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How to POST a FORM from HTML to ASPX page

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你的背包 2020-11-30 03:36

How do I post a form from an HTML page to and ASPX page (2.0) and be able to read the values?

I currently have an ASP.NET site using the Membership provider and ever

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  • 野性不改
    2020-11-30 03:44

    Are you sure your HTML form is correct, and does, in fact, do an HTTP POST? I would suggest running Fiddler2, and then trying to log in via your Login.aspx, then the remote HTML site, and then comparing the requests that are sent to the server. For me, ASP.Net always worked fine -- if HTTP request contains a valid POST, I can get to values using Request.Form...

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  • 眼角桃花
    2020-11-30 03:47

    Hope this will help - Put this tag in html and

    remove your login.aspx design content..just write only page directive

    and you will get the values in aspx page after submit button click like this- protected void Page_Load(object sender, EventArgs e) {

            if (!IsPostBack)
        {
            CompleteRegistration();
        }
    }

    public void CompleteRegistration() {

            NameValueCollection nv = Request.Form;
        if (nv.Count != 0)
        {
            string strname = nv["txtbox1"];
            string strPwd = nv["txtbox2"];
        }
    }
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  • 北恋
    2020-11-30 03:48

    Remove runat="server" parts of data posting/posted .aspx page.

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  • 感动是毒
    2020-11-30 03:54

    This is very possible. I mocked up 3 pages which should give you a proof of concept:

    .aspx page:

    <form id="form1" runat="server">
    <div>
        <asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>
        <asp:TextBox TextMode="password" ID="TextBox2" runat="server"></asp:TextBox>
        <asp:Button ID="Button1" runat="server" Text="Button" />
    </div>
</form>

    code behind:

    Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
    For Each s As String In Request.Form.AllKeys
        Response.Write(s & ": " & Request.Form(s) & "<br />")
    Next
End Sub

    Separate HTML page:

    <form action="http://localhost/MyTestApp/Default.aspx" method="post">
    <input name="TextBox1" type="text" value="" id="TextBox1" />
    <input name="TextBox2" type="password" id="TextBox2" />
    <input type="submit" name="Button1" value="Button" id="Button1" />
</form>

    ...and it regurgitates the form values as expected. If this isn't working, as others suggested, use a traffic analysis tool (fiddler, ethereal), because something probably isn't going where you're expecting.

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  • 陌清茗
    2020-11-30 03:58

    In the html form, you need to supply additional viewstate variable and disable ViewState in a server page. This requires some control on both sides , though.

    Form HTML:

    <html><body> <form id='postForm' action='WebForm.aspx' method='POST'>
        <input type='text' name='postData' value='base-64-encoded-value' />
        <input type='hidden' name='__VIEWSTATE' value='' />  <!-- still need __VIEWSTATE, even empty one -->
    </form>

</body></html>

    Note empty __VIEWSTATE.

    WebForm.aspx:

    <%@ Page Language="C#" AutoEventWireup="true" 
CodeBehind="WebForm.aspx.cs" Inherits="WebForm"
 EnableEventValidation="False" EnableViewState="false" %>

<!DOCTYPE html>

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title></title>
</head>
<body>
    <form id="postForm" runat="server">
        <asp:TextBox ID="postData" runat="server"></asp:TextBox>
    <div>

    </div>
    </form>
</body>
</html>

    Note EnableEventValidation="False", EnableViewState="false" to prevent validation error for empty view state. Code Behind/Inherits values are not precise.

    WebForm.cs:

    public partial class WebForm : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        string value = Encoding.Unicode.GetString(Convert.FromBase64String(this.postData.Text));
    }
}
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  • 广开言路
    2020-11-30 04:08

    You sure can.

    The easiest way to see how you might do this is to browse to the aspx page you want to post to. Then save the source of that page as HTML. Change the action of the form on your new html page to point back to the aspx page you originally copied it from.

    Add value tags to your form fields and put the data you want in there, then open the page and hit the submit button.

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