数据导入Excel问题
怎样在将数据导入Excel时，在Excel中画真线及矩形

------解决方案--------------------
try
...{ string filename;
SaveFileDialog sfd = new SaveFileDialog();
sfd.Title = "请选择将导出的EXCEL文件存放路径 ";
sfd.Filter= "excel文档(*.xls)|*.xls ";
//sfd.OpenFile();
sfd.ShowDialog();
if (sfd.FileName != " ")
...{
if(sfd.FileName.LastIndexOf( ".xls ") <=0)
...{
sfd.FileName=sfd.FileName+ ".xls ";
}
filename=sfd.FileName;
if(System.IO.File.Exists(filename))
...{
System.IO.File.Delete(filename);
}
Excel.ApplicationClass xlApp = new Excel.ApplicationClass();
if (xlApp == null)
...{
MessageBox.Show( "无法创建Excel对象，可能您的机器未安装Excel ");
return;
}
Excel.Workbooks workbooks = xlApp.Workbooks;
Excel.Workbook workbook = workbooks.Add(Excel.XlWBATemplate.xlWBATWorksheet);
Excel.Worksheet worksheet = (Excel.Worksheet)workbook.Worksheets[1];
DataTable dt1 = (DataTable)dataGrid2.DataSource;
float percent=0;
long rowRead=0;
if(dt1==null)
...{
MessageBox.Show( "1 ");
return;
}
long totalCount=dt1.Rows.Count;
this.progressBar1.Visible=true;
for (int i = 0; i < dt1.Rows.Count; i++)
...{
this.progressBar1.Value=i;
for (int j = 0; j < dt1.Columns.Count; j++)
...{
if (i == 0)
...{
worksheet.Cells[1, j + 1] = dt1.Columns[j].ColumnName;
}
worksheet.Cells[i + 2, j + 1] = dt1.Rows[i][j].ToString();
}
rowRead++;
percent=((float)(100*rowRead))/totalCount;
this.progressBar1.Text= "正在导出数据[ "+ percent.ToString( "0.00 ") + "%]... ";
}
this.progressBar1.Visible=false;
workbook.Saved = true;
workbook.SaveCopyAs(filename);
System.Runtime.InteropServices.Marshal.ReleaseComObject(worksheet);
worksheet = null;
System.Runtime.InteropServices.Marshal.ReleaseComObject(workbook);
workbook = null;
workbooks.Close();
System.Runtime.InteropServices.Marshal.ReleaseComObject(workbooks);
workbooks = null;
xlApp.Quit();
System.Runtime.InteropServices.Marshal.ReleaseComObject(xlApp);
xlApp = null;
MessageBox.Show( "导出Excel完成! ", "提示 ",MessageBoxButtons.OK,MessageBoxIcon.Information);
//button2_Click(null,null);

}
}
catch(Exception ex)
...{
MessageBox.Show( "导出Excel失败! "+ex.Message, "错误 ",MessageBoxButtons.OK,MessageBoxIcon.Information);
}

先要添加EXCEL的引用，这代码可以直接运行的