CODEWITHSUNDEEP
asp.netvb.net
Tempuslight
Tempuslight

Reputation: 1223

Getting the correct control from an asp repeater

So I'm working in ASP.NET and VB.NET right now. Here's how I display my view: 

<tr>
    <td colspan="2">&nbsp;
        <TABLE id="Table1" cellSpacing="0" cellPadding="0" width="100%" border="0">
            <TR>
                <TD>
                    <asp:repeater id="repVKM" runat="server">
                        <ItemTemplate>
                            <br>
                            <input id="radioBtnID" type="radio" name="radVKM" value='<%# DataBinder.Eval(container.Dataitem, "BJBVKMID") %>'>
                            <%# DataBinder.Eval(Container.DataItem, "BJBVKM") %>
                        </ItemTemplate>
                    </asp:repeater>
                </TD>
            </TR>
        </TABLE>
    </td>
</tr>

Here's how I fill the radiobuttons in the repeater: 

Me.repVKM.DataSource = clsInschrijving2elijnManager.GetVoorkeurMateries(False)
Me.repVKM.DataBind()

And here's how I'm trying to see which radiobutton was checked: 

Dim voorkeurMateries = repVKM.Items
Dim selectieVKM As String
For Each item As RepeaterItem In voorkeurMateries
    Dim rb As RadioButton
    rb = item.FindControl("radioBtnID")
    If rb.Checked Then
         selectieVKM = rb.Text
         Exit For
    End If
Next

It gives a "Nothing" error (like a null error) on the value for "rb" because it seems like he can't find the correct control? I don't know very much about VB.NET and ASP.NET so I can't seem to find the solution.

Upvotes: 0

Views: 29

Answers (1)

VDWWD
VDWWD

Reputation: 35564

There are two problems with your code. First, there is no runat="server" tag on the RadioButton so it can never be detected in code behind.

Second, you are looking for a RadioButton Control, while in the HTML you have a normal html radio.

So either add the runat=server to your existing RadioButton

<input id="radioBtnID" runat="server" type="radio" name="radVKM">

And change the code behind to

Dim radio As HtmlInputRadioButton = CType(item.FindControl("radioBtnID"),HtmlInputRadioButton)

Or make it a "real" aspnet control in the Repeater. Then the code in the loop is correct.

<asp:RadioButton ID="RadioButton1" runat="server" Text='<%# Eval("radVKM") %>' />

Upvotes: 1

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