ASP.NET的GridView浅学习

GridView的实现分为三个层面，一个是前端层面，一个是表的层面，最后一个是逻辑处理层。

一、前端实现（一个新增按钮、一个GridView、一个ObjectDataScoure数据源）

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="WebForm1.aspx.cs" Inherits="WebApplication4.WebForm1" %><!DOCTYPE html><html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/><title></title>
</head>
<body><form id="form1" runat="server"><div><asp:GridView ID="GridView1" runat="server" AllowPaging="True" AllowSorting="True" AutoGenerateColumns="False" DataKeyNames="ID" DataSourceID="ObjectDataSource1" style="margin-top: 17px; margin-bottom: 44px"><Columns><asp:TemplateField ShowHeader="False"><EditItemTemplate><asp:LinkButton ID="LinkButton3" runat="server" CausesValidation="True" CommandName="Update" Text="更新"></asp:LinkButton><asp:LinkButton ID="LinkButton4" runat="server" CausesValidation="False" CommandName="Cancel" Text="取消"></asp:LinkButton></EditItemTemplate><ItemTemplate><asp:LinkButton ID="LinkButton2" runat="server" CausesValidation="False" CommandName="Edit" Text="编辑" ></asp:LinkButton></ItemTemplate></asp:TemplateField><asp:TemplateField ShowHeader="False"><ItemTemplate><asp:LinkButton ID="LinkButton1" runat="server" CausesValidation="False" CommandName="Delete" Text="删除" OnClientClick="return confirm('确认删除吗？');"></asp:LinkButton></ItemTemplate></asp:TemplateField><asp:TemplateField><FooterTemplate><asp:LinkButton ID="lnkbtnOk" runat="server" CommandName="Insert" οnclick="lnkbtnOk_Click" >保存</asp:LinkButton><asp:LinkButton ID="lnkbtnCancel" runat="server" οnclick="lnkbtnCancel_Click" >取消</asp:LinkButton></FooterTemplate></asp:TemplateField><asp:BoundField DataField="ID" HeaderText="ID" InsertVisible="False" ReadOnly="True" SortExpression="ID" /><asp:TemplateField HeaderText="teachername" SortExpression="teachername"><EditItemTemplate><asp:TextBox ID="TextBox1" runat="server" Text='<%# Bind("teachername") %>'></asp:TextBox></EditItemTemplate><ItemTemplate><asp:Label ID="Label1" runat="server" Text='<%# Bind("teachername") %>'></asp:Label></ItemTemplate><FooterTemplate><asp:TextBox ID="txtName" runat="server" Width="70px"></asp:TextBox></FooterTemplate></asp:TemplateField><asp:TemplateField HeaderText="gender" SortExpression="gender"><EditItemTemplate><asp:TextBox ID="TextBox2" runat="server" Text='<%# Bind("gender") %>'></asp:TextBox></EditItemTemplate><ItemTemplate><asp:Label ID="Label2" runat="server" Text='<%# Bind("gender") %>'></asp:Label></ItemTemplate><FooterTemplate><asp:TextBox ID="txtgender" runat="server" Width="70px"></asp:TextBox></FooterTemplate></asp:TemplateField><asp:TemplateField HeaderText="country" SortExpression="country"><EditItemTemplate><asp:TextBox ID="TextBox3" runat="server" Text='<%# Bind("country") %>'></asp:TextBox></EditItemTemplate><ItemTemplate><asp:Label ID="Label3" runat="server" Text='<%# Bind("country") %>'></asp:Label></ItemTemplate><FooterTemplate><asp:TextBox ID="txtcountry" runat="server" Width="70px"></asp:TextBox></FooterTemplate></asp:TemplateField><asp:TemplateField HeaderText="native" SortExpression="native"><EditItemTemplate><asp:TextBox ID="TextBox4" runat="server" Text='<%# Bind("native") %>'></asp:TextBox></EditItemTemplate><ItemTemplate><asp:Label ID="Label4" runat="server" Text='<%# Bind("native") %>'></asp:Label></ItemTemplate><FooterTemplate><asp:TextBox ID="txtnative" runat="server" Width="70px"></asp:TextBox></FooterTemplate></asp:TemplateField><%-- <asp:CommandField ShowDeleteButton="True" ShowEditButton="True" />--%><%--   <asp:BoundField DataField="teachername" HeaderText="teachername" SortExpression="teachername" /><asp:BoundField DataField="gender" HeaderText="gender" SortExpression="gender" /><asp:BoundField DataField="country" HeaderText="country" SortExpression="country" /><asp:BoundField DataField="native" HeaderText="native" SortExpression="native" />--%><asp:BoundField DataField="teachermumber" HeaderText="teachermumber" SortExpression="teachermumber" /></Columns></asp:GridView><asp:Button ID="Button1" runat="server" OnClick="lnkbtnInsert_Click" Text="新增" /><br /><br /><asp:ObjectDataSource ID="ObjectDataSource1" runat="server" DeleteMethod="DeletetTeacher" InsertMethod="AddTeacher" SelectMethod="Getteachers" TypeName="WebApplication4.bll.teacherbll" UpdateMethod="UpdateTeacher" OnSelecting="ObjectDataSource1_Selecting"><DeleteParameters><asp:Parameter Name="ID" Type="Int32" /></DeleteParameters><InsertParameters><asp:Parameter Name="teachername" Type="String" /><asp:Parameter Name="gender" Type="String" /><asp:Parameter Name="country" Type="String" /><asp:Parameter Name="native" Type="String" /><asp:Parameter Name="teachermumber" Type="String" /></InsertParameters><UpdateParameters><asp:Parameter Name="ID" Type="Int32" /><asp:Parameter Name="teachername" Type="String" /><asp:Parameter Name="gender" Type="String" /><asp:Parameter Name="country" Type="String" /><asp:Parameter Name="native" Type="String" /><asp:Parameter Name="teachermumber" Type="String" /></UpdateParameters></asp:ObjectDataSource></div><br /><br /><br /></form>
</body>
</html>

实现效果

二数据逻辑处理层

一、新建一个文件夹命名为bll

二、添加一个类，作为数据逻辑处理层命名为teacherbll

代码实现：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using WebApplication4.DataSet1TableAdapters;
namespace WebApplication4.bll
{public class teacherbll{private teacherTableAdapter teacher=null;/// <summary>/// 私有化对象/// </summary>public teacherTableAdapter adapter{get{if (teacher == null)teacher = new teacherTableAdapter();return teacher;}}/// <summary>/// 设计访问器/// </summary>/// <returns></returns>[System.ComponentModel.DataObjectMethod(System.ComponentModel.DataObjectMethodType.Select, true)]public DataSet1.teacherDataTable Getteachers(){return adapter.GetData();}[System.ComponentModel.DataObjectMethod(System.ComponentModel.DataObjectMethodType.Insert, true)]public bool AddTeacher(string teachername, string gender, string country, string native, string teachermumber){DataSet1.teacherDataTable teachers = new DataSet1.teacherDataTable();//实例化一个数据集DataSet1.teacherRow teacher = teachers.NewteacherRow();//新增数据集的行对象if (teachername == null)//判断值是否为空{teacher.SetteachernameNull();}else teacher.teachername = teachername;if (gender == null)teacher.SetgenderNull();else teacher.gender = gender;if (country == null)teacher.SetcountryNull();else teacher.country = country;if (native == null)teacher.SetnativeNull();else teacher.native = native;if (teachermumber == null)teacher.SetteachermumberNull();else teacher.teachermumber = teachermumber;teachers.AddteacherRow(teacher);//把数据集的新增行添加到表中int rows = adapter.Update(teachers);//更新数据库中的表return rows==1;}[System.ComponentModel.DataObjectMethod(System.ComponentModel.DataObjectMethodType.Select,true)]public  DataSet1.teacherDataTable GetTeacherByID(int ID){return adapter.GetDataBy(ID);}/// <summary>/// 更新的操作/// </summary>/// <param name="ID"></param>/// <param name="teachername"></param>/// <param name="gender"></param>/// <param name="country"></param>/// <param name="native"></param>/// <param name="teachermumber"></param>/// <returns></returns>[System.ComponentModel.DataObjectMethod(System.ComponentModel.DataObjectMethodType.Update, true)]public bool UpdateTeacher(int ID, string teachername, string gender, string country, string native, string teachermumber){DataSet1.teacherDataTable teachers = adapter.GetDataBy(ID);DataSet1.teacherRow teacher = teachers[0];if (teachername == null) teacher.SetteachernameNull();else teacher.teachername = teachername;if (gender == null) teacher.SetgenderNull();else teacher.gender = gender;if (country == null) teacher.SetcountryNull();else teacher.country = country;if (native == null) teacher.SetnativeNull();else teacher.native = native;if (teachermumber == null) teacher.SetteachermumberNull();else teacher.teachermumber = teachermumber;int rows = adapter.Update(teacher);return rows == 1;   }/// <summary>/// 删除的操作/// </summary>/// <param name="ID"></param>/// <returns></returns>[System.ComponentModel.DataObjectMethod(System.ComponentModel.DataObjectMethodType.Delete, true)]public bool DeletetTeacher(int ID){int rows = adapter.Delete(ID);return rows == 1;}}
}

三、表层

一、添加数据-->新建项-->数据集DataSet1.xsd

二、从与数据库进行的连接中选择自己所要处理的表，拖到DataSet1.xsd的页面来

三、在表的页面新建select查询（这里为了方便以ID为查询条件)

四、提醒

别忘了把数据源与控件绑定起来！

实现效果

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