53、实现拖放操作
this.richTextBox1.AllowDrop = true;
private void richTextBox1_DragDrop(object sender,System.Windows.Forms.DragEventArgs e)
{
if (e.Data.GetDataPresent(DataFormats.Text))
{ e.Effect=DragDropEffects.Copy;}
else
{e.Effect = DragDropEffects.None;}
}
private void richTextBox1_DragEnter(object sender,System.Windows.Forms.DragEventArgs e)
{
if (e.Data.GetDataPresent(DataFormats.Text))
{ e.Effect=DragDropEffects.Copy;}
else
{e.Effect = DragDropEffects.None;}
}
54、图形文件的拖放操作
this.AllowDrop = true;
private void Form1_DragEnter(object sender, System.Windows.Forms.DragEventArgs e)
{
e.Effect = DragDropEffects.Copy;
String[] str_Drop=(String[])e.Data.GetData(DataFormats.FileDrop,true);;
string tempstr;
Bitmap bkImage;
tempstr = str_Drop[0];
try
{
bkImage = new Bitmap(tempstr);
this.Size = new System.Drawing.Size(bkImage.Width,
bkImage.Height);
this.BackgroundImage = bkImage;}
catch {}
}
55、分类枚举指定计算机的服务
private void button1_Click(object sender, System.EventArgs e)
{
string TempMachineName;
TempMachineName =this.textBox1.Text;
if (TempMachineName == "")
{
TempMachineName = System.Environment.MachineName;
//如果textBox1中为空,采用本地计算机
this.textBox1.Focus();
this.textBox1.Text = TempMachineName;
}
this.listBox1.Items.Clear();
this.listBox2.Items.Clear();
this.listBox3.Items.Clear();
ServiceController[] ArraySrvCtrl;
ArraySrvCtrl = ServiceController.GetServices(TempMachineName);
try
{
//在ArraySrvCtrl数组中存储所有服务
foreach (ServiceController tempSC in ArraySrvCtrl)
{
if (tempSC.Status == ServiceControllerStatus.Running)
{
listBox1.Items.Add(tempSC.DisplayName);
//将正在运行的服务添加到listBox1中
}
else if (tempSC.Status == ServiceControllerStatus.Paused)
{
listBox3.Items.Add(tempSC.DisplayName);
//'将暂停的服务添加到listBox3中
}
else
{
listBox2.Items.Add(tempSC.DisplayName);
//'将停止的服务添加到listBox2中
}
}
}
catch {}
}
56、响应文件系统事件
private void fileSystemWatcher1_Created(object sender, System.IO.FileSystemEventArgs e)
{
this.label1.Text = "文件: "+ e.FullPath.ToString()+ "已添加到你的目录中。";
}
private void fileSystemWatcher1_Renamed(object sender, System.IO.RenamedEventArgs e)
{
this.label2.Text=e.OldName.ToString() +"已经被重命名为:" +e.Name.ToString();
}
private void fileSystemWatcher1_Changed(object sender, System.IO.FileSystemEventArgs e)
{
MessageBox.Show( e.ChangeType.ToString() + " changed");
}
private void fileSystemWatcher1_Deleted(object sender, System.IO.FileSystemEventArgs e)
{
MessageBox.Show(e.Name + " Delete");
}
57、XML文件编辑器
string filePath;
DataSet dsAuthors=new DataSet("authors");
private void button1_Click(object sender, System.EventArgs e)
{
OpenFileDialog dlg = new OpenFileDialog();
dlg.Filter = "XML文件(*.XML)|*.xml";
dsAuthors.Clear();
if (dlg.ShowDialog()==DialogResult.OK & dlg.FileName!="")
{ //将XML文件的完整路径保存到filePath变量中
filePath = dlg.FileName;
try
{
dsAuthors.ReadXml(filePath);
dataGrid1.DataSource = dsAuthors;}
catch {}
}
}
private void button2_Click(object sender, System.EventArgs e)
{
dsAuthors.WriteXml(filePath);
}