CODEWITHSUNDEEP
c#asp.net.netwebforms
Kajbo
Kajbo

Reputation: 1158

Dynamically add ListItem to RadiobuttonList with proper ID in ASP.NET

I'm trying to dynamically add radio buttons from code behind. I add it by calling the following code:

    private void AddRadioButtonList(string id, bool isBool)
    {
        RadioButtonList radioButtonList = new RadioButtonList();
        radioButtonList.ID = id;
        form1.Controls.Add(radioButtonList);
        if (isBool) { GenerteTrueFalseListItems(radioButtonList); }
        form1.Controls.Add(new LiteralControl("<br />"));
    }

When isBool is true, the following function is called:

    private void GenerteTrueFalseListItems(RadioButtonList item)
    {
        item.Items.Clear();
        item.Items.Add(new ListItem("True", "true"));
        item.Items.Add(new ListItem("False", "false"));
    }

But radio buttons on page are missing correct IDs, and I can select only one radio button from whole page.

radio buttons rendered wrong on page

I am expecting the IDs of the radio buttons to be either "true" or "false".

What should I do in order to have radio buttons rendered correctly?

Upvotes: 0

Views: 2947

Answers (1)

johna
johna

Reputation: 10772

The value of the input element will be true or false but the ID is automatically generated by ASP.NET based on the ID you give the RadioButtonList (not the ListItem) and then an underscore and then a sequential number for each RadioButtonList option. (Will vary based on ClientIDMode setting).

So if you assign an ID of test to a RadioButtonList then the input elements that ASP.NET generates for each ListItem will have the ID test_1, test_2, test_3, etc etc.

If you were to change to RadioButtons instead of a RadioButtonList then each RadioButton would have the ID you specify (depending on ClientIDMode).

Upvotes: 1

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