“add”不包含“Image1”的定义，并且找不到可接受类型为“add”的第一个参数的扩展方法“Image1”(是否缺少 using 指令或程序集引用?)

[rexam]

在add.aspx中有 一个<img id="Image1" alt="" src="" />
add.aspx.cs代码如下：

using System;
using System.Collections;
using System.Configuration;
using System.Data;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;
using System.Data.SqlClient;


public partial class add : System.Web.UI.Page
{
    string imageUrl;
    protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack)
        {
            for (int i = 1; i <= 10; i++)
            {
                this.ddlPic.Items.Add("pic" + i.ToString() + ".gif");
            }

            this.Image1.ImageUrl = "images/face/" + ddlPic.SelectedValue;
        }
    }
    protected void Button1_Click(object sender, EventArgs e)
    {
        string sex;
        string userName = this.txtUserName.Text;
        string content = this.txtContent.Text;
        string imageUrl = ddlPic.SelectedValue;
        if (this.rbtnNv.Checked == true)
        {
            sex = "女";
        }
        else { sex = "男"; }
        SqlConnection conn = DB.createCon();
        SqlCommand cmd = new SqlCommand();
        cmd.Connection = conn;
        cmd.CommandText = "insert into liuyan(userName,sex,content,imageUrl,faceUrl) values('" + userName + "','" + sex + "','" + content + "','" + imageUrl + "','" + imageUrl + "')";
        if (cmd.ExecuteNonQuery() > 0)
        {
            Response.Write("<script>alert('留言成功');location.href='default.aspx';</script>");
        }
        else
        {
            Response.Write("<script>alert('留言失败');window.location=window.location;</script>");
        }
    }
    protected void Button2_Click(object sender, EventArgs e)
    {
        this.txtUserName.Text = "";
        this.txtContent.Text = "";
    }
    protected void ddlPic_SelectedIndexChanged(object sender, EventArgs e)
    {
        this.Image1.ImageUrl = "images/face/" + ddlPic.SelectedValue;
    }
}

————————————————————————————————————
运行错误提示是：

“/liuyanban”应用程序中的服务器错误。
--------------------------------------------------------------------------------

编译错误
说明: 在编译向该请求提供服务所需资源的过程中出现错误。请检查下列特定错误详细信息并适当地修改源代码。

编译器错误消息: CS1061: “add”不包含“Image1”的定义，并且找不到可接受类型为“add”的第一个参数的扩展方法“Image1”(是否缺少 using 指令或程序集引用?)

源错误:



行 26: }
行 27:
行 28: this.Image1.ImageUrl = "images/face/" + ddlPic.SelectedValue;
行 29: }
行 30: }


源文件: e:\liuyanban\add.aspx.cs 行: 28

-------------------------------------------------------------------------------
版本信息: Microsoft .NET Framework 版本:2.0.50727.1433; ASP.NET 版本:2.0.50727.1433
————————————————————————————————————

[rexam]

回答就给分，各位大侠帮帮忙~怎么错了？

[koukoujiayi]

1.将你的客户端控件加runat ="server",如下
<img id="Image1" alt="" src="" runat ="server" />
后台设置:
this.Image1.Src = "images/face/" + ddlPic.SelectedValue;

2.也可以用服务端控件,如:
<asp:Image ID="Image2" runat="server" />
后台设置:
Image2.ImageUrl = "images/face/" + ddlPic.SelectedValue;

[mngzilin]

2楼的ok

[wuyq11]

<img id="Image1" runat="server"
alt="" src="" />
服务器端控件asp:Image