How to get the Selected Value of all List controls that are present in a Page

Posted Date: 07 Oct 2005	Resource Type: Articles	Category: ASP.NET/Web Applications
Author: Harish Ranganathan	Member Level: Gold
Rating:	Points: 10

Introduction

This article describes how to get the selected values of all list controls present in a page using just a single method.

Common Requirement

One of the common requirements we see as required by developers is to create a Questionnaire which consists of many questions with Radio Button Options as answers.

To loop through all the radiobuttons and get the selected value of them, its tedious if you write code for each and every radiobutton.

Code to Accomplish this task

The following code accomplishes the task.


private void Button1_Click(object sender, System.EventArgs e)

{



foreach(System.Web.UI.Control ctl in this.Page.Controls)

{

LoopAllControls(ctl);

} 

}


public void LoopAllControls(System.Web.UI.Control oControl)

{

foreach(System.Web.UI.Control frmControl in oControl.Controls)

{

if(frmControl.GetType().ToString()=="System.Web.UI.WebControls.RadioButtonList")

{

RadioButtonList rList=new RadioButtonList();

rList=(RadioButtonList)frmControl;

Response.Write(rList.SelectedValue);

}

if(frmControl.HasControls())

{

LoopAllControls(frmControl);

}

}

}

Summary

The above code just Response.Writes the selected values of the radio button lists. You can have as many radio button lists as you want in the page. The above code would work for the same.

However, if you want to find some total or store, you can use a variable to get each value.

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