ASP.NET常用匯出Excel方法匯總

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本文轉載：http://mattberseth.com/blog/2007/04/export_gridview_to_excel_1.html

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

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

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);            }        }    }}

　　

 

 

本文轉載：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");