如何导出datagridview单元格格式的值为excel？

我正在制作Windows窗体应用程序。

当点击导出button时，datagridview的数据导出到Excel文件。

我已经build立了这个代码，它运作良好。 但今天我更新了我的代码。

我添加Datagridview CellFormatting事件，更改文件大小值，并显示

它到Datagridview。

然后，我在excel文件中导出为ex​​cel，仍然原始数据显示

即原始数据为451936256，转换后的数据为431MB

在Excel表格中，显示451936256。

我的代码在下面

//Button click Event private void mtbtnExportToExcel_Click(object sender, EventArgs e) { DataGridView[] dgv = new DataGridView[] { mgrdWebApplication, mgrdContentDatabase, mgrdSiteCollections, mgrdSites, mgrdLists, mgridDocumentLibrary }; mtProgressStatus.Spinning = true; ExportDataToExcel(dgv, "MigStatus"); mtProgressStatus.Spinning = false; } //Export gridview data to excel private bool ExportDataToExcel(DataGridView[] dgv, string fileName) { string saveFileName = ""; SaveFileDialog saveDialog1 = new SaveFileDialog(); saveDialog1.DefaultExt = "xlsx"; saveDialog1.Filter = "Excel file|*.xlsx"; saveDialog1.FileName = fileName; saveDialog1.ShowDialog(); saveFileName = saveDialog1.FileName; if (saveFileName.IndexOf(":") < 0) return false; Excel.Application xlApp = new Excel.Application(); if (xlApp == null) { MessageBox.Show("Can`t create Excel"); return false; } Excel.Workbooks workBooks = xlApp.Workbooks; Excel.Workbook workBook = xlApp.Workbooks.Add(Excel.XlWBATemplate.xlWBATWorksheet); Excel.Worksheet workSheet = (Excel.Worksheet)workBook.Worksheets[1]; try { for (int index = 0; index < dgv.Length; index++) { for (int i = 0; i < dgv[index].ColumnCount; i++) { if (dgv[index].Columns[i].Visible) workSheet.Cells[1, i + 1] = dgv[index].Columns[i].HeaderText; } for (int r = 0; r < dgv[index].Rows.Count; r++) { for (int i = 0; i < dgv[index].ColumnCount; i++) { if (dgv[index].Columns[i].Visible) workSheet.Cells[r + 2, i + 1] = dgv[index].Rows[r].Cells[i].Value.ToString(); } Application.DoEvents(); } ((Excel.Range)workSheet.Rows[1, Type.Missing]).Font.Bold = true; workSheet.Columns.EntireColumn.AutoFit(); if (index < dgv.Length - 1) { workSheet = (Excel.Worksheet)workBook.Worksheets.Add(); } } } catch(Exception ex) { //LogWrite logWrites = new LogWrite(); writeLog.LogsWrite(ex.ToString()); } if (saveFileName != "") { try { workBook.Saved = true; workBook.SaveCopyAs(saveFileName); } catch(Exception ex) { MessageBox.Show("Error, file is already opened!\n" + ex.Message); } } xlApp.Quit(); GC.Collect(); MessageBox.Show("File : " + fileName + ".xls saved.", "Message", MessageBoxButtons.OK, MessageBoxIcon.Information); return true; } //CellFormatting Event private void mgrdContentDatabase_CellFormatting(object sender, DataGridViewCellFormattingEventArgs e) { if(this.mgrdContentDatabase.Columns[e.ColumnIndex].HeaderText== "Size(GB)") { if (e.Value != null) { CovertFileSize(e); } } } //convert to file size private void CovertFileSize(DataGridViewCellFormattingEventArgs formatting) { if (formatting.Value != null) { try { long bytes; bytes = Convert.ToInt64(formatting.Value); string size = "0 Bytes"; //GB if (bytes >= 1073741824.0) size = String.Format("{0:##.##}", bytes / 1073741824.0) + " GB"; //MB else if (bytes >= 1048576.0) size = String.Format("{0:##.##}", bytes / 1048576.0) + " MB"; //KB else if (bytes >= 1024.0) size = String.Format("{0:##.##}", bytes / 1024.0) + " KB"; //Bytes else if (bytes > 0 && bytes < 1024.0) size = bytes.ToString() + " Bytes"; formatting.Value = size; formatting.FormattingApplied = true; } catch(FormatException) { formatting.FormattingApplied = false; } } } 

我想将转换后的数据导出为ex​​cel。

请帮助我如何修复或添加我的代码

谢谢

Answer 1

您应该使用单元格的FormattedValue属性：

 string value = string.Format("{0}" , dataGridView1.Rows[r].Cells[i].FormattedValue);