ImageButton是属于哪个命名空间的?

[Saunterer]

protected System.Web.UI.WebControls.ImageButton b1;
这样是错的

[sapiential]

命名空间System.Web.UI.WebControls没有错！

[Saunterer]

报错:
The type or namespace name 'ImageBotton' does not exist in the class or namespace 'System.Web.UI.WebControls' (are you missing an assembly reference?)

[jc15271149]

private System.Web.UI.WebControls.ImageButton ib = new ImageButton();

[疯狂秀才2018]

ＵＰ，没有错啊

[Saunterer]

就是这个报错index.aspx.cs
using System;
using System.Collections;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Drawing.Imaging;
using System.Data.OleDb;
namespace IndexPage{
public class page1 : System.Web.UI.Page {
protected System.Web.UI.WebControls.Label l1;
protected System.Web.UI.WebControls.TextBox username;
protected System.Web.UI.WebControls.Label l2;
protected System.Web.UI.WebControls.TextBox password;
protected System.Web.UI.WebControls.Label l3;
protected System.Web.UI.WebControls.TextBox vercode;
protected System.Web.UI.WebControls.ImageBotton b1;//这里开始就报错
protected System.Web.UI.WebControls.ImageBotton b2;
protected System.Web.UI.WebControls.TextBox keyword;
protected System.Web.UI.WebControls.ImageButton b3;

private void Page_Load(object sender, System.EventArgs e)
{
if(!Page.IsPostBack){
username.Text="输入你的用户名";
}
}
#region Web 窗体设计器生成的代码
override protected void OnInit(EventArgs e){
InitializeComponent();
base.OnInit(e); }
private void InitializeComponent(){
this.Button1.Click += new
System.EventHandler(this.Button1_Click);
this.Load += new System.EventHandler(this.Page_Load);}
#endregion

}
}

[异想天开的妄想狂]

ImageButton 类
显示图像并对图像上的鼠标单击作出响应的控件。

命名空间:System.Web.UI.WebControls
程序集:System.Web（在 system.web.dll

从2005 MSDN copy的