从excel导入数据到DataGridView:
#region Excel文件数据导入DataGidView
/// <summary>
/// 读取excel内的数据,返回DataTable
/// </summary>
/// <param name="strExcelFileName"></param>
/// <returns></returns>
public DataTable ImportExcel(string strExcelFileName)
{
string strConn = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source='" + strExcelFileName + "';Excel 8.0; HDR=YES;IMEX=1;";
string strExcel = string.Format("select * from [{0}$]", "Test");
DataSet ds = new DataSet();
using (OleDbConnection conn = new OleDbConnection(strConn))
{
conn.Open();
OleDbDataAdapter adapter = new OleDbDataAdapter(strExcel, strConn);
adapter.Fill(ds, "sheet1");
return ds.Tables["sheet1"];
}
}
#endregion
将数据从DataGridView导出到excel中:
#region DataGidView数据到导出excel
/// <summary>
/// DataGidView数据到导出excel
/// </summary>
/// <param name="fileName">导出Excel文件名</param>
/// <param name="myDGV">要导出数据的DataGidView</param>
public void ExportExcel(string saveFileName, DataGridView myDGV)
{
Microsoft.Office.Interop.Excel.Application xlApp = new Microsoft.Office.Interop.Excel.Application();
if (xlApp == null)
{
MessageBox.Show("无法创建Excel对象,可能你的机器上没有安装Excel!");
return;
}
Microsoft.Office.Interop.Excel.Workbooks workbooks = xlApp.Workbooks;
Microsoft.Office.Interop.Excel.Workbook workbook = workbooks.Add(Microsoft.Office.Interop.Excel.XlWBATemplate.xlWBATWorksheet);
Microsoft.Office.Interop.Excel.Worksheet worksheet = (Microsoft.Office.Interop.Excel.Worksheet)workbook.Worksheets[1];//取得sheet1
//写入标题
for (int i = 0; i < myDGV.ColumnCount; i++)
{
worksheet.Cells[1, i + 1] = myDGV.Columns[i].HeaderText;
}
//写入数据
for (int r = 0; r < myDGV.Rows.Count; r++)
{
for (int i = 0; i < myDGV.ColumnCount; i++)
{
worksheet.Cells[r + 2, i + 1] = myDGV.Rows[r].Cells[i].Value;
}
System.Windows.Forms.Application.DoEvents();
}
worksheet.Columns.EntireColumn.AutoFit();//列宽自适应
if (saveFileName != "")
{
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);
return;
}
}
xlApp.Quit();
GC.Collect();//强行销毁
}
#endregion
运行界面:
窗口load:
private void ExcelFromTo_Load(object sender, EventArgs e)
{
DataTable dt = new DataTable();
dt = ImportExcel("Test.xls");
dataGridView1.DataSource = dt;
dataGridView1.Columns[0].AutoSizeMode = DataGridViewAutoSizeColumnMode.Fill;
dataGridView1.Columns[1].AutoSizeMode = DataGridViewAutoSizeColumnMode.Fill;
dataGridView1.Columns[2].AutoSizeMode = DataGridViewAutoSizeColumnMode.Fill;
dataGridView1.Columns[0].FillWeight = 40;
dataGridView1.Columns[1].FillWeight = 30;
dataGridView1.Columns[2].FillWeight = 30;
ExportExcel("ttt.xls", dataGridView1);
}