在ASP.NET中绑定嵌套的datalist [英] Binding nested datalist in ASP.NET
问题描述
我有嵌套的datalist。父级datalist显示答案，子级datalist显示特定答案的注释。假设有2个答案，第1个答案有2条评论hi，Hello，第2个答案有1条评论欢迎。然后它应该显示如下：
示例：
-------------------------- -
答案1
hi
你好
答案2
欢迎
-----------------------------
但它显示如下：
---------------------------- -
答案1
hi
你好
hi
你好
答案2
欢迎
欢迎
----------------------------------------------- ------------------
下面是ASPX的代码和C＃
-------- -------------------------------------------------- --------
ASPX：
------------------------ -
< asp：ScriptManager ID = ScriptManager1 runat = server > < / asp：ScriptManager >
< asp：UpdatePanel ID = UpdatePanel1 runat = 服务器 >
< ContentTemplate >
< asp：DataList < span class =code-attribute> ID = dlAnswers runat = server RepeatColumns = 1 RepeatDirection = 垂直 OnItemCommand = Datalist_Answer DataKeyField = 援助 OnItemDataBound = dlAnswers_ItemDataBound >
< ItemTemplate >
< div class = comment-body comment-body-answers clearfix >
< div class = 头像 >
< < span class =code-leadattribute> asp：Image ID = ProfileImg runat = server ImageUrl =' <％ #Eval（ ProfileImg）％>' / >
< / div >
< div class = comment-text >
< div class = 作者clearfix >
< div 类 = comment-meta >
< span > 作者：< a href = ＃ > <％ #Eval（ FirstName）+ + Eval（ LastName）％> < / a > < / span >
< div class = date > < i class = icon-time > < / i > 发布于：<％ #Eval（ AnsDate）％> < ; / div >
< a class = 按钮小绿色按钮 href = ＃ style = float：right; padding：5px 15px; margin-left：300px; text-align：center; width：130px; font-size：12px; margin-top：-20px > 接受解决方案< / a >
< / div >
< / div >
< br / >
< div class = clearfix > < / div >
< div class = text >
< asp：Label ID = lblAnswer runat = server 文本 =' <％ #Eval（ 描述）％>' > < / asp：Label >
< / div >
< br / >
< span class =code-keyword>< div id = AnsCommentBox class = 问题解答的问题-answered-DONE >
< asp：DataList ID = dlAnswerComment runat = 服务器 RepeatDirection = 垂直 >
< ItemTemplate >
< ul class = 儿童 >
< li class = comment >
< div class = comment-body clearfix >
< div class = 评论文字 >
< div class = 作者clearfix >
< div class = comment-author > < a < span class =code-attribute> hre f = ＃ > <％ #Eval（ FirstName ）+ + Eval（ LastName）％> < / a > < / div >
< div class = comment-meta >
< div class = date > < i class = icon-time > < / i > <％ #Eval（ AnsCDate）％> < / div >
< / div >
< / div >
< div class = text >
< p < span class =code-keyword>> < asp：Label ID = lblAns注释 runat = server 文本 =' <％ #Eval（ AnsComments）％>' > < / asp：标签 > < / p >
< / div >
< / div >
< / div >
< / li >
< / ul >
< / ItemTemplate >
< / asp：DataList >
< span class =code-keyword>< asp：Button ID = btnComment runat = < span class =code-keyword> server 文本 = 有评论吗？ CssClass = 按钮小蓝色按钮 CommandName = GenerateCommentBox / >
< asp：Panel ID = PlComment runat = server 可见 = false >
< asp：TextBox ID = txtAnswerComment runat = server TextMode = MultiLine CssClass = noresize > < span class =code-keyword>< / asp：TextBox >
< asp：按钮 ID = btnSumbit runat = server CssClass = button small blue-button < span class =code-attribute> 文本 = 提交 字体大小 = 12px CommandName = SubmitComment / >
< < span class =code-leadattribute> asp：按钮 ID = btnCa ncel runat = server CssClass = 按钮小红色按钮 文字 = 取消 字体大小 = 12px CommandName = CancelButton / >
< / asp：Panel >
< / div >
< / div >
< ; / div >
< hr / >
< / ItemTemplate >
< / asp：DataList >
< / ContentTemplate >
< / asp：UpdatePanel >
------------------------------------------------- ---------------------
C＃
------------ -------------------------------------------------- -------
protected void Page_Load（ object sender，EventArgs e）
{
if （！IsPostBack）
{
LoadAnswers（）;
}
}
private void LoadAnswers（）
{
li.QuestionID = Convert.ToInt32（Request.QueryString [ QID]）;
dlSingleQuestion.DataSource = li.Get_Question_By_Id（li）;
dlSingleQuestion.DataBind（）;
dlAnswers.DataSource = li.Get_All_Answers（li）;
dlAnswers.DataBind（）;
}
protected void dlAnswers_ItemDataBound（ object sender，DataListItemEventArgs e）
{
DataList dl =（DataList）e.Item.FindControl（ dlAnswerComment）;
li.AnswerID = Convert.ToInt32（dlAnswers.DataKeys [e.Item.ItemIndex] .ToString（））;
dl.DataSource = li.Get_All_Answer_Comment（li）;
dl.DataBind（）;
}
我的尝试：
我应该使用转发器控制还是Datalist可以......
请从以下给定链接中获取一些帮助：
ASP.NET中的嵌套数据列表 [ ^ ]
I have nested datalist. Parent datalist displays answers and child datalist displays comments for a particular answer. Suppose there are 2 answers and for 1st answer there are 2 comments "hi","Hello" and for 2nd answer there is 1 comment "Welcome". Then it should display like:
Example:
----------------------------
Answer 1
"hi"
"hello"
Answer 2
"Welcome"
-----------------------------
But it is displaying like:
-----------------------------
Answer 1
"hi"
"hello"
"hi"
"hello"
Answer 2
"Welcome"
"Welcome"
-----------------------------------------------------------------
Below is the code of ASPX and C#
------------------------------------------------------------------
ASPX:
-------------------------
<asp:ScriptManager ID="ScriptManager1" runat="server"></asp:ScriptManager>
<asp:UpdatePanel ID="UpdatePanel1" runat="server">
<ContentTemplate>
<asp:DataList ID="dlAnswers" runat="server" RepeatColumns="1" RepeatDirection="Vertical" OnItemCommand="Datalist_Answer" DataKeyField="Aid" OnItemDataBound="dlAnswers_ItemDataBound" >
<ItemTemplate>
<div class="comment-body comment-body-answered clearfix">
<div class="avatar">
<asp:Image ID="ProfileImg" runat="server" ImageUrl='<%#Eval("ProfileImg") %>' />
</div>
<div class="comment-text">
<div class="author clearfix">
<div class="comment-meta">
<span>Author :<a href="#"> <%#Eval("FirstName")+" "+Eval("LastName") %></a></span>
<div class="date"><i class="icon-time"></i>Posted on: <%#Eval("AnsDate") %></div>
<a class="button small green-button" href="#" style="float:right;padding:5px 15px;margin-left:300px;text-align:center;width:130px;font-size:12px;margin-top:-20px">Accept Solution</a>
</div>
</div>
<br />
<div class="clearfix"></div>
<div class="text">
<asp:Label ID="lblAnswer" runat="server" Text='<%#Eval("Description")%>'></asp:Label>
</div>
<br />
<div id="AnsCommentBox" class="question-answered question-answered-done">
<asp:DataList ID="dlAnswerComment" runat="server" RepeatDirection="Vertical">
<ItemTemplate>
<ul class="children">
<li class="comment">
<div class="comment-body clearfix">
<div class="comment-text">
<div class="author clearfix">
<div class="comment-author"><a href="#"><%#Eval("FirstName")+" "+ Eval("LastName") %></a></div>
<div class="comment-meta">
<div class="date"><i class="icon-time"></i><%#Eval("AnsCDate") %></div>
</div>
</div>
<div class="text">
<p><asp:Label ID="lblAnsComment" runat="server" Text='<%#Eval("AnsComments")%>'></asp:Label></p>
</div>
</div>
</div>
</li>
</ul>
</ItemTemplate>
</asp:DataList>
<asp:Button ID="btnComment" runat="server" Text="Have a Comment?" CssClass="button small blue-button" CommandName="GenerateCommentBox" />
<asp:Panel ID="PlComment" runat="server" Visible="false" >
<asp:TextBox ID="txtAnswerComment" runat="server" TextMode="MultiLine" CssClass="noresize"></asp:TextBox>
<asp:Button ID="btnSumbit" runat="server" CssClass="button small blue-button" Text="Submit" Font-Size="12px" CommandName="SubmitComment" />
<asp:Button ID="btnCancel" runat="server" CssClass="button small red-button" Text="Cancel" Font-Size="12px" CommandName="CancelButton"/>
</asp:Panel>
</div>
</div>
</div>
<hr />
</ItemTemplate>
</asp:DataList>
</ContentTemplate>
</asp:UpdatePanel>
----------------------------------------------------------------------
C#
---------------------------------------------------------------------
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
LoadAnswers();
}
}
private void LoadAnswers()
{
li.QuestionID = Convert.ToInt32(Request.QueryString["qid"]);
dlSingleQuestion.DataSource = li.Get_Question_By_Id(li);
dlSingleQuestion.DataBind();
dlAnswers.DataSource = li.Get_All_Answers(li);
dlAnswers.DataBind();
}
protected void dlAnswers_ItemDataBound(object sender, DataListItemEventArgs e)
{
DataList dl = (DataList)e.Item.FindControl("dlAnswerComment");
li.AnswerID = Convert.ToInt32(dlAnswers.DataKeys[e.Item.ItemIndex].ToString());
dl.DataSource = li.Get_All_Answer_Comment(li);
dl.DataBind();
}
What I have tried:
Shall I use repeater control or Datalist is OK...
Please take some help from the given link below:
Nested DataList in ASP.NET[^]
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