Question

我的页面上有一个按钮，允许用户将GridView的内容保存到Excel。进行工作的类是从View派生的，而不是Page，这里是到目前为止的代码：

Response.Buffer = true;
Response.AddHeader("content-disposition", "attachment;filename=file.xls");
Response.Charset = "";
Response.ContentType = "application/vnd.ms-excel";

StringBuilder sb = newStringBuilder();
StringWriter sw = newStringWriter(sb);
Html32TextWriter htw = newHtml32TextWriter(sw);
Page page = new Page();
HtmlForm f = newHtmlForm();

page.Controls.Add(f);
f.Controls.Add(gridView);
HttpContext.Current.Server.Execute(page, htw, true);

Response.Write(sb);

这将导致创建文件，用户可以下载该文件，但是在Excel中打开该文件时，将显示gridview包含表单的全部内容（包括任何JS）：

因为这是在View而非Page中完成的，所以我无法使用：

Public Overrides Sub VerifyRenderingInServerForm(ByVal control As Control)

End Sub

...以及使用时：

gridView.RenderControl(...);

单击按钮时出现404错误。

我如何仅以gridview为目标并以适当的格式将其添加到Response中？

Answer 1

  private void ExtractDataToCSV(DataGridView dgv)
    {
        try
        {
            // Don't save if no data is returned
            if (dgv.Rows.Count == 0)
            {
                return;
            }
            StringBuilder sb = new StringBuilder();
            // Column headers
            string columnsHeader = "";
            for (int i = 0; i < dgv.Columns.Count; i++)
            {
                columnsHeader += dgv.Columns[i].Name + ",";
            }
            sb.Append(columnsHeader + Environment.NewLine);
            // Go through each cell in the datagridview
            foreach (DataGridViewRow dgvRow in dgv.Rows)
            {
                // Make sure it's not an empty row.
                if (!dgvRow.IsNewRow)
                {
                    for (int c = 0; c < dgvRow.Cells.Count; c++)
                    {
                        // Append the cells data followed by a comma to delimit.

                        sb.Append(dgvRow.Cells[c].Value + ",");
                    }
                    // Add a new line in the text file.
                    sb.Append(Environment.NewLine);
                }
            }
            // Load up the save file dialog with the default option as saving asva.csvfile.
            SaveFileDialog sfd = new SaveFileDialog();
            sfd.Filter = "CSV files (*.csv)|*.csv";
            if (sfd.ShowDialog() == System.Windows.Forms.DialogResult.OK)
            {
                // If they've selected a save location...
                using (System.IO.StreamWriter sw = new System.IO.StreamWriter(sfd.FileName, false))
                {
                    // Write the stringbuilder text to the the file.
                    sw.WriteLine(sb.ToString());
                }
            }
            // Confirm to the user it has been completed.
            MessageBox.Show("CSV file saved.");

        }
        catch (Exception ex) { }
    }

如何将GridView导出到.xls

1 个答案: