[英]populate excel workbook from a view
从视图中填充 excel 工作簿的最佳方法是什么?
我想在视图中设计一个文本框“StudentId”和一个“显示成绩”按钮。
一旦学生输入“StudentId”并单击“显示成绩”,我想从“StudentTable”中为该特定“StudentId”提取“成绩”并将其显示在 Excel 工作簿中。
我怎么能这样做?
提前致谢
如果导出到 Excel 2007+ (.xlsx) 适合您的情况,您可以查看 EPPlus 库。 它对我来说效果很好。 你不需要安装office。
http://epplus.codeplex.com/wikipage?title=WebapplicationExample
从网站导出到 excel 可能会很棘手。 我还没有找到一种干净的方法来做到这一点。 主要是因为它需要在服务器上安装office。
这里有一些例子。
http://forums.asp.net/t/1038105.aspx/1
http://madskristensen.net/post/Export-a-DataTable-to-Excel-in-ASPNET.aspx
但我建议简单地导出 in.csv
昂贵但令人难以置信的完整选项: Office Writer
另一种选择是填充 Gridview 然后更改然后调整响应标头以使浏览器下载结果 Excel 工作簿。
我使用以下内容生成一个简单的电子表格:
public class GridViewExportUtil
{
/// <summary>Exports a Gridview to Excel</summary>
/// <param name="fileName">File Name For The Excel file.</param>
/// <param name="gv">Gridview to Export</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";
bool dataAdded = false;
using (StringWriter sw = new StringWriter())
{
using (HtmlTextWriter htw = new HtmlTextWriter(sw))
{
// Create a form to contain the grid
Table table = new Table();
//Add Lines
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 Some Basic Formatting
foreach (TableCell tc in table.Rows[table.Rows.Count - 1].Cells)
{
tc.Style.Add(HtmlTextWriterStyle.FontWeight, "bold");
tc.BackColor = System.Drawing.Color.Black;
tc.ForeColor = System.Drawing.Color.White;
}
}
// add each of the data rows to the table
foreach (GridViewRow row in gv.Rows)
{
GridViewExportUtil.PrepareControlForExport(row);
table.Rows.Add(row);
dataAdded = true;
}
//If no data added add row with the Gridviews' no data message
if (!dataAdded)
{
TableCell cell = new TableCell();
cell.Text = gv.EmptyDataText;
cell.Style.Add(HtmlTextWriterStyle.FontWeight, "bold");
TableRow tmpRow = new TableRow();
tmpRow.Cells.Add(cell);
table.Rows.Add(tmpRow);
}
// 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);
}
}
}
}
这根本没有额外的要求服务器端。
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