Tôi cố gắng để sao chép dữ liệu DataGridView sang Excel và tôi đang sử dụng mã này:Cách đơn giản để Xuất DataGridView sang Excel
public static void ExportToExcel(DataGridView dgView)
{
Microsoft.Office.Interop.Excel.Application excelApp = null;
try
{
// instantiating the excel application class
object misValue = System.Reflection.Missing.Value;
excelApp = new Microsoft.Office.Interop.Excel.Application();
Microsoft.Office.Interop.Excel.Workbook currentWorkbook = excelApp.Workbooks.Add(Type.Missing);
Microsoft.Office.Interop.Excel.Worksheet currentWorksheet = (Microsoft.Office.Interop.Excel.Worksheet)currentWorkbook.ActiveSheet;
currentWorksheet.Columns.ColumnWidth = 18;
if (dgView.Rows.Count > 0)
{
currentWorksheet.Cells[1, 1] = DateTime.Now.ToString("s");
int i = 1;
foreach (DataGridViewColumn dgviewColumn in dgView.Columns)
{
// Excel work sheet indexing starts with 1
currentWorksheet.Cells[2, i] = dgviewColumn.Name;
++i;
}
Microsoft.Office.Interop.Excel.Range headerColumnRange = currentWorksheet.get_Range("A2", "G2");
headerColumnRange.Font.Bold = true;
headerColumnRange.Font.Color = 0xFF0000;
//headerColumnRange.EntireColumn.AutoFit();
int rowIndex = 0;
for (rowIndex = 0; rowIndex < dgView.Rows.Count; rowIndex++)
{
DataGridViewRow dgRow = dgView.Rows[rowIndex];
for (int cellIndex = 0; cellIndex < dgRow.Cells.Count; cellIndex++)
{
currentWorksheet.Cells[rowIndex + 3, cellIndex + 1] = dgRow.Cells[cellIndex].Value;
}
}
Microsoft.Office.Interop.Excel.Range fullTextRange = currentWorksheet.get_Range("A1", "G" + (rowIndex + 1).ToString());
fullTextRange.WrapText = true;
fullTextRange.HorizontalAlignment = Microsoft.Office.Interop.Excel.XlHAlign.xlHAlignLeft;
}
else
{
string timeStamp = DateTime.Now.ToString("s");
timeStamp = timeStamp.Replace(':', '-');
timeStamp = timeStamp.Replace("T", "__");
currentWorksheet.Cells[1, 1] = timeStamp;
currentWorksheet.Cells[1, 2] = "No error occured";
}
using (SaveFileDialog exportSaveFileDialog = new SaveFileDialog())
{
exportSaveFileDialog.Title = "Select Excel File";
exportSaveFileDialog.Filter = "Microsoft Office Excel Workbook(*.xlsx)|*.xlsx";
if (DialogResult.OK == exportSaveFileDialog.ShowDialog())
{
string fullFileName = exportSaveFileDialog.FileName;
// currentWorkbook.SaveCopyAs(fullFileName);
// indicating that we already saved the workbook, otherwise call to Quit() will pop up
// the save file dialogue box
currentWorkbook.SaveAs(fullFileName, Microsoft.Office.Interop.Excel.XlFileFormat.xlOpenXMLWorkbook, System.Reflection.Missing.Value, misValue, false, false, Microsoft.Office.Interop.Excel.XlSaveAsAccessMode.xlNoChange, Microsoft.Office.Interop.Excel.XlSaveConflictResolution.xlUserResolution, true, misValue, misValue, misValue);
currentWorkbook.Saved = true;
MessageBox.Show("Exported successfully", "Exported to Excel", MessageBoxButtons.OK, MessageBoxIcon.Information);
}
}
}
catch (Exception ex)
{
MessageBox.Show(ex.Message, "Exception", MessageBoxButtons.OK, MessageBoxIcon.Error);
}
finally
{
if (excelApp != null)
{
excelApp.Quit();
}
}
}
Nhưng khi có hơn 200 000 hồ sơ, lấy nó một thời gian dài để xuất khẩu. Có cách nào nhanh hơn để thực hiện việc này không?
các liên kết này có thể giúp bạn: [link1] (http://stackoverflow.com/a/11742908/1135581) và [link2] (http://www.codeproject.com/Articles/19284/ Export-large-data-from-Gridview-and-Datareader-to) – Rahul