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我们都听说过“ JavaScript ” 这个术语，但我们中只有少数人知道它的用法和应用。这里的“我们中的少数”是指技术青年、网络程序员和IT专业人员。但是，对于外行来说，“JavaScript”只不过是一个与计算机编程相关的复杂术语。
那么，什么是JavaScript？如果你希望在计算机领域工作，那么你不能错过JavaScript。它是最着名的网页脚本语言。它也广泛用于游戏开发以及桌面和移动应用程序的创建。此外，网站上很多基本功能如下拉菜单、视觉效果、验证数据等都是使用JavaScript创建的。当然，这只是一个概述。
学习JavaScript最好的方法之一是通过视频教程进行在线学习。这里列出十个免费在线学习JavaScript的地址，让你的学习更方便、更有效。
using System.Windows.Forms; using Leadtools; using Leadtools.Codecs; using Leadtools.WinForms; using Leadtools.Annotations;
RasterImageViewer viewer = new RasterImageViewer();
RasterImage img;
AnnAutomationManager annger;
AnnAutomation automation;private void initControl() {
Support.SetLicense();
viewer.Dock = DockStyle.Fill;
panel1.Controls.Add(viewer);
viewer.HorizontalAlignMode = RasterPaintAlignMode.Center;
viewer.VerticalAlignMode = RasterPaintAlignMode.Center;
loadImage("qwe.jpg");
if (viewer.Image != null)
{
// create and setup the automation manager
annger = new AnnAutomationManager();
// Instruct the manager to create the default (all) automation objects.
annger.CreateDefaultObjects();
// create the toolbar and add it to the form
annger.CreateToolBar();
Controls.Add(annger.ToolBar);
// setup the automation (will create the container as well)
automation = new AnnAutomation(annger, viewer);
// add an event handler for changes to the current designer
automation.CurrentDesignerChanged += new EventHandler(automation_CurrentDesignerChanged);
// setup this automation as the active one
automation.Active = true;
}
toolStripComboBox1.SelectedIndex = 0;
}
private void loadImage(string filename)
{
img = new RasterCodecs().Load(filename);
viewer.Image = img;
}
private void automation_CurrentDesignerChanged(object sender, EventArgs e)
{
AnnAutomation automation = sender as AnnAutomation;
AnnButtonRunDesigner buttonRunDesigner = automation.CurrentDesigner as AnnButtonRunDesigner;
if (buttonRunDesigner != null)
buttonRunDesigner.Run += new EventHandler(buttonRunDesigner_Run);
}private void buttonRunDesigner_Run(object sender, AnnRunDesignerEventArgs e)
{
if (e.OperationStatus == AnnDesignerOperationStatus.End)
{
AnnButtonObject btn = e.Object as AnnButtonObject;
MessageBox.Show(string.Format("Button with text = {0} was clicked!", btn.Text));
}
}
private void loadImage(string filename)
{
img = new RasterCodecs().Load(filename);
viewer.Image = img;
}
private void toolStripComboBox1_SelectedIndexChanged(object sender, EventArgs e)
{
annger.UserMode = (toolStripComboBox1.SelectedIndex == 0) ? AnnUserMode.Design : AnnUserMode.Run;
}
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