【asp.net】asp.net实现上传Excel文件并读取数据

#前台代码:使用服务端控件实现上传

     <form id="form1" runat="server">
<div>
<asp:FileUpload ID="ExcelFileUpload" runat="server" />
<asp:Button ID="UploadBtn" runat="server" Text="确定上传" OnClick="UploadBtn_Click" />
</div>
</form>

#服务端代码:

 protected void UploadBtn_Click(object sender, EventArgs e)
{
if (ExcelFileUpload.HasFile == false)//HasFile用来检查FileUpload是否有文件
{
Response.Write("<script>alert('请您选择Excel文件')</script> ");
return;//当无文件时,返回
}
string IsXls = Path.GetExtension(ExcelFileUpload.FileName).ToString().ToLower();//System.IO.Path.GetExtension获得文件的扩展名
if (IsXls != ".xlsx" && IsXls != ".xls")
{
Response.Write(ExcelFileUpload.FileName);
Response.Write("<script>alert('只可以选择Excel文件')</script>");
return;//当选择的不是Excel文件时,返回
} string filename = ExcelFileUpload.FileName;//获取Execle文件名
string savePath = Server.MapPath(("UploadExcel\\") + filename);//Server.MapPath 服务器上的指定虚拟路径相对应的物理文件路径
//savePath ="D:\vsproject\Projects\exceltestweb\exceltestweb\uploadfiles\test.xls"
//Response.Write(savePath);
DataTable ds = new DataTable();
ExcelFileUpload.SaveAs(savePath);//将文件保存到指定路径 DataTable dt = GetExcelDatatable(savePath);//读取excel数据
List<RegNumInfo> regList = ConvertDtToInfo(dt);//将datatable转为list
File.Delete(savePath);//删除文件 Response.Write("<script>alert('上传文件读取数据成功!');</script>");
}
/// <summary>
/// 从excel文件中读取数据
/// </summary>
/// <param name="fileUrl">实体文件的存储路径</param>
/// <returns></returns>
private static DataTable GetExcelDatatable(string fileUrl)
{
//支持.xls和.xlsx,即包括office2010等版本的;HDR=Yes代表第一行是标题,不是数据;
string cmdText = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + fileUrl + "; Extended Properties=\"Excel 12.0;HDR=Yes\"";
System.Data.DataTable dt = null;
//建立连接
OleDbConnection conn = new OleDbConnection(cmdText);
try
{
//打开连接
if (conn.State == ConnectionState.Broken || conn.State == ConnectionState.Closed)
{
conn.Open();
} System.Data.DataTable schemaTable = conn.GetOleDbSchemaTable(OleDbSchemaGuid.Tables, null);
string strSql = "select * from [Sheet1$]"; //这里指定表明为Sheet1,如果修改过表单的名称,请使用修改后的名称
OleDbDataAdapter da = new OleDbDataAdapter(strSql, conn);
DataSet ds = new DataSet();
da.Fill(ds);
dt = ds.Tables[]; ;
return dt;
}
catch (Exception exc)
{
throw exc;
}
finally
{
conn.Close();
conn.Dispose();
}
}
/// <summary>
/// 将datatable转换为list集合
/// </summary>
/// <param name="dt">DataTable</param>
/// <returns></returns>
private static List<RegNumInfo> ConvertDtToInfo(DataTable dt)
{
List<RegNumInfo> list = new List<RegNumInfo>();
if (dt.Rows.Count > )
{
foreach (DataRow item in dt.Rows)
{
RegNumInfo info = new RegNumInfo();
info.RegNum = item[].ToString();
info.Name = item[].ToString();
info.Period = item[].ToString();
info.Remark = item[].ToString();
list.Add(info);
}
}
return list;
}
 public class RegNumInfo
{
public string RegNum { get; set; }
public string Name { get; set; }
public string Period { get; set; }
public string Remark { get; set; }
}

#注意:出现“未在本地计算机上注册“microsoft.ACE.oledb.12.0”提供程序” 的报错的解决方案

  1、因为读取excel文件使用的是OleDb,如果服务器没有安装office,需要安装数据访问组件(AccessDatabaseEngine);

    *适用于office2010的

    Microsoft Access Database Engine 2010 Redistributable

  2、在IIS应用程序池中,设置“”启用兼容32位应用程序”;

解决方案具体可参考这篇文章:https://www.cnblogs.com/willingtolove/p/9630485.html

 

#参考:

https://blog.csdn.net/eagle_or_snail/article/details/82748226

https://www.cnblogs.com/willingtolove/p/9630485.html

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