在我的INSERT INTO table2
SELECT * FROM table1;
中 - 有一个隐藏字段,文本框和按钮。
当数据被绑定时,隐藏字段将获得用户ID,如下面的代码
<asp:Repeater></asp:Repeater>
将调用和ItemDataBound事件,在此函数中,我从隐藏字段获取值,并将该值连接为文本框中的Id。如下面的代码
<asp:HiddenField ID="hide" Value='<%#Eval("UserId")%>' runat="server"/>
假设只有一条记录来自数据库且其UserId为1.则文本框ID应为&#34; textReplyArea1&#34;。从现在开始,一切都是正确的。
我不确定,这是将动态ID提供给转发器控件的正确方法,但我认为,这是正确的。
问题 -
当我点击按钮时,我通过从转发器中找到控件从Id获取转发器和文本框中的项目,然后它显示为空。
TextBox txt = (TextBox)e.Item.FindControl("txtReplyArea");
HiddenField hf = (HiddenField)e.Item.FindControl("hide");//1
txt.ID = "txtReplyArea" + hf.Value;//txtReplyArea1
aspx页面代码
int areaId = int.Parse((sender as Button).CommandArgument);//1
string id="txtReplyArea"+areaId;//txtReplyArea1
foreach (RepeaterItem item in repeaterBlog.Items)
{
TextBox tb = item.FindControl(id) as TextBox;//tb = null
}
aspx.cs代码
<%@ Page Title="Messages" Language="C#" MasterPageFile="~/Menu.master" AutoEventWireup="true" CodeFile="Messages.aspx.cs" Inherits="Messages" %>
<asp:Content ID="Content1" ContentPlaceHolderID="head" Runat="Server">
</asp:Content>
<asp:Content ID="Content2" ContentPlaceHolderID="ContentPlaceHolder1" Runat="Server">
<div style="width:70%;">
<asp:Repeater ID="repeaterBlog" runat="server" OnItemDataBound="repeaterBlog_ItemDataBound">
<HeaderTemplate>
<table>
</HeaderTemplate>
<ItemTemplate>
<tr >
<td>
<asp:HiddenField ID="hide" Value='<%#Eval("UserId")%>' runat="server"/>
<asp:TextBox ID="txtReplyArea" runat="server" TextMode="Multiline" Columns="70" Rows="8" Visible="false"></asp:TextBox>
</td>
</tr>
<tr>
<td style="margin-left:47%;">
<asp:Button ID="btnReply" runat="server" Text="Reply" OnClick="btnReplyClicked" AutoPostBack="True" CommandArgument='<%#Eval("UserId")%>'/>
</td>
</tr>
</ItemTemplate>
<FooterTemplate>
</table>
</FooterTemplate>
</asp:Repeater>
</div>
</asp:Content>
答案 0 :(得分:1)
这对我有用。请注意,我从转发器中删除了EnableViewState并添加了OnItemDatabound事件。
<asp:Repeater ID="repeaterBlog" runat="server" OnItemDataBound="repeaterBlog_ItemDataBound">
<HeaderTemplate>
<table>
</HeaderTemplate>
<ItemTemplate>
<tr>
<td>
<asp:HiddenField ID="hide" Value='<%#Eval("UserId")%>' runat="server" />
<asp:TextBox ID="txtReplyArea" runat="server" TextMode="Multiline" Columns="70" Rows="8"
Visible="false"></asp:TextBox>
</td>
</tr>
<tr>
<td style="margin-left: 47%;">
<asp:Button ID="btnReply" runat="server" Text="Reply" OnClick="btnReplyClicked" AutoPostBack="True"
CommandArgument='<%#Eval("UserId")%>' />
</td>
</tr>
</ItemTemplate>
<FooterTemplate>
</table>
</FooterTemplate>
</asp:Repeater>
protected void Page_Load(object sender, EventArgs e)
{
DataTable dt = new DataTable();
dt.Columns.Add("UserId");
DataRow dr = dt.NewRow();
dr[0] = 34;
dt.Rows.Add(dr);
repeaterBlog.DataSource = dt;
repeaterBlog.DataBind();
}
public void repeaterBlog_ItemDataBound(object sender, RepeaterItemEventArgs e)
{
if (e.Item.ItemType == ListItemType.Item || e.Item.ItemType == ListItemType.AlternatingItem)
{
TextBox txt = (TextBox)e.Item.FindControl("txtReplyArea");
HiddenField hf = (HiddenField)e.Item.FindControl("hide");
txt.ID = "txtReplyArea" + hf.Value;
}
}
protected void btnReplyClicked(object sender, EventArgs e)
{
int areaId = int.Parse((sender as Button).CommandArgument);
string id = "txtReplyArea" + areaId;
foreach (RepeaterItem item in repeaterBlog.Items)
{
TextBox tb = item.FindControl(id) as TextBox;
}
}
答案 1 :(得分:-1)
您可以尝试这样
<asp:TextBox ID='<%# "txtReplyArea" + Convert.ToString(Eval("UserId")%>)' runat="server" TextMode="Multiline" Columns="70" Rows="8" Visible="false"></asp:TextBox>