asp.net的常用代码

 
0.用session判断是否登陆
if(Session["login"] == null)
   {
    Response.Redirect("error.aspx");
   }
1. 打开新的窗口并传送参数：
传送参数：
response.write("<script>window.open('*.aspx?id="+this.DropDownList1.SelectIndex+"&id1="+...+"')</script>")
接收参数：
string a  = Request.QueryString("id");
string b  = Request.QueryString("id1");
2.为按钮添加对话框
Button1.Attributes.Add("onclick","return confirm('确认?')");
button.attributes.add("onclick","if(confirm('are you sure...?')){return true;}else{return false;}")
3.删除表格选定记录
int intEmpID = (int)MyDataGrid.DataKeys[e.Item.ItemIndex];
string deleteCmd = "DELETE from Employee where emp_id = " + intEmpID.ToString()
4.删除表格记录警告
private void DataGrid_ItemCreated(Object sender,DataGridItemEventArgs e)
{
switch(e.Item.ItemType)
{
  case ListItemType.Item :
  case ListItemType.AlternatingItem :
  case ListItemType.EditItem:
    TableCell myTableCell;
    myTableCell = e.Item.Cells[14];
    LinkButton myDeleteButton ;
    myDeleteButton = (LinkButton)myTableCell.Controls[0];
    myDeleteButton.Attributes.Add("onclick","return confirm('您是否确定要删除这条信息');");
    break;
  default:
  break;
}
}
5.点击表格行链接另一页
private void grdCustomer_ItemDataBound(object sender, System.Web.UI.WebControls.DataGridItemEventArgs e)
{
//点击表格打开
if (e.Item.ItemType == ListItemType.Item || e.Item.ItemType == ListItemType.AlternatingItem)
e.Item.Attributes.Add("onclick","window.open('Default.aspx?id=" + e.Item.Cells[0].Text + "');");
}
双击表格连接到另一页
在itemDataBind事件中
if(e.Item.ItemType == ListItemType.Item || e.Item.ItemType == ListItemType.AlternatingItem)
  {
string OrderItemID =e.item.cells[1].Text;
...
e.item.Attributes.Add("ondblclick", "location.href='../ShippedGrid.aspx?i