我正在使用导出到Excel的复选框来解决Gridview的问题（下面的示例代码。实际代码包含更多复选框）。发生的是1）用户点击按钮开始导出过程，然后2）用户将文件保存或下载到他们的桌面，3）文件花费相当多的时间来呈现基本单元格（＆gt; 15秒），然后一旦基本的excel文件呈现3）电子表格呈现复选框（渲染时间需要3到10分钟，具体取决于计算机的速度）并且似乎挂起，直到复选框看起来像它们出现在GridView中
我还应该注意到这个示例文件大约是800k，我能够将其他更大的gridview导出到Excel，而不会立即将复选框导出。
我知道，除非将其保存为电子表格/工作簿，否则网页中的实际导出文件不是真正的Excel文件。但是，带有复选框的gridview需要很长时间才能呈现为“电子表格”，这似乎有点奇怪。
我的问题是这个 - 导出excel电子表格的常规行为是否与复选框有关或是否有某些方法我可以改进下面的代码以确保Excel电子表格在打开时不会长时间挂起？还有其他解决方案可以帮助加快复选框渲染时间吗？
aspx代码
<%@ Page Title="Test Page" Language="C#" MasterPageFile="~/Site.master" EnableEventValidation="false" AutoEventWireup="true" CodeFile="form2.aspx.cs" Inherits="form2" %>
<asp:Content ID="Content1" ContentPlaceHolderID="HeadContent" Runat="Server"></asp:Content>
<asp:Content ID="Content2" ContentPlaceHolderID="FeaturedContent" Runat="Server"></asp:Content>
<asp:Content ID="Content3" ContentPlaceHolderID="MainContent" Runat="Server">
<asp:Button ID="Button1" runat="server" Height="38px" OnClick="Button1_CLick" Text="Export to Excel" Width="200px" />
<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False" CellPadding="4" DataSourceID="SqlDataSource1" ForeColor="#333333" GridLines="None">
<AlternatingRowStyle BackColor="White" />
<Columns>
<asp:CommandField ShowEditButton="True" />
<asp:BoundField DataField="Field 1" HeaderText="Field 1" SortExpression="Field 1" />
<asp:BoundField DataField="Field 2" HeaderText="Field 2" SortExpression="Field 2" />
<asp:BoundField DataField="Field 3" HeaderText="Field 3" SortExpression="Field 3" />
<asp:BoundField DataField="Field 4" HeaderText="Field 4" SortExpression="Field 4" />
<asp:BoundField DataField="Field 5" HeaderText="Field 5" SortExpression="Field 5" />
<asp:BoundField DataField="Field 6" HeaderText="Field 6" SortExpression="Field 6" />
<asp:BoundField DataField="Field 7" HeaderText="Field 7" SortExpression="Field 7" />
<asp:BoundField DataField="Field 8" HeaderText="Field 8" SortExpression="Field 8" />
<asp:BoundField DataField="Field 9" HeaderText="Field 9" SortExpression="Field 9" />
<asp:Panel ID="pnlClick" runat="server" CssClass="collapsiblepanelCSS">
<div style="background-color:blue;height:30px; vertical-align: middle">
<div style="float: left;color:white;padding: 5px 5px 0 0 ">
Server List Collapsable Panel
</div>
<div style="float: right; color: white; padding: 5px 5px 0 0" id="divshow">
<asp:Label ID="lblMessage" runat="server" Text="Label" />
</div>
<div style="clear:both">
</div>
</div>
</asp:Panel>
<asp:Panel ID="pnlCollapsable" runat="server" Height="0" CssClass="collapsiblepanelCSS">
<asp:CheckBoxField DataField="Check Box 1" HeaderText="Check Box 1" SortExpression="Check Box 1" />
<asp:CheckBoxField DataField="Check Box 2" HeaderText="Check Box 2" SortExpression="Check Box 2" />
<asp:CheckBoxField DataField="Check Box 3" HeaderText="Check Box 3" SortExpression="Check Box 3" />
<asp:CheckBoxField DataField="Check Box 4" HeaderText="Check Box 4" SortExpression="Check Box 4" />
<asp:CheckBoxField DataField="Check Box 5" HeaderText="Check Box 5" SortExpression="Check Box 5" />
<asp:CheckBoxField DataField="Check Box 6" HeaderText="Check Box 6" SortExpression="Check Box 6" />
<asp:CheckBoxField DataField="Check Box 7" HeaderText="Check Box 7" SortExpression="Check Box 7" />
<asp:CheckBoxField DataField="Check Box 8" HeaderText="Check Box 8" SortExpression="Check Box 8" />
<asp:CheckBoxField DataField="Check Box 9" HeaderText="Check Box 9" SortExpression="Check Box 9" />
<asp:CheckBoxField DataField="Check Box 10" HeaderText="Check Box 10" SortExpression="Check Box 10" />
<asp:CheckBoxField DataField="Check Box 11" HeaderText="Check Box 11" SortExpression="Check Box 11" />
<asp:CheckBoxField DataField="Check Box 12" HeaderText="Check Box 12" SortExpression="Check Box 12" />
</asp:Panel>
<CC1:CollapsiblePanelExtender ID="CollapsiblePanelExtender1" Collapsed="true" ExpandControlID="pnlClick" TextLabelID="lblMessage" CollapsedText="Click To Show" ExpandedText="Click To Hide" ImageControlID="imgArrows" ExpandDirection="Vertical" TargetControlID="pnlCollapsable" ScrollContents="false" runat="server"></CC1:CollapsiblePanelExtender>
<asp:BoundField DataField="Field 10" HeaderText="Field 10" SortExpression="Field 10" />
<asp:BoundField DataField="Field 11" HeaderText="Field 11" SortExpression="Field 11" />
<asp:BoundField DataField="Field 12" HeaderText="Field 12" SortExpression="Field 12" />
<asp:CommandField ShowEditButton="True" />
</Columns>
<EditRowStyle BackColor="#2461BF" />
<FooterStyle BackColor="#507CD1" Font-Bold="True" ForeColor="White" />
<HeaderStyle BackColor="#507CD1" Font-Bold="True" ForeColor="White" />
<PagerStyle BackColor="#2461BF" ForeColor="White" HorizontalAlign="Center" />
<RowStyle BackColor="#EFF3FB" />
<SelectedRowStyle BackColor="#D1DDF1" Font-Bold="True" ForeColor="#333333" />
<SortedAscendingCellStyle BackColor="#F5F7FB" />
<SortedAscendingHeaderStyle BackColor="#6D95E1" />
<SortedDescendingCellStyle BackColor="#E9EBEF" />
<SortedDescendingHeaderStyle BackColor="#4870BE" />
</asp:GridView>
<sql connection strings, insert/update SQL code, update parameters, and closing ASP/HTML tags>
cs文件
using System;
using System.Configuration;
using System.Data;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
public partial class form2 : system.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
}
public override void VerifyRenderingInServerForm(Control control)
{
}
protected void Button1_Click(object sender, EventArgs e)
{
Response.Clear();
Response.AddHeader("content-disposition", "attachement;filename=FileNAme.xls");
Response.ContentType = "application/vnd.xlsx";
System.IO.StringWriter stringWrite = new System.IO.StringWriter();
System.Web.UI.HtmlTextWriter htmlWrite = new HtmlTextWriter(stringWrite);
GridView1.RenderControl(htmlWrite);
Response.Write(stringWrite.ToString());
Response.End();
}
}
答案 0 :(得分：0)
经过一些研究后我确定，从gridview导出到Excel的大量复选框（特别是当gridview的大小相当大时），对于所有复选框，导出过程需要相当长的时间正确渲染最终产品。
当然，导出的Excel文档在专门保存为电子表格之前不是真正的电子表格。我只想把它放在'记录'上，即导出时复选框渲染过程需要相当长的时间。也许这可以用来使标签中注明的产品的未来版本中的过程不那么冗长。