CefSharp基于.Net Framework 4.0 框架编译

1>------ Rebuild All started: Project: CefSharp, Configuration: Debug x64 ------
1>CSC : error CS7027: Error signing output with public key from file '..\CefSharp.snk' -- File not found.
========== Rebuild All: 0 succeeded, 1 failed, 0 skipped ==========

namespace CefSharp.ExHelper
{
    /// <summary>
    /// https://referencesource.microsoft.com/#System/net/System/Net/HttpListenerRequest.cs,80a5cbf6a66fa610
    /// </summary>
    public class WebUtilityHelper
    {
        private int _bufferSize;

        // Accumulate characters in a special array
        private int _numChars;
        private char[] _charBuffer;

        // Accumulate bytes for decoding into characters in a special array
        private int _numBytes;
        private byte[] _byteBuffer;

        // Encoding to convert chars to bytes
        private Encoding _encoding;

        internal WebUtilityHelper(int bufferSize, Encoding encoding)
        {
            _bufferSize = bufferSize;
            _encoding = encoding;

            _charBuffer = new char[bufferSize];
            // byte buffer created on demand
        }

        public static string UrlDecode(string encodedValue)
        {
            if (encodedValue == null)
                return null;

            return UrlDecodeInternal(encodedValue, Encoding.UTF8);
        }

        private static string UrlDecodeInternal(string value, Encoding encoding)
        {
            if (value == null)
            {
                return null;
            }

            int count = value.Length;
            WebUtilityHelper helper = new WebUtilityHelper(count, encoding);

            // go through the string's chars collapsing %XX and
            // appending each char as char, with exception of %XX constructs
            // that are appended as bytes

            for (int pos = 0; pos < count; pos++)
            {
                char ch = value[pos];

                if (ch == '+')
                {
                    ch = ' ';
                }
                else if (ch == '%' && pos < count - 2)
                {
                    int h1 = HexToInt(value[pos + 1]);
                    int h2 = HexToInt(value[pos + 2]);

                    if (h1 >= 0 && h2 >= 0)
                    {     // valid 2 hex chars
                        byte b = (byte)((h1 << 4) | h2);
                        pos += 2;

                        // don't add as char
                        helper.AddByte(b);
                        continue;
                    }
                }

                if ((ch & 0xFF80) == 0)
                    helper.AddByte((byte)ch); // 7 bit have to go as bytes because of Unicode
                else
                    helper.AddChar(ch);
            }

            return helper.GetString();
        }

        private static int HexToInt(char h)
        {
            return (h >= '0' && h <= '9') ? h - '0' :
            (h >= 'a' && h <= 'f') ? h - 'a' + 10 :
            (h >= 'A' && h <= 'F') ? h - 'A' + 10 :
            -1;
        }

        private void FlushBytes()
        {
            if (_numBytes > 0)
            {
                _numChars += _encoding.GetChars(_byteBuffer, 0, _numBytes, _charBuffer, _numChars);
                _numBytes = 0;
            }
        }

        internal void AddChar(char ch)
        {
            if (_numBytes > 0)
                FlushBytes();

            _charBuffer[_numChars++] = ch;
        }

        internal void AddByte(byte b)
        {
            if (_byteBuffer == null)
                _byteBuffer = new byte[_bufferSize];

            _byteBuffer[_numBytes++] = b;
        }

        internal String GetString()
        {
            if (_numBytes > 0)
                FlushBytes();

            if (_numChars > 0)
                return new String(_charBuffer, 0, _numChars);
            else
                return String.Empty;
        }
    }

}

var filePath = ExHelper.WebUtilityHelper.UrlDecode(Path.GetFullPath(Path.Combine(rootFolder, asbolutePath)));

Type type = XXX;
// 4.0版本
bool val = type.IsGenericType;
Type baseType = type.BaseType;
// 4.5以及以上版本
bool val = type.GetTypeInfo().IsGenericType;
Type baseType = type.GetTypeInfo().BaseType;

// 4.5之后
Task.Run
Task.FromResult
Task.Delay
// 4.0，加入了Bcl之后
TaskEx.Run
TaskEx.FromResult
TaskEx.Delay

<Import Project="..\CefSharp.props">

warning MSB3268: The primary reference "E:\Projects\CefSharp-DotNet4.0\CefSharp\bin\x64\Debug\CefSharp.dll" could not be resolved because it has an indirect dependency on the framework assembly "System.Runtime, Version=1.5.11.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a" which could not be resolved in the currently targeted framework. ".NETFramework,Version=v4.0". To resolve this problem, either remove the reference "E:\Projects\CefSharp-DotNet4.0\CefSharp\bin\x64\Debug\CefSharp.dll" or retarget your application to a framework version which contains "System.Runtime, Version=1.5.11.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a".

warning MSB3268: The primary reference "E:\Projects\CefSharp-DotNet4.0\CefSharp\bin\x64\Debug\CefSharp.dll" could not be resolved because it has an indirect dependency on the framework assembly "System.Threading.Tasks, Version=1.5.11.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a" which could not be resolved in the currently targeted framework. ".NETFramework,Version=v4.0". To resolve this problem, either remove the reference "E:\Projects\CefSharp-DotNet4.0\CefSharp\bin\x64\Debug\CefSharp.dll" or retarget your application to a framework version which contains "System.Threading.Tasks, Version=1.5.11.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a".

<......>
<Reference Include="System.ServiceModel" />
</ItemGroup>
<ItemGroup>
  <Reference Include="System.Runtime">
    <HintPath>..\packages\Microsoft.Bcl.1.1.10\lib\net40\System.Runtime.dll</HintPath>
  </Reference>
  <Reference Include="System.Threading.Tasks">           	       <HintPath>..\packages\Microsoft.Bcl.1.1.10\lib\net40\System.Threading.Tasks.dll</HintPath>
  </Reference>
</ItemGroup>
<ItemGroup>
  <ClCompile Include="AssemblyInfo.cpp" />
<......>

 <......>
 <ImportGroup Label="ExtensionTargets">
    <Import Project="..\packages\Microsoft.Bcl.Build.1.0.21\build\Microsoft.Bcl.Build.targets" Condition="Exists('..\packages\Microsoft.Bcl.Build.1.0.21\build\Microsoft.Bcl.Build.targets')" />
  </ImportGroup>
  <Target Name="EnsureNuGetPackageBuildImports" BeforeTargets="PrepareForBuild">
    <PropertyGroup>
      <ErrorText>This project references NuGet package(s) that are missing on this computer. Use NuGet Package Restore to download them.  For more information, see http://go.microsoft.com/fwlink/?LinkID=322105. The missing file is {0}.</ErrorText>
    </PropertyGroup>
    <Error Condition="!Exists('..\packages\Microsoft.Bcl.Build.1.0.21\build\Microsoft.Bcl.Build.targets')" Text="$([System.String]::Format('$(ErrorText)', '..\packages\Microsoft.Bcl.Build.1.0.21\build\Microsoft.Bcl.Build.targets'))" />
  </Target>
</Project>

<?xml version="1.0" encoding="utf-8"?>
<packages>
  <!-- cef.sdk是需要的依赖包 -->
  <package id="cef.sdk" version="79.1.36" targetFramework="native" />
  <package id="Microsoft.Bcl" version="1.1.10" targetFramework="net40" />
  <package id="Microsoft.Bcl.Async" version="1.0.168" targetFramework="net40" />
  <package id="Microsoft.Bcl.Build" version="1.0.21" targetFramework="net40" />
</packages>

error C2661: 'System::Reflection::PropertyInfo::GetValue': no overloaded function takes 1 arguments

error C2039: 'FromResult': is not a member of 'System::Threading::Tasks::Task'

1、
auto propertyValue = properties[i]->GetValue(obj); // 4.5.2
auto propertyValue = properties[i]->GetValue(obj, nullptr); // 4.0
2、
Task::FromResult(invalidFrameResponse); // 4.5.2
ExHelper::TaskHelper::FromResult(invalidFrameResponse); // 4.0 命名空间就对应的CefSharp里面的Helper

找不到命令的错误提示

public delegate void DownloadEventHandler<in T>(object sender, T args);
// 改成我们的自己的下载事件
public event DownloadEventHandler<DownloadItem> OnBeforeDownloadFired;
public event DownloadEventHandler<DownloadItem> OnDownloadUpdatedFired;

---------------------------
Microsoft Visual Studio
---------------------------
The imported project "E:\Projects\CefSharp-DotNet4.0\CefSharp.Native.props" was not found. Confirm that the path in the <Import> declaration is correct, and that the file exists on disk.  E:\Projects\CefSharp-DotNet4.0\CefSharp.WinForms.Example\CefSharp.WinForms.Example.csproj
---------------------------
确定   
---------------------------

<package id="cef.redist.x64" version="79.1.36" targetFramework="net462" />
<package id="cef.redist.x86" version="79.1.36" targetFramework="net462" />
<package id="Microsoft.Net.Compilers" version="2.9.0" targetFramework="net462" developmentDependency="true" />

locales(dir)
swiftshader(dir)
cef.pak
cef_100_percent.pak
cef_200_percent.pak
cef_extensions.pak
chrome_elf.dll
d3dcompiler_47.dll
devtools_resources.pak
icudtl.dat
libcef.dll
libEGL.dll
libGLESv2.dll
natives_blob.bin
README.txt
snapshot_blob.bin
v8_context_snapshot.bin

Miscrosoft.Threading.Tasks.dll
Miscrosoft.Threading.Tasks.Extensions.dll
Miscrosoft.Threading.Tasks.Extensions.Desktop.dll
System.IO.dll
System.Runtime.dll
System.Threading.Tasks.dll

CefSharp（C#）
CefSharp.Core（C++）
CefSharp.BrowserSubprocess.Core（C++）
CefSharp.BrowserSubprocess（C#）
CefSharp.WinForms（C#）