实例介绍
【实例简介】一个简单易上手的多媒体播放器
【实例截图】
【核心代码】
public partial class frmMain : Form
{
public string initialFileName = string.Empty;//传入的参数
public int playState = 1;//播放状态
public string defaultExeName = "mp3";//默认文件类型
public frmMain()
{
InitializeComponent();
}
public frmMain(string fileName)
{
InitializeComponent();
this.initialFileName = fileName;
}
private void frmMain_Load(object sender, EventArgs e)
{
InitialPlayList();
GetDefaultExeName();
GetState();
if (this.initialFileName!=string.Empty)
{
addFileName(this.initialFileName);
}
}
/// <summary>
/// 初始化、从文件读取
/// </summary>
public void InitialPlayList()
{
if (!File.Exists("config/PlayList.popMusic"))
{
return;
}
this.tvList.Nodes[0].Nodes.Clear();
FileStream fs = new FileStream("config/PlayList.popMusic", FileMode.OpenOrCreate);
StreamReader sr = new StreamReader(fs);
string fileName = sr.ReadLine();
//从文本中读取
while (fileName != null)
{
int index = fileName.LastIndexOf(@"\");
string exeName = fileName.Substring(index 1);
AddTreeNode(fileName, exeName);
fileName = sr.ReadLine();
}
sr.Close();
fs.Close();
this.tvList.Nodes[0].ExpandAll();
}
/// <summary>
/// 保存播放列表
/// </summary>
public void SaveList()
{
FileStream fs = new FileStream("config/PlayList.popMusic", FileMode.Create);
StreamWriter sw = new StreamWriter(fs);
foreach (TreeNode tn in this.tvList.Nodes[0].Nodes)
{
sw.WriteLine(tn.Tag.ToString());
}
sw.Close();
fs.Close();
}
/// <summary>
/// 设置默认文件类型
/// </summary>
/// <param name="op"></param>
public void SaveDefaultExeName()
{
FileStream fs = new FileStream("config/DefaultExeName.popMusic", FileMode.Create);
StreamWriter sw = new StreamWriter(fs);
sw.WriteLine(this.defaultExeName.ToLower());
sw.Close();
fs.Close();
}
/// <summary>
/// 获得默认文件类型
/// </summary>
/// <returns></returns>
public void GetDefaultExeName()
{
if (!File.Exists("config/DefaultExeName.popMusic"))
{
return;
}
FileStream fs = new FileStream("config/DefaultExeName.popMusic", FileMode.OpenOrCreate);
StreamReader sr = new StreamReader(fs);
this.defaultExeName = sr.ReadLine().ToLower();
sr.Close();
fs.Close();
if (this.defaultExeName == "mp3")
{
this.ofd.Filter = "音频文件|*.mp3|视频文件|*.mp4";
this.ofd.DefaultExt = "mp3";
}
else
{
this.ofd.Filter = "视频文件|*.mp4|音频文件|*.mp3";
this.ofd.DefaultExt = "mp4";
}
}
/// <summary>
/// 设置播放状态
/// </summary>
/// <param name="op"></param>
public void SaveState()
{
FileStream fs = new FileStream("config/State.popMusic", FileMode.Create);
StreamWriter sw = new StreamWriter(fs);
sw.WriteLine(this.playState);
sw.Close();
fs.Close();
}
/// <summary>
/// 获得播放状态
/// </summary>
/// <returns></returns>
public void GetState()
{
if (!File.Exists("config/State.popMusic"))
{
return;
}
FileStream fs = new FileStream("config/State.popMusic", FileMode.OpenOrCreate);
StreamReader sr = new StreamReader(fs);
this.playState = int.Parse(sr.ReadLine());
sr.Close();
fs.Close();
}
/// <summary>
/// 打开文件播放
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void 打开文件ToolStripMenuItem_Click(object sender, EventArgs e)
{
if (this.ofd.ShowDialog() == DialogResult.Cancel)
{
return;
}
string fileName = this.ofd.FileName;
addFileName(fileName);
int index = fileName.LastIndexOf(@".");
string exeName = fileName.Substring(index 1);
this.defaultExeName = exeName.ToLower();
}
public void addFileName(string fileName)
{
int index = fileName.LastIndexOf(@"\");
string exeName = fileName.Substring(index 1);
//如果播放列表已经有这个文件,就选中列表里的项
foreach (TreeNode t in this.tvList.Nodes[0].Nodes)
{
string name = t.Text;
if (name.Contains(exeName))
{
this.tvList.SelectedNode = t;
play();
return;
}
}
TreeNode tn = AddTreeNode(fileName, exeName);
this.tvList.Nodes[0].ExpandAll();
this.tvList.SelectedNode = tn;
play();
}
/// <summary>
/// 添加一个节点
/// </summary>
/// <param name="fileName"></param>
/// <param name="exeName"></param>
public TreeNode AddTreeNode(string fileName,string exeName)
{
int count = this.tvList.Nodes[0].Nodes.Count 1;
string showCount = count.ToString();
if (count < 10)
{
showCount = "0" count;
}
TreeNode tn = new TreeNode(showCount " " exeName);
tn.Tag = fileName;
tn.ToolTipText = exeName;
this.tvList.Nodes[0].Nodes.Add(tn);
return tn;
}
private void cms_Opening(object sender, CancelEventArgs e)
{
if (this.tvList.Nodes[0].Nodes.Count<1)
{
this.下载ToolStripMenuItem.Enabled = false;
this.删除ToolStripMenuItem.Enabled = false;
this.清空播放列表ToolStripMenuItem.Enabled = false;
return;
}
else
{
this.下载ToolStripMenuItem.Enabled = true;
this.删除ToolStripMenuItem.Enabled = true;
this.清空播放列表ToolStripMenuItem.Enabled = true;
}
//再次判断
if (this.tvList.SelectedNode == null || this.tvList.SelectedNode.Level == 0)
{
this.下载ToolStripMenuItem.Enabled = false;
this.删除ToolStripMenuItem.Enabled = false;
}
else
{
this.下载ToolStripMenuItem.Enabled = true;
this.删除ToolStripMenuItem.Enabled = true;
}
}
private void 下载ToolStripMenuItem_Click(object sender, EventArgs e)
{
if (this.fbd.ShowDialog() == DialogResult.Cancel)
{
return;
}
string fileName = this.tvList.SelectedNode.Tag.ToString();
int index = fileName.LastIndexOf(@"\");
string exeName = fileName.Substring(index 1);
string toName = this.fbd.SelectedPath "\\" exeName;
File.Copy(fileName, toName);
MessageBox.Show("下载" exeName "成功!", "系统提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
}
private void 删除ToolStripMenuItem_Click(object sender, EventArgs e)
{
TreeNode tn = this.tvList.SelectedNode;
this.tvList.Nodes[0].Nodes[tn.Index].Remove();
//说明列表里还有
if (tvList.Nodes[0].Nodes.Count > 0)
{
SaveList();
InitialPlayList();
//如果当前是最后一项
if (tvList.SelectedNode.Index == tvList.Nodes[0].Nodes.Count - 1)
{
this.tvList.SelectedNode = tvList.Nodes[0].Nodes[0];
}
//不是最后一项
else
{
this.tvList.SelectedNode = tvList.Nodes[0].Nodes[tvList.SelectedNode.Index 1];
}
play();
}
else
{
this.mediaPlay.URL = "";
}
}
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