Question

我有这个代码，我知道它可以快速运行

CopyAlltoClipboard(dataGridViewControl);
Microsoft.Office.Interop.Excel.Application xlexcel;
Microsoft.Office.Interop.Excel.Workbook xlWorkBook;
Microsoft.Office.Interop.Excel.Worksheet xlWorkSheet;
object misValue = System.Reflection.Missing.Value;
xlexcel = new Excel.Application();
xlexcel.Visible = true;
xlWorkBook = xlexcel.Workbooks.Add(misValue);
xlWorkSheet = (Excel.Worksheet)xlWorkBook.Worksheets.get_Item(1);
xlWorkSheet.Name = page.Name;
Excel.Range CR = (Excel.Range)xlWorkSheet.Cells[1, 1];
CR.Select();
xlWorkSheet.PasteSpecial(CR, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, true);
((Microsoft.Office.Interop.Excel.Range)xlWorkSheet.Range["A1"]).EntireColumn.Delete(null); // delete the first column that has rows indexes
xlWorkBook.SaveAs(fileName);

private void CopyAlltoClipboard(DataGridView dataGridViewControl)
{
    dataGridViewControl.SelectAll();
    DataObject dataObj = dataGridViewControl.GetClipboardContent();
    if (dataObj != null)
       Invoke((Action)(() => { Clipboard.SetDataObject(dataObj); }));
}

代码工作正常，但它只复制值是excel，也不复制单元格格式（换行文本，背景颜色，字体，边框等）任何人都可以帮我这个吗？如何完成此代码具有像DataGridView中的确切格式？

Answer 1

更新：现在可以在GitHub中使用： https://github.com/MeaningOfLights/DataGridToHTML

我很难理解为什么这不重复。网络上有examples here。

令我惊讶的是经过大量研究后，没有完整的示例将DataGridView导出到HTML或Excel，并在互联网上的任何位置进行格式化 - 直到现在：）

在您的问题中查看此代码，您已经发现使用Interop复制大型数据集的速度有多慢并且选择使用剪贴板：

dataGridViewControl.SelectAll();
DataObject dataObj = dataGridViewControl.GetClipboardContent();
if (dataObj != null)
    Invoke((Action)(() => { Clipboard.SetDataObject(dataObj); }));

这个问题的关键是 - 在DataGridView上使用剪贴板不包含单元格格式。由于剪贴板不包含格式，因此您必须回到原来的慢速性能问题，即必须单独设置单元格样式，使用Interop非常非常慢。

在这种情况下，您的项目可能更适合使用 XML而不是Interop 创建Excel文件。虽然我第一次认为这将是一个很好的解决方法，而DartAlex的另一个答案表明，我认为我编写了一个可以使用Clipboard方法的答案。使用格式获取 DataGridView的HTML副本 并将其粘贴到Excel中：

DataGridView到格式化的HTML表格，然后进入Excel

//==================================================== //DataGridView Export To HTML by Jeremy Thompson: https://stackoverflow.com/questions/39210329/ //==================================================== public string ConvertDataGridViewToHTMLWithFormatting(DataGridView dgv) { StringBuilder sb = new StringBuilder(); //create html & table sb.AppendLine("<html><body><center><table border='1' cellpadding='0' cellspacing='0'>"); sb.AppendLine("<tr>"); //create table header for (int i = 0; i < dgv.Columns.Count; i++) { sb.Append(DGVHeaderCellToHTMLWithFormatting(dgv, i)); sb.Append(DGVCellFontAndValueToHTML(dgv.Columns[i].HeaderText, dgv.Columns[i].HeaderCell.Style.Font)); sb.AppendLine("</td>"); } sb.AppendLine("</tr>"); //create table body for (int rowIndex = 0; rowIndex < dgv.Rows.Count; rowIndex++) { sb.AppendLine("<tr>"); foreach (DataGridViewCell dgvc in dgv.Rows[rowIndex].Cells) { sb.AppendLine(DGVCellToHTMLWithFormatting(dgv, rowIndex, dgvc.ColumnIndex)); string cellValue = dgvc.Value == null ? string.Empty : dgvc.Value.ToString(); sb.AppendLine(DGVCellFontAndValueToHTML(cellValue, dgvc.Style.Font)); sb.AppendLine("</td>"); } sb.AppendLine("</tr>"); } //table footer & end of html file sb.AppendLine("</table></center></body></html>"); return sb.ToString(); } //TODO: Add more cell styles described here: https://msdn.microsoft.com/en-us/library/1yef90x0(v=vs.110).aspx public string DGVHeaderCellToHTMLWithFormatting(DataGridView dgv, int col) { StringBuilder sb = new StringBuilder(); sb.Append("<td"); sb.Append(DGVCellColorToHTML(dgv.Columns[col].HeaderCell.Style.ForeColor, dgv.Columns[col].HeaderCell.Style.BackColor)); sb.Append(DGVCellAlignmentToHTML(dgv.Columns[col].HeaderCell.Style.Alignment)); sb.Append(">"); return sb.ToString(); } public string DGVCellToHTMLWithFormatting(DataGridView dgv, int row, int col) { StringBuilder sb = new StringBuilder(); sb.Append("<td"); sb.Append(DGVCellColorToHTML(dgv.Rows[row].Cells[col].Style.ForeColor, dgv.Rows[row].Cells[col].Style.BackColor)); sb.Append(DGVCellAlignmentToHTML(dgv.Rows[row].Cells[col].Style.Alignment)); sb.Append(">"); return sb.ToString(); } public string DGVCellColorToHTML(Color foreColor, Color backColor) { if (foreColor.Name == "0" && backColor.Name == "0") return string.Empty; StringBuilder sb = new StringBuilder(); sb.Append(" style=\""); if (foreColor.Name != "0" && backColor.Name != "0") { sb.Append("color:#"); sb.Append(foreColor.R.ToString("X2") + foreColor.G.ToString("X2") + foreColor.B.ToString("X2")); sb.Append("; background-color:#"); sb.Append(backColor.R.ToString("X2") + backColor.G.ToString("X2") + backColor.B.ToString("X2")); } else if (foreColor.Name != "0" && backColor.Name == "0") { sb.Append("color:#"); sb.Append(foreColor.R.ToString("X2") + foreColor.G.ToString("X2") + foreColor.B.ToString("X2")); } else //if (foreColor.Name == "0" && backColor.Name != "0") { sb.Append("background-color:#"); sb.Append(backColor.R.ToString("X2") + backColor.G.ToString("X2") + backColor.B.ToString("X2")); } sb.Append(";\""); return sb.ToString(); } public string DGVCellFontAndValueToHTML(string value,Font font) { //If no font has been set then assume its the default as someone would be expected in HTML or Excel if (font == null || font == this.Font && !(font.Bold | font.Italic | font.Underline | font.Strikeout)) return value; StringBuilder sb = new StringBuilder(); sb.Append(" "); if (font.Bold) sb.Append(""); if (font.Italic) sb.Append(""); if (font.Strikeout) sb.Append("<strike>"); //The element was deprecated in HTML 4.01. The new HTML 5 tag is: text-decoration: underline if (font.Underline) sb.Append(""); string size = string.Empty; if (font.Size != this.Font.Size) size = "font-size: " + font.Size + "pt;"; //The tag is not supported in HTML5. Use CSS or a span instead. if (font.FontFamily.Name != this.Font.Name) { sb.Append(""); } sb.Append(value); if (font.FontFamily.Name != this.Font.Name) sb.Append(""); if (font.Underline) sb.Append(""); if (font.Strikeout) sb.Append("</strike>"); if (font.Italic) sb.Append(""); if (font.Bold) sb.Append(""); return sb.ToString(); } public string DGVCellAlignmentToHTML(DataGridViewContentAlignment align) { if (align == DataGridViewContentAlignment.NotSet) return string.Empty; string horizontalAlignment = string.Empty; string verticalAlignment = string.Empty; CellAlignment(align, ref horizontalAlignment, ref verticalAlignment); StringBuilder sb = new StringBuilder(); sb.Append(" align='"); sb.Append(horizontalAlignment); sb.Append("' valign='"); sb.Append(verticalAlignment); sb.Append("'"); return sb.ToString(); } private void CellAlignment(DataGridViewContentAlignment align, ref string horizontalAlignment, ref string verticalAlignment) { switch (align) { case DataGridViewContentAlignment.MiddleRight: horizontalAlignment = "right"; verticalAlignment = "middle"; break; case DataGridViewContentAlignment.MiddleLeft: horizontalAlignment = "left"; verticalAlignment = "middle"; break; case DataGridViewContentAlignment.MiddleCenter: horizontalAlignment = "centre"; verticalAlignment = "middle"; break; case DataGridViewContentAlignment.TopCenter: horizontalAlignment = "centre"; verticalAlignment = "top"; break; case DataGridViewContentAlignment.BottomCenter: horizontalAlignment = "centre"; verticalAlignment = "bottom"; break; case DataGridViewContentAlignment.TopLeft: horizontalAlignment = "left"; verticalAlignment = "top"; break; case DataGridViewContentAlignment.BottomLeft: horizontalAlignment = "left"; verticalAlignment = "bottom"; break; case DataGridViewContentAlignment.TopRight: horizontalAlignment = "right"; verticalAlignment = "top"; break; case DataGridViewContentAlignment.BottomRight: horizontalAlignment = "right"; verticalAlignment = "bottom"; break; default: //DataGridViewContentAlignment.NotSet horizontalAlignment = "left"; verticalAlignment = "middle"; break; } } //Easy repro - copy/paste all this code in a Winform app! public Form1() { InitializeComponent(); } private void Form1_Load(object sender, EventArgs e) { string configFile = System.IO.Path.Combine(Application.StartupPath.Replace("\\bin\\Debug", ""), "testData.csv"); List<string[]> rows = System.IO.File.ReadAllLines(configFile).Select(x => x.Split(',')).ToList(); DataTable dataTable = new DataTable(); dataTable.Columns.Add("testing"); dataTable.Columns.Add("one"); dataTable.Columns.Add("two"); dataTable.Columns.Add("three"); rows.ForEach(x => { dataTable.Rows.Add(x); }); this.dgv.DataSource = dataTable; dgv.Columns[0].HeaderCell.Style.Font = new Font(this.Font, FontStyle.Strikeout); dgv[0, 0].Style.BackColor = Color.Aqua; dgv[1, 0].Style.Alignment = DataGridViewContentAlignment.BottomRight; dgv[2, 0].Style.Font = new Font(new FontFamily("Calibri"),(float)16); dgv[3, 0].Style.ForeColor = Color.Red; dgv[0, 1].Style.Font = new Font(this.Font, FontStyle.Bold); dgv[1, 1].Style.Font = new Font(this.Font, FontStyle.Underline); dgv[2, 1].Style.Font = new Font(this.Font, FontStyle.Italic); dgv[3, 1].Style.Font = new Font(this.Font, FontStyle.Bold | FontStyle.Underline); dgv[3, 1].Style.ForeColor = Color.Green; dgv[3, 1].Style.BackColor = Color.Yellow; dgv[0, 2].Style.Font = new Font(new FontFamily("Times New Roman"), (float)18); dgv[1, 2].Style.Font = new Font(new FontFamily("Georgia"), (float)12); dgv[2, 2].Style.Font = new Font(new FontFamily("Arial"), (float)14); dgv[3, 2].Style.Font = new Font(new FontFamily("Verdana"), (float)18); dgv[0, 3].Style.Font = new Font(new FontFamily("Courier New"), (float)11); dgv[1, 3].Style.Font = new Font(new FontFamily("Lucida Console"), (float)18); dgv[2, 3].Style.Font = new Font(new FontFamily("Times"), (float)14); dgv[3, 3].Style.Font = new Font(new FontFamily("serif"), (float)12); } private void button1_Click(object sender, EventArgs e) { string dgvToHTMLTable = ConvertDataGridViewToHTMLWithFormatting(dgv); Clipboard.SetText(dgvToHTMLTable); }

<强> TestData.csv：


魔术，阿布拉，Cadabra，轰！
 Coding，Fun，YeeHaa，ABS TableName
 您好，world，Population.html，表1.
 人口统计学，310102.xls，Comp.html，表2.

Answer 2

您的问题的关键是使用DataGridView上的剪贴板不包含单元格格式。由于剪贴板不包含格式，因此您需要单独设置单元格样式的原始慢速性能问题，使用Interop非常非常慢。

在这种情况下，使用XML而不是Interop创建Excel文件会更好。下面是一个使用ClosedXML将DataGridView导出到带格式的Excel的方法。

using ClosedXML.Excel;

public void ExportToExcelWithFormatting(DataGridView dataGridView1)
{
    string fileName;

    SaveFileDialog saveFileDialog1 = new SaveFileDialog();
    saveFileDialog1.Filter = "xls files (*.xlsx)|*.xlsx|All files (*.*)|*.*";
    saveFileDialog1.Title = "To Excel";
    saveFileDialog1.FileName = this.Text + " (" + DateTime.Now.ToString("yyyy-MM-dd") + ")";

    if (saveFileDialog1.ShowDialog() == DialogResult.OK)
    {
        fileName = saveFileDialog1.FileName;
        var workbook = new XLWorkbook();
        var worksheet = workbook.Worksheets.Add(this.Text);
        for (int i = 0; i < dataGridView1.Columns.Count; i++)
        {
            worksheet.Cell(1, i + 1).Value = dataGridView1.Columns[i].Name;
        }

        for (int i = 0; i < dataGridView1.Rows.Count; i++)
        {
            for (int j = 0; j < dataGridView1.Columns.Count; j++)
            {
                worksheet.Cell(i + 2, j + 1).Value = dataGridView1.Rows[i].Cells[j].Value.ToString();

                if (worksheet.Cell(i + 2, j + 1).Value.ToString().Length > 0)
                {
                    XLAlignmentHorizontalValues align;

                    switch (dataGridView1.Rows[i].Cells[j].Style.Alignment)
                    {
                        case DataGridViewContentAlignment.BottomRight:
                            align = XLAlignmentHorizontalValues.Right;
                            break;
                        case DataGridViewContentAlignment.MiddleRight:
                            align = XLAlignmentHorizontalValues.Right;
                            break;
                        case DataGridViewContentAlignment.TopRight:
                            align = XLAlignmentHorizontalValues.Right;
                            break;

                        case DataGridViewContentAlignment.BottomCenter:
                            align = XLAlignmentHorizontalValues.Center;
                            break;
                        case DataGridViewContentAlignment.MiddleCenter:
                            align = XLAlignmentHorizontalValues.Center;
                            break;
                        case DataGridViewContentAlignment.TopCenter:
                            align = XLAlignmentHorizontalValues.Center;
                            break;

                        default:
                            align = XLAlignmentHorizontalValues.Left;
                            break;
                    }

                    worksheet.Cell(i + 2, j + 1).Style.Alignment.Horizontal = align;

                    XLColor xlColor = XLColor.FromColor(dataGridView1.Rows[i].Cells[j].Style.SelectionBackColor);
                    worksheet.Cell(i + 2, j + 1).AddConditionalFormat().WhenLessThan(1).Fill.SetBackgroundColor(xlColor);

                    worksheet.Cell(i + 2, j + 1).Style.Font.FontName = dataGridView1.Font.Name;
                    worksheet.Cell(i + 2, j + 1).Style.Font.FontSize = dataGridView1.Font.Size;

                }                                           
            }
        }
        worksheet.Columns().AdjustToContents();
        workbook.SaveAs(fileName);
        //MessageBox.Show("Done");
    }
}

Answer 3

似乎我找到了使用interop和EPPlus的解决方案。我使用上面的代码只复制Excel中的值，然后使用下面的代码（EPPlus代码）从dataGridView获取格式。此代码取决于您要从dataGridView获取的内容。在下面的代码中，我想从第一行获取WrapText，从每个写入的单元格中获取背景颜色

private void FinalizeWorkbook(DataTableReportParam reportParam, DataGridView dataGridViewControl)
{
    FileInfo newFile = new FileInfo(reportParam.FileName);
    ExcelPackage pck = new ExcelPackage(newFile);
    IWorksheet worksheet = pck.Workbook.Worksheets[1];

    // wrap text and color the crashes with problems (header)
    for (int col = 1; col <= worksheet.Dimension.End.Column; col++)
    {
        worksheet[1, col].WrapText = true;
        worksheet[1, col].AutofitRows();
        if (String.Compare(dataGridViewControl[col - 1, 0].Style.BackColor.Name, "0") != 0)
            worksheet[1, col].CellStyle.Color = dataGridViewControl[col - 1, 0].Style.BackColor;
    }

    // color the cells
    for (int row = 2; row <= worksheet.Dimension.End.Row; row++)
    {
        for (int col = 1; col <= worksheet.Dimension.End.Column; col++)
        {
            if (String.Compare(dataGridViewControl[col - 1, row - 1].Style.BackColor.Name, "0") != 0)
                worksheet[row, col].CellStyle.Color = dataGridViewControl[col - 1, row - 1].Style.BackColor;
        }
    }
    //save and dispose
    pck.Save();
    pck.Dispose();
}

使用所有单元格格式将dataGridView导出到Excel

3 个答案: