C# DataGridView 导出 Excel(根据Excel版本显示选择不同后缀格式xls或xlsx)

/// <summary>
/// DataGridView导出至Excel,解决问题:打开Excel文件格式与扩展名指定格式不一致
/// </summary>
/// <param name="dataGridView">数据源表格</param>
/// <param name="isShowExcle">导出时是否显示excel界面</param>
/// <returns></returns>
public static bool DcExcel(DataGridView dataGridView, bool isShowExcle = true)
{
int FormatNum;//保存excel文件的格式
Excel.Application excel = new Excel.Application();
string excelVersion = excel.Version;//获取你使用的excel 的版本号

//声明保存对话框
SaveFileDialog saveFileDialog = new SaveFileDialog();
//默然文件后缀
saveFileDialog.DefaultExt = "xls";

if (Convert.ToDouble(excelVersion) < 12)//You use Excel 97-2003
{
FormatNum = -4143;
//文件后缀列表
saveFileDialog.Filter = "Excel(*.xls)|*.xls";
}
else//you use excel 2007 or later
{
FormatNum = 56;
//文件后缀列表
saveFileDialog.Filter = "Excel(*.xls)|*.xls|Excel(2007-2016)(*.xlsx)|*.xlsx";
}
Form fr = dataGridView.Parent as Form;
if (fr != null)//默认文件名
{
saveFileDialog.FileName = fr.Text;
}
//默然路径是系统当前路径
saveFileDialog.InitialDirectory = Directory.GetCurrentDirectory();
//打开保存对话框
if (saveFileDialog.ShowDialog() == DialogResult.Cancel)
return false;
//返回文件路径
string fileName = saveFileDialog.FileName;
if (string.IsNullOrEmpty(fileName.Trim()))
{ return false; }

if (dataGridView.Rows.Count == 0)
return false;
//建立Excel对象

var objWorkbook = excel.Application.Workbooks.Add(true);
excel.Visible = isShowExcle;
//生成字段名称
for (int i = 0; i < dataGridView.ColumnCount; i++)
{
excel.Cells[1, i + 1] = dataGridView.Columns[i].HeaderText;
excel.Cells[1, i + 1].Font.Bold = true;
}
//填充数据
for (int i = 0; i < dataGridView.RowCount - 1; i++)
{
for (int j = 0; j < dataGridView.ColumnCount; j++)
{
if (dataGridView[j, i].ValueType == typeof(string))
{
excel.Cells[i + 2, j + 1] = "'" + dataGridView[j, i].Value.ToString();
}
else
{
excel.Cells[i + 2, j + 1] = dataGridView[j, i].Value.ToString();
}
}
}
//Excel.XlFileFormat.xlOpenXMLWorkbook（.xlsx）
//Excel.XlFileFormat.xlExcel8（Excel97 - 2003, .xls）
　　　　　　　//判断excel文件的保存格式是xls还是xlsx
var format = fileName.EndsWith(".xls") ? Excel.XlFileFormat.xlExcel8 : Excel.XlFileFormat.xlOpenXMLWorkbook;
objWorkbook.SaveAs(fileName, format, Missing.Value, Missing.Value, Missing.Value,
Missing.Value, Excel.XlSaveAsAccessMode.xlShared, Missing.Value, Missing.Value, Missing.Value,
Missing.Value, Missing.Value);
return true;
}