Asp.net常用代码

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 ='/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datalistSystem.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,"begtime").ToString()).ToShortDate String()%>6.//标题带链接<%# "<a class=\"12c\" target=\"_blank\" href=\"http://www.51aspx/CV/_"+DataBinder.Eval(Container.DataItem,"procode")+".html\">"+ DataBinder.Eval(Container.DataItem,"proname")+"</a>"%>7.//修改转向<%# "<A href=\"editpushpro.aspx?id="+DataBinder.Eval(Container.DataItem,"code")+"\">"+"修改"+"</A>"%>8.//弹出确定按钮<%# "<A id=\"btnDelete\" onclick=\"return confirm('你是否确定删除这条记录吗?');\" href=\"pushproduct.aspx?dl="+DataBinder.Eval(Container.DataItem,"code")+"\">"+"删除"+"</A>"%>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, "DataItem.PriceMoney","{0:F2}") %>10.//提取动态网页内容Uri uri = new Uri("/");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.Transfere.g// in global.asaxprotected 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CookieCookie.Expires=[DateTime];Response.Cookies("UserName").Expires = 021.自定义异常处理//自定义异常处理类using System;using System.Diagnostics;namespace MyAppException{/// ＜summary＞/// 从系统异常类ApplicationException继承的应用程序异常处理类。