C# 小型数据库管理界面
C#第四天 写了一个数据库管理界面 包含到很多知识 也学到很多存一下 感觉搞得有点偏快 记录一下爬忘 初学者代码较low
放一下 ：） 背单词
数据库比较轻量，用的Access （学长连接好的 写好的类和方法） 是一个三级level1 level2 level3结构
level1条目较少12条吧永恒不变 存到内存了 level2有独立的序列id，从属于第几条lvele1，本身的content， 还有存取的level3的多内容 以；；做分割符（条3专门写了个C++处理字符)
功能包含后两级的增删改
from布局大概也是这样 三级三列显示 name第一列label+"level1id" 第二列 Level2Label+"level2id" 第三列Level3Lable+"level3id"
动态生成Label控件实现 操作（不知道优秀的C#程序员用什么方法）
页面的布局大概是这样
在作业项目和危险点分析下面有
作业总则定死的 作业项目 危险点分析是同态生成的Label控件
tableLayoutPanel1 Level2_panel Level3_panel
很low吧 - -
实现增添删
删除直接提示 删除然后
其中增加 修改 用到另一个含有输入框的LavelAllAdd窗体
删除就直接在DBManager上了
下面是DBManager代码
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Data.OleDb;
using System.Text.RegularExpressions;
namespace power_project.AppForm
{
public partial class DBManager : Form
{
public String TmpLabName ="1";
public String TmpLv2Name = "1";
public String TmpLv3Name = "1"; //当前选中项
//String Level2Color = "0"; //记录颜色变化
//String Level3Color = "0";
power_project.Public_Class.DataAccessClass MyDataAccess = new Public_Class.DataAccessClass(); // 创建数据库对象
public DBManager()
{
InitializeComponent();
}
private void DBManager_Load(object sender, EventArgs e)
{
}
// 模拟hover特效
private void Level1_Enter(object sender, EventArgs e)
{
Label label = (Label)sender;
label.ForeColor = Color.Red;
}
private void Level1_Leave(object sender, EventArgs e)
{
Label label = (Label)sender;
label.ForeColor = Color.MediumBlue;
}
// endhover
private void Level1_Click(object sender, EventArgs e)
{
level2_panel.Controls.Clear();
int Level2_Rows = 0;
Label label = (Label)sender;
TmpLabName = label.Name.Substring(5);
//MessageBox.Show(TmpLabName);
OleDbDataReader tmpDR = MyDataAccess.Read_Cmd("select * from tb_user_privilege where (level1_belong =" + TmpLabName+") order by id ASC");
while(tmpDR.Read())
{ Level2_Rows++;
Label lb = new Label();
lb.Name = "Level2Lable" + Level2_Rows;
lb.Text = TmpLabName+"-"+Level2_Rows+":"+tmpDR["level2_des"].ToString();
lb.Width = 400;
lb.Height = 35;
lb.Click += new EventHandler(this.Level2_Click);
lb.BackColor = Color.White;
Point TP = new Point(0, 40 * (Level2_Rows - 1));
lb.Location = TP;
level2_panel.Controls.Add(lb);
}
}
public void Level2_Click(object sender, EventArgs e)
{
TmpLv3Name = "1"; //初始化三 防止越界
level3_panel.Controls.Clear(); //清空布局
Label label = (Label)sender;
Control TmpLabForWhite = Controls.Find("Level2Lable" + TmpLv2Name, true)[0]; //清除先前设置的红色
TmpLabForWhite.BackColor = Color.White;
TmpLv2Name = label.Name.Substring(11);
TmpLabForWhite = Controls.Find("Level2Lable" + TmpLv2Name, true)[0]; //清除先前设置的红色
TmpLabForWhite.BackColor = Color.DodgerBlue ;
OleDbDataReader tmpDR = MyDataAccess.Read_Cmd("select * from tb_user_privilege where level1_belong =" + TmpLabName + "and level2_id = " + TmpLv2Name);
if(tmpDR.Read()) //给leve3创建label
{
string content = tmpDR["level3_des"].ToString();
string[] sArr = Regex.Split(content, ";;");
for(int i=0;i窗体传递参数 用的是构造函数 （网上查也可用 public成员，还有另一种方法）
修改level2级内容 是有三个String参数的构造 ，level3直接表示操作
修改level3级内容 是有四个String参数的构造，levle3operate表示操作
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Data.OleDb;
using System.Text.RegularExpressions;
namespace power_project.AppForm
{
public partial class LevelAllAdd : Form
{
power_project.Public_Class.DataAccessClass MyDataAccess = new Public_Class.DataAccessClass();
String level1="0";
String level2="0";
String level3="0";
String level3operate = "";
public LevelAllAdd()
{
InitializeComponent();
}
public LevelAllAdd(String level1,String level2,String level3)
{
this.level1 = level1;
this.level2 = level2;
this.level3 = level3;
InitializeComponent();
}
public LevelAllAdd(String level1, String level2, String level3,String level3operate)
{
this.level1 = level1;
this.level2 = level2;
this.level3 = level3;
this.level3operate = level3operate;
InitializeComponent();
}
public int SplitForSemiconlon(String str, int IndexSemiconlonOld)
{
int IndexSemiconlonNew = str.IndexOf(";;", IndexSemiconlonOld ); //寻找;;的下标位置
return IndexSemiconlonNew;
}
private void LevelAllAdd_Load(object sender, EventArgs e)
{ if (level3.Equals("level2update"))
{
OleDbDataReader tmpDRForShow = MyDataAccess.Read_Cmd("select *from tb_user_privilege where level1_belong= " + level1 + " and level2_id=" + level2);
tmpDRForShow.Read();
AddTextBox.Text = tmpDRForShow["level2_des"].ToString();
}
else if(level3operate.Equals("level3update"))
{
OleDbDataReader tmpDRForShow = MyDataAccess.Read_Cmd("select *from tb_user_privilege where level1_belong= " + level1 + " and level2_id=" + level2);
tmpDRForShow.Read();
string content = tmpDRForShow["level3_des"].ToString();
string[] sArr = Regex.Split(content, ";;");
AddTextBox.Text = sArr[Convert.ToInt32(level3)-1].ToString();
}
}
private void textBox1_TextChanged(object sender, EventArgs e)
{
}
private void button1_Click(object sender, EventArgs e)
{ if(level3.Equals("level2add")) //添加level2条
{
OleDbDataReader tmpDRForCount = MyDataAccess.Read_Cmd("select count(level2_id) as level2row from tb_user_privilege where level1_belong=" + level1); //统计条数 编号level2_id
tmpDRForCount.Read();
String Level2Rows = tmpDRForCount["level2row"].ToString();
int ConveyNum = Convert.ToInt32(Level2Rows)+1; //将string类型转换为int类型
Level2Rows = ConveyNum.ToString();
//MessageBox.Show(Level2Rows);
//MessageBox.Show(level1);
//MessageBox.Show(AddTextBox.Text);
OleDbDataReader tmpDR = MyDataAccess.Read_Cmd("insert into tb_user_privilege(level1_belong,level2_des,level2_id) values (" + level1 + ",'" + AddTextBox.Text + "',"+Level2Rows+")");
MessageBox.Show("添加成功:)");
this.Close();
}
else if(level3.Equals("level2update")) //更新level2条
{
//MessageBox.Show(level1);
//MessageBox.Show(level2);
//MessageBox.Show(AddTextBox.Text);
//MessageBox.Show("update tb_user_privilege set level2_des='" + AddTextBox.Text + "' where (level1_belong = " + level1 + " and level2_id = " + level2 + ")");
OleDbDataReader tmpDR = MyDataAccess.Read_Cmd("update tb_user_privilege set level2_des='"+AddTextBox.Text+"' where (level1_belong = "+level1+" and level2_id = "+level2+")");
MessageBox.Show("信息更新成功");
this.Close();
}
else //level3操作
{
//MessageBox.Show(level3operate); //先读取level3des
OleDbDataReader tmpDR = MyDataAccess.Read_Cmd("select *from tb_user_privilege where level1_belong= "+level1+" and level2_id="+level2);
tmpDR.Read();
if (level3operate.Equals("level3add")) //level3增加操作
{
String TmpLevel3DesForAdd = tmpDR["level3_des"].ToString()+AddTextBox.Text+";;";
//MessageBox.Show("修改后的信息" + TmpLevel3DesForAdd);
OleDbDataReader tmpDR2 = MyDataAccess.Read_Cmd("update tb_user_privilege set level3_des ='"+TmpLevel3DesForAdd+" ' where level1_belong= "+level1+" and level2_id= "+level2);
MessageBox.Show("信息添加成功");
this.Close();
}
else if (level3operate.Equals("level3update")) //level3更新操作
{
String TmpLevel3Update = tmpDR["level3_des"].ToString();
int TmpIndexst = 0; //相应子串起始位置
int TmpIndexen = 0; //相应字串终止位置
//MessageBox.Show(TmpLevel3Update);
//MessageBox.Show("leve3更新操作");
for(int i=0;i效果就是后两级内容增删的功能实现了 3涉及一些分串操作（哎只能传<2Mb的）
