>>>>>>>>>>On the same page I have a GridView bound to a dataset. Below the GridView there is a textbox (or several textboxes). As user navigates through the GridView (clicking on this or that row) I want the value/text in the textbox(s) to be updated according to new row in the dataset. My understanding is I need to bind the textbox(s) to the same dataset. How do you do it? An example, of one textbox binding to the dataset would be very helpful.
>>>>>>>>>
>>>>>>>>>If you don't mind round-tripping to the server you can wire up the GridView.SelectedIndexChanged event and do something like this:

protected void GridView1_SelectedIndexChanged(object sender, EventArgs e)
>>>>>>>>>        {
>>>>>>>>>            TextBox1.Text = GridView1.SelectedRow.Cells[2].Text;
>>>>>>>>>            //etc
>>>>>>>>>        }

>>>>>>>>
>>>>>>>>I prefer not to make the "trip" back to the server. I am working on having a button field on the GridView and wire it to a method of the page. The only thing I don't know - yet - if the page has to be reposted on the call to this method. If so I will look for way to do it with jQuery so there is no reposting of the page and no trip back to the server.
>>>>>>>>Thank you.
>>>>>>>
>>>>>>>Not quite so easy. Wire up the GridView.RowDataBound event in c#:

       protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
>>>>>>>        {
>>>>>>>            if (e.Row.RowType == DataControlRowType.DataRow)
>>>>>>>            {
>>>>>>>                e.Row.Attributes.Add("onClick", "javascript:void selectRow(this);");
>>>>>>>            }
>>>>>>>        }

then script on the page:

 function selectRow(i) {
>>>>>>>            document.getElementById("TextBox1").value = i.cells[5].innerText;
>>>>>>>        }

>>>>>>
>>>>>>Thank you very much. I will try to "translate" your code into jQuery code. I have been studying jQuery over the weekend and am anxious to try it.
>>>>>jQuery would just be :

function selectRow(i) {
>>>>>               $('#TextBox1').val(i.cells[5].innerText);
>>>>>        }

TBH, when I need this type of functionality now I use WebAPI and angular. angular gives you a nice MVVM two-way binding on the client.
>>>>
>>>>Thank you for the example of using jQuery.
>>>>As to WebAPI and angular, this is the first time I hear about these technologies. You mentioned MVVM but will WebAPI and angular work on ASP.NET Web Forms, as far as you know?
>>>
>>>You can use it in a Web Forms application - but where it *is* being used a simple HTML page is probably easier to work with than using a Web Form (aspx) page.
>>
>>Thank you. A lot to learn. And I found a couple of tutorials that I will go through at some point.
>>
>>Right now I am trying to figure how to pass to a jQuery function the row object values of GridView.
>
>You can't really do that directly. jQuery only sees what's on the client and at that point your datarow values are just tr's in a td...
>Using the WebApi approach you would simply pass the data as a collection of JSON objects and use angular (or similar) to bind the elements of the page to those objects. As a side effect this can greatly reduce the workload on the server and the volume of server/client traffic.
>
>> I think I need to learn JSON for that or maybe something else. My head is spinning.

You are correct (as I am learning) that jQuery will only see the tr's and td's. But if we skip angular for now since it is too much for me to take at this point, I found the following code online (that I am trying to adopt to my case):

var rowData = {
                "EquipmentID": $(this).closest('tr').find('#id_number').text(),
                  "Company": $(this).closest('tr').find('.eq_descr').text(),
                  "Model": $(this).closest('tr').find('.model').text()

I understand that 'this' is the object passed to the jQuery function() but I can't seem to figure how to use what is inside the Find() function. So far all I get is a bunch of empty strings (for each value in the pair). And I am not sure if the use of 'closest' is correct.