ASP.NET程序中常用代码汇总（一）

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?id= " + OrderItemID + " ’ " );
}
// 双击表格打开新一页
if (e.Item.ItemType == ListItemType.Item || e.Item.ItemType == ListItemType.AlternatingItem)
{
string OrderItemID = e.item.cells[ 1 ].Text;

e.item.Attributes.Add( " ondblclick " , " open(’../ShippedGrid.aspx?id= " + OrderItemID + " ’) " );
}
★特别注意：【 ? id = 】 处不能为 【 ? id = 】

6.表格超连接列传递参数

＜asp:HyperLinkColumn Target="_blank" headertext="ID号" DataTextField="id" NavigateUrl="aaa.aspx?id=’
＜%# DataBinder.Eval(Container.DataItem, "数据字段1")%＞’ & name=’＜%# DataBinder.Eval(Container.DataItem, "数据字段2")%＞’ /＞

7.表格点击改变颜色

if (e.Item.ItemType == ListItemType.Item || e.Item.ItemType == ListItemType.AlternatingItem)
{
e.Item.Attributes.Add( " onclick " , " this.style.backgroundColor=’#99cc00’;
this .style.color = ’buttontext’; this .style.cursor = ’ default ’; " );
}
写在DataGrid的_ItemDataBound里
if (e.Item.ItemType == ListItemType.Item || e.Item.ItemType == ListItemType.AlternatingItem)
{
e.Item.Attributes.Add( " onmouseover " , " this.style.backgroundColor=’#99cc00’;
this .style.color = ’buttontext’; this .style.cursor = ’ default ’; " );
e.Item.Attributes.Add( " onmouseout " , " this.style.backgroundColor=’’;this.style.color=’’; " );
}

8.关于日期格式

日期格式设定
DataFormatString = " {0:yyyy-MM-dd} "
// 我觉得应该在itembound事件中
e.items.cell[ " 你的列 " ].text = DateTime.Parse(e.items.cell[ " 你的列 " ].text.ToString( " yyyy-MM-dd " ))

9.获取错误信息并到指定页面

// 不要使用Response.Redirect,而应该使用Server.Transfer
e.g
// in global.asax
protected void Application_Error(Object sender, EventArgs e) {
if (Server.GetLastError() is HttpUnhandledException)
Server.Transfer( " MyErrorPage.aspx " );

// 其余的非HttpUnhandledException异常交给ASP.NET自己处理就okay了 :)
}
// Redirect会导致post－back的产生从而丢失了错误信息，所以页面导向应该直接在服务器端执行，这样就可以在错误处理页面得到出错信息并进行相应的处理

10.清空Cookie

Cookie.Expires = [DateTime];
Response.Cookies( " UserName " ).Expires = 0