problem in vb to C#.net convertor

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Hi all
I hava a piece vb code
When I convert it to C# the converted code gives a error.
Can anybody help me?

vb code (this code works)

VB.NET

Do Until vreadyState = 4
            Application.DoEvents()
            vreadyState = Me.WebBrowser1.ReadyState
        Loop
        Dim eleminput As HtmlElementCollection
        Dim DocCol As HtmlDocument
        DocCol = WebBrowser1.Document
        eleminput = DocCol.GetElementsByTagName("input")

c# code

c#.net

for (; (vreadystate == 4); )
            {
                Application.DoEvents();
                vreadystate = Convert.ToInt32(this.webBrowser1.ReadyState);

            }
            HtmlElementCollection eleminput = default(HtmlElementCollection);
            HtmlDocument DocCol = default(HtmlDocument);
            DocCol = webBrowser1.Document;
            eleminput =DocCol.GetElementsByTagName("input");

When I run this code my program has a error in the last line
"Object reference not set to an instance of an object."

How to change this code to solve this error?

Posted 17-Apr-11 23:18pm

ely z

Updated 17-Apr-11 23:24pm

Tom Deketelaere

v2

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3 solutions

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Tarun.K.S · Answer 1 · 2011-04-17T23:27:00

I used this tool : http://www.developerfusion.com/tools/convert/vb-to-csharp/[^]

C#

while (!(vreadyState == 4)) {
    Application.DoEvents();
    vreadyState = this.WebBrowser1.ReadyState;
}

HtmlElementCollection eleminput = default(HtmlElementCollection);
HtmlDocument DocCol = default(HtmlDocument);
DocCol = WebBrowser1.Document;
eleminput = DocCol.GetElementsByTagName("input");

Is this working for you?

Prerak Patel · Answer 2 · 2011-04-17T23:28:00

Solution 3

webBrowser1??!

Make it WebBrowser1.
Or, let us know where exactly you get this error.

Posted 17-Apr-11 23:28pm

Prerak Patel

v2

Comments

BobJanova 18-Apr-11 7:24am

Good catch.

Toniyo Jackson · Answer 3 · 2011-04-17T23:28:00

Solution 4

Change this

HtmlElementCollection eleminput = default(HtmlElementCollection);
HtmlDocument DocCol = default(HtmlDocument);

to

HtmlElementCollection eleminput;
HtmlDocument DocCol;

Posted 17-Apr-11 23:28pm

Toniyo Jackson

Updated 17-Apr-11 23:35pm

v3

Comments

ely z 18-Apr-11 5:32am

i change it
but i have error in my program

The type 'System.Windows.Forms.HtmlElementCollection' has no constructors defined

Toniyo Jackson 18-Apr-11 5:36am

Check the answer now