Click grid view button using webbrowers control

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C#

hi everybody
i have a web page thats i use web browser contorl to go throw this web page using windows form there is a gridview with button in this page How can i access this button click using web browser control ??
i use this code but it doesn't do anything it doesn't carryout grid button click ??

What I have tried:

private void gridview1_Click(object sender, EventArgs e)
        {

            if ((gridview1.Columns.View).FocusedValue == "edit")
            {
      
                if (webBrowser1.Url.PathAndQuery == ("web page url"))
                {

                    if (webBrowser1.Document != null)
                    {
                        HtmlElementCollection theElementCollectionChildNext = webBrowser1.Document.GetElementsByTagName("input");
                        foreach (HtmlElement elChild in theElementCollectionChildNext)
                        {
                            if (elChild.InnerText == "edit")
                            {
                                elChild.InvokeMember("click", null);
                                break;
                            }
                        }
                    }

               

                    simpleButton1.Text = "edit";

                }
            }

        }