购物网第一阶段总结笔记4：友情链接模块之 友情链接的查询和修改
1：友情链接的查询
aspx代码：
<asp:TextBox ID="txtkey" runat="server"></asp:TextBox>
<asp:Button ID="btnSearch" runat="server" Text="查询" onclick="btnSearch_Click" />
cs代码：
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
namespace Web.admin
{
public partial class link_list : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
anp.RecordCount = new MyShop.DAL.LinkDAO().CalcCount(GetCond());
BindRep();
}
}
//sql中的where语句
private string GetCond()
{
string cond = "";
if (txtkey.Text.Trim().Length!=0)
{
string key = txtkey.Text.Trim();
cond = "linkname like '%" + key + "%' or url like '%" + key + "%'";
}
return cond;
}
//数据控件绑定函数
private void BindRep()
{
replist.DataSource = new MyShop.DAL.LinkDAO().GetList("*", "createDate", "desc", anp.PageSize, anp.CurrentPageIndex, GetCond());
replist.DataBind();
}
//删除友情链接
protected void Del(object sender, EventArgs e)
{
//利用linkButton的CommandArgument获取前台传入的参数
string id = (sender as LinkButton).CommandArgument;
new MyShop.DAL.LinkDAO().Delete(int.Parse(id));//删除
//重新绑定数据
BindRep();
}
//分页事件
protected void anp_PageChanged(object sender, EventArgs e)
{
BindRep();
}
//查询
protected void btnSearch_Click(object sender, EventArgs e)
{
anp.RecordCount = new MyShop.DAL.LinkDAO().CalcCount(GetCond());//把cond参数传给CalcCount
BindRep();
}
}
}
2：友情链接的修改
当点击修改按钮时候，链接到link_add.aspx ，然后传递给这个页面一个id，通过这个id，取得和此id相关的数据显示到页面的TextBox中。
<a href='link_add.aspx?id=<%#Eval("id") %>'>修改</a>
然后再link_add.asp中处理修改事件：
当点击修改按钮，进入link_add.asp中的时候，如果id存在的话，就把数据加载到文本框中：
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
string id=Request.QueryString["id"];
int x;
if (!string.IsNullOrEmpty(id)&&int.TryParse(id,out x))
{
MyShop.Model.Link model = new MyShop.DAL.LinkDAO().GetModel(x);
if (model!=null)
{
txtlinkname.Text = model.linkname;
txturl.Text = model.url;
btnadd.Text = "修改";
litH1.Text = "修改友情链接";
}
}
}
}
修改按钮的点击事件：
if (btnadd.Text == "修改")
{
string id=Request.QueryString["id"];
int x;
if (!string.IsNullOrEmpty(id)&&int.TryParse(id,out x))
{
MyShop.Model.Link model = new MyShop.DAL.LinkDAO().GetModel(x);
if (model!=null)
{
model.linkname = txtlinkname.Text.Trim();
model.url = txturl.Text.Trim();
model.createDate = DateTime.Now;
new MyShop.DAL.LinkDAO().Update(model);
txtlinkname.Text = "";
txturl.Text = "";
litmsg.Text = "<span style='color:blue'>修改成功！</span>";
return;
}
}
}
最终的link_add.asp的cs代码：
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
namespace Web.admin
{
public partial class link_add : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
string id=Request.QueryString["id"];
int x;
if (!string.IsNullOrEmpty(id)&&int.TryParse(id,out x))
{
MyShop.Model.Link model = new MyShop.DAL.LinkDAO().GetModel(x);
if (model!=null)
{
txtlinkname.Text = model.linkname;
txturl.Text = model.url;
btnadd.Text = "修改";
litH1.Text = "修改友情链接";
}
}
}
}
protected void btnadd_Click(object sender, EventArgs e)
{
string name = txtlinkname.Text.Trim();
string url = txturl.Text.Trim();
//修改友情链接
if (btnadd.Text == "修改")
{
string id = Request.QueryString["id"];
int x;
if (!string.IsNullOrEmpty(id) && int.TryParse(id, out x))
{
MyShop.Model.Link model = new MyShop.DAL.LinkDAO().GetModel(x);
if (model != null)
{
model.linkname = txtlinkname.Text.Trim();
model.url = txturl.Text.Trim();
model.createDate = DateTime.Now;
new MyShop.DAL.LinkDAO().Update(model);
txtlinkname.Text = "";
txturl.Text = "";
litmsg.Text = "<span style='color:blue'>修改成功！</span>";
return;
}
}
}
//增加友情链接
else
{
MyShop.DAL.LinkDAO dao = new MyShop.DAL.LinkDAO();
//验证输入框是否为空
if (name.Length == 0 && url.Length == 0)
{
litmsg.Text = "<span style='color:red'>请把信息填写完整！</span>";
return;//注意，要返回，没有这一句的话，下面的代码依然会执行！！
}
if (dao.Exists(name))
{
litmsg.Text = "<span style='color:red'>此超链接已经存在！</span>";
return;
}
int res = dao.Add(new MyShop.Model.Link()
{
linkname = name,
url = url,
createDate = DateTime.Now
});
if (res > 0)
{
litmsg.Text = "<span style='color:blue'>增加成功！</span>";
txtlinkname.Text = "";
txturl.Text = "";
}
else
{
litmsg.Text = "<span style='color:red'>增加失败，请联系管理员！</span>";
}
}
}
}
}
至此，友情链接模块做好。