Gridview with radio column, radio id problem

Question

Hi, I have a gridview, and I put a radio column for it. But radio ids are not unique. I've read http://www.asp.net/Learn/data-access/tutorial-51-cs.aspx http://shawpnendu.blogspot.com/2009/02/problem-to-group-radio-button-across.html http://aspnet.4guysfromrolla.com/articles/122602-1.aspx but they are complicated. Do you have other solution, with c# code behind? I've also tried to give unique id with a function from code behind, but ID='<%# function(...) %>' is not allowed. Thank you in advance

Answer 1

Not totally sure what your question is, but here goes.

If you need to find a RadioButton in a GridViewRow, first get the row, then use FindControl()

GridViewRow myRow = GridView1.Rows[index];
RadioButton myRadioButton = (RadioButton)myRow.FindControl("nameOfRadioButton")

You can do that in reverse (if you need to handle the event RadioButton1_CheckedChanged, for example) by first casting the object sender to RadioButton, then casting RadioButton.Parent.Parent to GridViewRow, from which you can get the index.

Question:

Is the column you added a Template Column, in which you places a RadioButton? My two solutions will only work in this case.

Answer 2

The radio buttons need to have the same name attribute. Not unique. This is how the browser knows how to group them.

Answer 3

there is gridview code:

<asp:GridView ID="gridView_stLists" runat="server" AutoGenerateColumns="False" CellPadding="3"
                                                    BorderStyle="NotSet" CssClass="table_layout" Width="500">
                                                    <RowStyle CssClass="table_body" />
                                                    <Columns>
                                                        <asp:TemplateField HeaderStyle-Width="20">
                                                            <ItemTemplate>
                                                                <asp:RadioButton ID="rdBtn_stdl" runat="server" OnCheckedChanged="rdBtn_stdl_CheckedChanged"
                                                                    AutoPostBack="True" GroupName="stdl" value='<%# Eval("uri") %>' />
                                                            </ItemTemplate>

I think radios must have different IDs in ID="rdBtn_stdl" section

Answer 4

Found a good method at:
http://www.asp.net/Learn/data-access/tutorial-51-cs.aspx