Use of RadioButtonList in Datalist

Question

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Hello,
In my project i am using a data-list to display all the questions and the corresponding options are in radiobutton-list
now the problem is in Datalist-ItemBoundEvent only the first option is binding,rest options are not displaying in the radiobutton list
my asp page is

XML

<asp:DataList ID="dlQuestions" runat="server" CssClass="datalist" OnItemDataBound="dlQuestions_ItemDataBound">
                <ItemTemplate>
                    <table>
                        <colgroup>
                            <col class="column1" style="" />
                            <col class="column2" style="" />
                        </colgroup>
                        <tr>
                            <td>
                                <span class="heading4"><%#Container.ItemIndex+1 %>.</span>
                                <asp:HiddenField ID="hf1" runat="server" Value='<%#Eval("TrainingExamQuestionBankId")%>' />
                            </td>
                            <td>
                                <span class="heading4"><%#Eval("Question") %></span>
                            </td>
                        </tr>
                        <tr>
                            <td></td>
                            <td class="Label">
                                <asp:RadioButtonList runat="server" ID="rbOptions">
                                </asp:RadioButtonList>
                            </td>
                        </tr>
                    </table>
                </ItemTemplate>
            </asp:DataList>

and my cod behind is like

C#

 protected void dlQuestions_ItemDataBound(object sender, DataListItemEventArgs e)
        {
            if (e.Item.ItemType == ListItemType.Item || e.Item.ItemType == ListItemType.AlternatingItem)
            {
                RadioButtonList RadioButtonList1 = (RadioButtonList)e.Item.FindControl("rbOptions");
                HiddenField hdn = (HiddenField)e.Item.FindControl("hf1");
                int QuestionId = Convert.ToInt32(hdn.Value);
                var query = (from a in TraningExamQuestionBank
                             where a.TrainingExamQuestionBankId == QuestionId
                             select new
                             {
                                 a.OptionA,
                                 a.OptionB,
                                 a.OptionC,
                                 a.OptionD,
                                 a.OptionE,
                             }).ToList();
                DataTable dt = ConvertToDataTable(query);
                RadioButtonList1.DataSource = dt;
                RadioButtonList1.DataTextField = dt.Columns[0].ToString();
                RadioButtonList1.DataValueField = dt.Columns[0].ToString();
                RadioButtonList1.DataBind();
            }
        }
public DataTable ConvertToDataTable<T>(IList<T> data)
        {
            PropertyDescriptorCollection properties = TypeDescriptor.GetProperties(typeof(T));
            DataTable Table = new DataTable();
            foreach (PropertyDescriptor prop in properties)
                Table.Columns.Add(prop.Name, Nullable.GetUnderlyingType(prop.PropertyType) ?? prop.PropertyType);
            foreach (T item in data)
            {
                DataRow row = Table.NewRow();
                foreach (PropertyDescriptor prop in properties)
                    row[prop.Name] = prop.GetValue(item) ?? DBNull.Value;
                Table.Rows.Add(row);
            }
            return Table;
        }

please help....!!

Posted 20-Apr-14 19:46pm

Amit Kumar143

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Comments

DamithSL 21-Apr-14 2:06am

what is the type of OptionA? string or bool?

Amit Kumar143 21-Apr-14 2:08am

it is varchar

1 solution

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DamithSL · Accepted Answer · 2014-04-20T20:17:00

it seems you have one record with all the options and it will bind in to a one item in radio button list. what you can do is; get the record and create list with all the options and bind it to radio button list as below

C#

var item= (from a in TraningExamQuestionBank
                             where a.TrainingExamQuestionBankId == QuestionId
                             select new
                             {
                                 a.OptionA,
                                 a.OptionB,
                                 a.OptionC,
                                 a.OptionD,
                                 a.OptionE,
                             }).FirstOrDefault();
if(item !=null)
{
        List<string> items = new List<string>(){ item.OptionA, item.OptionB, item.OptionC, item.OptionD,         item.OptionE};
        RadioButtonList1.DataSource = items;  
        RadioButtonList1 DataBind(); 
}