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  • 大话GridView—(1) 编辑、删除、查看详情、分页

            GridView控件的使用绝对是任何.net开发人员都必须具备的基础知识。如何使用，怎样用好GridView的各个功能，还是有很多人对其不甚了解，今天我将对GridView控件简单的编辑、删除进行阐述，希望对大家有所帮助。

            创建表：

    USE [test] 

GO

CREATE TABLE [dbo].[B]

( [ID] [int] NOT NULL,

[Subject] [varchar](50) COLLATE Chinese_PRC_CI_AS NULL,

[Score] [varchar](50) COLLATE Chinese_PRC_CI_AS NULL )ON [PRIMARY]

GO

    前台代码如下：

    <%@ Page Language="C#" AutoEventWireup="true"  CodeFile="Default.aspx.cs" Inherits="_Default" %>

<!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>无标题页</title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
    
    </div>
    <asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False" 
        DataKeyNames="ID" onrowcancelingedit="GridView1_RowCancelingEdit" 
        onrowdeleting="GridView1_RowDeleting" onrowediting="GridView1_RowEditing" 
        onrowupdating="GridView1_RowUpdating" AllowPaging="true" PageSize="5" 
        onpageindexchanging="GridView1_PageIndexChanging">
        <Columns>
            <asp:BoundField DataField="ID" HeaderText="编号" ReadOnly="True"/>
            <asp:TemplateField HeaderText="科目">
                <EditItemTemplate>
                    <asp:TextBox ID="TextBox1" runat="server" Text='<%# Bind("Subject") %>'></asp:TextBox>
                </EditItemTemplate>
                <ItemTemplate>
                    <asp:Label ID="Label1" runat="server" Text='<%# Bind("Subject") %>'></asp:Label>
                </ItemTemplate>
            </asp:TemplateField>
            <asp:TemplateField HeaderText="分数">
                <EditItemTemplate>
                    <asp:TextBox ID="TextBox2" runat="server" Text='<%# Bind("Score") %>'></asp:TextBox>
                </EditItemTemplate>
                <ItemTemplate>
                    <asp:Label ID="Label2" runat="server" Text='<%# Bind("Score") %>'></asp:Label>
                </ItemTemplate>
            </asp:TemplateField>
            <asp:CommandField HeaderText="编辑" ShowEditButton="True" />
            <asp:CommandField HeaderText="删除" ShowDeleteButton="True" />
            <asp:HyperLinkField DataNavigateUrlFields="ID" 
                DataNavigateUrlFormatString="view.aspx?id={0}" HeaderText="查看" Text="查看" />
        </Columns>
    </asp:GridView>
    </form>
</body>
</html>

    要使可以编辑，使想要编辑的字段转化为可编辑列。

    后台代码：

    代码
    using System;
    using System.Configuration;
    using System.Data;
    using System.Linq;
    using System.Web;
    using System.Web.Security;
    using System.Web.UI;
    using System.Web.UI.HtmlControls;
    using System.Web.UI.WebControls;
    using System.Web.UI.WebControls.WebParts;
    using System.Xml.Linq;
    using System.Data.SqlClient;
    publicpartialclass _Default : System.Web.UI.Page
    {
    private SqlConnection conn;
    private SqlCommand cmd;
    private SqlDataAdapter adapter;
    protectedvoid Page_Load(object sender, EventArgs e)
    {
    #region//绑定数据到GridView1
    //!IsPostBack很重要，如果不加这句的话，将不能更新，因为该语句表示加载时再执行。具体用法，下次再详解
    if (!IsPostBack)
    {
    bind();
    }


    #endregion

    }
    protected SqlConnection getDB()
    {
    #region//连接数据库
    string connString ="server=MyComputer\\sqlexpress;database=test;uid=sa;pwd=123456";
    returnnew SqlConnection(connString);
    #endregion

    }
    protectedvoid bind()
    {
    #region//获取数据
    string selet_all ="select * from B";
    conn     = getDB();
    conn.Open();
    cmd     =new SqlCommand();
    cmd.CommandText     = selet_all;
    cmd.Connection     = conn;
    adapter     =new SqlDataAdapter(cmd);

    DataSet ds     =new DataSet();
    adapter.Fill(ds);
    GridView1.DataSource     = ds;
    GridView1.DataBind();
    conn.Close();
    #endregion

    }
    protectedvoid GridView1_RowEditing(object sender, GridViewEditEventArgs e)
    {
    #region//初始化编辑
    GridView1.EditIndex     = e.NewEditIndex;
    bind();
    #endregion
    }
    protectedvoid GridView1_RowDeleting(object sender, GridViewDeleteEventArgs e)
    {
    #region//删除
    int id = Convert.ToInt32(GridView1.DataKeys[e.RowIndex].Value);
    string delete_one ="delete from B where ID='"+id+"'";
    conn     = getDB();
    conn.Open();
    cmd     =new SqlCommand();
    cmd.Connection     = conn;
    cmd.CommandText     = delete_one;
    cmd.ExecuteNonQuery();
    conn.Close();
    bind();
    #endregion
    }
    protectedvoid GridView1_RowCancelingEdit(object sender, GridViewCancelEditEventArgs e)
    {
    #region//取消编辑
    GridView1.EditIndex     =-1;
    bind();
    #endregion
    }
    protectedvoid GridView1_RowUpdating(object sender, GridViewUpdateEventArgs e)
    {
    #region//更新
    int id = Convert.ToInt32(GridView1.DataKeys[e.RowIndex].Value);
    TextBox sub     = GridView1.Rows[e.RowIndex].Cells[1].FindControl("TextBox1") as TextBox;
    TextBox sco     = GridView1.Rows[e.RowIndex].Cells[2].FindControl("TextBox2") as TextBox;
    string subject = sub.Text.Trim().ToString();
    string score = sco.Text.Trim().ToString();
    string update_one ="update B set Subject='"+subject+"',Score='"+score+"' where ID='"+id+"'";
    conn     = getDB();
    conn.Open();
    cmd     =new SqlCommand();
    cmd.CommandText     = update_one;
    cmd.Connection     = conn;
    cmd.ExecuteNonQuery();
    conn.Close();
    GridView1.EditIndex     =-1;
    bind();
    #endregion
    }
    protectedvoid GridView1_PageIndexChanging(object sender, GridViewPageEventArgs e)
    {
    GridView1.PageIndex     = e.NewPageIndex;//绑定新业
     bind();
    }
    }

    点击查看详情，转到view.aspx是通过以下代码获取ID的值：

    代码
    using System;
    using System.Collections;
    using System.Configuration;
    using System.Data;
    using System.Linq;
    using System.Web;
    using System.Web.Security;
    using System.Web.UI;
    using System.Web.UI.HtmlControls;
    using System.Web.UI.WebControls;
    using System.Web.UI.WebControls.WebParts;
    using System.Xml.Linq;

    publicpartialclass view : System.Web.UI.Page
    {
    protectedvoid Page_Load(object sender, EventArgs e)
    {
    if (!IsPostBack)
    {
    int id=Convert.ToInt32(Request.QueryString["ID"].ToString());
    Lable1.Text     = id.ToString();
    }
    }
    }

     GridView功能也许没有DataList强大，但是它在 很多地方还是有很大用处的，相信每个开发人员都已经了解到了，GridView还自带分页、设置样式等。这里的代码分页如果记录过多的话，将使服务器经受很大的考验，接下来我将为大家继续码优质的分页代码和其它GridView高级进阶。谢谢！！
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  • 原文地址：https://www.cnblogs.com/xiaoyi115/p/1883451.html
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