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datagrid空间的使用

2024-07-05 03:07:26   223人阅读

这两天项目中用到了datagrid控件，之前没怎么用过。经过一番努力，最终效果总算是实现了。我有如此感受：
1、功能强大，用法复杂。
2、细节很多，应该小心。
3、多问多查多试。

前台代码如下：

 1 <%@ Page Language="C#" AutoEventWireup="true" CodeFile="pinpai_lan_Add.aspx.cs" Inherits="wlgl_spring_pinpai_lan_Add" %>
 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     <meta charset="utf-8">
 8 <!--#include file="../inc/header.aspx"-->
 9 </head>
10 <body>
11     <form id="form1" runat="server">
12     <div>
13     <asp:dataGrid id="dgContents" AutoGenerateColumns="False" 
14             HeaderStyle-CssClass="info thead" CssClass="table table-bordered table-hover" 
15             gridlines="None" runat="server" oncancelcommand="dgContents_CancelCommand" 
16             ondeletecommand="dgContents_DeleteCommand" 
17             oneditcommand="dgContents_EditCommand" 
18             onupdatecommand="dgContents_UpdateCommand">
19     <Columns>
20     <asp:BoundColumn DataField="id" Visible="false" ReadOnly="true"></asp:BoundColumn>
21       <asp:BoundColumn DataField="name" HeaderText="品牌栏目名称" ItemStyle-VerticalAlign="Middle">
22 <ItemStyle VerticalAlign="Middle"></ItemStyle>
23         </asp:BoundColumn>
24 <asp:EditCommandColumn HeaderText="操作" ButtonType="LinkButton" EditText="编辑" UpdateText="更新" CancelText="取消"></asp:EditCommandColumn>
25 
26         <asp:ButtonColumn CommandName="Delete" 
27             Text="&lt;div onclick=&quot;return confirm(‘确定删除该栏目吗？‘)&quot;&gt;删除&lt;/div&gt;">
28         </asp:ButtonColumn>
29         
30     </Columns>
31     
32 <HeaderStyle CssClass="info thead"></HeaderStyle>
33   </asp:dataGrid><br />
34   <div id="div" runat="server" visible="true" >
35       <span>添加品牌栏目:</span><asp:TextBox runat="server" id="txtLanMu"/><asp:Label Text="" ID="mess" runat="server" ForeColor="Red" />
36   </div>
37         <asp:Button Text="添加栏目" ID="btn_Add" runat="server" CssClass="btn" 
38             onclick="btn_Add_Click" />
39         <input class="btn" type="button" onClick="location.href=http://www.mamicode.com/‘background_pinpai.aspx‘;return false;" value="返 回" />
40     </div>
41     </form>
42 </body>
43 </html>
View Code

后台代码：

using System;
using System.Collections.Generic;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Data;

public partial class wlgl_spring_pinpai_lan_Add : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        
        if (!IsPostBack)
        {
            dgContents.DataSource = SqlHelper.GetPinpai_lan();
        dgContents.DataBind();
        }
    }
    protected void btn_Add_Click(object sender, EventArgs e)
    {
        string str=txtLanMu.Text.Trim();
        if (str=="")
        {
            mess.Text = "必须输入栏目名称！";
            return;
        }
        DataTable dt = SqlHelper.GetPinpai_lan();
        if (dt.Rows.Count>0)
        {
            for (int i = 0; i < dt.Rows.Count; i++)
            {
                if (dt.Rows[i]["name"].ToString().Trim()==str)
                {
                    mess.Text = "栏目已存在！";
                    return;
                }
            }
        }

        if (SqlHelper.Insert(str))
        {
            mess.Text = "添加栏目成功！";
        }
        else
        {
            mess.Text = "添加栏目失败！";
        }
        dgContents.DataSource = SqlHelper.GetPinpai_lan();
        dgContents.DataBind();
    }
    protected void dgContents_EditCommand(object source, DataGridCommandEventArgs e)
    {
        dgContents.EditItemIndex = e.Item.ItemIndex;
        dgContents.DataSource = SqlHelper.GetPinpai_lan();
        dgContents.DataBind();
    }
    protected void dgContents_CancelCommand(object source, DataGridCommandEventArgs e)
    {
        dgContents.EditItemIndex = -1;
        dgContents.DataSource = SqlHelper.GetPinpai_lan();
        dgContents.DataBind();
    }
    protected void dgContents_DeleteCommand(object source, DataGridCommandEventArgs e)
    {
        string sid = e.Item.Cells[0].Text;
        int id;
        if (int.TryParse(sid, out id))
        {
            if (SqlHelper.DeleteAll(id))
            {
                mess.Text = "删除成功！";
            }
            else
            {
                mess.Text = "删除失败！";
            }
        }
        else
        {
            mess.Text = "删除失败！";
        }
        dgContents.DataSource = SqlHelper.GetPinpai_lan();
        dgContents.DataBind();
    }
    protected void dgContents_UpdateCommand(object source, DataGridCommandEventArgs e)
    {
        string sid =e.Item.Cells[0].Text;
        int id;
        string name = ((TextBox)e.Item.Cells[1].Controls[0]).Text;
        if (int.TryParse(sid,out id))
        {
            if (SqlHelper.Update(id,name))
            {
                mess.Text = "更新成功！";
            }
            else
            {
                mess.Text = "更新失败！";
            }
        }
        else
        {
            mess.Text = "更新失败！";
        }
        dgContents.EditItemIndex = -1;
        dgContents.DataSource = SqlHelper.GetPinpai_lan();
        dgContents.DataBind();
    }
}

 

我想要的功能是，在datagrid中可以编辑删除数据。


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