The name ChromiumWebBrowser does not exist in the namespace "clr-namespace:CefSharp.Wpf;assembly=CefSharp.Wpf"

Question

I had followed this link to implement CefSharp applicaton.

But I have stuck while coding MainWindow.xaml.

Blend for VS 2015 said,

The name ChromiumWebBrowser does not exist in the namespace "clr-namespace:CefSharp.Wpf;assembly=CefSharp.Wpf"

But I'm installed CefSharp.Common and CefSharp.Wpf v51.0.0, cef.redist.x64 and cef.redist.x86 v3.2704.1432 with NuGet Package Manager.

I'm new on developing C# so I don't know how to solve this problem. Please help me to solve this error.

This is my MainWindow.xaml

<Window x:Class="StocktalkBrowser.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
        xmlns:local="clr-namespace:StocktalkBrowser"
        xmlns:cefSharp="clr-namespace:CefSharp.Wpf;assembly=CefSharp.Wpf"
        mc:Ignorable="d"
        Title="MainWindow" Height="350" Width="525">
    <Grid>
        <cefSharp:ChromiumWebBrowser Grid.Row="0"  Address="https://github.com/cefsharp/CefSharp/wiki/Frequently-asked-questions" />
    </Grid>
</Window>

---

Venatic

Does it just say it as info, or it doesn't compile ? Sometimes the designer is really stupid and just tell you things, but the project will compile without any problem. Perhaps Clean your project and rebuild. Sometimes that also helps – Jeminah

@NawedNabiZada I tired it many times, but it doesn't matter. – Venatic

Does it compile ? – Jeminah

@NawedNabiZada Would you tell me where is defined clr namespaces? – Venatic

@NawedNabiZada no, It doen't. – Venatic

@NawedNabiZada Oh Sorry, it compiles but when I run output file, it stops. – Venatic

Answer 1

I just tried the link, and as I mentioned in the comments it compiles without any problem.

Can be ignored.

And the preview is not available as well, I learned to live with it.

No errors when compiling

And the program starts up. No problem

Jeminah

I don't know why, but it is running well now ! Thank you – Venatic

Answer 2

For me the problem was that the solution platform was set to AnyCPU.
As far as I know, CefSharp does not support AnyCPU. Interestingly the solution ran just fine in Release mode, but in Debug mode I immediately got an error - the invocation of the constructor on type that matches ... the specified binding constraints threw an exception.

As soon as I changed the solution platform to be only x64, then the XAML error went away (The name ChromiumWebBrowser does not exist in the namespace “clr-namespace:CefSharp.Wpf;assembly=CefSharp.Wpf”). And I could run the solution both in Debug and Release mode.

Monohydroxy

Thanks for your answer. But I retired using CdefSharp and moved to Electron. I'll try it again when I have time enough. Thank you Marko – Venatic

Answer 3

its not supported in the XAML desginer, so load it in run time:

1. Remove the element from the XAMl, and instead place any container such as a Border:

   <Border x:Name="cefChromeContainer" />
   

2. in the Constructor code, after InitializeComponent(); call, craete the browser element and place into the container. even better to declare the browser in the class scoop:

   CefSharp.Wpf.ChromiumWebBrowser browser = new CefSharp.Wpf.ChromiumWebBrowser();
   
   public MainWindow()
   {
       InitializeComponent();
       cefChromeContainer.Content = browser;
       browser.Address = "https://stackoverflow.com";
   }
   

Bumbailiff

Thanks a lot! but we chose Electron insteat. – Venatic

Answer 4

I had the same problem and i solve it changing configuration to from "debug" to "release" and using "x64" as platform.

But it was not enought to change it from the solution menú, as i usually do. You need to go to visual studio main menú under "Compile > Configuration administration", as you can see in the following link from Microsoft:

https://learn.microsoft.com/es-es/visualstudio/ide/how-to-configure-projects-to-target-platforms?view=vs-2015&redirectedfrom=MSDN#Anchor_0

This solution was in fact in the Readme.txt file for cefsharp, as stated in the "Documentation" link provided by saschad in his answer: https://github.com/cefsharp/CefSharp/blob/cefsharp/69/NuGet/Readme.txt

There you can read it:

• For x86 or x64set your solution target architecture tox86orx64`, just changing the project is currently not enough (See https://msdn.microsoft.com/en-us/library/ms185328.aspx#Anchor_0 for details).

Now I have it running like a charm :D

Imaginary

Answer 5

You can read in the (Documentation) of the NuGet package, it's also necessary to add an app.manifest to your Application.

Torque