protected void RPTNewsClass_ItemCommand(object source, RepeaterCommandEventArgs e)
    {
        var result =new OperationResult<NewsClass>();//我自己的逻辑组件 不用管
        if (e.CommandName == "Edit")//判断哪个按钮处罚的
        {
            result= this.Edit(e);
        }
        if (result.IsSuccess)
        {
            Utility.Alert(this.Page, "操作成功！");
        }
        else
        {
            Utility.Alert(this.Page, "操作失败！");
        }
    }
 private OperationResult<NewsClass> Edit(RepeaterCommandEventArgs e)
    {
        var service = ObjectFactory.GetInstance<NewsClassService>();
        var tbName = e.Item.FindControl("TBName") as TextBox;//通过这句找控件
        var ddlRootClass = e.Item.FindControl("DDLClass") as DropDownList;
        var entity = new NewsClass()
        {
            Class_name = tbName.Text,
            Class_belongto = Convert.ToInt32(ddlRootClass.SelectedValue),
            Class_id = Convert.ToInt32(e.CommandArgument)
        };
        return service.Update(entity);
    }

------解决方案--------------------
主要是FindControl("txtSortID")这个方法

几个主要的数据绑定控件都差不多这样

------解决方案--------------------
(Item.FindControl("ControlId") as controlType)...

去网上搜搜多的很

------解决方案--------------------
protected void Repeater1_ItemCommand(object source, RepeaterCommandEventArgs e)
   {
       if (e.CommandName == "UP")
       {
           //上移
       }
       else if (e.CommandName == "DOWN")
       {
           //下移
       }
       else if (e.CommandName == "DEL")
       {  
           //删除
       }
   }