用于从转发器访问控件内部的动态ID [英] For accessing dynamic id inside in a control from repeater
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问题描述
先生/女士，
我想在我的aspx页面中的代码后面访问动态控件ID，但我没有获得如何获取动态ID的信息.
Sir/Madam,
I want to access dynamic controls id in code behind in my aspx page but i didn''t get it how to get my dynamic id.
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default2.aspx.cs" Inherits="Default2" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title></title>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:repeater ID="myRepeater" runat="server"
onitemdatabound="myRepeater_ItemDataBound"
onitemcommand="myRepeater_ItemCommand">
<ItemTemplate>
<asp:TextBox ID="myTextBox" runat="server"></asp:TextBox>
<asp:Button ID="Button1" UseSubmitBehavior="false" runat="server" Text="Button" CommandName="myfunction" />
</ItemTemplate>
</asp:repeater>
</div>
</form>
</body>
</html>
还有我的代码背后的代码
and my code behind code
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Data;
using System.Data.SqlClient;
using System.Collections;
using System.IO;
using System.Web.UI.WebControls;
public partial class Default2 : System.Web.UI.Page
{
public static string Connection = "Data Source=.\\SQLEXPRESS;AttachDbFilename=|DataDirectory|Database.mdf;Integrated Security=True;User Instance=True";
public string code;
public string id
{
get
{ return id; }
set
{ id=value; }
}
protected void Page_Load(object sender, EventArgs e)
{
System.Data.SqlClient.SqlConnection con = new SqlConnection(Connection);
con.Open();
System.Data.SqlClient.SqlCommand cmd = new SqlCommand("select * from COMPLAINS", con);
System.Data.SqlClient.SqlDataAdapter dp = new SqlDataAdapter(cmd);
System.Data.DataTable dtu = new DataTable();
dp.Fill(dtu);
myRepeater.DataSource = dtu;
myRepeater.DataBind();
}
protected void myRepeater_ItemDataBound(object sender, RepeaterItemEventArgs e)
{
var textbox = e.Item.FindControl("myTextBox");
textbox.ClientIDMode = ClientIDMode.Static;
textbox.ID = "myTextBox" + (e.Item.ItemIndex + 1);
//
}
protected void myRepeater_ItemCommand(object source, RepeaterCommandEventArgs e)
{
if (e.CommandName == "myfunction")
{
string textbox = e.Item.ItemIndex.ToString();
textbox = "myTextBox" + textbox;
var nme = e.Item.FindControl(textbox);
}
}
}
我已经创建了我的文本框ID，例如myTextBox1，myTextBox2，myTextBox3等itemdatabound.但是现在我想访问我在itemcommand上的文本框ID，但是我无法在后面的代码中访问我的ID.当此方法显示为空值时，
i have create my textbox id''s like myTextBox1,myTextBox2,myTextBox3 and so on itemdatabound . but now i want to access my textbox id''s on itemcommand but i can''t access my id in code behind.it says null value when this method
if (e.CommandName == "myfunction")
{
string textbox = e.Item.ItemIndex.ToString();
textbox = "myTextBox" + textbox;
var nme = e.Item.FindControl(textbox);
}
请帮助我
please help me
推荐答案
分配ID时，分配ItemIndex + 1，但是在命令事件中访问控件时，则使用ItemIndex.因此，您的第一个框是myTextBox1，但是您的代码将查找myTextBox0.
When you assign the IDs you assign ItemIndex+1, but when you access the control in your command event you use ItemIndex. So your first box is myTextBox1 but your code looks for myTextBox0.
protected void myRepeater_ItemCommand(object source, RepeaterCommandEventArgs e)
{
if (e.CommandName == "myfunction")
{
// add the "+ 1" here too
string textbox = (e.Item.ItemIndex + 1).ToString();
这篇关于用于从转发器访问控件内部的动态ID的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
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