ASP.NET 2.0导出到Excel时保留换行的方法-控件新闻-慧都网

ASP.NET 2.0导出到Excel时保留换行的方法

转帖|其它|编辑：郝浩|2008-12-23 14:26:20.000|阅读 1442 次

概述：ASP.NET 2.0导出到Excel时保留换行的方法

文章关键字：|ASP.NET|导出|Excel|换行|HTML|XML|

由于Excel毕竟不是 HTML，它有自己的样式标准，在Excel 中，实现换行的方法是：

<br style='mso-data-placement:same-cell;'/>
完整代码：

<%@ Page Language="C#" Trace="false" AutoEventWireup="true" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

protected void Button1_Click(object sender, EventArgs e)
{
    System.Web.HttpContext curContext = System.Web.HttpContext.Current;
    // IO用于导出并返回excel文件
    System.IO.StringWriter strWriter = null;
    System.Web.UI.HtmlTextWriter htmlWriter = null;

    // 设置编码和附件格式
    HttpContext.Current.Response.Clear();
    HttpContext.Current.Response.Buffer = true;
    HttpContext.Current.Response.AddHeader("content-disposition", string.Format("attachment; filename={0}", "aaa.xls"));

    curContext.Response.ContentType = "application/vnd.ms-excel";
    curContext.Response.ContentEncoding = System.Text.Encoding.GetEncoding("GB18030");
    curContext.Response.Charset = "";

    // 导出excel文件
    strWriter = new System.IO.StringWriter();
    htmlWriter = new System.Web.UI.HtmlTextWriter(strWriter);
    htmlWriter.WriteLine("标题");

    // 返回客户端
    GridView1.RenderControl(htmlWriter);
    curContext.Response.Write(strWriter.ToString().Replace("<br/>", "<br style='mso-data-placement:same-cell;'/> "));
    curContext.Response.End();
}

protected void Page_Load(object sender, EventArgs e)
{
    if (!Page.IsPostBack)
    {
      GridView1.DataSource = CreateDataSourceByXianhuiMeng();
      GridView1.DataBind();
    }
}

System.Data.DataView CreateDataSourceByXianhuiMeng()
{
    System.Data.DataTable dt = new System.Data.DataTable();
    System.Data.DataRow dr;
    dt.Columns.Add(new System.Data.DataColumn("学生班级", typeof(System.String)));
    dt.Columns.Add(new System.Data.DataColumn("学生姓名", typeof(System.String)));
    dt.Columns.Add(new System.Data.DataColumn("语文", typeof(System.Decimal)));
    dt.Columns.Add(new System.Data.DataColumn("数学", typeof(System.Decimal)));
    dt.Columns.Add(new System.Data.DataColumn("英语", typeof(System.Decimal)));
    dt.Columns.Add(new System.Data.DataColumn("计算机", typeof(System.Decimal)));

    for (int i = 0; i < 8; i++)
    {
      System.Random rd = new System.Random(Environment.TickCount * i); ;
      dr = dt.NewRow();
      dr[0] = "班级" + i.ToString();
      dr[1] = "学生姓名：孟子E章" + i.ToString() + "<br/>所在班级：" + "班级" + i.ToString();
      dr[2] = System.Math.Round(rd.NextDouble() * 100, 2);
      dr[3] = System.Math.Round(rd.NextDouble() * 100, 2);
      dr[4] = System.Math.Round(rd.NextDouble() * 100, 2);
      dr[5] = System.Math.Round(rd.NextDouble() * 100, 2);
      dt.Rows.Add(dr);
    }
    System.Data.DataView dv = new System.Data.DataView(dt);
    return dv;
}
public override void VerifyRenderingInServerForm(Control control)
{ }
</script>