// 当前列表的选中记录发生变化
private void listView_log_SelectedIndexChanged(object sender, EventArgs e)
{
if (this.listView_log.SelectedItems.Count > 0)
{
this._currentListViewItem = this.listView_log.SelectedItems[0];
this._currentID = this._currentListViewItem.Text;
NoteItem item = this._noteManager.Get(this._currentID);
// 将信息设到输入控件上
this.SetControlInfo(item);
//编辑与删除按钮可用
this.button_edit.Enabled = true;
this.button_delete.Enabled = true;
//this.button_add.Enabled = false;
}
else
{
this._currentListViewItem = null;
this._currentID = "";
// 编辑与删除按钮不可用
this.button_edit.Enabled = false;
this.button_delete.Enabled = false;
//this.button_add.Enabled = true;
// 清空控件
this.ClearControl();
}
}
/*
* <root>
* <note>
* <id>123</id>
* <title>test</title>
* <catalog/>
* <level/>
* <content/>
* <updateTime/>
* </note>
* <note>...</note>
* </root>
*/
private void ParseXml(XmlDocument dom)
{
XmlNode root = dom.DocumentElement;
XmlNodeList noteList = root.SelectNodes("note");
foreach (XmlNode node in noteList)
{
string id = DomUtil.GetElementText(node, "id");
string title = DomUtil.GetElementText(node, "title");
string catalog = DomUtil.GetElementText(node, "catalog");
string level = DomUtil.GetElementText(node, "level");
string content = DomUtil.GetElementText(node, "content");
string updateTime = DomUtil.GetElementText(node, "updateTime");
// 创建NoteItem对象
NoteItem item = new NoteItem()
{
ID = id,
Title = title,
Catalog = catalog,
Level = level,
Content = content,
UpdateTime = updateTime,
};
// 加到集合中
this.Notes.Add(item);
}
}
//删除事项
public void Delete(string id)
{
NoteItem item = this.Get(id);
if (item != null)
{
// 从集合中移除
this.Notes.Remove(item);
}
}
// 根据内存对象设置界面信息
private void SetControlInfo(NoteItem item)
{
if (item == null)
{
return;
}
this._currentID = item.ID;
this.textBox_title.Text = item.Title;
this.textBox_catalog.Text = item.Catalog;
this.comboBox_level.Text = item.Level;
this.textBox_content.Text = item.Content;
this.textBox_updateTime.Text = item.UpdateTime;
}
// 新增事项
public void Add(NoteItem item)
{
Debug.Assert(item != null, "item参数不能为null");
NoteItem temp = this.Get(item.ID);
if (temp != null)
{
throw new Exception("id为[" + item.ID + "]的事项已经存在.");
}
// 加到集合中
this.Notes.Add(item);
}
// 将内存对象NoteItem加到界面列表中
private void AddToListView(NoteItem note)
{
//给界面的listview填加一行
ListViewItem item = new ListViewItem();
item.Text = note.ID;
item.SubItems.Add(note.Title);
item.SubItems.Add(note.Catalog);
item.SubItems.Add(note.Level);
item.SubItems.Add(note.UpdateTime);
item.SubItems.Add(note.Content);
this.listView_log.BeginUpdate();
this.listView_log.Items.Add(item);
this.listView_log.Items[this.listView_log.Items.Count - 1].EnsureVisible();//滚动到最后
this.listView_log.EndUpdate();
}
// 编辑事项
public void Edit(NoteItem item)
{
Debug.Assert(item != null, "item参数不能为null");
NoteItem oldItem = this.Get(item.ID);
if (oldItem == null)
{
throw new Exception("id为[" + item.ID + "]的事项不存在.");
}
// 更新内存中的数据
oldItem.Title = item.Title;
oldItem.Catalog = item.Catalog;
oldItem.Level = item.Level;
oldItem.Content = item.Content;
oldItem.UpdateTime = item.UpdateTime;
}
//编辑
private void Edit()
{
if (string.IsNullOrEmpty(this._currentID) == false)
{
NoteItem note = this.CreateNoteItem(false);
this._noteManager.Edit(note);
// 更新listview当前记录
this._currentListViewItem.SubItems.Clear();
ListViewItem item = this._currentListViewItem;
item.Text = note.ID;
item.SubItems.Add(note.Title);
item.SubItems.Add(note.Catalog);
item.SubItems.Add(note.Level);
item.SubItems.Add(note.UpdateTime);
item.SubItems.Add(note.Content);
// 清空控件
this.ClearControl();
}
}
// 根据界面输入的信息创建一个NoteItem对象
private NoteItem CreateNoteItem(bool bNew)
{
string id = "";
if (bNew == true)
{
id = Guid.NewGuid().ToString();
}
else
{
id = this._currentID;
}
string title = this.textBox_title.Text.Trim();
if (title == "")
{
MessageBox.Show(this, "尚未输入标题");
return(null);
}
string catalog = this.textBox_catalog.Text.Trim();
string level = this.comboBox_level.Text;
string content = this.textBox_content.Text.Trim();
string updateTime = GetNowTime();
NoteItem note = new NoteItem()
{
ID = id,
Title = title,
Level = level,
Catalog = catalog,
Content = content,
UpdateTime = updateTime,
};
return(note);
}
// 新增按钮，点击事件
private void button_add_Click(object sender, EventArgs e)
{
NoteItem note = this.CreateNoteItem(true);
if (note == null)
{
return;
}
//// 清空当前记录
this._currentID = "";
this._currentListViewItem = null;
this.button_delete.Enabled = false;
this.button_edit.Enabled = false;
// 给内存集合增加一条记录
this._noteManager.Add(note);
//给界面的listview填加一行
this.AddToListView(note);
// 清空控件
this.ClearControl();
}
