/// <summary>
/// Event handler for CommandStateChange -- update our internal command states
/// then re-fire this event to listeners.
/// </summary>
/// <param name="sender">object sending the event</param>
/// <param name="e">event parameters</param>
private void AxWebBrowser_CommandStateChange(
object sender, DWebBrowserEvents2_CommandStateChangeEvent e)
{
// constants representing possible command state changes
const int CSC_UPDATECOMMANDS = -1;
const int CSC_NAVIGATEFORWARD = 1;
const int CSC_NAVIGATEBACK = 2;
// Back button state changed
if (e.command == CSC_NAVIGATEBACK)
{
m_goBackCommand.SetEnabled(e.enable);
}
// Forward button state changed
else if (e.command == CSC_NAVIGATEFORWARD)
{
m_goForwardCommand.SetEnabled(e.enable);
}
// General command state change
else if (e.command == CSC_UPDATECOMMANDS)
{
// Do manual update on m_stopCommand
m_stopCommand.SetEnabled(m_browser.Busy);
// No update needed for m_refreshCommand or m_goHomeCommand
// (both are always enabled)
}
// fire the CommandStateChanged event so listeners can update their UI
OnCommandStateChanged(EventArgs.Empty);
}
protected void AxWebBrowser_CommandStateChange(object sender, DWebBrowserEvents2_CommandStateChangeEvent e)
{
if (e.command.Equals(SHDocVw.CommandStateChangeConstants.CSC_NAVIGATEBACK))
{
MenuItem miView = MenuMain.MenuItems[2];
MenuItem miGoTo = miView.MenuItems[3];
miGoTo.MenuItems[0].Enabled = e.enable;
TbBack.Enabled = e.enable;
}
if (e.command.Equals(SHDocVw.CommandStateChangeConstants.CSC_NAVIGATEFORWARD))
{
MenuItem miView = MenuMain.MenuItems[2];
MenuItem miGoTo = miView.MenuItems[3];
miGoTo.MenuItems[1].Enabled = e.enable;
TbForward.Enabled = e.enable;
}
if (e.command.Equals(SHDocVw.CommandStateChangeConstants.CSC_UPDATECOMMANDS))
{
Int32 EnabledTest = Convert.ToInt32(SHDocVw.OLECMDF.OLECMDF_SUPPORTED)
+ Convert.ToInt32(SHDocVw.OLECMDF.OLECMDF_ENABLED);
bool RefreshTest = EnabledTest.Equals(AxWebBrowser.QueryStatusWB //Refresh
(SHDocVw.OLECMDID.OLECMDID_REFRESH));
TbRefresh.Enabled = RefreshTest;
TbMail.Enabled = RefreshTest;
TbEdit.Enabled = RefreshTest;
TbStop.Enabled = AxWebBrowser.Busy;
TbPrint.Enabled = EnabledTest.Equals(AxWebBrowser.QueryStatusWB
(SHDocVw.OLECMDID.OLECMDID_PRINT));
}
}
/// <summary>
/// 这里控制“前进”和“后退”按钮是否可用
/// </summary>
private void AxWebBrowser1_CommandStateChange(object sender, DWebBrowserEvents2_CommandStateChangeEvent e)
{
if (e.command == 1)
{
btnGoFoward.Enabled = e.enable;
}
else if (e.command == 2)
{
btnGoBack.Enabled = e.enable;
}
}
