• asp.net 常用代码


    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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  • 原文地址:https://www.cnblogs.com/bluedy1229/p/796468.html
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