ASP.NET常用服务器控件方法及属性

发表日期：2015-09-26 文章编辑：南昌开优网络浏览次数：3914 标签：ASP.NET应用

//控件DorpDownList

ddltitle.DataSource=new Xiaobin.Shop.DAL.HelpDAL().GetList(""); //指定数据源

ddltitle.DataTextField="title"; //显示的文本

ddltitle.DataValueField="id"; //选择的字段

ddltitle.DataBind(); //绑定

ddltitle.Items.Add(new ListItem("选择类别", "0")); //在数据源最后加上一项

ddltitle.Items.Insert(0,new ListItem("选择类别", "0")); //在指定的位置加上一项

//绑定DataSet数据

string title=Request.QueryString["title"];

if(string.IsNullOrEmpty(title))

{

title="关于我们";

}

litH1.Text=title;

title=xiaobin.Utility.Tool.GetSafeSQL(title);

DataSet ds=new DAL.HelpDAL().GetList("title='"+title+"'"); //绑定DataSet

if(ds.Tables.Count>0&&ds.Table[0].Rows.Count>0) //如果表的数量和第一个表的行数大于0

{

litbody.Text=ds.Table[0].Rows[0]["body"].ToString(); //取出第一个表的第一行的数据

}

//Repeater的内循环事件

外循环

private void BindRep()

{

rep.DataSource = dao.GetList("*", "createdate", "asc", anp.PageSize, anp.CurrentPageIndex, GetCond());

rep.DataBind();

}

内循环双击事件中的ItemDataBound 如显示楼层方法

int x = 0;

protected void rep_ItemDataBound(object sender, RepeaterItemEventArgs e)

{

if (e.Item.ItemType == ListItemType.AlternatingItem || e.Item.ItemType == ListItemType.Item)

{

Panel pan = e.Item.FindControl("pan") as Panel; //FindControl 尝试转换及rep控件的服务器控件

Literal litx = e.Item.FindControl("litx") as Literal;

Literal litreply = e.Item.FindControl("litreply") as Literal;

if (litreply.Text.Trim().Length == 0)

{

pan.Visible = false;

}

else

{

pan.Visible = true;

}

litx.Text = (anp.StartRecordIndex + x).ToString(); //StartRecordIndex 为anp控件中的当前索引升序排序

litx.Text=(anp.RecordCount - (anp. StartRecordIndex + x).Tostring()); //降序排序

x++;

}

//Repeater控件的嵌套使用

//绑定顶级分类

repca1.DataSource = new DAL.CategoryDAL().GetListArray("pid=0");

repca1.DataBind();

//循环repca1

protected void repca1_ItemDataBound(object sender, RepeaterItemEventArgs e)

{

//ListItemType.Item 奇数行 ListItemType.AlternatingItem 偶数行

if (e.Item.ItemType == ListItemType.AlternatingItem || e.Item.ItemType == ListItemType.Item)

{

Repeater repca2 = e.Item.FindControl("repca2") as Repeater;

//在rep1中加上隐藏域用于绑定rep2即 value='<%#Eval("id")>'

HiddenField hfid1 = e.Item.FindControl("hfid1") as HiddenField;

Repeater repca3 = e.Item.FindControl("repca3") as Repeater;

repca2.DataSource = new DAL.CategoryDAL().GetListArray("pid=" + hfid1.Value);

repca2.DataBind();

}

//循环repca2

protected void repca2_ItemDataBound(object sender, RepeaterItemEventArgs e)

{

if (e.Item.ItemType == ListItemType.AlternatingItem || e.Item.ItemType == ListItemType.Item)

{

Repeater repca3 = e.Item.FindControl("repca3") as Repeater;

HiddenField hfid2 = e.Item.FindControl("hfid2") as HiddenField;

repca3.DataSource = new DAL.CategoryDAL().GetListArray("pid=" + hfid2.Value);

repca3.DataBind();

}

//Repeater控件的分割属性

SeparatorTemplate

//通过Model获取RadioButtonList、DropDownList选中的值

ListItem li = rademail.Items.FindByValue(model.isopenemail.ToString()); //

if (li != null)

{

li.Selected = true; //列表项等于model中的字段值时为真及显示选中的字段

}

li = radsex.Items.FindByValue(model.sex.ToString());

if (li != null)

{

li.Selected = true;

}

li = ddlprovince.Items.FindByValue(model.province);

ddlprovince.ClearSelection(); //清空dll再重新获取

if (li != null)

{

li.Selected = true;

}

li = ddlcity.Items.FindByValue(model.city);

ddlcity.ClearSelection();

if (li != null)

{

li.Selected = true;

}

//DropDownList的条件绑定

选择查看方式：

<asp:DropDownList ID="ddlorder" runat="server" AutoPostBack="True" OnSelectedIndexChanged="ddlorder_SelectedIndexChanged">

<asp:ListItem Text="↓按上架时间降序排列" Value="0"></asp:ListItem>

<asp:ListItem Text="↑按上架时间升序排列" Value="1"></asp:ListItem>

<asp:ListItem Text="↓按会员价降序排列" Value="2"></asp:ListItem>

<asp:ListItem Text="↑按会员价升序排列" Value="3"></asp:ListItem>

</asp:DropDownList>

//绑定列表

private void BindRep()

{

string order = "createdate";

string ordertype = "desc";

switch (ddlorder.SelectedValue)

{

case "0":

order = "createdate";

ordertype = "desc";

break;

case "1":

order = "createdate";

ordertype = "asc";

break;

case "2":

order = "memberprice";

ordertype = "desc";

break;

case "3":

order = "memberprice";

ordertype = "asc";

break;

default:

break;

}

rep.DataSource = new DAL.ProductDAL.GetList("*", order, ordertype, anp.PageSize, anp.CurrentPageIndex, GetCond());

rep.DataBind();

}

//选择排序方式

protected void ddlorder_SelectedIndexChanged(object sender, EventArgs e)

{

BindRep();

}

TextMode="MultiLine" 前台显示原样显示出box.Replace("\n", "<br />") //把换行替换成br

.Net中页面刷新时保持滚动条不动

<%@ Page Language="C#" CodeFile="Default.aspx.cs" Inherits="Default" Title="" MaintainScrollPositionOnPostback="true" %>

MaintainScrollPositionOnPostback属性可以让滚动条回到原位置

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