Find Button inside a Gridview and click it from codebehind(c#)

Question

I need to click a button that is inside a gridview from the codebehind. I think the best approach will be to create a javascript function in codebehind, something like the second solution i tried below. I will appreciate any help

    protected void GridView1_RowCommand(object sender, GridViewCommandEventArgs e)
    {

        if (e.CommandName == "Accepted")
        {

            int index = Convert.ToInt32(e.CommandArgument);

            GridViewRow row = GridView1.Rows[index];

       //find button

            Button btnEsc = (Button)row.FindControl("btnEsc");

       //here I would like to simulate a click on this button, so far no luck

        btnEsc.Click(); // this is wrong

         }
      }

I also try this but it doesn't find the button: I dont know how to find the button inside the gridview

           System.Text.StringBuilder sbScript = new System.Text.StringBuilder("");
           sbScript.Append("document.getElementById('btnEsc').click();");
           ScriptManager.RegisterStartupScript(this, GetType(), "ClientScript", sbScript.ToString(), true);

do you really need to simulate the click or do you just want to execute something that the button would call if clicked? — Robson
– Robson, Commented Nov 7, 2014 at 16:15
then you just want to open a new lightbox, just call the javascript function that creates the lightbox and you're done stackoverflow.com/questions/5731224/… or other than the lightbox do you need something else? — Robson
– Robson, Commented Nov 7, 2014 at 16:20
Why not use javascript/jquery to do this? If you still need to call code-behind, make an ajax call and then open the lightbox on success. I don't see why you need such a convoluted solution when all you want to do is pass data to the lightbox. JS is perfect for this. — Chris
– Chris, Commented Nov 7, 2014 at 16:33
@Carlos, you can directly put all js code into a function say abc(arg), all js code implies, the JS code written for btnEsc OnClientClick, and then just use same RegisterStartupScript with params. It will work then. — Arindam Nayak
– Arindam Nayak, Commented Nov 7, 2014 at 16:37
Yep, use jquery. See solution, based on the same question you had then, just for demonstration... — Ziv Weissman
– Ziv Weissman, Commented Nov 7, 2014 at 16:47

Christopher W. Brandsdal · Accepted Answer · 2014-11-07 16:51:11Z

When you open the lightbox, pass in the Id to a hidden Field. You can then read it out later. Example from ListView here.

protected void lvProjectServices_ItemCreated(object sender, ListViewItemEventArgs e)
    {

            if (e.Item.DataItem != null)
            {
                Whatever data = (Whatever)e.Item.DataItem;

                PlaceHolder objPlc3 = (PlaceHolder)e.Item.FindControl("phEdit");

                LinkButton link3 = new LinkButton();
                link3.Text = "<i class=\"table-edit\"></i>";
                link3.ID = "lbEditServer" + data.Id.ToString();
                link3.CommandName = "Edit";
                link3.CommandArgument = data.Id.ToString();
                link3.Click += link_Click;
                objPlc3.Controls.Add(link3);

            }
        }


    void link_Click(object sender, EventArgs e)
    {

        LinkButton btn = (LinkButton)sender;

        int Id = int.Parse(btn.CommandArgument.ToString());

        txtProjectServiceId.Value = Id.ToString();

            ScriptManager scriptManager = ScriptManager.GetCurrent(Page);

            if (!scriptManager.IsClientScriptBlockRegistered("openSvcModal"))
            {
                ScriptManager.RegisterStartupScript(Page, Page.GetType(), "openSvcModal", "$('select').select2(); $('#editProjectService').modal();", true);
            }
    }

Ziv Weissman · Accepted Answer · 2014-11-07 16:49:54Z

Code behind:

public partial class WebForm1 : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        btn.Text = "Refreshed";
        if (Request.Params["btnPressed"] != null && Request.Params["btnPressed"] == "true")
        {
            ScriptManager.RegisterStartupScript(Page, typeof(Page), "OpenWindow", string.Format("$('#{0}').click()", btn.ClientID), true);
        }
    }

    protected void btn_Click(object sender, EventArgs e)
    {

        btn.Text = "Not Refreshed";
        lbl.Text = "Not Refreshed";
        System.Threading.Thread.Sleep(1000);
        ////to refresh the page
        Page.Response.Redirect(HttpContext.Current.Request.Url.ToString()+"?btnPressed=true", true);
    }
}

Load jquery in aspx page:

<body>
    <script src="//ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
    <form id="form1" runat="server">
    <div>
    <asp:Button runat="server" ID="btn" OnClick="btn_Click" PostBackUrl="/WebForm1.aspx" />
        <asp:Label runat="server" ID="lbl"> </asp:Label>
    </div>
    </form>
</body>

You should really learn jquery, its a great tool. g/l.

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