How to check whether the radiobutton is checked or not in a method in code behind fil

[KajalTaneja]

Hi i am trying to check whether my RadioButton is checked or not in a method.If checked execute some code else execute another code.

But when i debug it I am getting this error

Object reference not set to an instance of an object

have gone through many links but not able to correct it.

Below is my .aspx.cs code

public static string[] GetArea(string prefixText, int count)
{
    RadioButton rb1 = RadioButton2;

        if (rb1.Checked == true)
        {
            //execute some code
           //return something
        }
        else
        {
            //else do this.
           // return something
        }
    }

I am getting error at this line

if (rb1.Checked == true)

RadioButton2 is defined in my .aspx page

<asp:RadioButton ID="RadioButton2" name="radios" CssClass="radio-button-style" runat="server" GroupName="list" Text="Chemist" ToolTip="SEARCH " />

Please Help.Thank You.

[WebBaniya]

Try if this works.

To resolve this problem, register the Adodb.dll file in the global assembly cache (GAC). On a computer where only the .NET Framework is installed, the file Gacutil.exe does not exist.. Either obtain the gacutil file by installing Microsoft .NET Framework SDK, or create a Visual Studio.NET setup project that uses the installer to install the correct components.

To register Adodb.dll in the GAC, follow these steps:
Click Start and then click Run.
In the Run dialog box, type the following command, and then click OK:
C:\WINDOWS\Micr osoft.NET\Frame work\v1.0.3705\ gacutil /i C:\Program Files\Microsoft .NET\Primary Interop Assemblies\adod b.dll

Copied from this link : https://support.microsoft.com/en-us/kb/810098

[Luk3r]

You have to use the "new" operator to create a new radio button object.

Example:

RadioButton rb1 = New RadioButton();

[KajalTaneja]

Sir when i am creating a new object then it directly executes the else's code no matter whether my radiobutton is checked or not.

[KajalTaneja]

Tried.Still getting the same error:(