常用代码收藏
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,"begtime").ToString()).ToShortDateString()%> 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("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