點擊更換當前圖片

 <asp:TemplateField><ItemStyle HorizontalAlign="Left" Width="129px" />
  <ItemTemplate>
        <asp:LinkButton ID="linkbutton1" runat="server" Text= "ABC"  OnCommand="foldernameclick" CommandArgument='<%# DataBinder.Eval(Container.DataItem,("folderid")) %>' ></asp:LinkButton>                                   
     </ItemTemplate>
</asp:TemplateField>  

<asp:TemplateField>
              <ItemTemplate>   
                  <asp:Image runat="server" ID="Image1" ImageUrl='image/14.gif' />
               </ItemTemplate>
</asp:TemplateField>

 

#region  //點擊文件夾名並更換當前圖片
    public void foldernameclick(object sender, CommandEventArgs e)
    {
        if (e.CommandArgument.ToString() != null)
        {                                  
            this.DataGrid1.DataSource = dt_filelist(e.CommandArgument.ToString());
            this.DataGrid1.DataBind();
           
            for (int i = 0; i <= this.GridView2.Rows.Count - 1; i++)
            {
                if (this.GridView2.Rows[i].Cells[0].Text != e.CommandArgument.ToString())
                {
                    ((Image)this.GridView2.Rows[i].FindControl("Image1")).ImageUrl = "image/14.gif";
                 
                }
            }
            ((Image)((LinkButton)sender).Parent.FindControl("Image1")).ImageUrl = "image/13.gif";          
        }       
    }
#endregion

protected void Page_Load(object sender, EventArgs e)
{

      for (int i = 1; i <= this.GridView2.Rows.Count - 1; i++)
       {//默認顯示圖片
             Image img = (Image)this.GridView2.Rows[0].FindControl("Image1");
             img.ImageUrl = "image/13.gif";
             Image img1 = (Image)this.GridView2.Rows[i].FindControl("Image1");
             img1.ImageUrl = "image/14.gif";
         }   

}