.net 导出Excel,设置Excel页眉及单元格换行方法

/// <summary>
/// 从GridView导出
/// </summary>
/// <param name="ds">导出的数据集</param>
/// <param name="path">导出的路径</param>
/// <returns></returns>
public string Export(DataSet ds, string path)
{
GridView GV = new GridView();//实例化一个Gridview
try
{
GV.DataSource = ds;
GV.AllowPaging = false;//禁止分页
GV.DataBind();//绑定数据
// GV.HeaderStyle.Height = 30;//设置表头的行高
GV.HeaderStyle.Font.Size = 10;
//GV.HeaderStyle.BackColor = System.Drawing.Color.Gray;//设置表头的背景色
// GV.HeaderStyle.Font.Bold = true;//设置表头加粗
GV.HeaderStyle.HorizontalAlign = HorizontalAlign.Center;//设置表头居中
// GV.BackColor = System.Drawing.Color.FromArgb(255, 255, 153);//设置背景色
GV.HorizontalAlign = HorizontalAlign.Center;//设置居中
GV.RowStyle.HorizontalAlign = HorizontalAlign.Center;//设置居中
GV.RowStyle.Font.Size = 10;
GV.HeaderRow.Cells[1].Width = 140;//部门
if (drpType.SelectedValue == "1")
{
GV.HeaderRow.Cells[5].Width = 90;
GV.HeaderRow.Cells[6].Width = 90;
GV.HeaderRow.Cells[8].Width = 90;
GV.HeaderRow.Cells[9].Width = 180;
}
if (drpType.SelectedValue == "2")
{
GV.HeaderRow.Cells[4].Width = 70;
GV.HeaderRow.Cells[5].Width = 85;
GV.HeaderRow.Cells[6].Width = 90;
}
if (drpType.SelectedValue == "3")
{
GV.HeaderRow.Cells[5].Width = 90;
GV.HeaderRow.Cells[6].Width = 90;
GV.HeaderRow.Cells[8].Width = 90;
GV.HeaderRow.Cells[7].Width = 100;
GV.HeaderRow.Cells[9].Width = 180;
}
if (drpType.SelectedValue == "4")
{
GV.HeaderRow.Cells[4].Width = 90;
GV.HeaderRow.Cells[5].Width = 90;
GV.HeaderRow.Cells[8].Width = 90;
GV.HeaderRow.Cells[6].Width = 65;
GV.HeaderRow.Cells[9].Width = 280;
}
if (drpType.SelectedValue == "5")
{
GV.HeaderRow.Cells[1].Width = 250;
}
OutPutExcel(GV, Page, path);
return "导出成功！";
}
catch (Exception exc)
{
return exc.Message;//捕捉异常信息
}
}

#region 将控件内容导出到excel
/// <summary>
/// 将控件内容导出到excel
/// </summary>
/// <param name="ExportObj">需要导出内容的控件</param>
/// <param name="page">提供Reponse事件的page</param>
/// <param name="fileName">导出的文件名</param>
public void OutPutExcel(System.Web.UI.Control ExportObj, System.Web.UI.Page page, string fileName)
{
//定义文档类型、字符编码

page.Response.Clear();
page.Response.Buffer = true;
page.Response.Charset = "GB2312";
//下面这行很重要， attachment 参数表示作为附件下载，您可以改成 online在线打开
//filename=FileFlow.xls 指定输出文件的名称，注意其扩展名和指定文件类型相符，可以为：.doc 　　 .xls 　　 .txt 　　.htm
page.Response.AppendHeader("Content-Disposition", "attachment;filename=" + System.Web.HttpUtility.UrlEncode(fileName, System.Text.Encoding.UTF8));
page.Response.ContentEncoding = System.Text.Encoding.GetEncoding("GB2312");
//Response.ContentType指定文件类型 可以为application/ms-excel、application/ms-word、application/ms-txt、application/ms-html 或其他浏览器可直接支持文档

page.Response.ContentType = "application/ms-excel";

System.Globalization.CultureInfo cult = new System.Globalization.CultureInfo("zh-CN", true);

//　定义一个输入流
System.IO.StringWriter oStringWriter = new System.IO.StringWriter(cult);
System.Web.UI.HtmlTextWriter oHtmlTextWriter = new System.Web.UI.HtmlTextWriter(oStringWriter);

//设置excel页眉,格式如下:
//<style><!--@page{mso-header-data:"&L&10【请假单】   导出时段\:从 2012\/09\/11 16\:22  到  2012\/09\/12 16\:22\;\000A当前时间\:2012\/09\/21 16\:26\:33";}--></style>
//&L&10:靠左,10号字体
//\000A:换行
StringBuilder printHead = new StringBuilder();
printHead.Append("<style><!--@page{mso-header-data:\"&L&10");
printHead.Append(Convert.ToString(ViewState["jdType"]).Replace("/", "\\/").Replace(":", "\\:").Replace(";", "\\;")+"\";");
printHead .Append("}--></style>");
oHtmlTextWriter.WriteLine("<meta http-equiv=\"Content-Type\" content=\"text/html;charset=GB2312\">");
oHtmlTextWriter.WriteLine(printHead.ToString());

ExportObj.RenderControl(oHtmlTextWriter);

//excel单元格换行,先将要换行的单元格数据加入标识字符比如"<br>",然后输出时将<br>替换成<br style='mso-data-placement:same-cell;'/>
page.Response.Write(oStringWriter.ToString().Replace("<br>", "<br style='mso-data-placement:same-cell;'/>"));
page.Response.End();
}
#endregion