Getting text from a control ASP.net c#

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Hi,

I am quite new with ASP.net. I created a public class within a page that has a public function that will find a control in the page, once it finds that control it converts the control to a dropdownlist and gets the text value. i used the Page.FindControl() but it always returns a null value. Here is my code:

C#

public class Dashboard : System.Web.UI.Page
    {

        public String getTxt(string xID,String xType)
        {
            String ObjText;

            switch (xType.ToUpper())
            {
                case "DROPDOWNLIST":
                    //foreach (Control c in Page.Controls)
                    //{
                    //    if (c.ID == xID)
                    //    {

                    //    }
                    //}

                    DropDownList dlist = (DropDownList) Page.FindControl(xID);

                    if (dlist != null)
                        ObjText = dlist.Text;
                    else
                        ObjText = "";
                    break;
                default:
                    ObjText = "";
                    break;
            }


            return ObjText;
        }
    }

Any help is greatly appreciated.

Thanks,

Posted 8-Aug-12 9:31am

Franco Cipriano

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Comments

Christian Amado 8-Aug-12 15:44pm

Why you don't simply call the dropdownlist or any control for its name (ID)? It's more easy and fast.

Franco Cipriano 9-Aug-12 8:55am

Hi,

I tried doing that but it gives me an error object not set to an instance. I declared a new instance for the class with the control as it's member.

Thanks,

Franco Cipriano 8-Aug-12 16:16pm

Im accessing this public function from a class, I can't access the controls from another class so I made a public class from form1 that will access the controls from form1 so that I can use it at the Class that I created.

Thanks

Franco Cipriano 8-Aug-12 16:20pm

I was able to make the control public by declaring it public from the aspx.designer page.this got what I need, but will still try the previous approach I was thinking of

Franco Cipriano 8-Aug-12 16:28pm

I was wrong it did not give me the text value I need, it still give NULL value.

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**Shelby Robertson** · Answer 1 · 2012-08-08T10:36:00

FindControl only goes 1 level deep in its search, so if the control you are looking for isn't directly below page level, it will return null. A recursive FindControl method (there are many online, here is one: http://weblogs.asp.net/eporter/archive/2007/02/24/asp-net-findcontrol-recursive-with-generics.aspx[^]) will help you if this is the route you want to go.