c# webBrowser 获取 post 返回的数据

Question

c# 如何 获取post 返回的数据 （部分未显示） post返回的是一个表格 但表格内容没有完全显示

Answer 1

可能对你有用的两个办法：
办法一：

c# - 如何使用WebBrowser控件发送POST数据来获取响应数据？ - IT工具网 https://www.coder.work/article/3055669

办法二：

.net - How can I access PostData from WebBrowser.Navigating event handler? - Stack Overflow I've got a windows form in Visual Studio 2008 using .NET 3.5 which has a WebBrowser control on it. I need to analyse the form's PostData in the Navigating event handler before the request is sent.... https://stackoverflow.com/questions/141626/how-can-i-access-postdata-from-webbrowser-navigating-event-handler

C#版本：

    /// <summary>
    /// Fires before navigation occurs in the given object (on either a window or frameset element).
    /// </summary>
    /// <param name="pDisp">Object that evaluates to the top level or frame WebBrowser object corresponding to the navigation.</param>
    /// <param name="url">String expression that evaluates to the URL to which the browser is navigating.</param>
    /// <param name="Flags">Reserved. Set to zero.</param>
    /// <param name="TargetFrameName">String expression that evaluates to the name of the frame in which the resource will be displayed, or Null if no named frame is targeted for the resource.</param>
    /// <param name="PostData">Data to send to the server if the HTTP POST transaction is being used.</param>
    /// <param name="Headers">Value that specifies the additional HTTP headers to send to the server (HTTP URLs only). The headers can specify such things as the action required of the server, the type of data being passed to the server, or a status code.</param>
    /// <param name="Cancel">Boolean value that the container can set to True to cancel the navigation operation, or to False to allow it to proceed.</param>
    private delegate void BeforeNavigate2(object pDisp, ref dynamic url, ref dynamic Flags, ref dynamic TargetFrameName, ref dynamic PostData, ref dynamic Headers, ref bool Cancel);

    private void Form1_Load(object sender, EventArgs e)
    {
        dynamic d = webBrowser1.ActiveXInstance;

        d.BeforeNavigate2 += new BeforeNavigate2((object pDisp,
            ref dynamic url,
            ref dynamic Flags,
            ref dynamic TargetFrameName,
            ref dynamic PostData,
            ref dynamic Headers,
            ref bool Cancel) => {

            // Do something with PostData
        });
    }

C# WPF 版本
保留上述内容，但替换：

    dynamic d = webBrowser1.ActiveXInstance;

和：

    using System.Reflection;
    ...
    PropertyInfo prop = typeof(System.Windows.Controls.WebBrowser).GetProperty("ActiveXInstance", BindingFlags.NonPublic | BindingFlags.Instance);
    MethodInfo getter = prop.GetGetMethod(true);
    dynamic d = getter.Invoke(webBrowser1, null);

或者下面的方法：

NET WebBrowser 控件不公开该功能。幸运的是，该控件主要是“旧”控件的包装。这意味着您可以使用类似以下内容（在向您的项目添加对 SHDocVw 的引用之后）订阅您知道和喜爱的 BeforeNavigate2 事件（？）：

Dim ie = DirectCast(WebBrowser1.ActiveXInstance, SHDocVw.InternetExplorer)
AddHandler ie.BeforeNavigate2, AddressOf WebBrowser_BeforeNavigate2

... 并对该事件中的 PostData 执行任何您想要的操作：

Private Sub WebBrowser_BeforeNavigate2(ByVal pDisp As Object, ByRef URL As Object, _
       ByRef Flags As Object, ByRef TargetFrameName As Object, _
       ByRef PostData As Object, ByRef Headers As Object, ByRef Cancel As Boolean)
    Dim PostDataText = System.Text.Encoding.ASCII.GetString(PostData)
End Sub