/// <summary>
/// 更新ListView中的项
/// </summary>
private void UpdateFileListView(out ListViewItem[] items, ref ScoreDoc[] scoreDocs, ref int indexRecord, int times)
{
//GetSystemIcon getIcon = new GetSystemIcon();//获取图标
string extenName = null; //扩展名
string name = null; //文件名
string length = null;
int k;
items = new ListViewItem[times];
for (int j = 0; j < times; j++)
{
Document doc = this.indexSearcher.Doc(scoreDocs[indexRecord++].doc);
name = doc.Get("Name");
length = doc.Get("Length");
//文件夹
if (length == "-1")
{
string[] subItem = { name, doc.Get("Directory"), "", doc.Get("LastWriteTime") };
items[j] = new ListViewItem(subItem, 0);//0为文件夹
}
else
{
string[] subItem = { name, doc.Get("Directory"),
Deal.FormatFileLength(length), doc.Get("LastWriteTime") };
k = name.LastIndexOf('.');
if (k > 0)
{
extenName = name.Substring(k, name.Length - k).ToLower();
//如果imageList里还没有该格式的图标，就添加
//文件夹，未知文件，mp3，jpg的图标已在主窗体创建时就加入ImageList中
if (this.form.imgIcon.Images.ContainsKey(extenName) == false)
{
Icon icon = GetSystemIcon.GetIconByFileType(extenName, false);
if (icon != null)
{
CrossThreadOperateControl CrossUpdateImageIcon = delegate()
{
this.form.imgIcon.Images.Add(extenName, icon);
};
this.form.Invoke(CrossUpdateImageIcon);//使用创建ImageList的线程调用
items[j] = new ListViewItem(subItem, extenName);
}
else
{
items[j] = new ListViewItem(subItem, 1);//1为未知文件
}
}
else
{
items[j] = new ListViewItem(subItem, extenName);
}
}
else
{
items[j] = new ListViewItem(subItem, 1);//1为未知文件
}
}
}
}
/// <summary>
/// 线程回调，执行完索引线程后对主线程做的操作。
/// </summary>
private void CallBack()
{
CrossThreadOperateControl CrossOperate = delegate()
{
lock (this.form)
{
this.form.IsIndex = false;
this.form.索引ToolStripMenuItem.Enabled = true;
this.form.停止更新ToolStripMenuItem.Enabled = false;
}
};
this.form.Invoke(CrossOperate);
}
/// <summary>
/// 线程执行完后回调
/// </summary>
private void CallBack()
{
if (this.isSearchWithResult == false)
{
this.oldBoolQuery = (BooleanQuery)this.boolQuery.Clone();
}
else
{
//当前为结果中搜索，保留为原始的boolQuery。
}
CrossThreadOperateControl CrossOperate = delegate()
{
lock (this.form)
{
this.form.IsSearch = false;
this.form.SearchResult = this.form.OrginalStatusText;//更新搜索结果
this.form.索引ToolStripMenuItem.Enabled = true;
this.form.保存结果ToolStripMenuItem.Enabled = true;
this.form.CurrentPage = 1;
this.form.PageNums = this.pageNums;
if (this.pageNums > 1)
{
this.form.btnPrevious.Visible = true;
this.form.tsslPages.Visible = true;
this.form.btnNext.Visible = true;
this.form.btnPrevious.Enabled = false;
this.form.btnNext.Enabled = true;
this.form.tsslPages.Text = " " + this.currentPage + "/" + this.pageNums + " ";
}
else
{
this.form.btnPrevious.Visible = false;
this.form.tsslPages.Visible = false;
this.form.btnNext.Visible = false;
}
}
};
this.form.Invoke(CrossOperate);
}
private void UpdateListView(UpdateLVMethod method, int currentPage)
{
int TotalRecord = this.topDocs.scoreDocs.Length - ((this.currentPage - 1) * Static.PageItems); //总的数据项数
int EveryTimeRecord = 40; //每次批量增加的数量
int TotalTimes = TotalRecord / EveryTimeRecord; //批量添加的执行次数
int indexStart = (this.currentPage - 1) * Static.PageItems; //开始的index
int indexRecord = indexStart;
ScoreDoc[] scoreDocs = this.topDocs.scoreDocs;
for (int i = 0; i <= TotalTimes; i++)
{
if (this.isStopSearch == true)
{
return;
}
ListViewItem[] items;
if (i < TotalTimes) //i不是最后一次执行
{
method(out items, ref scoreDocs, ref indexRecord, EveryTimeRecord);
}
else
{
int lastQuantity = TotalRecord + indexStart - indexRecord;
method(out items, ref scoreDocs, ref indexRecord, lastQuantity);
}
CrossThreadOperateControl CrossUpdateListView = delegate()
{
lock (this.form.lvwFiles)
{
this.form.lvwFiles.BeginUpdate();
//利用AddRange批量增加，目的是减少刷屏次数，减轻不断闪烁问题。
this.form.lvwFiles.Items.AddRange(items);
this.form.lvwFiles.EndUpdate();
}
};
this.form.lvwFiles.Invoke(CrossUpdateListView);
}
}
/// <summary>
/// 获取当前页码所在页的数据并更新ListView
/// </summary>
public void GetCurrentPage()
{
try
{
this.topDocs = this.indexSearcher.Search(boolQuery, Static.PageItems * this.currentPage);
}
catch (Exception)
{
this.NullResult(); //空结果，修改主窗的status状态。
this.CallBack(); //线程执行完，修改主窗的相关属性。
return;
}
UpdateLVMethod method;
switch (this.searchMode)
{
case SearchMode.File:
method = new UpdateLVMethod(this.UpdateFileListView);
break;
case SearchMode.MP3:
method = new UpdateLVMethod(this.UpdateMP3ListView);
break;
default:
method = new UpdateLVMethod(this.UpdateMP3ListView);
break;
}
this.UpdateListView(method, this.currentPage);
CrossThreadOperateControl CrossOperate = delegate()
{
this.form.IsSearch = false;
this.form.索引ToolStripMenuItem.Enabled = true;
this.form.保存结果ToolStripMenuItem.Enabled = true;
};
this.form.Invoke(CrossOperate);
}
/// <summary>
/// 无结果或搜索时发生异常，修改主窗的status状态。
/// </summary>
private void NullResult()
{
this.dtStop = DateTime.Now;
//无结果时也是只有1页。
this.currentPage = 1;
this.pageNums = 1;
CrossThreadOperateControl CrossUpdateStatus = delegate()
{
lock (this.form)
{
this.form.IsSearch = false;
////无结果无法保存。
//this.form.保存结果ToolStripMenuItem.Enabled = false;
this.form.OrginalStatusText = "0 个对象 用时："
+ (this.dtStop - this.dtStart).TotalSeconds + "秒";
this.form.tsslStatus.Text = Deal.LimitStringLength(this.form.OrginalStatusText,
this.form.TsslLength);
}
};
this.form.Invoke(CrossUpdateStatus);
}
/// <summary>
/// 搜索文件
/// </summary>
public void SearchFile()
{
this.isStopSearch = false;
this.dtStart = DateTime.Now;//开始时间
if (this.indexSearcher == null)
{
this.NullResult(); //空结果，修改主窗的status状态。
this.CallBack(); //线程执行完，修改主窗的相关属性。
return;
}
Query query;
if (this.keyword.Name != "")
{
try
{
QueryParser parser = new QueryParser("Name", this.analyzer);
query = parser.Parse(this.keyword.Name);
boolQuery.Add(query, BooleanClause.Occur.MUST);
}
catch (Exception)
{ }
}
if (this.keyword.Directory != null && this.keyword.Directory != "")
{
PrefixQuery pq = new PrefixQuery(new Term("Directory", this.keyword.Directory));
boolQuery.Add(pq, BooleanClause.Occur.MUST);
}
if (this.keyword.Extension != null && this.keyword.Extension != "")
{
TermQuery termQuery = new TermQuery(new Term("Extension", this.keyword.Extension));
boolQuery.Add(termQuery, BooleanClause.Occur.MUST);
}
try
{
//搜索前Static.PageItems项
this.topDocs = this.indexSearcher.Search(boolQuery, Static.PageItems);
}
catch (Exception)
{
this.NullResult(); //空结果，修改主窗的status状态。
this.CallBack(); //线程执行完，修改主窗的相关属性。
return;
}
this.dtStop = DateTime.Now;//完成时间
if (this.topDocs.totalHits > 0)
{
CrossThreadOperateControl CrossUpdateStatus = delegate()
{
lock (this.form.tsslStatus)
{
this.form.OrginalStatusText = Deal.ToEnglishNumString(this.topDocs.totalHits)
+ " 个对象 用时：" + (this.dtStop - this.dtStart).TotalSeconds + "秒";
this.form.tsslStatus.Text = Deal.LimitStringLength(this.form.OrginalStatusText,
this.form.TsslLength);
}
};
this.form.Invoke(CrossUpdateStatus);
}
else
{
this.NullResult(); //空结果，修改主窗的status状态。
this.CallBack(); //线程执行完，修改主窗的相关属性。
return;
}
this.pageNums = topDocs.totalHits / Static.PageItems + 1; //总的页数
this.currentPage = 1; //每次搜索时当前页数为1
UpdateLVMethod method = new UpdateLVMethod(this.UpdateFileListView);
this.UpdateListView(method, this.currentPage);
this.CallBack();//线程执行完，修改主窗的相关属性。
}
/// <summary>
/// 用搜索的方式获取并显示艺术家和曲目数。
/// </summary>
public void ShowMP3Artist()
{
this.isStopSearch = false;
if (this.indexSearcher == null)
{
this.NullResult(); //空结果，修改主窗的status状态。
this.CallBack(); //线程执行完，修改主窗的相关属性。
return;
}
CrossThreadOperateControl CrossUpdateStatus = delegate()
{
lock (this.form)
{
this.form.OrginalStatusText = Deal.ToEnglishNumString(Static.MP3Artist.Count)
+ " 名艺术家 " + Deal.ToEnglishNumString(Static.MP3SongNums) + " 首曲目";
this.form.tsslStatus.Text = Deal.LimitStringLength(this.form.OrginalStatusText,
this.form.TsslLength);
}
};
this.form.Invoke(CrossUpdateStatus);
//该模式下只有1页，不用分页。
this.pageNums = 1;
this.currentPage = 1;
int TotalRecord; //总的数据项数
int EveryTimeRecord; //每次批量增加的数量
int TotalTimes; //批量添加的执行次数
int indexRecord = 0;
if (Static.MArtistInfo == null)
{
Static.MArtistInfo = new List <MP3ArtistInfo>();
Term termField = new Term("ArtistStore");
TotalRecord = Static.MP3Artist.Count; //总的数据项数
EveryTimeRecord = 50; //每次批量增加的数量
TotalTimes = TotalRecord / EveryTimeRecord; //批量添加的执行次数
for (int i = 0; i <= TotalTimes; i++)
{
if (this.isStopSearch == true)
{
break;
}
ListViewItem[] items;
if (i < TotalTimes) //i不是最后一次执行
{
this.UpadateArtistListView(out items, ref indexRecord, EveryTimeRecord, ref termField);
}
else
{
int lastQuantity = TotalRecord - indexRecord;
this.UpadateArtistListView(out items, ref indexRecord, lastQuantity, ref termField);
}
CrossThreadOperateControl CrossUpdateListView = delegate()
{
lock (this.form.lvwFiles)
{
this.form.lvwFiles.BeginUpdate();
//利用AddRange批量增加，目的是减少刷屏次数，减轻不断闪烁问题。
this.form.lvwFiles.Items.AddRange(items);
this.form.lvwFiles.EndUpdate();
}
};
this.form.lvwFiles.Invoke(CrossUpdateListView);
}
}
else
{
TotalRecord = Static.MArtistInfo.Count; //总的数据项数
EveryTimeRecord = 500; //每次批量增加的数量
TotalTimes = TotalRecord / EveryTimeRecord; //批量添加的执行次数
for (int i = 0; i <= TotalTimes; i++)
{
if (this.isStopSearch == true)
{
break;
}
ListViewItem[] items;
if (i < TotalTimes) //i不是最后一次执行
{
this.UpadateArtistListView(out items, ref indexRecord, EveryTimeRecord);
}
else
{
int lastQuantity = TotalRecord - indexRecord;
this.UpadateArtistListView(out items, ref indexRecord, lastQuantity);
}
CrossThreadOperateControl CrossUpdateListView = delegate()
{
lock (this.form.lvwFiles)
{
this.form.lvwFiles.BeginUpdate();
//利用AddRange批量增加，目的是减少刷屏次数，减轻不断闪烁问题。
this.form.lvwFiles.Items.AddRange(items);
this.form.lvwFiles.EndUpdate();
}
};
this.form.lvwFiles.Invoke(CrossUpdateListView);
}
}
this.CallBack();//线程执行完，修改主窗的相关属性。
}
public void StartSave()
{
DateTime dtStart = DateTime.Now;//开始时间
this.sw = new StreamWriter(this.fullName, false);
//输出保存时间
this.strLine = "保存时间：" + DateTime.Now.ToString();
this.sw.WriteLine(strLine);
this.sw.WriteLine();//换行
CrossThreadOperateControl CrossOperate = delegate()
{
if (this.lvStatus != ListViewStatus.MP3Artist)
{
//输出搜索关键字
this.strLine = "关键字：" + this.form.CurrentKeyword;
this.sw.WriteLine(strLine);
this.sw.WriteLine();//换行
//输出搜索结果信息
this.strLine = "搜索结果：" + this.form.SearchResult;
this.sw.WriteLine(strLine);
this.sw.WriteLine();//换行
}
else
{
this.strLine = "MP3索引数据库艺术家信息：";
this.sw.WriteLine(strLine);
this.sw.WriteLine();//换行
//输出搜索结果信息
this.strLine = this.form.SearchResult;
this.sw.WriteLine(strLine);
this.sw.WriteLine();//换行
}
//输出搜索结果
switch (this.lvStatus)
{
case ListViewStatus.File:
this.OutPutFile();
break;
case ListViewStatus.MP3:
this.OutPutMP3();
break;
case ListViewStatus.MP3Artist:
this.OutPutMP3Artist();
break;
}
this.sw.Close();
};
this.form.lvwFiles.Invoke(CrossOperate);
DateTime dtStop = DateTime.Now;//完成时间
string time = (dtStop - dtStart).TotalSeconds.ToString();
CrossThreadOperateControl CrossOperate2 = delegate()
{
this.saveForm.CallBack(time);
};
this.saveForm.Invoke(CrossOperate2);
}
