C# WebBrowser 设置独立的代理

近期需要对webbrower设置代理，找到了如下方案：

1.

对修改注册表，设置全局代理

这种方法限制在一个进程内只能设置或取消代理，而且是全局代理，对于部分不需要代理对功能会产生影响

2.

通过函数InternetSetOption实现修改当前程序中的WebBrowser设置

static class WebBrowserProxy
 
{
 
    struct Struct_INTERNET_PROXY_INFO
 
    {
 
        public int dwAccessType;
 
        public IntPtr proxy;
 
        public IntPtr proxyBypass;
 
    };
 
 
 
    [DllImport("wininet.dll", SetLastError = true)]
 
    static extern bool InternetSetOption(IntPtr hInternet, int dwOption, IntPtr lpBuffer,int lpdwBufferLength);
 
 
 
    public static void SetProxy(string strProxy = "127.0.0.1:8888")
 
    {
 
        const int INTERNET_OPTION_PROXY = 38;
 
        const int INTERNET_OPEN_TYPE_PROXY = 3;
 
 
 
        Struct_INTERNET_PROXY_INFO struct_IPI;
 
 
 
        // Filling in structure
  
       struct_IPI.dwAccessType = INTERNET_OPEN_TYPE_PROXY;
 
        struct_IPI.proxy = Marshal.StringToHGlobalAnsi(strProxy);
 
        struct_IPI.proxyBypass = Marshal.StringToHGlobalAnsi("local");
 
 
 
        // Allocating memory
 
        IntPtr intptrStruct = Marshal.AllocCoTaskMem(Marshal.SizeOf(struct_IPI));
 
 
 
        // Converting structure to IntPtr
 
        Marshal.StructureToPtr(struct_IPI, intptrStruct, true);
 
        bool iReturn = InternetSetOption(IntPtr.Zero, INTERNET_OPTION_PROXY, intptrStruct, Marshal.SizeOf(struct_IPI));
 
    }
 
}

参考来源“https://blog.csdn.net/gold0523/article/details/38666701”