Datalist的三层嵌套

最新推荐文章于 2019-07-04 13:52:22 发布

junmail

最新推荐文章于 2019-07-04 13:52:22 发布

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分类专栏： asp.net 1.1 文章标签： hyperlink asp server string object stylesheet

本文链接：https://blog.youkuaiyun.com/junmail/article/details/1363023

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在开发过程中，经常会遇到嵌套的问题，以下是一个datalist的三层嵌套的例子：
前台*.aspx页面

<%@ Page language="c#" Codebehind="datalist_qiantao_1.aspx.cs" AutoEventWireup="false" Inherits="csharp_test_1.datalist_qiantao" %>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" >

<HTML>

<HEAD>

<title>datalist_qiantao</title>

</HEAD>

<asp:datalist id="DataList1" runat="server" Width="100%" DataKeyField="系统代码" RepeatColumns="0">

<tr>

<td>

</td>

</tr>

<tr>

<td>

<asp:DataList id="DataList2" runat="server" DataKeyField="子系统代码" OnItemDataBound="DataList2_ItemDataBound">

<%#DataBinder.Eval(Container.DataItem,"子系统名称")%>

</font>

<br>

<asp:DataList id="Datalist3" runat="server" RepeatColumns="3" RepeatDirection="Horizontal" DataKeyField="程式代码"

OnItemDataBound="DataList3_ItemDataBound">

<asp:HyperLink id="HyperLink1" runat="server" Target="_blank">

<%#DataBinder.Eval(Container.DataItem,"程式名称")%>

</asp:HyperLink>

</ItemTemplate>

</asp:DataList>

<br>

</ItemTemplate>

</asp:DataList>

</td>

</tr>

</table>

</ItemTemplate>

</asp:datalist>

</form>

var TB = document.getElementsByTagName("img")

var TR

for(i=0;i<TB.length;i++)

{

TR = TB[i]

TR.style.cursor="hand";

TR.attachEvent("onclick",show)

}

function show()

{

//var imgUrl=new Array();

// imgUrl[0]="images/1.gif"

//imgUrl[1]="images/2.gif"

var TD = event.srcElement;

//var node = document.getElementsByName(TD)

var src = TD.getAttribute("src")

var TB = TD.parentElement;

while(TB.tagName != "TABLE")

{

TB = TB.parentElement

}

var TR = TB.rows[1]

if(TR.style.display == "none")

{

TR.style.display = ""

//document.getElementsByName(TD).src=imgUrl[0]

TD.setAttribute("src","images/2.gif")

}

else

{

TR.style.display = "none"

TD.setAttribute("src","images/1.gif")

}

</SCRIPT>

</body>

</HTML>

后台*.cs页面：

using System;

using System.Collections;

using System.ComponentModel;

using System.Data;

using System.Data.SqlClient;

using System.Drawing;

using System.Web;

using System.Web.SessionState;

using System.Web.UI;

using System.Web.UI.WebControls;

using System.Web.UI.HtmlControls;

namespace csharp_test_1

{

/// <summary>

/// datalist_qiantao 的摘要说明。

/// </summary>

public class datalist_qiantao : System.Web.UI.Page

{

protected System.Web.UI.WebControls.ImageButton ImageButton1;

protected System.Web.UI.WebControls.LinkButton LinkButton1;

protected System.Web.UI.WebControls.HyperLink HyperLink1;

protected System.Web.UI.WebControls.HyperLink HyperLink2;

protected System.Web.UI.WebControls.DataList DataList1;

public string strR

{

get {return (string)ViewState["strR"];}

set {ViewState["strR"]=value;}

}

private void Page_Load(object sender, System.EventArgs e)

{

if(!IsPostBack)

{

DataListDataBind();

}

Web 窗体设计器生成的代码

private void DataListDataBind()

{

SqlConnection conn = new SqlConnection("server=172.23.128.214;user=DataUser;pwd=datauserzixun;database=acfv3");

SqlCommand sqlcmd=new SqlCommand("select distinct 系统代码,系统名称 from acf_v_lefttree_Admin_1", conn);

conn.Open();

DataList1.DataSource = sqlcmd.ExecuteReader();

DataList1.DataBind();

conn.Close();

}

protected void DataList2_ItemDataBound(object sender, System.Web.UI.WebControls.DataListItemEventArgs e)

{

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

{

DataList dlDir2=(DataList)sender;

DataList dlDir3=(DataList)e.Item.FindControl("DataList3");

SqlConnection conn = new SqlConnection("server=172.23.128.214;user=DataUser;pwd=datauserzixun;database=acfv3");

conn.Open();

string aa=dlDir2.DataKeys[e.Item.ItemIndex].ToString().Trim();

SqlCommand sqlcmd=new SqlCommand("select distinct 程式代码,程式名称 from acf_v_lefttree_Admin_1 where 子系统代码='" + aa + "' order by 程式代码", conn);

dlDir3.DataSource = sqlcmd.ExecuteReader();

dlDir3.DataBind();

conn.Close();

}

private void DataList1_ItemDataBound(object sender, System.Web.UI.WebControls.DataListItemEventArgs e)

{

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

{

DataList dlDir2=(DataList)e.Item.FindControl("DataList2");

SqlConnection conn = new SqlConnection("server=172.23.128.214;user=DataUser;pwd=datauserzixun;database=acfv3");

conn.Open();

string aa=DataList1.DataKeys[e.Item.ItemIndex].ToString().Trim();

SqlCommand sqlcmd=new SqlCommand("select distinct 子系统代码,子系统名称 from acf_v_lefttree_Admin_1 where 系统代码='" + aa + "' order by 子系统代码", conn);

dlDir2.DataSource = sqlcmd.ExecuteReader();

dlDir2.DataBind();

conn.Close();

}

protected void DataList3_ItemDataBound(object sender, System.Web.UI.WebControls.DataListItemEventArgs e)

{

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

{

DataList dlDir3=(DataList)sender;

string ProgramID=dlDir3.DataKeys[e.Item.ItemIndex].ToString().Trim();

if ((ProgramID.Substring(1,2)=="01" && Convert.ToInt32(ProgramID.Substring(2,2)) < 13)

||(ProgramID.Substring(1,2)=="04" && Convert.ToInt32(ProgramID.Substring(2,2)) < 43)

||(ProgramID.Substring(1,2)=="05" && Convert.ToInt32(ProgramID.Substring(2,2)) < 53)

||(ProgramID.Substring(1,2)=="07" && Convert.ToInt32(ProgramID.Substring(2,2)) < 73)

||(ProgramID.Substring(1,2)=="08" && Convert.ToInt32(ProgramID.Substring(2,2)) < 85)

||(ProgramID.Substring(1,2)=="31" && Convert.ToInt32(ProgramID.Substring(2,2)) < 12)

||(ProgramID.Substring(1,2)=="32" && Convert.ToInt32(ProgramID.Substring(2,2)) < 22)

)

{

this.strR="http://172.23.128.191/Webacf.com.v3/WebacfPublicProgram/SearchPage.aspx?ProgramID="+ProgramID;

}

HyperLink hp1=(HyperLink)e.Item.FindControl("HyperLink1");

hp1.NavigateUrl=this.strR;

}

总结：DataList子控件事件的激发应用客户端激发更为合理