private void DataGrid1_ItemDataBound(object sender, System.Web.UI.WebControls.DataGridItemEventArgs e)
{
SqlConnection conn=new SqlConnection(System.Configuration.ConfigurationSettings.AppSettings["conn"]);
SqlDataAdapter da=new SqlDataAdapter("select * from dep",conn);
DataSet ds=new DataSet();
da.Fill(ds,"table1");
if(e.Item.ItemType==ListItemType.EditItem)
{
DropDownList ddl=(DropDownList)e.Item.FindControl("dep");
ddl.DataSource=ds.Tables["table1"];
ddl.DataTextField="depname";
ddl.DataValueField="depid";
ddl.DataBind();
ddl.Items.FindByValue(Convert.ToString(DataBinder.Eval(e.Item.DataItem,"depid"))).Selected=true;
TextBox txt1 = (TextBox)e.Item.Cells[0].Controls[0];
txt1.Attributes.Add("style","border-color:Red;border-width:1px;border-style:Solid;");//设置文本框的样式
//注意：Cells[i].Controls[i] 表示第i+1列的第i+1个控件，你需要改成你自己的列
}
}