在 c# 中导出到 Excel
本文关键字:Excel | 更新日期: 2023-09-27 18:36:32
我有一个带有网格视图的页面。我需要以 excel 格式下载该网格视图数据。我使用以下代码下载为 excel 格式。
public static void Export(string fileName, GridView gv)
{
string style = @"<style> .text { mso-number-format:'@;text-align:right; } </style> ";
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))
{
HttpContext.Current.Response.Write(style);
// Create a table to contain the grid
System.Web.UI.WebControls.Table table = new System.Web.UI.WebControls.Table();
// include the gridline settings
table.GridLines = gv.GridLines;
// 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)
{
// add numeric style for each cell
foreach (TableCell cell in row.Cells)
{
cell.Attributes.Add("class", "text");
}
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.ApplicationInstance.CompleteRequest();
}
}
}
/// <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())
{
PrepareControlForExport(current);
}
}
}
下载文件后,也会下载母版页的 css 文件。你能告诉我,如何解决这个问题。
从 C# 创建真正的 Excel 文件的最简单方法是使用 ClosedXML 库:ClosedXML。ClosedXML 也可作为 NuGet 包提供,以便于入门。
试试我的工作方法:
void ExportToExcel(GridView grdData, string filename)
{
grdData.BorderStyle = BorderStyle.Solid;
grdData.BorderWidth = 1;
grdData.BackColor = Color.WhiteSmoke;
grdData.GridLines = GridLines.Both;
grdData.Font.Name = "Verdana";
grdData.Font.Size = FontUnit.XXSmall;
grdData.HeaderStyle.BackColor = Color.DimGray;
grdData.HeaderStyle.ForeColor = Color.White;
grdData.RowStyle.HorizontalAlign = HorizontalAlign.Left;
grdData.RowStyle.VerticalAlign = VerticalAlign.Top;
HttpResponse response = HttpContext.Current.Response;
response.Clear();
response.Charset = "";
response.ContentType = "application/vnd.ms-excel";
response.AddHeader("Content-Disposition", "attachment;filename='"" + filename+ "'"");
using (var sw = new StringWriter())
{
using (var htw = new HtmlTextWriter(sw))
{
grdData.RenderControl(htw);
response.Write(sw.ToString());
response.End();
}
}
}
Response.ClearContent();
Response.Buffer = true;
Response.AddHeader("content-disposition", string.Format("attachment; filename={0}", "excelname.xls"));
Response.ContentType = "application/ms-excel";
//which row you dont want in gridview
GridView5.Columns[0].Visible = false;
StringWriter sw = new StringWriter();
HtmlTextWriter htw = new HtmlTextWriter(sw);
GridView5.AllowPaging = false;
GridView5.RenderControl(htw);
Response.Write(sw.ToString());
Response.End();