Controls You Can Use on Web Forms   ASP.NET Standard Controls   RadioButton and RadioButtonList Controls

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You can add radio buttons to a Web Forms page in two ways:

• By adding individual RadioButton Web server controls and grouping them.
• By adding a RadioButtonList control and adding individual list items to the control.

NOTE: This topic addresses how to add individual RadioButton controls to the page. For details about adding a RadioButtonList control, see Adding RadioButtonList Controls to a Web Forms.

For details about the differences in these approaches, see Introduction to the RadioButton and RadioButtonList Controls.

When you use individual RadioButton Web server controls, you typically add a set of them to the page and then group them. You can create multiple separate groups of buttons.

1. Declare an <asp:RadioButton> element on the page. For syntax, see RadioButton Control Syntax.
2. Specify a caption by setting the control’s Text property.
3. Optionally change the orientation of the caption by setting the TextAlign property.

<asp:RadioButton id="Radio1" Text="button caption here" runat="server" />

• Set the GroupName property of each control to the same name. You can use any string as the name, but do not include a space. For example, you might assign the string RadioGroup1 to the GroupName property of all the buttons.

<asp:RadioButton id="Radio1" Text="button caption here" GroupName="RadioGroup1" 
   runat="server" />

RadioButton1.aspx Run Sample | View Source

To create multiple groups, use a different group name for each.

NOTE: You can add RadioButton controls to the page and group them with existing groups at any point.

Setting and Getting the Selection in a RadioButton Control   Responding to a User Selection in a RadioButton Group