web.config：

复制代码 代码如下:

<configuration>

<appSettings>

<add key="dmPic" value="bgImages/moren.jpg" />

</appSettings>

</configuration>

相应.cs页面：

复制代码 代码如下:

if (sdr.Read())

{

this.lblDianMianMingCheng.Text = sdr["BuJuGongSiName"].ToString();

DianMianId = sdr["BuJuID"].ToString();

if (sdr["BuJuCarPhoto"].ToString() == "")

{

this.ImageDianMian.ImageUrl = ConfigurationManager.AppSettings["dmPic"].ToString();//重点之处

}

else {

this.ImageDianMian.ImageUrl = sdr["BuJuCarPhoto"].ToString();

}

}