【利用存储过程和三层架构完成新闻发布】
1，本实例是新闻发布系统，采用三层架构，执行操作全部使用存储过程，实现添加新闻，删除新闻，查看新闻，修改新闻。并且最后用存储过程实现分页公共。本实例在vs2010中能够完整运行，以下是具体实现：
2 数据设计和存储过程的实现
数据库内容：
数据库设计和已创建的存储过程：
具体存储过程：
1添加新闻信息存储过程：
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1 USE [Blogs] 2 GO 3 /****** Object: StoredProcedure [dbo].[AddNews] Script Date: 02/26/2013 13:42:45 ******/ 4 SET ANSI_NULLS ON 5 GO 6 SET QUOTED_IDENTIFIER ON 7 GO 8 9 -- ============================================= 10 -- Author: 白宁超 11 -- Create date: 2013-2-24 10:08:20 12 -- Description: 添加新闻 13 -- ============================================= 14 ALTER PROCEDURE [dbo].[AddNews] 15 @n_name varchar(50), 16 @n_class varchar(50), 17 @n_auter varchar(50), 18 @n_time datetime, 19 @n_content nvarchar(max), 20 @id int output 21 AS 22 BEGIN 23 insert into News values(@n_name,@n_class,@n_auter,@n_time,@n_content) 24 select @id=MAX(n_id) from News 25 END
2删除新闻信息存储过程
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USE [Blogs] GO /****** Object: StoredProcedure [dbo].[DeleteNews] Script Date: 02/26/2013 13:44:52 ******/ SET ANSI_NULLS ON GO SET QUOTED_IDENTIFIER ON GO -- ============================================= -- Author: 白宁超 -- Create date: 2013-2-24 10:47:22 -- Description: 删除新闻 -- ============================================= ALTER PROCEDURE [dbo].[DeleteNews] @id int AS BEGIN delete News where n_id=@id select * from News END
3修改加新闻信息存储过程
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USE [Blogs] GO /****** Object: StoredProcedure [dbo].[UpdateNews] Script Date: 02/26/2013 13:45:18 ******/ SET ANSI_NULLS ON GO SET QUOTED_IDENTIFIER ON GO -- ============================================= -- Author: 白宁超 -- Create date: 2013-2-24 10:30:34 -- Description: 修改新闻信息 -- ============================================= ALTER PROCEDURE [dbo].[UpdateNews] @n_name varchar(50), @n_class varchar(50), @n_auter varchar(50), @n_time datetime, @n_content nvarchar(max), @id int AS BEGIN update News set n_name=@n_name,n_class=@n_class, n_auter=@n_auter,n_time=@n_time,n_content=@n_content where n_id=@id select * from News where n_id=@id END
4查看新闻信息存储过程
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USE [Blogs] GO /****** Object: StoredProcedure [dbo].[SelectNews] Script Date: 02/26/2013 13:46:02 ******/ SET ANSI_NULLS ON GO SET QUOTED_IDENTIFIER ON GO -- ============================================= -- Author: 白宁超 -- Create date: 2013-2-24 10:40:33 -- Description: 查看新闻信息 -- ============================================= ALTER PROCEDURE [dbo].[SelectNews] AS BEGIN select * from News END
5新闻信息分页存储过程
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USE [Blogs] GO /****** Object: StoredProcedure [dbo].[GetDataByIndex] Script Date: 02/26/2013 13:46:49 ******/ SET ANSI_NULLS ON GO SET QUOTED_IDENTIFIER ON GO -- ============================================= -- Author: 白宁超 -- Create date: 2013-2-24 17:05:23 -- Description: 实现分页功能 -- ============================================= ALTER PROCEDURE [dbo].[GetDataByIndex] @pageindex int, @pagecount int output AS BEGIN declare @sql nvarchar(1000) declare @Pagec int set @sql='select top 5 * from News where n_id not in (select top '+CAST(@pageindex*5 as nvarchar(10))+' n_id from News)' select @pagecount=COUNT(*) from News select @pagec = COUNT(*) from News set @pagecount = (@pagec+9)/5 exec (@sql) END
2，vs2010中对存储过程的调用
运行整体效果：
前台代码：
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<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="WebForm1.aspx.cs" Inherits="prodemo.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"> <br /> <asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False" Height="230px" Width="706px"> <Columns> <asp:BoundField DataField="n_id" HeaderText="编号" /> <asp:BoundField DataField="n_name" HeaderText="新闻题目" /> <asp:BoundField DataField="n_class" HeaderText="新闻类别" /> <asp:BoundField DataField="n_auter" HeaderText="新闻作者" /> <asp:BoundField DataField="n_time" HeaderText="发布时间" /> <asp:BoundField DataField="n_content" HeaderText="新闻内容" /> </Columns> </asp:GridView> <table> <tr> <td> <asp:LinkButton ID="LinkButton1" runat="server" onclick="LinkButton1_Click" >首页</asp:LinkButton></td> <td> <asp:TextBox ID="TextBox7" runat="server" Width="29px"></asp:TextBox></td> <td> <asp:LinkButton ID="LinkButton5" runat="server" onclick="LinkButton5_Click" >GO</asp:LinkButton></td> <td> <asp:Label ID="Label1" runat="server" Text="第"></asp:Label></td> <td> <asp:Label ID="index" runat="server" Text="1"></asp:Label></td> <td> <asp:Label ID="Label3" runat="server" Text="页"></asp:Label></td> <td> <asp:Label ID="Label2" runat="server" Text="共"></asp:Label></td> <td> <asp:Label ID="labcount" runat="server" Text=""></asp:Label></td> <td> <asp:Label ID="Label5" runat="server" Text="页"></asp:Label></td> <td> <asp:LinkButton ID="LinkButton2" runat="server" onclick="LinkButton2_Click" >上一页</asp:LinkButton></td> <td> <asp:LinkButton ID="LinkButton3" runat="server" onclick="LinkButton3_Click" >下一页</asp:LinkButton></td> <td> <asp:LinkButton ID="LinkButton4" runat="server" onclick="LinkButton4_Click" >尾页</asp:LinkButton></td> </tr> </table> <br /> <hr style=" font-weight:bolder; background-color:Red"> <br /> <asp:TextBox ID="TextBox2" runat="server" Height="27px" Width="231px"></asp:TextBox> <asp:DropDownList ID="DropDownList1" runat="server" Height="17px" Width="151px"> <asp:ListItem>娱乐新闻</asp:ListItem> <asp:ListItem>时政新闻</asp:ListItem> <asp:ListItem>军事新闻</asp:ListItem> </asp:DropDownList> <asp:TextBox ID="TextBox3" runat="server" Height="21px" Width="207px" ></asp:TextBox> <br /> <br /> <asp:TextBox ID="TextBox4" runat="server" Height="65px" TextMode="MultiLine" Width="646px"></asp:TextBox> <asp:Button ID="Button2" runat="server" Text="添加" onclick="Button2_Click" /> <br /> <asp:TextBox ID="TextBox5" runat="server" Height="21px" Width="66px"></asp:TextBox> <asp:Button ID="Button3" runat="server" Text="修改" onclick="Button3_Click" /> <p> <asp:TextBox ID="TextBox6" runat="server" Height="21px" Width="66px"></asp:TextBox> <asp:Button ID="Button4" runat="server" Text="删除" onclick="Button4_Click" /> </p> </form> </body> </html>
后台代码：
1三层架构实现，创建ui层prodemo，model层，和DAl层。然后dal对model引用，ui对dal引用。完成效果图如下：
删除信息DAl数据层代码：
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using System; using System.Collections.Generic; using System.Linq; using System.Web; using System.Data.SqlClient; using System.Data; namespace DAL { public class DeleteNews { public bool DALDeleteNews(Model.SelectNews model) { SqlConnection con = new SqlConnection("server=.;database=Blogs;integrated security=true"); SqlCommand cmd = new SqlCommand("DeleteNews", con); con.Open(); cmd.CommandType = CommandType.StoredProcedure; cmd.Parameters.Add("@id", SqlDbType.Int).Value = model.id; int i = cmd.ExecuteNonQuery(); if (i > 0) { return true; } else { return false; } } } }
ui层对dal层删除信息操作：
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/// <summary> /// 删除信息 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> protected void Button4_Click(object sender, EventArgs e) { DAL.DeleteNews ddn = new DAL.DeleteNews(); Model.SelectNews msn = new Model.SelectNews(); msn.id = Convert.ToInt32(TextBox6.Text); bool ds = ddn.DALDeleteNews(msn); if (ds == true) { BDSelectNews(); } else { BDSelectNews(); } }
以下查看/修改/添加信息与删除信息类似，仅显示ui层操作代码如下：
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/// <summary> /// 查看信息 /// </summary> public void BDSelectNews() { DAL.Select das = new DAL.Select(); DataSet ds = das.DALSelectNews(); GridView1.DataSource = ds; GridView1.DataBind(); } /// <summary> /// 添加信息 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> protected void Button2_Click(object sender, EventArgs e) { DAL.AddNews dan = new DAL.AddNews(); Model.SelectNews msn = new Model.SelectNews(); msn.name = TextBox2.Text; msn.myclass = DropDownList1.SelectedValue; msn.auter = TextBox3.Text; msn.time = DateTime.Now; msn.content = TextBox4.Text; bool ds = dan.DALAddNews(msn); if (ds == true) { BDSelectNews(); } else { BDSelectNews(); } } /// <summary> /// 更新信息 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> protected void Button3_Click(object sender, EventArgs e) { DAL.updateNews dun = new DAL.updateNews(); Model.SelectNews msn = new Model.SelectNews(); msn.id = Convert.ToInt32(TextBox5.Text); msn.name = TextBox2.Text; msn.myclass = DropDownList1.SelectedValue; msn.auter = TextBox3.Text; msn.time = DateTime.Now; msn.content = TextBox4.Text; bool ds = dun.DALUpdateNews(msn); if (ds == true) { BDSelectNews(); } else { BDSelectNews(); } } /// <summary> /// 删除信息 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> protected void Button4_Click(object sender, EventArgs e) { DAL.DeleteNews ddn = new DAL.DeleteNews(); Model.SelectNews msn = new Model.SelectNews(); msn.id = Convert.ToInt32(TextBox6.Text); bool ds = ddn.DALDeleteNews(msn); if (ds == true) { BDSelectNews(); } else { BDSelectNews(); } }
以下是对分页的执行：
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/// <summary> /// 通用分页方法 /// </summary> /// <param name="ide">页数参数</param> /// <returns></returns> public DataSet bd(int ide) { using (SqlConnection con = new SqlConnection("server=.;database=Blogs;integrated security=true")) { SqlDataAdapter da = new SqlDataAdapter("GetDataByIndex", con);//加载分页的存储过程 da.SelectCommand.CommandType = CommandType.StoredProcedure;//执行类型 da.SelectCommand.Parameters.Add(new SqlParameter("@pageindex", SqlDbType.Int)).Value = ide;//输入参数，显示第几页 da.SelectCommand.Parameters.Add(new SqlParameter("@pagecount", SqlDbType.Int)).Direction = ParameterDirection.Output;//输出参数，显示总页数 DataSet ds = new DataSet(); da.Fill(ds); labcount.Text = (Convert.ToInt32(da.SelectCommand.Parameters["@pagecount"].Value)-1).ToString(); //返回总页数 if (ds.Tables[0].Rows.Count > 0) { return ds; } else{ return null; } } } /// <summary> /// 信息分页 /// </summary> /// <param name="sender"></param> /// <param name="0">第一页显示数据</param> public void shuju() //初始化数据 { DataSet ds=bd(0); GridView1.DataSource = ds; GridView1.DataBind(); #region 初始页 //using (SqlConnection con = new SqlConnection("server=.;database=Blogs;integrated security=true")) //{ // SqlDataAdapter da = new SqlDataAdapter("GetDataByIndex", con); // da.SelectCommand.CommandType = CommandType.StoredProcedure; // da.SelectCommand.Parameters.Add(new SqlParameter("@pageindex", SqlDbType.Int)).Value = 0; // da.SelectCommand.Parameters.Add(new SqlParameter("@pagecount", SqlDbType.Int)).Direction = ParameterDirection.Output; // DataSet ds = new DataSet(); // da.Fill(ds); // labcount.Text = da.SelectCommand.Parameters["@pagecount"].Value.ToString(); //返回总页数 // this.GridView1.DataSource = ds; // this.GridView1.DataBind(); //} #endregion if (index.Text == "1") { LinkButton1.Enabled = false; LinkButton2.Enabled = false; } else if(index.Text==labcount.Text) { LinkButton3.Enabled = false; LinkButton4.Enabled = false; } } /// <summary> /// 首页事件 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> protected void LinkButton1_Click(object sender, EventArgs e) { index.Text = "1"; DataSet ds = bd(0); GridView1.DataSource = ds; GridView1.DataBind(); if (index.Text == "1") { LinkButton1.Enabled = false; LinkButton2.Enabled = false; LinkButton3.Enabled = true; LinkButton4.Enabled = true; } #region //DataSet ds = bd(0); //GridView1.DataSource = ds; //GridView1.DataBind(); //using (SqlConnection con = new SqlConnection("server=.;database=Blogs;integrated security=true")) // { // SqlDataAdapter da= new SqlDataAdapter("GetDataByIndex", con); // da.SelectCommand.CommandType = CommandType.StoredProcedure; // da.SelectCommand.Parameters.Add(new SqlParameter("@pageindex", SqlDbType.Int)); // da.SelectCommand.Parameters["@pageindex"].Value = 0; // da.SelectCommand.Parameters.Add(new SqlParameter("@pagecount", SqlDbType.Int)); // da.SelectCommand.Parameters["@pagecount"].Direction = ParameterDirection.Output; // DataSet ds = new DataSet(); // da.Fill(ds); // this.GridView1.DataSource = ds; // this.GridView1.DataBind(); // } //index.Text = "1"; ////把首页和上一页设置为不可操作 //LinkButton1.Enabled = false; //LinkButton2.Enabled = false; //LinkButton3.Enabled = true; //LinkButton4.Enabled = true; //LinkButton5.Enabled = true; #endregion } /// <summary> /// GO事件 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> protected void LinkButton5_Click(object sender, EventArgs e) { using (SqlConnection con = new SqlConnection("server=.;database=Blogs;integrated security=true")) { int intpageindex = Convert.ToInt32(TextBox7.Text); int pagecount = Convert.ToInt32(labcount.Text); //判断，如果输入的数字大于总页数就返回 if (intpageindex > pagecount) return; else { DataSet ds = bd(intpageindex - 1); GridView1.DataSource = ds; GridView1.DataBind(); #region GO //SqlDataAdapter da = new SqlDataAdapter("GetDataByIndex", con); //da.SelectCommand.CommandType = CommandType.StoredProcedure; //da.SelectCommand.Parameters.Add(new SqlParameter("@pageindex", SqlDbType.Int)).Value = intpageindex - 1; //da.SelectCommand.Parameters.Add(new SqlParameter("@pagecount", SqlDbType.Int)).Direction = ParameterDirection.Output; //DataSet ds = new DataSet(); //da.Fill(ds); #endregion if (TextBox7.Text == "1") //判断如果输入1，首页和上一页不可操作，但是尾页和下一页可以操作 { LinkButton1.Enabled = false; LinkButton2.Enabled = false; LinkButton3.Enabled = true; LinkButton4.Enabled = true; } else if (TextBox7.Text == labcount.Text) //判断如果输入的数等于总页数，首页和第一页可以操作，但是尾页可下一页不可操作 { LinkButton3.Enabled = false; LinkButton4.Enabled = false; LinkButton1.Enabled = true; LinkButton2.Enabled = true; } else //如果是其他情况，首页第一页，尾页和下一页都可操作 { LinkButton1.Enabled = true; LinkButton2.Enabled = true; LinkButton3.Enabled = true; LinkButton4.Enabled = true; } } } index.Text = TextBox7.Text; //设置当前页数等于输入的页数 } /// <summary> /// 上一页事件 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> protected void LinkButton2_Click(object sender, EventArgs e) { int intpageindex = Convert.ToInt32(index.Text);//当前页数 DataSet ds = bd(intpageindex-2); GridView1.DataSource = ds; GridView1.DataBind(); #region 上一页 //using (SqlConnection con = new SqlConnection("server=.;database=Blogs;integrated security=true")) // { // string pageindex = index.Text; // int intpageindex = Convert.ToInt32(pageindex); // SqlDataAdapter da = new SqlDataAdapter("GetDataByIndex", con); // da.SelectCommand.CommandType = CommandType.StoredProcedure; // da.SelectCommand.Parameters.Add(new SqlParameter("@pageindex", SqlDbType.Int)).Value = intpageindex - 2; // da.SelectCommand.Parameters.Add(new SqlParameter("@pagecount", SqlDbType.Int)).Direction = ParameterDirection.Output; // DataSet ds = new DataSet(); // da.Fill(ds); // labcount.Text = da.SelectCommand.Parameters["@pagecount"].Value.ToString(); // this.GridView1.DataSource = ds; // this.GridView1.DataBind(); // } #endregion index.Text = (intpageindex - 1).ToString();//上页数 LinkButton3.Enabled = true; LinkButton4.Enabled = true; if (index.Text == "1") { LinkButton1.Enabled = false; LinkButton2.Enabled = false; } } /// <summary> /// 下一页事件 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> protected void LinkButton3_Click(object sender, EventArgs e) { int intpageindex = Convert.ToInt32(index.Text);//当前页数 DataSet ds = bd(intpageindex); GridView1.DataSource = ds; GridView1.DataBind(); #region 下一页 //using (SqlConnection con = new SqlConnection("server=.;database=Blogs;integrated security=true")) // { // string pageindex = index.Text; // int intpageindex = Convert.ToInt32(pageindex); // SqlDataAdapter da = new SqlDataAdapter("GetDataByIndex", con); // da.SelectCommand.CommandType = CommandType.StoredProcedure; // da.SelectCommand.Parameters.Add(new SqlParameter("@pageindex", SqlDbType.Int)); // da.SelectCommand.Parameters["@pageindex"].Value = intpageindex; // da.SelectCommand.Parameters.Add(new SqlParameter("@pagecount", SqlDbType.Int)); // da.SelectCommand.Parameters["@pagecount"].Direction = ParameterDirection.Output; // DataSet ds = new DataSet(); // da.Fill(ds); // labcount.Text = da.SelectCommand.Parameters["@pagecount"].Value.ToString(); // this.GridView1.DataSource = ds; // this.GridView1.DataBind(); // } #endregion index.Text = (intpageindex + 1).ToString();//下页数 LinkButton1.Enabled = true; LinkButton2.Enabled = true; if (index.Text == labcount.Text) { LinkButton3.Enabled = false; LinkButton4.Enabled = false; } } /// <summary> /// 尾页事件 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> protected void LinkButton4_Click(object sender, EventArgs e) { int intindex = Convert.ToInt32(labcount.Text)-1;//当前页数 DataSet ds = bd(intindex); GridView1.DataSource = ds; GridView1.DataBind(); #region 尾页 //using (SqlConnection con = new SqlConnection("server=.;database=Blogs;integrated security=true")) //{ // int intindex = Convert.ToInt32(labcount.Text); // SqlDataAdapter da = new SqlDataAdapter("GetDataByIndex", con); // da.SelectCommand.CommandType = CommandType.StoredProcedure; // da.SelectCommand.Parameters.Add(new SqlParameter("@pageindex", SqlDbType.Int)); // da.SelectCommand.Parameters["@pageindex"].Value = intindex - 1; // da.SelectCommand.Parameters.Add(new SqlParameter("@pagecount", SqlDbType.Int)); // da.SelectCommand.Parameters["@pagecount"].Direction = ParameterDirection.Output; // DataSet ds = new DataSet(); // da.Fill(ds); // this.GridView1.DataSource = ds; // this.GridView1.DataBind(); //} #endregion index.Text = labcount.Text;//尾页 LinkButton1.Enabled = true; LinkButton2.Enabled = true; LinkButton3.Enabled = false; LinkButton4.Enabled = false; }
以上完成对存储过程基本操作，对三层架构深入理解。部分代码经过重构优化的，要不，分页的代码更多。当然还有优化之处，现在迫不及待把这些与大家分享。