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  • 记录的添加,修改,删除等操作,??

    前台:
     1<%@ Page Language="C#" AutoEventWireup="true" CodeFile="DataGrid.aspx.cs" Inherits="Ado_DataGrid" %>
     2
     3<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
     4
     5<html xmlns="http://www.w3.org/1999/xhtml" >
     6<head runat="server">
     7    <title>无标题页</title>
     8</head>
     9<body>
    10    <form id="form1" runat="server">
    11    <div>
    12        <div style="z-index: 101; left: 199px;  728px; position: absolute; top: 53px;
    13            height: 344px">
    14            <table border="1" cellpadding="1">
    15                <tr>
    16                    <td style=" 79px; background-color: #3399ff; height: 28px;">
    17                        编号:</td>
    18                    <td style=" 174px; background-color: #3399ff; height: 28px;">
    19                        <asp:TextBox ID="txtID" runat="server"></asp:TextBox></td>
    20                    <td style=" 222px; background-color: #3399ff; height: 28px;">
    21                        <asp:CustomValidator ID="CustomValidator1" runat="server" ControlToValidate="txtID"
    22                            Display="Dynamic" ErrorMessage="该用户已经存在" OnServerValidate="CustomValidator1_ServerValidate"></asp:CustomValidator></td>
    23                </tr>
    24                <tr>
    25                    <td style=" 79px; height: 23px; background-color: #3399ff">
    26                        姓名:</td>
    27                    <td style=" 174px; height: 23px; background-color: #3399ff">
    28                        <asp:TextBox ID="txtName" runat="server"></asp:TextBox></td>
    29                    <td style=" 222px; height: 23px; background-color: #3399ff">
    30                        <asp:RequiredFieldValidator ID="RequiredFieldValidator1" runat="server" ControlToValidate="txtName"
    31                            ErrorMessage="*"></asp:RequiredFieldValidator></td>
    32                </tr>
    33                <tr>
    34                    <td style=" 79px; height: 24px; background-color: #3399ff">
    35                        性别:</td>
    36                    <td style=" 174px; height: 24px; background-color: #3399ff">
    37                        <asp:RadioButton ID="sexNan" runat="server" GroupName="sex" Text="男" Checked="True" />
    38                        <asp:RadioButton ID="sexNv" runat="server" GroupName="sex" Text="女" />
    39                    </td>
    40                    <td style=" 222px; height: 24px; background-color: #3399ff">
    41                    </td>
    42                </tr>
    43                <tr>
    44                    <td style="height: 22px; background-color: #3399ff; text-align: center;" colspan="3">
    45                        <asp:Button ID="btnAdd" runat="server" Text="添加" OnClick="btnAdd_Click" />
    46                        <asp:Button ID="btnupdate" runat="server" OnClick="btnupdate_Click" Text="修改" />
    47                        <asp:Button ID="btnDel" runat="server" Text="删除" />
    48                        <asp:Button ID="btnsel" runat="server" Text="查询" /></td>
    49                </tr>
    50            </table>
    51            <br />
    52            <asp:GridView ID="GridView1" runat="server" BackColor="White" BorderColor="#CC9966"
    53                BorderStyle="None" BorderWidth="1px" CellPadding="4" Width="498px">
    54                <FooterStyle BackColor="#FFFFCC" ForeColor="#330099" />
    55                <RowStyle BackColor="White" ForeColor="#330099" />
    56                <SelectedRowStyle BackColor="#FFCC66" Font-Bold="True" ForeColor="#663399" />
    57                <PagerStyle BackColor="#FFFFCC" ForeColor="#330099" HorizontalAlign="Center" />
    58                <HeaderStyle BackColor="#990000" Font-Bold="True" ForeColor="#FFFFCC" />
    59            </asp:GridView>
    60        </div>
    61    
    62    </div>
    63    </form>
    64</body>
    65</html>
    66


    后台:
     1using System;
     2using System.Data;
     3using System.Configuration;
     4using System.Collections;
     5using System.Web;
     6using System.Web.Security;
     7using System.Web.UI;
     8using System.Web.UI.WebControls;
     9using System.Web.UI.WebControls.WebParts;
    10using System.Web.UI.HtmlControls;
    11
    12public partial class Ado_DataGrid : System.Web.UI.Page
    13{
    14    protected void Page_Load(object sender, EventArgs e)
    15    {
    16        this.fillDg();
    17    }
    18    protected void CustomValidator1_ServerValidate(object source, ServerValidateEventArgs args)
    19    {
    20        string pID = args.Value;
    21        if (personOprate.findPerson(pID))
    22        {
    23            args.IsValid = false;   //该用户已经存在,验证不能通过
    24        }
    25        else
    26        {
    27            args.IsValid = true;   //该用户可以添加
    28        }
    29    }
    30
    31    private void fillDg()
    32    {
    33        this.GridView1.DataSource = personOprate.selectAllperson();
    34        this.GridView1.DataBind();
    35    }
    36
    37    protected void btnAdd_Click(object sender, EventArgs e)
    38    {
    39        if(this.IsValid)
    40        {
    41            person p = new person();
    42            p.pID = this.txtID.Text;
    43            p.pName = this.txtName.Text;
    44            if(this.sexNan.Checked)
    45            {
    46                p.pSex = "男";
    47            }
    48            else
    49            {
    50                p.pSex = "女";
    51            }
    52            if (personOprate.insertOprate(p))
    53            {
    54                Response.Write("插入成功!");
    55                this.fillDg();
    56            }
    57            else
    58            {
    59                Response.Write("<font color=red>插入失败!</font>");
    60            }
    61        }
    62    }
    63    protected void btnupdate_Click(object sender, EventArgs e)
    64    {
    65        //如果用户存在,则可以修改
    66        if (!this.CustomValidator1.IsValid)
    67        {
    68            person p = new person();
    69            p.pID = this.txtID.Text;
    70            p.pName = this.txtName.Text;
    71            if(this.sexNan.Checked)
    72            {
    73                p.pSex = "男";
    74            }
    75            else
    76            {
    77                p.pSex = "女";
    78            }
    79
    80            if (personOprate.updateUser(p))
    81            {
    82                Response.Write("修改成功!");
    83            }
    84            else
    85            {
    86                Response.Write("修改出错!");
    87            }
    88                this.fillDg();
    89        }
    90        else
    91        {
    92            Response.Write("<font color=red>用户不存在,修改失败!</font>");
    93        }
    94    }
    95}
    96


    实体类 person.cs
     1using System;
     2using System.Data;
     3using System.Configuration;
     4using System.Web;
     5using System.Web.Security;
     6using System.Web.UI;
     7using System.Web.UI.WebControls;
     8using System.Web.UI.WebControls.WebParts;
     9using System.Web.UI.HtmlControls;
    10
    11/// <summary>
    12/// person 的摘要说明
    13/// 这是一个实体类,传参.
    14/// </summary>
    15public class person
    16{
    17    public string pID;
    18    public string pName;
    19    public string pSex;
    20
    21    public person()
    22    {
    23        //
    24        // TODO: 在此处添加构造函数逻辑
    25        //
    26    }
    27}
    28

    操作类 personOperate.cs
      1using System;
      2using System.Data;
      3using System.Configuration;
      4using System.Web;
      5using System.Web.Security;
      6using System.Web.UI;
      7using System.Web.UI.WebControls;
      8using System.Web.UI.WebControls.WebParts;
      9using System.Web.UI.HtmlControls;
     10using System.Data;
     11using System.Data.SqlClient;
     12/// <summary>
     13/// personOprate 的摘要说明
     14/// 操作类
     15/// </summary>
     16public class personOprate
     17{
     18    public personOprate()
     19    {
     20        //
     21        // TODO: 在此处添加构造函数逻辑
     22        //
     23    }
     24    public static SqlConnection createCon()
     25    {
     26        return new SqlConnection("server=localhost;database=book;uid=sa;pwd=admin");
     27    }
     28
     29
     30    public static bool findPerson(string pID)
     31    {
     32        SqlConnection con = personOprate.createCon();
     33        con.Open();
     34        SqlCommand cmd = new SqlCommand("select pid from person where pid='" + pID +"'",con);
     35        int count = Convert.ToInt32(cmd.ExecuteScalar());
     36        if (count > 0)
     37        {
     38            return true;   //该用户已经存在
     39        }
     40        else
     41        {
     42            return false;   //该用户不存在,可以添加
     43        }
     44    }
     45
     46    public static DataTable selectAllperson()
     47    {
     48        SqlConnection con = personOprate.createCon();
     49        SqlDataAdapter sda = new SqlDataAdapter();
     50        sda.SelectCommand = new SqlCommand("select * from person",con);
     51        DataSet ds = new DataSet();
     52        sda.Fill(ds,"person"); //填充数据集.填充完后,数据已经从数据库到达本地了.接下来只要返回就可以了.
     53        return ds.Tables["person"];
     54        
     55    }
     56
     57    public static bool insertOprate(person p)
     58    { 
     59        //使用参数
     60        try //只要 try 里面任何一句出错,则返回 false;
     61        {
     62            SqlConnection con = personOprate.createCon();
     63            con.Open();
     64            SqlCommand cmd = new SqlCommand("insert into person values(@pID,@pName,@pSex)", con);
     65
     66            SqlParameter para = new SqlParameter("@pID", SqlDbType.VarChar, 10);
     67            para.Value = p.pID;
     68            cmd.Parameters.Add(para);
     69
     70            SqlParameter para2 = new SqlParameter("pName", SqlDbType.VarChar, 20);
     71            para2.Value = p.pName;
     72            cmd.Parameters.Add(para2);
     73
     74            SqlParameter para3 = new SqlParameter("pSex", SqlDbType.VarChar, 2);
     75            para3.Value = p.pSex;
     76            cmd.Parameters.Add(para3);
     77
     78            cmd.ExecuteNonQuery();
     79            return true;
     80        }
     81        catch(Exception e)  //注意 Exception e 
     82        {
     83            return false;
     84        }
     85    }
     86
     87
     88    //修改用户信息
     89    public static bool updateUser(person p)
     90    { 
     91       try
     92       {
     93           //SqlConnection con = personOprate.createCon();
     94           //con.Open();
     95           //SqlCommand cmd = new SqlCommand("update person set personName='" + p.pName + "',personSex='" + p.pSex + "' where personID='" + p.pID + "'", con);
     96           //cmd.ExecuteNonQuery();
     97           //return true;
     98
     99           SqlConnection con = personOprate.createCon();
    100           con.Open();
    101           SqlCommand cmd = new SqlCommand("update person set personName='wgf',personSex='女' where personID='"+p.pID+"'",con);
    102           cmd.ExecuteNonQuery();
    103           return true;
    104
    105           //SqlConnection con = personOprate.createCon();
    106           //con.Open();
    107           //SqlCommand cmd = new SqlCommand("update person set (personName,personSex) values(@pName,@pSex)",con);
    108
    109           //SqlParameter para2 = new SqlParameter("pName", SqlDbType.VarChar, 20);
    110           //para2.Value = p.pName;
    111           //cmd.Parameters.Add(para2);
    112
    113           //SqlParameter para3 = new SqlParameter("pSex", SqlDbType.VarChar, 2);
    114           //para3.Value = p.pSex;
    115           //cmd.Parameters.Add(para3);
    116
    117           //cmd.ExecuteNonQuery();
    118           //return true;
    119       }
    120       catch(Exception e)   //Exception e 是什么意思呢?不明白
    121       {
    122           return false;
    123       }
    124    }
    125
    126}
    127


    表person 字段: pID,personName,personSex

    这里哪里有错呢,不明白啊!!!
    1           SqlConnection con = personOprate.createCon();
    2           con.Open();
    3           SqlCommand cmd = new SqlCommand("update person set personName='" + p.pName + "',personSex='" + p.pSex + "' where personID='" + p.pID + "'", con);
    4           cmd.ExecuteNonQuery();
    5           return true;
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  • 原文地址：https://www.cnblogs.com/gfwei/p/536823.html
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