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C#实现GridView导出Excel实例代码

作者：rush_me 时间：2023-10-29 04:31:09　

导出Excel在很多项目中经常用到，本人介绍了C#实现GridView导出Excel实例代码，也全当给自己留下个学习笔记了。


using System.Data;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.IO;
using System.Text;

namespace DotNet.Utilities
{
/// <summary>
/// Summary description for GridViewExport
/// </summary>
public class GridViewExport
{
 public GridViewExport()
 {
  //
  // TODO: Add constructor logic here
  //
 }

public static void Export(string fileName, GridView gv)
 {
  HttpContext.Current.Response.Clear();
  HttpContext.Current.Response.AddHeader(
   "content-disposition", string.Format("attachment; filename={0}", fileName));
  HttpContext.Current.Response.ContentType = "application/ms-excel";
  //HttpContext.Current.Response.Charset = "utf-8";

using (StringWriter sw = new StringWriter())
  {
   using (HtmlTextWriter htw = new HtmlTextWriter(sw))
   {
    // Create a form to contain the grid
    Table table = new Table();
    table.GridLines = GridLines.Both; //单元格之间添加实线

// add the header row to the table
    if (gv.HeaderRow != null)
    {
     PrepareControlForExport(gv.HeaderRow);
     table.Rows.Add(gv.HeaderRow);
    }

// add each of the data rows to the table
    foreach (GridViewRow row in gv.Rows)
    {
     PrepareControlForExport(row);
     table.Rows.Add(row);
    }

// add the footer row to the table
    if (gv.FooterRow != null)
    {
     PrepareControlForExport(gv.FooterRow);
     table.Rows.Add(gv.FooterRow);
    }

// render the table into the htmlwriter
    table.RenderControl(htw);

// render the htmlwriter into the response
    HttpContext.Current.Response.Write(sw.ToString());
    HttpContext.Current.Response.End();
   }
  }
 }

/// <summary>
 /// Replace any of the contained controls with literals
 /// </summary>
 /// <param name="control"></param>
 private static void PrepareControlForExport(Control control)
 {
  for (int i = 0; i < control.Controls.Count; i++)
  {
   Control current = control.Controls[i];
   if (current is LinkButton)
   {
    control.Controls.Remove(current);
    control.Controls.AddAt(i, new LiteralControl((current as LinkButton).Text));
   }
   else if (current is ImageButton)
   {
    control.Controls.Remove(current);
    control.Controls.AddAt(i, new LiteralControl((current as ImageButton).AlternateText));
   }
   else if (current is HyperLink)
   {
    control.Controls.Remove(current);
    control.Controls.AddAt(i, new LiteralControl((current as HyperLink).Text));
   }
   else if (current is DropDownList)
   {
    control.Controls.Remove(current);
    control.Controls.AddAt(i, new LiteralControl((current as DropDownList).SelectedItem.Text));
   }
   else if (current is CheckBox)
   {
    control.Controls.Remove(current);
    control.Controls.AddAt(i, new LiteralControl((current as CheckBox).Checked ? "True" : "False"));
   }

if (current.HasControls())
   {
    PrepareControlForExport(current);
   }
  }
 }

/// <summary>
 /// 导出Grid的数据(全部)到Excel
 /// 字段全部为BoundField类型时可用
 /// 要是字段为TemplateField模板型时就取不到数据
 /// </summary>
 /// <param name="grid">grid的ID</param>
 /// <param name="dt">数据源</param>
 /// <param name="excelFileName">要导出Excel的文件名</param>
 public static void OutputExcel(GridView grid, DataTable dt, string excelFileName)
 {
  Page page = (Page)HttpContext.Current.Handler;
  page.Response.Clear();
  string fileName = System.Web.HttpUtility.UrlEncode(System.Text.Encoding.UTF8.GetBytes(excelFileName));
  page.Response.AddHeader("Content-Disposition", "attachment:filename=" + fileName + ".xls");
  page.Response.ContentType = "application/vnd.ms-excel";
  page.Response.Charset = "utf-8";

StringBuilder s = new StringBuilder();
  s.Append("<HTML><HEAD><TITLE>" + fileName + "</TITLE><META http-equiv=\"Content-Type\" content=\"text/html; charset=utf-8\"></head><body>");

int count = grid.Columns.Count;

s.Append("<table border=1>");
  s.AppendLine("<tr>");
  for (int i = 0; i < count; i++)
  {

if (grid.Columns[i].GetType() == typeof(BoundField))
    s.Append("<td>" + grid.Columns[i].HeaderText + "</td>");

//s.Append("<td>" + grid.Columns[i].HeaderText + "</td>");

}
  s.Append("</tr>");

foreach (DataRow dr in dt.Rows)
  {
   s.AppendLine("<tr>");
   for (int n = 0; n < count; n++)
   {
    if (grid.Columns[n].Visible && grid.Columns[n].GetType() == typeof(BoundField))
     s.Append("<td>" + dr[((BoundField)grid.Columns[n]).DataField].ToString() + "</td>");

}
   s.AppendLine("</tr>");
  }

s.Append("</table>");
  s.Append("</body></html>");

page.Response.BinaryWrite(System.Text.Encoding.GetEncoding("utf-8").GetBytes(s.ToString()));
  page.Response.End();
 }

}
}

来源：http://www.cnblogs.com/rushme/p/6613987.html?utm_source=tuicool&utm_medium=referral

标签：C#,gridview,excel
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