GridViewExport帮助类，美化导出代码,Asp.Net代码库,德仔网

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【Asp.Net】 GridViewExport帮助类，美化导出
作者:zhouljsh / 发布于2016/1/8/ 690

	1.将整GridView的数据导出到Excel中关增加一个效果线做美化
	最新的GridViewExport操作类

	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;
	 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.GetType() == typeof(BoundField))
	 s.Append("<td>" + grid.Columns.HeaderText + "</td>");
	
	 //s.Append("<td>" + grid.Columns.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();
	 }
	
	 }
	}
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