ASP.NET导入导出Excel方法大全

2022-03-01 07:54:11

本文介绍下，C#实现的可以导出与导入excel的代码一例，有需要的朋友，参考下吧。

C#实现导出与导入excel。
代码1：

复制代码代码示例:
#region 导出Excel
/// <summary>
/// 导出Excel
/// </summary>
/// <param name="page">请求的页面this</param>
/// <param name="dataTable">导出的数据源</param>
/// <param name="fileName">保存文件名称</param>
/// <returns>布尔值</returns>
public bool ExportExcel(Page page, DataTable dataTable, string fileName)
{
    try
    {
        HttpContext.Current.Response.Clear();
        HttpContext.Current.Response.Buffer = true;
        HttpContext.Current.Response.ContentType = "application/vnd.ms-excel.numberformat:@";
        page.EnableViewState = false;
        HttpContext.Current.Response.Charset = "UTF-8";
        HttpContext.Current.Response.ContentEncoding = System.Text.Encoding.GetEncoding("gb2312");//设置输出流为简体中文
        HttpContext.Current.Response.AppendHeader("Content-Disposition", "attachment;filename=" + fileName + ".xls");
        //输出列名
        for (int i = 0; i < dataTable.Columns.Count; i++)
          HttpContext.Current.Response.Write(dataTable.Columns[i].ColumnName + "\t");
          HttpContext.Current.Response.Write("\r\n");
          //输出数据
        for (int i = 0; i < dataTable.Rows.Count; i++)
        {
for (int j = 0; j < dataTable.Columns.Count; j++)
{
    HttpContext.Current.Response.Write(dataTable.Rows[i][j].ToString() + "\t");
}
HttpContext.Current.Response.Write("\r\n");
        }
        //输出当前缓存内容
        //HttpContext.Current.Response.Flush();
        HttpContext.Current.Response.End();
        return true;
    }
    catch
    {
        return false;
    }
}
#endregion

代码2

代码示例:
#region 导出Excel 自定义格式
/// <summary>
/// 导出Excel
/// 1.文本：vnd.ms-excel.numberformat:@
/// 2.日期：vnd.ms-excel.numberformat:yyyy/mm/dd
/// 3.数字：vnd.ms-excel.numberformat:#,##0.00
/// 4.货币：vnd.ms-excel.numberformat:￥#,##0.00
/// 5.百分比：vnd.ms-excel.numberformat: #0.00%
/// </summary>
/// <param name="fileName"></param>
/// <param name="dt"></param>
/// <returns></returns>
public bool Export(string fileName, DataTable dt)
{
   try
   {
       HttpResponse resp;
       resp = System.Web.HttpContext.Current.Response;
       resp.ContentEncoding = System.Text.Encoding.GetEncoding("utf-8");
       resp.AppendHeader("Content-Disposition", "attachment;filename=" + fileName + ".xls");
       resp.AppendHeader("Content-Type", "application/ms-excel");

       StringBuilder colHeaders = new StringBuilder();
       StringBuilder ls_item = new StringBuilder();
       DataRow[] myRow = dt.Select();
       int cl = dt.Columns.Count;

       colHeaders.Append(" <html><head> \n ");
       colHeaders.Append(" <meta http-equiv=‘Content-Type‘ content=‘text/html; charset=gb2312‘ /> \n ");
       colHeaders.Append(" </head> \n ");
       colHeaders.Append(" <body> \n ");
       colHeaders.Append(" <table border=‘1‘> ");
       colHeaders.Append(" <tr> ");
       //输出列名
       for (int i = 0; i < dt.Columns.Count; i++)
colHeaders.Append("<td style=‘background-color:#CCCCCC‘>" + dt.Columns[i].ColumnName + "</td>");
       colHeaders.Append("</tr> ");
       resp.Write(colHeaders.ToString());
       foreach (DataRow row in myRow)
       {
ls_item.Append("<tr>");
for (int i = 0; i < cl; i++)
{
   if (i == (cl - 1))
   {
       ls_item.Append("<td style=‘vnd.ms-excel.numberformat:@ ‘>" + row[i].ToString() + "</td>" + "\n");
   }
   else
   {
       ls_item.Append("<td style= ‘vnd.ms-excel.numberformat:@ ‘>" + row[i].ToString() + "</td>");
   }
}
ls_item.Append("</tr>");
       }
       ls_item.Append(" </table> \n ");
       ls_item.Append(" </body> \n ");
       ls_item.Append(" </html>");
       resp.Write(ls_item.ToString());
       resp.End();
       return true;
   }
   catch
   {
       return false;
   }
}
#endregion
代码3

代码示例:
#region 导入Excel
public string ImportExcel(string[] list, string filePath)
{
        string isXls = System.IO.Path.GetExtension(filePath).ToLower(); //System.IO.Path.GetExtension获得文件的扩展名
        if (isXls != ".xls")
        return "请选择Excel文件导入！";
        DataSet ds = ExecleDataSet(filePath); //调用自定义方法
        DataRow[] dr = ds.Tables[0].Select(); //定义一个DataRow数组
        int rowsnum = ds.Tables[0].Rows.Count;
        if (ds.Tables[0].Rows.Count == 0)
        return "Excel无数据！";
        return "";
    }

    //OleDB连接读取Excel中数据
    public DataSet ExecleDataSet(string filePath)
    {
        string OleDbConnection = "Provider=Microsoft.Jet.OleDb.4.0;" + "data source=" + filePath + ";Extended Properties=‘Excel 8.0; HDR=YES; IMEX=1‘";
        OleDbConnection conn = new OleDbConnection(OleDbConnection);
        conn.Open();
        DataSet ds = new DataSet();
        OleDbDataAdapter odda = new OleDbDataAdapter("select * from [Sheet1$]", conn);
        odda.Fill(ds);
        conn.Close();
        return ds;
}
#endregion
转载自：http://www.hello-code.com/blog/asp.net/201401/2645.html

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