ASP.NET程序中常用代码汇总

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

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