CefSharp Winforms - Execute javascript before showing browser
0
I am trying to load a page and execute some javascript before showing the browser to the user. This because i want to take them through some screens before they get it shown (selenium like), and i only want to show it when i require their input (Wich is after the 2nd pageload).
Unfortunatly i cant go to that page directly, i have to click a link first. But whatever i try, it will still show the browser, then execute the javascript. My current test is below, was playing around with browser.visible, but that doesnt work either, i still see the js being executed.
(Site and javascript are dummy values)
public ChromiumWebBrowser browser;
public void InitBrowser()
{
Cef.Initialize(new CefSettings());
browser = new ChromiumWebBrowser("https://www.bing.com/");
this.Controls.Add(browser);
browser.Visible = false;
browser.FrameLoadEnd += (sender, args) =>
{
//Wait for the MainFrame to finish loading
if (args.Frame.IsMain)
{
//do this first
browser.ExecuteScriptAsyncWhenPageLoaded("document.getElementById('sb_form_q').value = 'test';",true);
browser.ExecuteScriptAsyncWhenPageLoaded("document.getElementById('sb_form_go').click();",true);
}
};
browser.FrameLoadEnd += (sender, args) =>
{
//Wait for the MainFrame to finish loading
if (args.Frame.IsMain)
{
//when page is loaded again, do this:
browser.ExecuteScriptAsync("document.getElementById('hplogo').src='https://logos-download.com/wp-content/uploads/2016/02/bing-tm-logo.png'");
}
};
//then show browser again
browser.Visible = true;
}
c# cefsharp
asked Nov 28 '18 at 22:07
Martijn DeleijMartijn Deleij
76
add a comment |
0
I am trying to load a page and execute some javascript before showing the browser to the user. This because i want to take them through some screens before they get it shown (selenium like), and i only want to show it when i require their input (Wich is after the 2nd pageload).
Unfortunatly i cant go to that page directly, i have to click a link first. But whatever i try, it will still show the browser, then execute the javascript. My current test is below, was playing around with browser.visible, but that doesnt work either, i still see the js being executed.
(Site and javascript are dummy values)
public ChromiumWebBrowser browser;
public void InitBrowser()
{
Cef.Initialize(new CefSettings());
browser = new ChromiumWebBrowser("https://www.bing.com/");
this.Controls.Add(browser);
browser.Visible = false;
browser.FrameLoadEnd += (sender, args) =>
{
//Wait for the MainFrame to finish loading
if (args.Frame.IsMain)
{
//do this first
browser.ExecuteScriptAsyncWhenPageLoaded("document.getElementById('sb_form_q').value = 'test';",true);
browser.ExecuteScriptAsyncWhenPageLoaded("document.getElementById('sb_form_go').click();",true);
}
};
browser.FrameLoadEnd += (sender, args) =>
{
//Wait for the MainFrame to finish loading
if (args.Frame.IsMain)
{
//when page is loaded again, do this:
browser.ExecuteScriptAsync("document.getElementById('hplogo').src='https://logos-download.com/wp-content/uploads/2016/02/bing-tm-logo.png'");
}
};
//then show browser again
browser.Visible = true;
}
c# cefsharp
asked Nov 28 '18 at 22:07
Martijn DeleijMartijn Deleij
76
You are settingVisible = falsethen adding actions to events (not executing the actions) then settingVisible = truewhen the events might not have fired yet. Try puttingbrowser.Visible = truewithin one of the events or create a new event to trigger it to show or use.ContinueWith( () => { browser.Visible = true; } );
– Minijack
Nov 28 '18 at 22:11
You can connectPuppeteer Sharpto a running instance for automation purposes. Your code doesn't handle theFrameLoadEndevent properly, subscribing twice doesn't mean first run will be first handler, second will be second handler. Both handlers will fire. You have to subscribe, unsubscribe, subscribe a different handler. Or just check the frame url in the one handler.
– amaitland
Nov 29 '18 at 0:14
How can i check the frameurl in a handler? .Adress doesnt exist according to VS
– Martijn Deleij
Nov 29 '18 at 5:55
cefsharp.github.io/api/67.0.0/html/P_CefSharp_IFrame_Url.htm
– amaitland
Nov 29 '18 at 10:04
add a comment |
0
0
0
I am trying to load a page and execute some javascript before showing the browser to the user. This because i want to take them through some screens before they get it shown (selenium like), and i only want to show it when i require their input (Wich is after the 2nd pageload).
Unfortunatly i cant go to that page directly, i have to click a link first. But whatever i try, it will still show the browser, then execute the javascript. My current test is below, was playing around with browser.visible, but that doesnt work either, i still see the js being executed.
(Site and javascript are dummy values)
public ChromiumWebBrowser browser;
public void InitBrowser()
{
Cef.Initialize(new CefSettings());
browser = new ChromiumWebBrowser("https://www.bing.com/");
this.Controls.Add(browser);
browser.Visible = false;
browser.FrameLoadEnd += (sender, args) =>
{
//Wait for the MainFrame to finish loading
if (args.Frame.IsMain)
{
//do this first
browser.ExecuteScriptAsyncWhenPageLoaded("document.getElementById('sb_form_q').value = 'test';",true);
browser.ExecuteScriptAsyncWhenPageLoaded("document.getElementById('sb_form_go').click();",true);
}
};
browser.FrameLoadEnd += (sender, args) =>
{
//Wait for the MainFrame to finish loading
if (args.Frame.IsMain)
{
//when page is loaded again, do this:
browser.ExecuteScriptAsync("document.getElementById('hplogo').src='https://logos-download.com/wp-content/uploads/2016/02/bing-tm-logo.png'");
}
};
//then show browser again
browser.Visible = true;
}
c# cefsharp
asked Nov 28 '18 at 22:07
Martijn DeleijMartijn Deleij
76
I am trying to load a page and execute some javascript before showing the browser to the user. This because i want to take them through some screens before they get it shown (selenium like), and i only want to show it when i require their input (Wich is after the 2nd pageload).
Unfortunatly i cant go to that page directly, i have to click a link first. But whatever i try, it will still show the browser, then execute the javascript. My current test is below, was playing around with browser.visible, but that doesnt work either, i still see the js being executed.
(Site and javascript are dummy values)
public ChromiumWebBrowser browser;
public void InitBrowser()
{
Cef.Initialize(new CefSettings());
browser = new ChromiumWebBrowser("https://www.bing.com/");
this.Controls.Add(browser);
browser.Visible = false;
browser.FrameLoadEnd += (sender, args) =>
{
//Wait for the MainFrame to finish loading
if (args.Frame.IsMain)
{
//do this first
browser.ExecuteScriptAsyncWhenPageLoaded("document.getElementById('sb_form_q').value = 'test';",true);
browser.ExecuteScriptAsyncWhenPageLoaded("document.getElementById('sb_form_go').click();",true);
}
};
browser.FrameLoadEnd += (sender, args) =>
{
//Wait for the MainFrame to finish loading
if (args.Frame.IsMain)
{
//when page is loaded again, do this:
browser.ExecuteScriptAsync("document.getElementById('hplogo').src='https://logos-download.com/wp-content/uploads/2016/02/bing-tm-logo.png'");
}
};
//then show browser again
browser.Visible = true;
}
c# cefsharp
c# cefsharp
asked Nov 28 '18 at 22:07
Martijn DeleijMartijn Deleij
76
asked Nov 28 '18 at 22:07
Martijn DeleijMartijn Deleij
76
asked Nov 28 '18 at 22:07
Martijn DeleijMartijn Deleij
76
asked Nov 28 '18 at 22:07
Martijn DeleijMartijn Deleij
76
asked Nov 28 '18 at 22:07
Martijn DeleijMartijn Deleij
76
76
You are settingVisible = falsethen adding actions to events (not executing the actions) then settingVisible = truewhen the events might not have fired yet. Try puttingbrowser.Visible = truewithin one of the events or create a new event to trigger it to show or use.ContinueWith( () => { browser.Visible = true; } );
– Minijack
Nov 28 '18 at 22:11
You can connectPuppeteer Sharpto a running instance for automation purposes. Your code doesn't handle theFrameLoadEndevent properly, subscribing twice doesn't mean first run will be first handler, second will be second handler. Both handlers will fire. You have to subscribe, unsubscribe, subscribe a different handler. Or just check the frame url in the one handler.
– amaitland
Nov 29 '18 at 0:14
How can i check the frameurl in a handler? .Adress doesnt exist according to VS
– Martijn Deleij
Nov 29 '18 at 5:55
cefsharp.github.io/api/67.0.0/html/P_CefSharp_IFrame_Url.htm
– amaitland
Nov 29 '18 at 10:04
add a comment |
You are settingVisible = falsethen adding actions to events (not executing the actions) then settingVisible = truewhen the events might not have fired yet. Try puttingbrowser.Visible = truewithin one of the events or create a new event to trigger it to show or use.ContinueWith( () => { browser.Visible = true; } );
– Minijack
Nov 28 '18 at 22:11
You can connectPuppeteer Sharpto a running instance for automation purposes. Your code doesn't handle theFrameLoadEndevent properly, subscribing twice doesn't mean first run will be first handler, second will be second handler. Both handlers will fire. You have to subscribe, unsubscribe, subscribe a different handler. Or just check the frame url in the one handler.
– amaitland
Nov 29 '18 at 0:14
How can i check the frameurl in a handler? .Adress doesnt exist according to VS
– Martijn Deleij
Nov 29 '18 at 5:55
cefsharp.github.io/api/67.0.0/html/P_CefSharp_IFrame_Url.htm
– amaitland
Nov 29 '18 at 10:04
You are setting
Visible = false then adding actions to events (not executing the actions) then setting Visible = true when the events might not have fired yet. Try putting browser.Visible = true within one of the events or create a new event to trigger it to show or use .ContinueWith( () => { browser.Visible = true; } );– Minijack
Nov 28 '18 at 22:11
You are setting
Visible = false then adding actions to events (not executing the actions) then setting Visible = true when the events might not have fired yet. Try putting browser.Visible = true within one of the events or create a new event to trigger it to show or use .ContinueWith( () => { browser.Visible = true; } );– Minijack
Nov 28 '18 at 22:11
You can connect
Puppeteer Sharp to a running instance for automation purposes. Your code doesn't handle the FrameLoadEnd event properly, subscribing twice doesn't mean first run will be first handler, second will be second handler. Both handlers will fire. You have to subscribe, unsubscribe, subscribe a different handler. Or just check the frame url in the one handler.– amaitland
Nov 29 '18 at 0:14
You can connect
Puppeteer Sharp to a running instance for automation purposes. Your code doesn't handle the FrameLoadEnd event properly, subscribing twice doesn't mean first run will be first handler, second will be second handler. Both handlers will fire. You have to subscribe, unsubscribe, subscribe a different handler. Or just check the frame url in the one handler.– amaitland
Nov 29 '18 at 0:14
How can i check the frameurl in a handler? .Adress doesnt exist according to VS
– Martijn Deleij
Nov 29 '18 at 5:55
How can i check the frameurl in a handler? .Adress doesnt exist according to VS
– Martijn Deleij
Nov 29 '18 at 5:55
cefsharp.github.io/api/67.0.0/html/P_CefSharp_IFrame_Url.htm
– amaitland
Nov 29 '18 at 10:04
cefsharp.github.io/api/67.0.0/html/P_CefSharp_IFrame_Url.htm
– amaitland
Nov 29 '18 at 10:04
add a comment |
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You are setting
Visible = falsethen adding actions to events (not executing the actions) then settingVisible = truewhen the events might not have fired yet. Try puttingbrowser.Visible = truewithin one of the events or create a new event to trigger it to show or use.ContinueWith( () => { browser.Visible = true; } );– Minijack
Nov 28 '18 at 22:11
You can connect
Puppeteer Sharpto a running instance for automation purposes. Your code doesn't handle theFrameLoadEndevent properly, subscribing twice doesn't mean first run will be first handler, second will be second handler. Both handlers will fire. You have to subscribe, unsubscribe, subscribe a different handler. Or just check the frame url in the one handler.– amaitland
Nov 29 '18 at 0:14
How can i check the frameurl in a handler? .Adress doesnt exist according to VS
– Martijn Deleij
Nov 29 '18 at 5:55
cefsharp.github.io/api/67.0.0/html/P_CefSharp_IFrame_Url.htm
– amaitland
Nov 29 '18 at 10:04