Question

"System.Web.UI.WebControls.TextBox"不包含"DataSource"的定义

,并且找不到可接受类型为"System.Web.UI.WebControls.TextBox"

using System;
using System.Collections;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;

public partial class chat : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
Application.Lock();
string[] messages = Application["chats"].ToString().Split(',');//把Application里的聊天记录拿出来,用，号分隔成数组 
for (int i = 0; i <= messages.Length - 1; i++)
{
contentTextBox.Text += messages[i] + "\n";
}
int current = Convert.ToInt32(Application["current"]);
ArrayList ItemList = new ArrayList();
string zs_name;       //已在线的用户名         
string[] user;        //在线用户的数组

int num = Convert.ToInt32(Application["userNum"]);
zs_name = Application["user"].ToString();
user = zs_name.Split(',');
for (int i = (num - 1); i >= 0; i--)
{
if (user[i].ToString() != "")
ItemList.Add(user[i].ToString());
}
ListBox1.DataSource = ItemList;
ListBox1.DataBind();
Application.UnLock();

}

Answer 1

你的ListBox1是什么类型的，切换到设计视图，点中这个控件看属性，里面有类型
很可能你拖动控件的时候拖错了