用带参数的存储过程实现新闻的搜索功能

来源：互联网发布：淘宝网兔子编辑：程序博客网时间：2024/06/06 03:38

--这是数据库中的存储过程

CREATE PROC Pro_GetNewsByTitle2
@newkey varchar(64),
@count int out
AS
select NewsTitle,SUBSTRING(NewsContent,1,20)+'......' as NewsContent,CreateTime from T_News WHERE NewsTitle LIKE @newkey Or NewsContent like @newkey;
select @count=COUNT(*) from T_News WHERE NewsTitle LIKE @newkey Or NewsContent like @newkey;
GO

--这是新闻搜索功能的前台页面

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="WebForm1.aspx.cs" Inherits="新闻管理系统.WebForm1" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title></title>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>
<asp:Button ID="Button1"
runat="server" Text="搜索" onclick="Button1_Click" /><asp:Label ID="Label1" runat="server"
Text="Label"></asp:Label>
<div id="divResult" runat="server"></div>
</div>
</form>
</body>
</html>

--这是新闻搜索功能的后台代码

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Data.SqlClient;
using System.Data;
using System.Text;

namespace 新闻管理系统
{
public partial class WebForm1 : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
DateBind();
}
}

private void DateBind()
{
string connstr = "data source=LOVE-PC\\SQLEXPRESSPC;initial catalog=News;user id=sa;password=admin";
using (SqlConnection conn = new SqlConnection(connstr))
{
conn.Open();
using (SqlCommand cmd = conn.CreateCommand())
{
//cmd.CommandText = "SELECT NewsTitle,SUBSTRING(NewsContent,1,20)+'....' AS NewsContent,CreateTime From T_News WHERE NewsTitle LIKE @newskey OR NewsContent LIKE @newskey";
cmd.CommandText = "Pro_GetNewsByTitle2";
/*参数替换方法1*/
cmd.Parameters.AddWithValue("@newkey", "%" + TextBox1.Text + "%");
cmd.CommandType = CommandType.StoredProcedure;
SqlParameter pm1 = new SqlParameter("@count", SqlDbType.Int);
pm1.Direction = ParameterDirection.Output;
cmd.Parameters.Add(pm1);
////参数替换方法2
//SqlParameter pmd = new SqlParameter("@newskey", "%" + TextBox1.Text + "%");
//cmd.Parameters.Add(pmd);
////参数替换三
//SqlParameter pm1 = new SqlParameter("@newskey",SqlDbType.VarChar);
//pm1.Value = "%" + TextBox1.Text + "%";
//cmd.Parameters.Add(pm1);
SqlDataAdapter adapter = new SqlDataAdapter(cmd);
DataTable dt = new DataTable();
//html只认html控件，所有服务器端控件都将转换为html控件
int count = adapter.Fill(dt);
Label1.Text = "为您找到" + pm1.Value.ToString()+"条符合条件的记录";
//Response.Write(count);
//使用Fill方法填充数据的时候，不需要显示打开连接，因为在Fill方法内部有判断 if(conn.open==false){conn.open()}
cmd.Dispose();
conn.Dispose();

StringBuilder sb1 = new StringBuilder();
sb1.Append("<table border=2>");
sb1.Append("<tr><td>新闻标题</td><td>新闻内容</td><td>创建时间</td></tr>");
for (int i = 0; i < dt.Rows.Count; i++)
{
sb1.Append("<tr>");
sb1.Append("<td>"+dt.Rows[i]["NewsTitle"].ToString()+"</td>");
sb1.Append("<td>" + dt.Rows[i]["NewsContent"].ToString() + "</td>");
sb1.Append("<td>" + dt.Rows[i]["CreateTime"].ToString() + "</td>");
sb1.Append("</tr>");

}
sb1.Append("</table>");
divResult.InnerHtml = sb1.ToString();


}

}



}
protected void Button1_Click(object sender, EventArgs e)
{
DateBind();
}
}
}