ASP.NET常用导出Excel方法汇总

本文转载：http://mattberseth.com/blog/2007/04/export_gridview_to_excel_1.html

               http://geekswithblogs.net/azamsharp/archive/2005/12/21/63843.aspx

               http://forums.asp.net/t/1221467.aspx

C# Excel操作类 ExcelHelper

http://www.cnblogs.com/nhsd/p/3968374.html         

Export GridView to Excel

using System;
using System.Data;
using System.Configuration;
using System.IO;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;

/// <summary>
/// 
/// </summary>
public class GridViewExportUtil
{
    /// <summary>
    /// 
    /// </summary>
    /// <param name="fileName"></param>
    /// <param name="gv"></param>
    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";

        using (StringWriter sw = new StringWriter())
        {
            using (HtmlTextWriter htw = new HtmlTextWriter(sw))
            {
                //  Create a table to contain the grid
                Table table = new Table();

                //  include the gridline settings
                table.GridLines = gv.GridLines;

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

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

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

　　

本文转载：http://www.webpronews.com/aspnet-export-a-datatable-to-excel-2006-11

ASP.NET: Export a DataTable to Excel

Back in February I wrote a post on how to export DataTables to XML and Excel and I still get a lot of search engine traffic to that post.

People have been asking me to simplify the example and only concentrate on the Excel export, so that’s what I will do now.

All spreadsheet applications (Excel, Calc etc.) understand semicolon separated files natively, so everyone can use this method – you don’t even have to use Excel for it to work.

public static void ExportToSpreadsheet(DataTable table, string name)
{
   HttpContext context = HttpContext.Current;
   context.Response.Clear();
   foreach (DataColumn column in table.Columns)
   {
    context.Response.Write(column.ColumnName + ";");
   }
   context.Response.Write(Environment.NewLine);
   foreach (DataRow row in table.Rows)
   {
    for (int i = 0; i < table.Columns.Count; i++)
    {
     context.Response.Write(row[i].ToString().Replace(";", string.Empty) + ";");
    }
    context.Response.Write(Environment.NewLine);
   }
   context.Response.ContentType = "text/csv";
   context.Response.AppendHeader("Content-Disposition", "attachment; filename=" + name + ".csv");
   context.Response.End();
}

Then just call this method and pass the DataTable and the filename as parameters.

ExportToSpreadsheet(table, "products");