将 GridView 导出到 Excel，而不会丢失 Excel 中的网格线答案

【问题标题】：Export GridView to Excel without losing grid lines in Excel将 GridView 导出到 Excel，而不会丢失 Excel 中的网格线
【发布时间】：2011-01-23 11:44:08
【问题描述】：

我有一个要导出到 Excel 的 GridView。当我使用我在网上找到的示例代码时，它可以很好地将内容导出到 Excel，但由于某种原因，它也会清除导出表之外的所有网格线。

对于您的普通 excel 用户来说，这很容易解决，但我需要这个解决方案来为每个人工作。

那么有没有办法将 GridView 中的数据导出到 Excel 工作簿中，这样看起来就像是刚刚输入到 Excel 中一样？我在下面粘贴了我正在使用的代码，假设存在一个名为 toPrint 的 GridView 并且具有准确的数据。

Response.Clear();
Response.AddHeader("content-disposition", "attachment; filename=" + name + "_Registration_Forms.xls");
Response.Charset = "";
Response.ContentType = "application/vnd.ms-excel";
Page.EnableViewState = false;

System.IO.StringWriter stringWrite = new System.IO.StringWriter();
System.Web.UI.HtmlTextWriter htmlWrite = new HtmlTextWriter(stringWrite);

toPrint.RenderControl(htmlWrite);

Response.Write(stringWrite.ToString());
Response.End();

编辑：找到一个部分解决方案。如果我导出为以逗号分隔的列表并将标题设置为 CSV 文件，它会正常打开并显示所有网格线（即使是导出数据之外的网格线）。当然，唯一的问题是在导出它们之前必须从我的值中删除每个逗号和换行符。

【问题讨论】：

上述方法输出一个 HTML 格式的表格，Excel 出色地完成了该表格的解析和几乎完全相同的复制显示。我不确定是否有解决方案，但如果格式不是那么重要，CSV 输出可能是一个不错的选择。
对于那些可能感兴趣的人，o.k.w 的评论是我的方式。这并不完美，因为现在我必须从要导出的内容中去掉逗号，但最终用户更喜欢这种方法。
您可以尝试使用制表符而不是逗号来分隔值

标签： .net asp.net excel gridview export

【解决方案1】：

下面的帖子给了我答案。 http://forums.asp.net/t/1074110.aspx 我将总结如何处理代码。

System.IO.StringWriter dvWriter = new System.IO.StringWriter();
System.Web.UI.HtmlTextWriter OutputGenerator = new System.Web.UI.HtmlTextWriter(dvWriter);

            //To put in the excel gridlines 
            dvWriter.Write(@"<html xmlns:x=""urn:schemas-microsoft-com:office:excel"">");
            dvWriter.Write(@"<head>
                               <xml>
                                 <x:ExcelWorkbook> 
                                    <x:ExcelWorksheets>
                                       <x:ExcelWorksheet>
                                          <x:WorksheetOptions>
                                             <x:Panes></x:Panes>
                                             <x:Print><x:Gridlines /></x:Print>
                                          </x:WorksheetOptions>
                                        </x:ExcelWorksheet>
                                      </x:ExcelWorksheets>
                                    </x:ExcelWorkbook>
                                  </xml>
                                </head>");
//*******Put your Table Body here *******

【讨论】：

【解决方案2】：

我过去使用过下面的辅助函数。我只是给了用户一个复选框，他们可以选择是否包含网格线。显然，您可以将其更改为始终包含网格线。

namespace Helpers
{
    public class GridViewExportUtil
    {
        public static void Export(string fileName, GridView gv, bool includeGridLines)
        {
           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 form to contain the grid
               Table table = new Table();

            if (includeGridLines)
            {
               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);
               }
           }
        }
    }
}

这是你如何称呼它的一个例子：

GridViewExportUtil.Export("QueryResults.xls", GridView1, includeGridLines);

【讨论】：

我把这段代码放到了合适的位置，但它不起作用。现在什么都没有导出，页面只是重新加载，就像按钮点击事件中没有代码一样。
此外，该代码处理在输出到 Excel 的值网格中显示或不显示网格线。它对工作簿中的其余单元格没有任何作用。
大卫格拉斯...不错的sn-p。是门将！

【解决方案3】：

我在导出到 Excel 时遇到了同样的问题，没有得到网格线。

我解决它的方法是将Gridlines="Both" 放在<datagrid> 标记内。

【讨论】：

这仍然将 excel 中的其余网格线（数据之外）留空

【解决方案4】：

Public Overrides Sub VerifyRenderingInServerForm(control As Control)
    'base.VerifyRenderingInServerForm(control);
'This remains empty
End Sub

Protected Sub btnExcel_Click(sender As Object, e As ImageClickEventArgs) Handles btnExcel.Click

    Response.Clear()
    Response.AddHeader("content-disposition", "attachment;filename=FileName.xls")
    Response.Charset = ""
    Response.Cache.SetCacheability(HttpCacheability.NoCache)
    Response.ContentType = "application/vnd.ms-excel"

    Dim stringWrite As New System.IO.StringWriter()
    Dim htmlWrite As System.Web.UI.HtmlTextWriter = New HtmlTextWriter(stringWrite)

    htmlWrite.Write("<html xmlns:o=""urn:schemas-microsoft-com:office:office"" ")
    htmlWrite.Write("xmlns:x=""urn:schemas-microsoft-com:office:excel"" ")
    htmlWrite.Write("xmlns=""http://www.w3.org/TR/REC-html40""> ")
    htmlWrite.Write("<head> ")
    htmlWrite.Write("<!--[if gte mso 9]><xml> ")
    htmlWrite.Write("<x:ExcelWorkbook> ")
    htmlWrite.Write("<x:ExcelWorksheets> ")
    htmlWrite.Write("<x:ExcelWorksheet> ")
    htmlWrite.Write("<x:Name>Sheet1</x:Name> ")
    htmlWrite.Write("<x:WorksheetOptions> ")
    htmlWrite.Write("<x:Selected/> ")
    htmlWrite.Write("<x:ProtectContents>False</x:ProtectContents> ")
    htmlWrite.Write("<x:ProtectObjects>False</x:ProtectObjects> ")
    htmlWrite.Write("<x:ProtectScenarios>False</x:ProtectScenarios> ")
    htmlWrite.Write("</x:WorksheetOptions> ")
    htmlWrite.Write("</x:ExcelWorksheet> ")
    htmlWrite.Write("</x:ExcelWorksheets> ")
    htmlWrite.Write("</x:ExcelWorkbook> ")
    htmlWrite.Write("</xml><![endif]--> ")
    htmlWrite.Write("</head>")
    htmlWrite.WriteLine("")

    gridView.HeaderStyle.Reset()
    gridView.FooterStyle.Reset()
    gridView.AlternatingRowStyle.Reset()
    gridView.RowStyle.Reset()

    gridView.BackColor = Color.Transparent
    gridView.GridLines = GridLines.None
    gridView.RenderControl(htmlWrite)

    Response.Write(stringWrite.ToString())
    Response.[End]()
End Sub

public override void VerifyRenderingInServerForm(Control control)
{
    //base.VerifyRenderingInServerForm(control);
    //This remains empty
}


protected void btnExcel_Click(object sender, ImageClickEventArgs e)
{
    Response.Clear();
    Response.AddHeader("content-disposition", "attachment;filename=FileName.xls");
    Response.Charset = "";
    Response.Cache.SetCacheability(HttpCacheability.NoCache);
    Response.ContentType = "application/vnd.ms-excel";
    System.IO.StringWriter stringWrite = new System.IO.StringWriter();
    System.Web.UI.HtmlTextWriter htmlWrite = new HtmlTextWriter(stringWrite);

    htmlWrite.Write("<html xmlns:o=\"urn:schemas-microsoft-com:office:office\" ");
    htmlWrite.Write("xmlns:x=\"urn:schemas-microsoft-com:office:excel\" ");
    htmlWrite.Write("xmlns=\"http://www.w3.org/TR/REC-html40\"> ");
    htmlWrite.Write("<head> ");
    htmlWrite.Write("<!--[if gte mso 9]><xml> ");
    htmlWrite.Write("<x:ExcelWorkbook> ");
    htmlWrite.Write("<x:ExcelWorksheets> ");
    htmlWrite.Write("<x:ExcelWorksheet> ");
    htmlWrite.Write("<x:Name>Sheet1</x:Name> ");
    htmlWrite.Write("<x:WorksheetOptions> ");
    htmlWrite.Write("<x:Selected/> ");
    htmlWrite.Write("<x:ProtectContents>False</x:ProtectContents> ");
    htmlWrite.Write("<x:ProtectObjects>False</x:ProtectObjects> ");
    htmlWrite.Write("<x:ProtectScenarios>False</x:ProtectScenarios> ");
    htmlWrite.Write("</x:WorksheetOptions> ");
    htmlWrite.Write("</x:ExcelWorksheet> ");
    htmlWrite.Write("</x:ExcelWorksheets> ");
    htmlWrite.Write("</x:ExcelWorkbook> ");
    htmlWrite.Write("</xml><![endif]--> ");
    htmlWrite.Write("</head>");
    htmlWrite.WriteLine("");

    gridView.HeaderStyle.Reset();
    gridView.FooterStyle.Reset();
    gridView.AlternatingRowStyle.Reset();
    gridView.RowStyle.Reset();

    gridView.BackColor = Color.Transparent;
    gridView.GridLines = GridLines.None;
    gridView.RenderControl(htmlWrite);

    Response.Write(stringWrite.ToString());
    Response.End();

}

【讨论】：