using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.Runtime.InteropServices;
using System.IO;
using System.Collections;
namespace StructTest
{
public partial class frmMain : Form
{
public frmMain()
{
InitializeComponent();
}
/// <summary>
/// 结构体
/// </summary>
[StructLayoutAttribute(LayoutKind.Sequential, CharSet = CharSet.Unicode, Pack = 1)]
struct ObjItem
{
public int a1; //4 byte
public int a2; //4 byte
public int a3; //4 byte
[MarshalAs(UnmanagedType.ByValArray, SizeConst = 128)]
public byte[] a4; //Name 占128字节
public int a5; //4 byte
public int a6; //4 byte
public int a7; //4 byte
public int a8; //4 byte
public int a9; //4 byte
public int a10; //4 byte
public int a11; //4 byte
public int a12; //4 byte
public int a13; //4 byte
public int a14; //4 byte
public int a15; //4 byte
public int a16; //4 byte
public int a17; //4 byte
public int a18; //4 byte
public int a19; //4 byte
[MarshalAs(UnmanagedType.ByValArray, SizeConst = 512)]
public char[] a20; //512
[MarshalAs(UnmanagedType.ByValArray, SizeConst = 32)]
public char[] a21; //32
/// <summary>
/// 初始化结构体
/// </summary>
/// <param name="a4is128">a4的长度</param>
/// <param name="a20is512">a20的长度</param>
/// <param name="a21is32">a21的长度</param>
public ObjItem(int a4is128, int a20is512, int a21is32)
{
a1 = 0;
a2 = 0;
a3 = 0;
a4 = new byte[128];
a5 = 0;
a6 = 0;
a7 = 0;
a8 = 0;
a9 = 0;
a10 = 0;
a11 = 0;
a12 = 0;
a13 = 0;
a14 = 0;
a15 = 0;
a16 = 0;
a17 = 0;
a18 = 0;
a19 = 0;
a20 = new char[512];
a21 = new char[32];
}
}
private static ArrayList AL = new ArrayList(); //数据集
private static string strFile = "gshop.data";
/// <summary>
/// 判断指定的ListView是否有选择项目
/// </summary>
/// <param name="lv">传进来一个ListView</param>
/// <returns>有选项则返回True，否则返回false</returns>
private static Boolean lvSelected(ListView lv)
{
if (lv.SelectedItems.Count > 0)
{
return true;
}
else
{
return false;
}
}
/// <summary>
/// 写结构体
/// </summary>
void WriteStruct()
{
int ALCount = AL.Count;
FileStream fs = new FileStream(strFile, FileMode.Create);
ObjItem ts = new ObjItem(128,512,32);
byte[] count = BitConverter.GetBytes(ALCount);
fs.Write(count, 0, count.Length);
for (int i = 0; i <ALCount ; i++)
{
byte[] bytData = BytesStruct.StructToBytes((ObjItem)AL[i]);
fs.Write(bytData, 0, bytData.Length);
}
fs.Close();
}
/// <summary>
/// 读结构体
/// </summary>
void ReadStruct()
{
FileStream fs = new FileStream(strFile, FileMode.Open, FileAccess.Read);
BinaryReader r = new BinaryReader(fs);
int count = r.ReadInt32();
ObjItem ts = new ObjItem(128, 512, 32);
byte[] bytData = new byte[Marshal.SizeOf(ts)];
listView1.Items.Clear();
for (int i = 0; i < count; i++)
{
fs.Read(bytData, 0, bytData.Length);
ts = (ObjItem)BytesStruct.BytesToStuct(bytData, ts.GetType());
AL.Add(ts);
ListViewItem Item = new ListViewItem(((ObjItem)AL[i]).a1.ToString());
Item.SubItems.Add(Encoding.Unicode.GetString(Encoding.Unicode.GetBytes(((ObjItem)AL[i]).a21)));//char[]
listView1.Items.Add(Item);
}
fs.Close();
}
private void Form1_Load(object sender, EventArgs e)
{
#region 程序启动时做的事
listView1.View = View.Details;
listView1.FullRowSelect = true;
listView1.HideSelection = false;
listView1.MultiSelect = false;
listView1.Columns.Add("编号", 40, HorizontalAlignment.Left);
listView1.Columns.Add("名称",120,HorizontalAlignment.Left);
//控件Text设置
label1.Text = "ID";
label2.Text = "大分类";
label3.Text = "小分类";
label6.Text = "数量";
label7.Text = "价格";
label9.Text = "New";
label20.Text = "名称";
label21.Text = "说明";
//读数据
ReadStruct();
btnEdit.Enabled = false;
btnDel.Enabled = false;
#endregion
}
private void listView1_SelectedIndexChanged(object sender, EventArgs e)
{
#region ListView改变
if (lvSelected(listView1))
{
int NowIndex = listView1.SelectedItems[0].Index;
textBox1.Text = ((ObjItem)AL[NowIndex]).a1.ToString();
textBox2.Text = ((ObjItem)AL[NowIndex]).a2.ToString();
textBox3.Text = ((ObjItem)AL[NowIndex]).a3.ToString();
textBox4.Text = Encoding.Default.GetString(((ObjItem)AL[NowIndex]).a4);
textBox5.Text = ((ObjItem)AL[NowIndex]).a5.ToString();
textBox6.Text = ((ObjItem)AL[NowIndex]).a6.ToString();
textBox7.Text = ((ObjItem)AL[NowIndex]).a7.ToString();
textBox8.Text = ((ObjItem)AL[NowIndex]).a8.ToString();
textBox9.Text = ((ObjItem)AL[NowIndex]).a9.ToString();
textBox10.Text = ((ObjItem)AL[NowIndex]).a10.ToString();
textBox11.Text = ((ObjItem)AL[NowIndex]).a11.ToString();
textBox12.Text = ((ObjItem)AL[NowIndex]).a12.ToString();
textBox13.Text = ((ObjItem)AL[NowIndex]).a13.ToString();
textBox14.Text = ((ObjItem)AL[NowIndex]).a14.ToString();
textBox15.Text = ((ObjItem)AL[NowIndex]).a15.ToString();
textBox16.Text = ((ObjItem)AL[NowIndex]).a16.ToString();
textBox17.Text = ((ObjItem)AL[NowIndex]).a17.ToString();
textBox18.Text = ((ObjItem)AL[NowIndex]).a18.ToString();
textBox19.Text = ((ObjItem)AL[NowIndex]).a19.ToString();
textBox20.Text = Encoding.Unicode.GetString(Encoding.Unicode.GetBytes(((ObjItem)AL[NowIndex]).a21));
textBox21.Text = Encoding.Unicode.GetString(Encoding.Unicode.GetBytes(((ObjItem)AL[NowIndex]).a20));
btnEdit.Enabled = true;
btnDel.Enabled = true;
}
#endregion
}
private void btnDel_Click(object sender, EventArgs e)
{
#region 删除记录
if (lvSelected(listView1))
{
string str = "确定删除 " + listView1.SelectedItems[0].SubItems[1].Text + "？";
DialogResult Result = MessageBox.Show(str, "提示", MessageBoxButtons.OKCancel);
if (Result == System.Windows.Forms.DialogResult.OK)
{
int NowIndex = listView1.SelectedItems[0].Index;
AL.RemoveAt(NowIndex);
listView1.Items.RemoveAt(NowIndex);
if (listView1.Items.Count > 0)
{
if (NowIndex - 1 > 0)
{
listView1.Items[NowIndex - 1].Selected = true;
}
else
{
listView1.Items[0].Selected = true;
}
}
WriteStruct();
}
}
#endregion
}
private void btnEdit_Click(object sender, EventArgs e)
{
#region 修改记录
if (lvSelected(listView1))
{
int NowIndex = listView1.SelectedItems[0].Index;
ObjItem ts = new ObjItem(128, 512, 32);
ts.a1 = Convert.ToInt32(textBox1.Text.Trim());
ts.a2 = Convert.ToInt32(textBox2.Text.Trim());
ts.a3 = Convert.ToInt32(textBox3.Text.Trim());
byte[] a4 = Encoding.Default.GetBytes(textBox4.Text.Trim());
Array.Copy(a4, ts.a4, a4.Length);
ts.a5 = Convert.ToInt32(textBox5.Text.Trim());
ts.a6 = Convert.ToInt32(textBox6.Text.Trim());
ts.a7 = Convert.ToInt32(textBox7.Text.Trim());
ts.a8 = Convert.ToInt32(textBox8.Text.Trim());
ts.a9 = Convert.ToInt32(textBox9.Text.Trim());
ts.a10 = Convert.ToInt32(textBox10.Text.Trim());
ts.a11 = Convert.ToInt32(textBox11.Text.Trim());
ts.a12 = Convert.ToInt32(textBox12.Text.Trim());
ts.a13 = Convert.ToInt32(textBox13.Text.Trim());
ts.a14 = Convert.ToInt32(textBox14.Text.Trim());
ts.a15 = Convert.ToInt32(textBox15.Text.Trim());
ts.a16 = Convert.ToInt32(textBox16.Text.Trim());
ts.a17 = Convert.ToInt32(textBox17.Text.Trim());
ts.a18 = Convert.ToInt32(textBox18.Text.Trim());
ts.a19 = Convert.ToInt32(textBox19.Text.Trim());
char[] a20 = Encoding.Unicode.GetChars(Encoding.Unicode.GetBytes(textBox21.Text.Trim()));
Array.Copy(a20, ts.a20, a20.Length);
char[] a21 = Encoding.Unicode.GetChars(Encoding.Unicode.GetBytes(textBox20.Text.Trim()));
Array.Copy(a21, ts.a21, a21.Length);
AL[NowIndex] = ts;
listView1.SelectedItems[0].Text = ((ObjItem)AL[NowIndex]).a1.ToString();
listView1.SelectedItems[0].SubItems[1].Text = Encoding.Unicode.GetString(Encoding.Unicode.GetBytes(((ObjItem)AL[NowIndex]).a21));
WriteStruct();
}
#endregion
}
private void BtnAdd_Click(object sender, EventArgs e)
{
#region 添加记录
ObjItem ts = new ObjItem(128, 512, 32);
ts.a1 = Convert.ToInt32(textBox1.Text.Trim());
ts.a2 = Convert.ToInt32(textBox2.Text.Trim());
ts.a3 = Convert.ToInt32(textBox3.Text.Trim());
byte[] a4 = Encoding.Default.GetBytes(textBox4.Text.Trim());
Array.Copy(a4, ts.a4, a4.Length);
ts.a5 = Convert.ToInt32(textBox5.Text.Trim());
ts.a6 = Convert.ToInt32(textBox6.Text.Trim());
ts.a7 = Convert.ToInt32(textBox7.Text.Trim());
ts.a8 = Convert.ToInt32(textBox8.Text.Trim());
ts.a9 = Convert.ToInt32(textBox9.Text.Trim());
ts.a10 = Convert.ToInt32(textBox10.Text.Trim());
ts.a11 = Convert.ToInt32(textBox11.Text.Trim());
ts.a12 = Convert.ToInt32(textBox12.Text.Trim());
ts.a13 = Convert.ToInt32(textBox13.Text.Trim());
ts.a14 = Convert.ToInt32(textBox14.Text.Trim());
ts.a15 = Convert.ToInt32(textBox15.Text.Trim());
ts.a16 = Convert.ToInt32(textBox16.Text.Trim());
ts.a17 = Convert.ToInt32(textBox17.Text.Trim());
ts.a18 = Convert.ToInt32(textBox18.Text.Trim());
ts.a19 = Convert.ToInt32(textBox19.Text.Trim());
char[] a20 = Encoding.Unicode.GetChars(Encoding.Unicode.GetBytes(textBox21.Text.Trim()));
Array.Copy(a20, ts.a20, a20.Length);
char[] a21 = Encoding.Unicode.GetChars(Encoding.Unicode.GetBytes(textBox20.Text.Trim()));
Array.Copy(a21, ts.a21, a21.Length);
AL.Add(ts);
ListViewItem Item = new ListViewItem(((ObjItem)AL[AL.Count - 1]).a1.ToString());
Item.SubItems.Add(Encoding.Unicode.GetString(Encoding.Unicode.GetBytes(((ObjItem)AL[AL.Count - 1]).a21)));
listView1.Items.Add(Item);
listView1.Items[listView1.Items.Count - 1].EnsureVisible();//滚到动指定行并显示
listView1.Items[listView1.Items.Count - 1].Selected = true;//选中选指行
WriteStruct();
#endregion
}
}
}