ASP.NET常用语句

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1.//弹出对话框.点击转向指定页面
Response.Write(" <script>window.alert('该会员没有提交申请,请重新提交!')

</script>");
Response.Write(" <script>window.location

='http://www.51aspx.com/bizpulic/upmeb.aspx' </script>");

2.//弹出对话框
Response.Write(" <script language='javascript'>alert('产品添加成功!')

</script >");
3.//删除文件
string filename ="20059595157517.jpg";
pub.util.DeleteFile(HttpContext.Current.Server.MapPath("../file/")

+filename);


4.//绑定下拉列表框datalist
System.Data.DataView dv=conn.Exec_ex("select -1 as code,'请选择经营模式'

as content from dealin union select code,content from dealin");
this.dealincode.DataSource=dv;
this.dealincode.DataTextField="content";
this.dealincode.DataValueField="code";
this.dealincode.DataBind();
this.dealincode.Items.FindByValue(dv[0]["dealincode"].ToString

()).Selected=true;

5.//时间去秒显示

<%# System.DateTime.Parse(DataBinder.Eval

(Container.DataItem,&quot;begtime&quot;).ToString()).ToShortDateString()%>


6.//标题带链接

<%# &quot; <a class=/&quot;12c/&quot; target=/&quot;_blank/&quot;

href=/&quot;http://www.51aspx/CV/_&quot;+DataBinder.Eval

(Container.DataItem,&quot;procode&quot;)+&quot;.html/&quot;>&quot;+

DataBinder.Eval(Container.DataItem,&quot;proname&quot;)+&quot; </a>&quot;%>

7.//修改转向

<%# &quot; <A href=/&quot;editpushpro.aspx?id=&quot;+DataBinder.Eval

(Container.DataItem,&quot;code&quot;)+&quot;/&quot;>&quot;+&quot;修改

&quot;+&quot; </A>&quot;%>

8.//弹出确定按钮

<%# &quot; <A id=/&quot;btnDelete/&quot; onclick=/&quot;return confirm('你是否

确定删除这条记录吗?');/&quot; href=/&quot;pushproduct.aspx?

dl=&quot;+DataBinder.Eval(Container.DataItem,&quot;code&quot;)

+&quot;/&quot;>&quot;+&quot;删除&quot;+&quot; </A>&quot;%>

9.//输出数据格式化 "{0:F2}" 是格式 F2表示小数点后剩两位

<%# DataBinder.Eval(Container, &quot;DataItem.PriceMoney&quot;,&quot;{0:F2}

&quot;) %>

10.//提取动态网页内容


Uri uri = new Uri("http://www.51aspx.com/");
WebRequest req = WebRequest.Create(uri);
WebResponse resp = req.GetResponse();
Stream str = resp.GetResponseStream();
StreamReader sr = new StreamReader(str,System.Text.Encoding.Default);
string t = sr.ReadToEnd();
this.Response.Write(t.ToString());

11.//获取" . "后面的字符


i.ToString().Trim().Substring(i.ToString().Trim().LastIndexOf(".")

+1).ToLower().Trim()


12. 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");


12.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;}")

13.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()

14.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;
  }
}

15.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 + "’)");
}

16.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")%>’ /


17.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=’’;");
}

18.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"))
19.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
20.清空Cookie

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