
<td>
<asp:FileUpload ID="FileUpload1" runat="server" /><asp:Button ID="btnSubmitExcel" runat="server" Text="确定" OnClick="btnSubmitExcel_Click" />
<input runat="server" id="txtFName" type="hidden" />
<span id="spanMsg"></span>
</td>
</tr>
</table>
<div style="width: 800px; height: 600px; margin-left: auto; margin-right: auto;">
<div id="txtResult" runat="server" style="width: 800px; height: 600px; overflow: scroll; border: 1px solid #ccc;">
</div>
</div> </div>
</form>
<script type="text/javascript">
var fvalue = "";
var int = self.setInterval("clock()", 50)
function clock() {
fvalue = $("#<%=txtFName.ClientID%>").val();
if (fvalue != "") {
int = window.clearInterval(int);
importUserOnce(fvalue, 0);
$("#<%=btnSubmitExcel.ClientID%>").attr("disabled", "disabled");
$("#spanMsg").text("正在导入用户，根据用户多少可能需要一段时间，请您耐心等候……");
}
}
</script>
</body>
</html>
后台代码
[WebMethod]
public static string ImportUserOnce(string f, string r)
{
string fileName = AppDomain.CurrentDomain.BaseDirectory + "/zsclient/" + f;
if (!System.IO.File.Exists(fileName))
{
return fileName + "0,0,不存在";
}
int rowIndex = ;
if (!int.TryParse(r, out rowIndex) || rowIndex < )
{
return "0,0,rowIndex格式错误";
} FileStream stream = File.OpenRead(fileName);
IWorkbook workbook;
if (fileName.EndsWith("xls"))
{
workbook = new HSSFWorkbook(stream);//从流内容创建Workbook对象
}
else
{
workbook = new XSSFWorkbook(stream);//从流内容创建Workbook对象
}
ISheet sheet = workbook.GetSheetAt();//获取第一个工作表
int rowCount = sheet.LastRowNum; string strStatus = "";
if (rowIndex <= rowCount)
{ int userNum = ; while (rowIndex < rowCount && userNum < )
{
if (sheet.GetRow(rowIndex).GetCell() == null || sheet.GetRow(rowIndex).GetCell() == null)
{
rowIndex++;
userNum++;
continue;
}
UserInfo objUser = new UserInfo()
{
Username = sheet.GetRow(rowIndex).GetCell().ToString();
Password = sheet.GetRow(rowIndex).GetCell().ToString(), };
UserCreateStatus userCreateStatus = CreateUser(ref objUser);
if (userCreateStatus != UserCreateStatus.Success)
{ switch (userCreateStatus)
{
case UserCreateStatus.InvalidPassword:
strStatus += "用户" + strName + "密码不符合要求，密码长度6-20位\r\n<br/>";
break;
case UserCreateStatus.UserAlreadyRegistered:
strStatus += "用户名" + strName + "已存在\r\n<br/>";
break;
case UserCreateStatus.UsernameAlreadyExists:
strStatus += "用户名" + strName + "已存在\r\n<br/>";
break;
case UserCreateStatus.InvalidUserName:
strStatus += "用户名" + strName + "不符合要求，4-20位字母或数字\r\n<br/>";
break;
default:
strStatus += UserController.GetUserCreateStatus(userCreateStatus);
break;
}
}
else
{
strStatus += strName + "导入成功\r\n<br/>";
}
userNum++;
rowIndex++;
}
}
return rowIndex.ToString() + "," + rowCount.ToString() + "," + strStatus;
}
读取excel文件采用NPOI
using NPOI.HSSF.UserModel;
using NPOI.SS.UserModel;
using NPOI.XSSF.UserModel;
提供一个OLEDB方法
private static DataSet GetDataFromExcel(string fileName)
{
string connStr;
if (fileName.EndsWith(".xls"))
connStr = "Provider=Microsoft.Jet.OLEDB.4.0;" + "Data Source=" + fileName + ";" + ";Extended Properties=\"Excel 8.0;HDR=YES;IMEX=1\"";
else
connStr = "Provider=Microsoft.ACE.OLEDB.12.0;" + "Data Source=" + fileName + ";" + ";Extended Properties=\"Excel 12.0;HDR=YES;IMEX=1\""; string sql_F = "Select * FROM [{0}]"; OleDbConnection conn = null;
OleDbDataAdapter da = null;
DataTable dtSheetName = null; DataSet ds = new DataSet();
try
{
// 初始化连接，并打开
conn = new OleDbConnection(connStr);
conn.Open(); // 获取数据源的表定义元数据
string SheetName = "";
dtSheetName = conn.GetOleDbSchemaTable(OleDbSchemaGuid.Tables, new object[] { null, null, null, "TABLE" }); // 初始化适配器
da = new OleDbDataAdapter();
for (int i = ; i < dtSheetName.Rows.Count; i++)
{
SheetName = (string)dtSheetName.Rows[i]["TABLE_NAME"]; if (SheetName.Contains("$") && !SheetName.Replace("'", "").EndsWith("$"))
{
continue;
} da.SelectCommand = new OleDbCommand(String.Format(sql_F, SheetName), conn);
DataSet dsItem = new DataSet();
da.Fill(dsItem, SheetName); ds.Tables.Add(dsItem.Tables[].Copy());
}
}
catch (Exception ex)
{ }
finally
{
// 关闭连接
if (conn.State == ConnectionState.Open)
{
conn.Close();
da.Dispose();
conn.Dispose();
}
}
return ds;
}