导出DataGridView数据到Excel表

两个办法：

第一种针对所有的想都是汉字数字，日期和超过string长度的项不能正常显示

//选择创建文件的路径
SaveFileDialog save = new SaveFileDialog();
save.Filter = "excel files(*.xls)|*.xls";
save.Title = "请选择要导出数据的位置";
save.FileName = name+DateTime.Now.ToLongDateString();
if (save.ShowDialog() == DialogResult.OK)
{
string fileName=save.FileName;
//MessageBox.Show(save.FileName);
// 创建Excel对象
Microsoft.Office.Interop.Excel.Application excel = new Microsoft.Office.Interop.Excel.ApplicationClass();
if (excel == null)
{
MessageBox.Show("Excel无法启动", "提示");
return;
}
//创建Excel工作薄
Microsoft.Office.Interop.Excel.Workbook excelBook = excel.Workbooks.Add(true);
Microsoft.Office.Interop.Excel.Worksheet excelSheet = (Microsoft.Office.Interop.Excel.Worksheet)excelBook.Worksheets[1];
//excel.Application.Workbooks.Add(true);
//生成字段名称
int k = 0;
for (int i = 0; i < dgv.ColumnCount; i++)
{
if (dgv.Columns[i].Visible) //不导出隐藏的列
{
excel.Cells[1, k + 1] = dgv.Columns[i].HeaderText;
k++;
}
}
//填充数据
for (int i = 0; i < dgv.RowCount; i++)
{
k = 0;
for (int j = 0; j < dgv.ColumnCount; j++)
{
if (dgv.Columns[j].Visible) //不导出隐藏的列
{
if (dgv[j, i].ValueType == typeof(string))
{
excel.Cells[i + 2, k + 1] = "" + dgv[j, i].Value.ToString();
}
else
{
excel.Cells[i + 2, k + 1] = dgv[j, i].Value.ToString();
}
}
k++;
}
}
try
{
excelBook.Saved = true;
excelBook.SaveCopyAs(fileName);
}
catch
{
MessageBox.Show("导出失败，文件可能正在使用中","提示");
}

第二种适合所有的数据

try
{
if (dataGridView.RowCount <= 0)
{
MessageBox.Show("没有数据可以保存", "提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
return;
}
string saveFileName = string.Empty;
SaveFileDialog saveDialog = new SaveFileDialog();
saveDialog.DefaultExt = "xls";
saveDialog.Filter = "Excel文件|*.xls";
saveDialog.FileName = strFileName;
saveDialog.ShowDialog();
saveFileName = saveDialog.FileName;
if (saveFileName.IndexOf(":") < 0) return;
Excel.Application myExcelApp = new Excel.Application();
if (myExcelApp == null)
{
MessageBox.Show("无法创建Excel对象，可能您的机子未安装Excel", "提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
return;
}
Excel.Workbooks workbooks = myExcelApp.Workbooks;
Excel.Workbook workbook = workbooks.Add(Excel.XlWBATemplate.xlWBATWorksheet);
Excel.Sheets sheets = workbook.Worksheets;
Excel.Worksheet worksheet = (Excel.Worksheet)sheets.get_Item(1);
Excel.Range range;
object oMis = System.Reflection.Missing.Value;
//显示为文本格式
range = worksheet.get_Range(worksheet.Cells[1, 1], worksheet.Cells[dataGridView.RowCount + 1, dataGridView.ColumnCount]);
range.NumberFormatLocal = "@";
//读入数据
//标题行
for (int i = 0; i < dataGridView.ColumnCount; i++)
{
if (dataGridView.Columns[i].Visible)
{
worksheet.Cells[1, i + 1] = dataGridView.Columns[i].HeaderText.ToString().Trim();
}
}
for (int r = 0; r < dataGridView.RowCount; r++)
{
for (int i = 0; i < dataGridView.ColumnCount; i++)
{
if (dataGridView.Columns[i].Visible)
{
worksheet.Cells[r + 2, i + 1] = dataGridView.Rows[r].Cells[i].Value.ToString().Trim();
}
}
}
range = worksheet.get_Range(worksheet.Cells[1, 1], worksheet.Cells[dataGridView.RowCount + 1, dataGridView.ColumnCount]);
range.Columns.AutoFit();
range.RowHeight = 18;
range.HorizontalAlignment = Excel.XlHAlign.xlHAlignLeft;
#region 设置表格边框样式
//range.BorderAround(Excel.XlLineStyle.xlContinuous, Excel.XlBorderWeight.xlThin, Excel.XlColorIndex.xlColorIndexAutomatic, null);
//range.Borders[Excel.XlBordersIndex.xlInsideHorizontal].ColorIndex = Excel.XlColorIndex.xlColorIndexAutomatic;
//range.Borders[Excel.XlBordersIndex.xlInsideHorizontal].LineStyle = Excel.XlLineStyle.xlContinuous;
//range.Borders[Excel.XlBordersIndex.xlInsideHorizontal].Weight = Excel.XlBorderWeight.xlThin;
//if (dataGridView.ColumnCount > 1)
//{
// range.Borders[Excel.XlBordersIndex.xlInsideVertical].ColorIndex = Excel.XlColorIndex.xlColorIndexAutomatic;
// range.Borders[Excel.XlBordersIndex.xlInsideVertical].LineStyle = Excel.XlLineStyle.xlContinuous;
// range.Borders[Excel.XlBordersIndex.xlInsideVertical].Weight = Excel.XlBorderWeight.xlThin;
//}
#endregion
//保存
if (saveFileName != string.Empty)
{
try
{
workbook.Saved = true;
workbook.SaveCopyAs(saveFileName);
}
catch (Exception ex)
{
MessageBox.Show("导出文件时出错,文件可能正被打开！\n" + ex.Message, "提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
}
}
else
{
MessageBox.Show("文件名不能为空", "提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
}
myExcelApp.Visible = false;
myExcelApp.Quit();
GC.Collect();//强行销毁
}
catch (Exception ex)
{
MessageBox.Show(ex.ToString(), "提示", MessageBoxButtons.OK, MessageBoxIcon.Warning);
}